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Manaran

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7 posts
1996 240sx se
Vienna VA
8-7-2008

  NA Build?


Hey I got a 96 240sx and am just looking at my options. If I were to go NA I was trying to look at general hp gain. I am also trying to stay street legal in fairfax, VA so keep that in mind.
-Intake: 5hp
-headers: 10hp
-exhaust: 10hp
-JWT chip: 20hp

leaving me at around 200 HP probably a little bit less is this correct? I don't know much so just let me know.


Thank you

chrismo240sx

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418 posts
93 240sx with I,H,E, JWT ECU, Pulley, and E-fan= still slow, Need Boost
Coram NY
2-5-2007

 « Re: NA Build? (Manaran)


dude, um going NA is fine, but where are you coming up with those numbers from? The JWT ECU doesnt add 20hp

To help you out, i have an all motor setup basically on my Ka with the JWT ECU ( all bolt-ons except cams) and there is no way i got 20hp from the ECU.

Basically that 200hp goal you were talking about.....maybe, maybe at the crank if youre lucky. But with just those simple little bolt-ons (I/H/E/ECU).....
i'd say arund 160 to the wheels.

I never had my car dynoed yet, but if i had to venture a guess....id say i have around 165-175 whp.

Hope that helps!

Manaran

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7 posts
1996 240sx se
Vienna VA
8-7-2008

 « Re: NA Build? (chrismo240sx)


OO, I'm just thinking of numbers my bmw got when i had it. Also looking at chips for other cars since not much is given on 240sx chips.
Ajax

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870 posts
1991 240sx SE
Minneapolis MN
3-12-2003

 « 


The thing to remember about performance gains is that they do not add up like you'd like them to. An intake is going to show peak gains in a different spot in the powerband than an ecu tune will. Likewise with cams vs header. Those mods together may get you 150whp.
No one on NICO has shown a true 200whp NA KA on pump gas- not saying it isn't possible or even doesn't exist, but no one has shown one.



1991 240sx SE hatch w/ VLSD

glitched



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1505 posts
1992 240sx se
Madison WI
6-25-2004

 « Re: (Ajax)


200whp not gonna happen on a budget.

I remember a thread on another forum of dyno proof of 200 crank hp. that basically centered around letting the ka breath, intake header exhaust and dyno tunning with a "chip" and timing changes



WTB: convertible with swap.
2007 Rookie of the year
2007 & 2008 Season points champion.



WTB: convertible with swap.

Manaran

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7 posts
1996 240sx se
Vienna VA
8-7-2008

 « Re: (glitched)


Alright well thanks all, suppose I'll just start saving for a turbo, gotta get an LSD and suspension first, as well as fix the evil speedometer. The no abs is a bit bothersome to, but i guess i can pump away but I've never used a non abs on a track and it worries me a bit.
-RJ-



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1337 posts
S13 Convertible
VA Beach VA
8-9-2006

 « Re: (Manaran)


haha there you go, boost is the only way to go. I wanted to go all motor with my kade but when i did research about it, i can get almost 300whp on turbo than getting 170 whp with all motor.

If your motor is in good shape, you can get a t3/t4 turbo and get around 230whp on a stock motor at 8 lbs.




HorsePower = rpm x Torque
...................5252(constant)
Iceman00



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52 posts
cars women
Around FL
10-13-2003

 « Re: (Manaran)


Boost is for bitches.
The KA needs a real intake manifold, and Cams to make top end power. JWT or Crower V3's would do the trick.

Greaser on Freshalloy made a 210whp on a All motor KA, so it can be done.



silent drifter is weak!

Your entitled to my opionion!

Ajax

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870 posts
1991 240sx SE
Minneapolis MN
3-12-2003

 « Re: (Iceman00)


Quote, originally posted by Iceman00 »
Boost is for bitches.
The KA needs a real intake manifold, and Cams to make top end power. JWT or Crower V3's would do the trick.

Greaser on Freshalloy made a 210whp on a All motor KA, so it can be done.

link? does he have a dyno? what sort of engine management?

-RJ-



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1337 posts
S13 Convertible
VA Beach VA
8-9-2006

 « Re: (Iceman00)


Quote, originally posted by Iceman00 »
Boost is for bitches.
The KA needs a real intake manifold, and Cams to make top end power. JWT or Crower V3's would do the trick.

Greaser on Freshalloy made a 210whp on a All motor KA, so it can be done.

but why would you want 210whp when you can have 400whp?

Ajax

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870 posts
1991 240sx SE
Minneapolis MN
3-12-2003

 « Re: (-RJ-)


Quote, originally posted by -RJ- »

but why would you want 210whp when you can have 400whp?


Because some people don't feel the need to compensate for other inadequacies?
But seriously, I'm not sure what would be the point of 400hp in a car under 3000lbs, unless you put it on the track. This question has popped up every now and again- why shoot for 200 when you can do twice that for cheaper. And people say "to be different" or "because I don't like turbo".
But honestly, if I can hit 180 whp with matching torque and responsiveness of NA, I'll be very happy with the results. I already have to be a little cautious on take off- I can't imagine what driving would be like in this car with more than double that.
I don't know. I'm at work and probably shouldn't have opened this can of worms, I guess I just hate the turbo trolling.
ss82480

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334 posts
1992 240sx Coupe
Ft Worth TX
6-27-2004

 « Re: (Ajax)


I'm with Ajax, while staying NA is "different", quite honestly I love the torque and responsive feel of the KA. It just seems that everyone these days are so quick to say "turbo that sumbish!" Unless you actually track your car, theres really not much need for say more than 150-200 at the wheels for this small car. All of this is simply my opinion of course.

And to the OP I have intake/header(straight pipe)/exhaust, underdrive pulley, lightweight flywheel, cold air intake, BC stage 2 cams, tuned SAFC(for what thats worth) also running z32 fuel filter with advanced timing. I am pushing right about 160whp on an s13, with the torque numbers just a pinch higher.




Iceman00



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52 posts
cars women
Around FL
10-13-2003

 « Re: (Ajax)


Quote, originally posted by Ajax »

link? does he have a dyno? what sort of engine management?

Yeah, he had a Dyno. It was about 207whp and 200+wtq. Awesome. Check Freshalloy for "greaser" in the KA forums.

From what I remember, it was SOHC pistons, Intake, Custom header, Exhaust, BC v3's, And AEM EMS. He also had ITB, but tested a intake manifold with good results.

Xcessive offers a KA manifold that will wake up the top end, though you will lose low end.

480sx
Angry Hippie



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2790 posts
1991 White/Black s13 1996 Pearl White 240sx
Northern Va
11-12-2006

 « Re: (Iceman00)


Quote, originally posted by Iceman00 »

Greaser on Freshalloy made a 210whp on a All motor KA, so it can be done.

He also droped like 5 grand+ doing it. AEM EMS, race gas, ITB's, just a stupid amount of work and money for... 200 hp..... You can do a 1500 dollar budget turbo build and hit 250ish hp with no problems.

N/A ka is a waist unless your doing a FCW crank build. The ka doesnt want to make power up top because of its half weighted crank.



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Iceman00



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52 posts
cars women
Around FL
10-13-2003

 « Re: (480sx)


Quote, originally posted by 480sx »

He also droped like 5 grand+ doing it. AEM EMS, race gas, ITB's, just a stupid amount of work and money for... 200 hp..... You can do a 1500 dollar budget turbo build and hit 250ish hp with no problems.

N/A ka is a waist unless your doing a FCW crank build. The ka doesnt want to make power up top because of its half weighted crank.


Lets be honest here, you don't have to drop the coin he did to get close, and you know it.
Ajax

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870 posts
1991 240sx SE
Minneapolis MN
3-12-2003

 « 


Okay, there it is. pump gas recorded 182 hp at the wheels. I've seen a few threads on getting 200hp with 100 octane or better. Everyone needs to keep this in mind!
I'll be getting that Xcessive manifold this winter, and will try a few plenum sizes to see what difference we can make with that.
480sx
Angry Hippie



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2790 posts
1991 White/Black s13 1996 Pearl White 240sx
Northern Va
11-12-2006

 « Re: (Iceman00)


Quote, originally posted by Iceman00 »

Lets be honest here, you don't have to drop the coin he did to get close, and you know it.

I am being honest here dude. You DO have to drop that kind of money. A KA with bolt ons isnt going to get you even 170 hp.

What you guys dont understand is this is NOT a freaken honda. The motor was not built to rev high. It was not designed with a fully counterweighted crank. It has a half counterweighted crank. Basically, what this means is that when the engine is at high rpm operation, crank vibrations and harmonics are really harsh. This eats your power up exponentially as you go up the RPM range. On every Ka dyno you can see this. Your TQ starts to take a serious dive after 5500 rpms, and your hp doesnt climb anywhere nearly as sharply as it would on a FCW motor. (honda, DSM, w/e)

Out of the 100's of Ka24De N/A builds, this is ONE GUY thats got over 200 hp. Everyone else has fallen far short of the 200 hp goal. The idea that your going to be able to duplicate his results without spending as much money as he has is absurd.

If you want to go for a N/A build, i would suggest a SOHC as it has much more room for a more aggressive cam.

Or, get a 1600+ dollar FCW crank for a Ka24de and rock on with your bad N/A self. Build a 10k rev limit head, and hit 300 hp with race gas and high comp pistons.

Iceman00



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52 posts
cars women
Around FL
10-13-2003

 « Re: (480sx)


Quote, originally posted by 480sx »

I am being honest here dude. You DO have to drop that kind of money. A KA with bolt ons isnt going to get you even 170 hp.

What you guys dont understand is this is NOT a freaken honda. The motor was not built to rev high. It was not designed with a fully counterweighted crank. It has a half counterweighted crank. Basically, what this means is that when the engine is at high rpm operation, crank vibrations and harmonics are really harsh. This eats your power up exponentially as you go up the RPM range. On every Ka dyno you can see this. Your TQ starts to take a serious dive after 5500 rpms, and your hp doesnt climb anywhere nearly as sharply as it would on a FCW motor. (honda, DSM, w/e)

Out of the 100's of Ka24De N/A builds, this is ONE GUY thats got over 200 hp. Everyone else has fallen far short of the 200 hp goal. The idea that your going to be able to duplicate his results without spending as much money as he has is absurd.

If you want to go for a N/A build, i would suggest a SOHC as it has much more room for a more aggressive cam.

Or, get a 1600+ dollar FCW crank for a Ka24de and rock on with your bad N/A self. Build a 10k rev limit head, and hit 300 hp with race gas and high comp pistons.

Completely false. Greaser Made this mch power on 3 things.
Manifold: he used ITB
Cams: More aggressive than JWT and V2's
Tuning: The EMS, and tuning time is what made this cost a lot.

He also had a mild porting job, SOHC pistons (Which he changed to 10.5:1 forged, because the SOHC ones had blowby issues)

You could duplicate his build, and get close with Half the money he spent, and for the Record, my Jwt powered KA redlined at 7000rpm, the same as Greaser's build. No issues. I agree though, a FCW crank would make a world of difference.

480sx
Angry Hippie



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2790 posts
1991 White/Black s13 1996 Pearl White 240sx
Northern Va
11-12-2006

 « Re: (Iceman00)


It doesnt even really seem like you know that much about his build man. It sounds like your just bandwagoning on a thread/idea you skimmed over and you think 200 hp is easy to get out of a N/A ka.

Im no expert on his build either, dont get me wrong. Find his build thread and link it so i can take a look again. IIRC, he had a fully built race head. He also had to try time and time again to break the 200 HP mark.

Almost every ka redlines at 7000, i never said there would be any problems. If you dyno it though, you will see what im talking about. TQ takes a hard dive after 5500 RPMs, and HP doesnt climb nearly as quick as it would with a honda. This is your crank vibrations/harmonics robbing power from the engine.

Also, were talking about Dyno HP which is kinda just an abstract number. Every dyno measures hp differently, and is really just a tuning tool. Real HP is measured by trap times+weight of the car at the strip.

Please find these other 200 hp N/A ka build threads and link them to this thread.

Ajax

Offline

870 posts
1991 240sx SE
Minneapolis MN
3-12-2003

 « Re: (480sx)


Quote, originally posted by 480sx »

Also, were talking about Dyno HP which is kinda just an abstract number. Every dyno measures hp differently, and is really just a tuning tool. Real HP is measured by trap times+weight of the car at the strip.

What?
Dyno is the basic measuring tool for hp and torque. Times and speeds at the strip are affected by too many variables such as tires and gearing, wind, elevation, driver experience (or lack thereof). Not that they don't have value, mind you, but its just not a good way to judge the quality of an engine by itself. Some dynos measure differently than others, yes, but there are only a few types and they generally will give similar results between same models- Most dynojets will be comparable to each other. Clayton is the only one I can think of that gives statistically different numbers
Yes Greaser spent a lot of time on the dyno and went through several iterations of intake setups (I really just skimmed the thread- he used ITBs and 100 octane) and tuning
http://forums.nicoclub.com/showthread.php?t=186114
I'm looking for the other thread I read yesterday.
There it is:
http://forums.nicoclub.com/sho...24190
I obviously should have stayed out of this whole thing; I see that now.

Ajax

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870 posts
1991 240sx SE
Minneapolis MN
3-12-2003

 « 


Ahh crap, those links don't work do they. I fail. I'll try to fix that.
Ajax

Offline

870 posts
1991 240sx SE
Minneapolis MN
3-12-2003

 « 


http://forums.nicoclub.com/sho...24190
What the..? why does NICO change the forum name? Internet owns me.

Here, I'll type it:
http://formus.nicoclub.com/sho...24190

Nope it did it again. well I'm at a loss.
I found the thread by googling "greaser_ ka"
then went to the boardtracker link, and clicked on 200rwhp na ka- that should get you an 8page thread.

Ajax

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870 posts
1991 240sx SE
Minneapolis MN
3-12-2003

 « 


Just found out on the other na thread- no linking to competing forums. So its not the internet as a whole that owned me, just NICO.
I think a lot of the same info on that FA thread has been discussed on NICO as well FYI.
Iceman00



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52 posts
cars women
Around FL
10-13-2003

 « Re: (Ajax)


There is a guy on the 240sx Forums with a N/A build on pump gas, crower V3's and damn amazing head work, running Emanage Ultimate, as well as excessive's Intake manifold

Last I heard, without tuning the cams, he was at 187whp. When he gets the cam timing dailed in, expect over 200whp easy.

And greaser didn't even have a race head port job. I kept up with his project, every thread of it.

Ajax

Offline

870 posts
1991 240sx SE
Minneapolis MN
3-12-2003

 « 


I'm looking for some decent gains with the intake. I'm only running AFC NEO, but I've got a lot of internals done. AMS built the engine.
liquid_cool



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342 posts
1990 240sx ka24de swap
Las Vegas nevada
7-5-2008

 « Re: (Iceman00)


Quote, originally posted by Iceman00 »
Boost is for bitches.
The KA needs a real intake manifold, and Cams to make top end power. JWT or Crower V3's would do the trick.

Greaser on Freshalloy made a 210whp on a All motor KA, so it can be done.

Iceman makes a point...as far as cheep..its not gona happen..im trying a ka24de N/A build myself...its been nothing but an adventure in finding deals..it can be done thou.....there is an article about a ka24de that was 190ish at the wheels..and then converted to turbo with over 700+ whp..scary....before you turbo man..think about your gaol for the car...are you a drag racer?...then just get headstuds and spray!..cheep hsp!...are you a drifter..you dont need super hps for drifting..just a love for it...or do you touge?..you might want a turbo there for straits and after the corrner..there is alot to think about...allso tuning a cars motor you have to consider what rpm range your tuning for?...low..low to mid..mid to high..high end?..the possibilitys are endless...stay N/A for now..figure out what style you prefer..then upgrade for power later.

thats my advice. Liquid_cool
http://www.myspace.com/liquid_cool_ka24de




http://www.myspace.com/liquid_cool_ka24de
Bigvinnie



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929 posts
240sx/KA24de 1991 coupe with installed OBX HLSD
Walnut Creek CA
4-7-2005

 « Re: (480sx)


Quote, originally posted by 480sx »

He also droped like 5 grand+ doing it. AEM EMS, race gas, ITB's, just a stupid amount of work and money for... 200 hp.....

If you ask me Greaser was into boosting engines and his concept of head porting was a bit on the excessive side for intake velocity. His engine would of probably made better numbers with just a slight 1 mm port increase to the head. Instead of porting and extruding the crap out of it.
(My Personal Opinion)

You don't need an AEM EMS to make that kind of power, you also don't need race gas. It won't cost $5000. You could probably get away with a 200WHP set up for roughly 3 grand and very little head work needed.

Quote, originally posted by 480sx »

N/A ka is a waist unless your doing a FCW crank build. The ka doesnt want to make power up top because of its half weighted crank.

The KA engine does O.K though. I've made my stock block rev happy to 6500RPM peak power rather than the stock peak power of 5800 rpm just by changing to the N60 MAF and changing the K value that the ecu will think it responds to under load.
Sure a lighter fully counter weighted crank would be better harmonically for that happy rev place and additional HP to about 7000 maybe 8000peak, but me like most people that do NA KA's are just frugal, cheap SOB's .





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Bigvinnie



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929 posts
240sx/KA24de 1991 coupe with installed OBX HLSD
Walnut Creek CA
4-7-2005

 « Re: (480sx)


Quote, originally posted by 480sx »

Also, were talking about Dyno HP which is kinda just an abstract number. Every dyno measures hp differently, and is really just a tuning tool. Real HP is measured by trap times+weight of the car at the strip.

Dyno tuning isn't abstract .
Dyno tuning machines use an equation to give a statistical average that is based off the 5200/5200 RPM cross over. In reality does any engine truely make a torque and HP crossover at exactly 5200/5200 RPM... NO but it is a guidline to put an engine measurement within the realm to satifactory tune an engine and show comparisons from losses and gains.
If it was abstract there simply wouldn't be any type of mathmatical equation to follow, it would just be all over ther place, well like an abstract painting....

The only variable that I could see as being abstract is drive train degredation losses which are in accurate from car to car.

Ajax

Offline

870 posts
1991 240sx SE
Minneapolis MN
3-12-2003

 « 


Thanks Vinnie!
Did you see the engine in person, or just follow the threads? I don't remember where Greaser is from.
Bigvinnie



Offline

929 posts
240sx/KA24de 1991 coupe with installed OBX HLSD
Walnut Creek CA
4-7-2005

 « Re: (Ajax)


I followed the threads. I also replied. I got nothing but bashing in that thread from guys that are boost heads... They may be book smart and build good turboed engines, but to tell you the truth they don't know sh#t about basic flow characteristics on velocity.

Greaser ported his head a little more than he needed to which probably cut down on power. With out proper velocity to the cylinders the engine only starves itself as it consumes more fuel on larger injectors, causing more of a choking effect to the cylinder chambers. He could of left the head alone used larger lift and duration cams, possibly even larger valves and would of had better results than that port work he did...

High compression doesn't mean that you should increase port sizes further than what OEM stock sizes has to offer. The design was meant to take care of 2.4 liter displacement, not compression. Velocity flow rates barely change under high compression, infact there less velocity if the cams remain in stock OEM placement because higher compression decreases cc's, so to port the crap out of a head makes no sence to me.. In all; this would mean just more retard to cams where stock placement would be rather than modify and porting a head more than it should be. Since now you need to increase volumetric cylinder efficiency to the highest point of the cam lift and it's duration. Alot of people think that higher compression equals more power with porting wich is just blatant and false information.... Now if his KA could have reved to 10,000 RPM, then I would see why it would be important to port and extrude more than what stock diameter sizes have to offer because then you are multiplying RPM to liter displacement which is what is required for larger diameter port and extruded sizes from stock.

I've helped on a few builds that were just minor.... Let me say this to make it clear MINOR port and polish within 1mm increments and made better numbers on less compression than greasers build...

Forums are all hype man........



Modified by Bigvinnie at 11:17 PM 9/9/2008

Ajax

Offline

870 posts
1991 240sx SE
Minneapolis MN
3-12-2003

 « 


Boost Heads. That's my new insult of the day.
Vin, what's your take on the Xcessive intake manifold? Obviously its designed with boost in mind- what kind of changes would you make?
Asking because I'm planning on getting one, then trying some custom plenum designs for a dyno-comparo.
Bigvinnie



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929 posts
240sx/KA24de 1991 coupe with installed OBX HLSD
Walnut Creek CA
4-7-2005

 « Re: (Ajax)


Quote, originally posted by Ajax »
Boost Heads. That's my new insult of the day.
Vin, what's your take on the Xcessive intake manifold? Obviously its designed with boost in mind- what kind of changes would you make?
Asking because I'm planning on getting one, then trying some custom plenum designs for a dyno-comparo.

I wouldn't use it at all, the design of that manifold is for manifold pressure.
Runners are also to short which would effect high end power and disrupt intake manifold flow.

Personally when the manifold first came out I thought it would be great for an NA application. After further review and insight on reading some books on fluid dynamics my whole reasoning changed from liking it to not liking it..

If the KA had larger displacement and was less rev happy from Bore X stroke, then maybe I would think or consider, it could possibly work better with something like a brian crower 2.6liter stroker kit, but I don't see it working well with stock displacement or higher compression.

I think because the TB and plenum are so large on that excessive manifold you would probably spend months trying to retune your cas and K values, it just seems as if it would actually slow down velocity as it passes through the MAF. Now if you were to use a MAP, I think you could run into problems with calculating manifold pressure if there would even be any, using such a large plenum to it's displacement.



Modified by Bigvinnie at 8:49 PM 9/10/2008

Ajax

Offline

870 posts
1991 240sx SE
Minneapolis MN
3-12-2003

 « 


Well, now that you mention it, I do have a stroked engine. I had AMS build a BCstroked KA with 10.5:1 compression, AMS race head with BC V3 cams, JWT ECU with AFC NEO piggied.
I've got plenty of torque, and the hp is there for the meat of the powerband, but it still falls flat above 6k. The fuel had to be leaned out as it simply wasn't getting enough air up top- leading to the theory that the intake manifold is severely limiting airflow. Hence, experimentation with intake manifolds is expected to make huge impressive gains. Since there is no complete custom manifold design out there, we are left with fabbing up our own or modifying the stock. To me it looks like the Xcessive runners are about the same length as most ITB setups (ITBs just too expensive at this point), so it seems plenum size and shape would be the first place that we should try modifying (also the easiest since we can make a template with the runners and make several copies, and dyno several different versions in relatively little time).
480sx
Angry Hippie



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2790 posts
1991 White/Black s13 1996 Pearl White 240sx
Northern Va
11-12-2006

 « Re: (Ajax)


Never said that dyno tuning itself was abstract, just the number that you were left with was.

Its a well known fact that dyno hp is not a true reading of HP, and is not set in stone. Each dyno measures HP differently. Sure, comparing one car on a dyno jet to another car on a dyno jet is a good comparison. However, these numbers are not written in stone true hp. A dynos primary purpose is to be a tuning device to let you dial in more power from your engine. The real standard of HP is measured at a track by figuring out what your trap times are compared to the weight of your vehicle. That is the universal standard for measuring hp.

You guys are making it sound like 200 hp is an easy feat with a Ka, when its not at all. Out of EVERYONE who has done a N/A Ka build you'v got one guy whos broken 200 hp, on a dynojet. Dyno jets give you those feel good numbers, put the same car on a mustang dyno and you probably wont be over 200. Seriously, a dyno jet reads way to high for everything. Once again, dyno measured hps are nearly meaningless without a trap time/weight measurement to back them up.

Boost pwns you... 1500 dollar turbo setup for 250 hp or '3000'(id love to see a 3000 dollar 200 n/a build) for 200 hp.

Ajax

Offline

870 posts
1991 240sx SE
Minneapolis MN
3-12-2003

 « 


Okay, I can see where you're coming from, but its really a moot point. Its much easier to strap a car to a dyno and tweak things between runs than it is to run a car throught the traps, make adjustments, and do it again. That's why dynos exist.
Breaking 200whp is not easy, but getting close isn't too hard, especially if you do all the work (competently) yourself. (200 isn't too bad if you run race gas)
I don't know why you feel the need to continue arguing on this subject; this topic is about naturally aspirated KAs, not turboed KAs. I have a lot of respect for modern FI engines, but its not the point here.
Good day.
480sx
Angry Hippie



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2790 posts
1991 White/Black s13 1996 Pearl White 240sx
Northern Va
11-12-2006

 « Re: (Ajax)


You just said 'boost heads' was an insult and i thought id poke at you a bit for saying so. I realize that this topic is about N/A kas.. Thats why my posts are pretty much completely talking about the N/A ka besides what i said to you.

You got a link to your build thread? Id love to read about your FCW crank build. How about a dyno sheet? The only N/A fcw crank build i read about was in a mag, i bet its a blast to drive. Whats your redline?

Ajax

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870 posts
1991 240sx SE
Minneapolis MN
3-12-2003

 « 


Gotcha.
I don't have a thread for this particular build as my previous build turned out so horribly (I have a lawyer friend helping me to see if I can recover some of my losses from the first go round).
I have paper dynos and no scanner, so I can't show you the graph. Its not just an FCW crank though, it is a stroked crank- now 2.6 liters. As I said previously, hoping for insight from Vin, it feels like its running out of air up top, so I really haven't bothered running it past 6500 or so. Throttle response is quite nice though, and should be even better once we figure out a decent intake option.
480sx
Angry Hippie



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2790 posts
1991 White/Black s13 1996 Pearl White 240sx
Northern Va
11-12-2006

 « Re: (Ajax)


If your not going to fab one yourself check out Gato's IM. IMO excessive's is kinda a joke(very expensive one).. Pretty much every dyno sheet i have seen from them takes away all of the low/mid range a ka is great for and you get mild gains up top. From what i have seen a stock Ka's manifold is great(IMO the best) for anything less than 500 hp, however this is in turbocharged form. Im not really sure about N/A. The long runners creates a high velocity charge air which is going to be great for Tq.

I know what kit you have. IMO you need to rev that thing out to at least 8500 to get your moneys worth. Most people assume that because its a 'stroker' kit that it will lower the rev limit, however this isnt exactly true. With the beefy rods and only slight increase in stroke, the FCW crank almost demands that you rev it out. N/A power is all about revs.

Bigvinnie



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929 posts
240sx/KA24de 1991 coupe with installed OBX HLSD
Walnut Creek CA
4-7-2005

 « Re: (480sx)


Quote, originally posted by 480sx »
Never said that dyno tuning itself was abstract, just the number that you were left with was.

Depends on the dyno.....
I like to use the mustang dyno with the newest eddy program. Personally I find it to be pretty accurate and when you look at the cross over, it will try to calculate and more accurately detail where the true engine cross over should be at boreX stroke of an engine, (all engines rotate at different rates of speed so there is no way an engine truely has a cross over at 5200/5200 RPM).

Like I said 5200/5200 is a mathmatical formula but no engine do to engine displacement, BORE X STROKE will always fall at 5200/5200 cross over, all engines are different.

Now most dynos take a torque factor and multiply by it's RPM at 5200...
My Torque numbers seem pretty realistic for how pig rich my engine was at it's given RPM, which ius less than a stock KA, changing K value with a 12:6.1 A/F ratio put my KA at peek power at a higher RPM, it's really a simple calculation. Changing K value using an N60 for an N62 MAF plug in showed my relative torque numbers....
A KA can make peek power past 6000RPM, and I'm proof of it.

Theoretically dyno jets are over rated and inflate HP numbers, so do dyno paks. I like mustang dyno's because those systems inflate a larger degredation loss which would make it more realistic for real time driving conditions. Mustangs also use braking resistance to calculate those degredation losses.
I find any other dyno on the market to be over rated, and for years the people that sell the hype that dyno jets and dynopaks are accurate are selling the use of this equipment themselves.

Sure there could be an over inflation of dyno numbers from dynop to dyno like at about 3% but how much does that really matter to call it abstract. BTW these A/Fr's are pretty accurate, I used an LM-1..



Ajax

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870 posts
1991 240sx SE
Minneapolis MN
3-12-2003

 « Re: (480sx)


Quote, originally posted by 480sx »

I know what kit you have. IMO you need to rev that thing out to at least 8500 to get your moneys worth. Most people assume that because its a 'stroker' kit that it will lower the rev limit, however this isnt exactly true. With the beefy rods and only slight increase in stroke, the FCW crank almost demands that you rev it out. N/A power is all about revs.

I will once I get everything squared away. First it still needs to be tuned to Minnesota's 92 octane (currently tuned on Chicago 93 and using octane booster with every tank- its not a dd anyway now, so its not too expensive), but I figured why bother doing that before getting an intake manifold to really take advantage of the higher revs. Currently, the power still drops after 6500rpm or so- therefore not worth revving past it.

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