ka24de N/A!

[GTLegend]

lol i know the KA isn't gonna make big whp n/a. what 4cyl. does? the ka does have a good amount of torque! the s2000 and the TSX don't make much whp, and they don't have a lot of torque(stock). my cousin had his tsx dyno and it made 178whp/161ftlb with intake and exhaust.

i have a 1995 ka24de i'm rebuilding. here is my plan. stock rebuild with felpro gasket set, oil pump, timing chain ect. but i'm going to add ka24e sohc postions from a 1990', with BC v2 cams, 17lb. flywheel, headers, Hiflow cat, exhaust, intake, some head poolishing done by me, and jwt ecu flash. i might get the BC valve spring kit but i donno if its worth it?

i hope to make 170-180whpi'm not looking for big HP.(cuz i won't get it) i just want a well balnced car. with a well balanced suspension. i will try to reduce weight as puch as possible without spending too much. i have the spare, rear/passanger seat/ and some panals removed.

i don't see why i can't have fun without 300+ hp! too many people are worried about big HP and not about the driving experiance..

any comment/suggestion are welcome!

[seang]

I agree with the point that hp numbers don't tell the story all by themselves, its like giant subwoofers with tons of power that just aren't practical except to their fiendish owners and likeminded admirers. I believe you can get to 165whp with about 1000 dollar drop. Any more power here is gonna cost thousands more. Modesty is the key here, boosted or not.
Modified by seang at 5:07 PM 9/11/2009

[seang]

Feel free to puruse this seemingly endless list of threads at your leisure, you aren't the first one who asked this question, and they go back a few years. Some threads are better than others, though.

Here's one of my favorites : zer...ifold

[GTLegend]

my AC in the 240 dose not work, so i'm thinking of taking it off along with the clutchfan and go with an e-fan.

[Shabbernigdo]

my AC in the 240 dose not work, so i'm thinking of taking it off along with the clutchfan and go with an e-fan.

the ac pump and that dam bracket it uses is a pretty decent chunck of weight.

not to mention all the accociated alum hoses and condencer core. etc etc

[Bigvinnie]

i have a 1995 ka24de i'm rebuilding. here is my plan. stock rebuild with felpro gasket set, oil pump, timing chain ect. but i'm going to add ka24e sohc postions from a 1990', with BC v2 cams, 17lb. flywheel, headers, Hiflow cat, exhaust, intake, some head poolishing done by me, and jwt ecu flash. i might get the BC valve spring kit but i donno if its worth it?

any comment/suggestion are welcome!

You would yield more power, milling the head down and head welding the head.The design of the DOHC piston was to improve swirl and atomization. Once the SOHC piston is used swirl is decreased.

The reason why a flat SOHC piston works well in a SOHC engine is because the head is hemispherical.

The reason why a curved DOHC piston works well in the DOHC engine is because the head is pentroof.

Just a suggestion.

[GTLegend]

i'm on a budget dude.

sohc pistons are pretty cheap. angle valve job may help.

gotta sell some 4ag parts first.

[liquid_cool]

i'm on a budget dude.

sohc pistons are pretty cheap. angle valve job may help.

gotta sell some 4ag parts first.

keep your 315cc 4age injectors..a cheep and easy ebay mod is a topfeed convertion..just so happens a 315cc injector works perfect for it..and there denso style too!

as for a NA build..bigvinny is correct man...ya you get a higher CR with the E pistons..but you gain nothing in really in the way of hp gain for that mod...if you want to do it rite..take the time..and save for some pistons..there not that expencive or out of reach..if you search the forums..you may come up with a bargain for some 10.5:1's...and that would make a big difference in your NA build man...you can if ya wanted a true high CR motor..deck the head..deck the block..add high CR pistons..clearence the valves..and end up somewhere around a heart pumping 13.5:1 cr....as for the duel spring kit from BC...i recomend that if you plan on revening the engine even to a modestly high rpm with a closer tolorence for your valve clearence..at higher RPM..with standard springs..you risk float and mashing those valves into the top of the pistons..with a duel spring set up..the possibility of that is verry small..this will allso let you rev a little higher with out being scared of disinigration:)

what ever you decide..good luck

[Bigvinnie]

I've never seen any high yield in power using the SOHC pistons on a ka24de. Only difference is higher octane would need to be used because of the lack of efficiency, and it's volatility to knock and ping.Sohc pistons do work, but in most engine set ups that it has worked to an advantage is for engines using E85, SOHC pistons do not work good for street gasoline or racing gasoline using the DE head. Gasoline does not mix well with this piston.Wiseco and the super tech pistons are a good piston to use for high compression, I prefer the super tech because of its super thick ring land, it will take a lot of abuse.3 angle valve jobs on KA heads do not yield that much power, so relative to the price it isn't really worth it unless you are looking into a 500HP+ monster. These valves are already designed to be efficient up to 400 HP. This same valve design is also used on the Godzilla of engines the RB, as well as the CA, SR, and VG. Nissan uses a pretty good valve, so a 3 angle job would be refining the edging and the seat to the head. Just a personal opinion dealing with this head type. I would focus more on porting the KA head than offering a 3 angle valve job, so its flow would be more up to par with the sr head.

the KA is known for being an anemic engine. It just needs to be opened up at all ends with a cleaned up intake mani, ported intake ports to the head, and a header. then it gets beastly.

Good advise on the 315 cc injectors, there almost a good drop in with the project silvia fuel rail. When bumping up the compression 10.5:1~11.1:1CR it wouldn't need any ecu tuning.
Modified by Bigvinnie at 2:10 PM 9/24/2009

[GTLegend]

ohhhh... you again!! god sure did bless you with a lot of knowledge bigbinnie. glad to see your putting it to good use! but i decided to go ka-t, but picked up a gt25 from my buddy . going with stock pistons and stock boost pressure. good thing i'm gonna say away from all that "knocking and pinging"!!! hahahaha thanks for all the useless advice! /:>)

my AE86 4AGE injectors are from the red top hi-comp motor and they are 235cc from a 1.6L toyota!(if your interested you can by my HKS 4age cam off me on ebay). then i can get a turbo mani and downpipe.

i was gonna do the sohc pistons because my co-worker used them in his NA KA build and made 176whp (w/104 octane) with just cams+bolt-ons, and tuned ecu. and he drives it everyday no prob. spent less than a grand! the car revs and pulls like a champ, def. noticeable performance increase over my stock KA. he uses 93 oct. daily and there is to pinging or knocking and fuel consumption is the same. the only thing i would change are the valve springs.

[Bigvinnie]

ohhhh... you again!! god sure did bless you with a lot of knowledge bigbinnie. glad to see your putting it to good use! but i decided to go ka-t, but picked up a gt25 from my buddy . going with stock pistons and stock boost pressure. good thing i'm gonna say away from all that "knocking and pinging"!!! hahahaha thanks for all the useless advice! /:>)

One that talks crap actually knows nothing. If you had anything fact base you wouldn't be so hard gay, so I'm niot offendend by your ill information....

my AE86 4AGE injectors are from the red top hi-comp motor and they are 235cc from a 1.6L toyota!(if your interested you can by my HKS 4age cam off me on ebay). then i can get a turbo mani and downpipe.

No one wants your 4age crap just like you don't want your 4age crap, it's like a little high rev honda engine. Go get a real job and get that mani and down pipe you want so bad.....

i was gonna do the sohc pistons because my co-worker used them in his NA KA build and made 176whp (w/104 octane) with just cams+bolt-ons, and tuned ecu.

OOOOHHHH I'm creaming in my pants over those super weak sauce numbers. I'm about to pull off those same numbers with stock compression and a NISTUNE. So your buddy wasted his time to make 176WHP with SOHC pistons, and 104 octane. I'm making 162WHP to the wheels on 95 octane, and stock compression, no ecu tune and a weak SAFC. Higher octane would of yielded bigger whp numbers than using teh 95octane, so relative to your buddy installing sohc pistons he probably only yielded 5 maybe 8 more whp than guys using stock compression. Pure weak sauce. seams like you and your butt buddy are part of that elite group of dumb a$$ that can't harness High compression engine power, wonder why?
Modified by Bigvinnie at 7:41 AM 9/25/2009

[liquid_cool]

ohhhh... you again!! god sure did bless you with a lot of knowledge bigbinnie. glad to see your putting it to good use! but i decided to go ka-t, but picked up a gt25 from my buddy . going with stock pistons and stock boost pressure. good thing i'm gonna say away from all that "knocking and pinging"!!! hahahaha thanks for all the useless advice! /:>)

my AE86 4AGE injectors are from the red top hi-comp motor and they are 235cc from a 1.6L toyota!(if your interested you can by my HKS 4age cam off me on ebay). then i can get a turbo mani and downpipe.

i was gonna do the sohc pistons because my co-worker used them in his NA KA build and made 176whp (w/104 octane) with just cams+bolt-ons, and tuned ecu. and he drives it everyday no prob. spent less than a grand! the car revs and pulls like a champ, def. noticeable performance increase over my stock KA. he uses 93 oct. daily and there is to pinging or knocking and fuel consumption is the same. the only thing i would change are the valve springs.

WHO dude..settle down..bigvinnie was tryin to help ya out!...Bigvinny,Angyhippy,Vegascorbin,Razi,and a few others i should mention but im bad with names..are dayly participants helping guys like you...you have no rite to treat people on this forum like that...this is not prostreet,vegasdrift,or the honda forums..this is nicco..we are family..you need to recant your comment..or im afraid you will be held accountable for your comments..

Since you were going boost..i was gona add a word of advice for ya for BIG gains in HP..but ill hold that back now..as i can see how you get treated for good advice..

[GTLegend]

liquid cool. you seem like a helpful and cool guy. you can have a conversation and you don't shut ppl down who question or challenge your suggestions.

where as "big vinnie" takes everything to heart, and defends everything he knows as unquestionable and superiour. i was just poke'n at bigvinnie lol to let him know that its ok if people wanna believe what they want, you can't change everyone mind. i actually support a few of his ideas but he has tries to disprove everything i mentioned. and i know i'm not a expert engine builder ot race engineer, other ppl need to realize that they aren't either.

one thing i did notice on nissan forum is that a lot of the members are obsested with "more". more power, more tires, more boost, more bore. that dosen't mean that system will be more effective. many times they detune the motor, or reduce the efficiency rating.

i think i kinda understand the upper limits of the KA motor, and it dosen't seem to be a motor nissan designed to be a high output, race derived piece of machine. even though it is underrated. most of the stock components seem addiquite to support the motor close to the upper limit. heavy N/A modifications don't seems correspond to the HP outputs. (i knew that since day 1).

blah.. blah...anyway i'm not a horsepower freak, in a quest to gain HP at any extent. i'm more in search of a nicely seasoned vehicle.

if i offened you liquid cool then i am at fault, and i appologize.

thanks bigvinnie i appreciate all your wonderful help and input! you help me understand things in a way that engineering books can't!

[GTLegend]

One that talks crap actually knows nothing.

Modified by Bigvinnie at 7:41 AM 9/25/2009

you are 100% right

and my ae86 isn't a high performance race car, its just a piece of s*** fun car to drive no engine mod, just suspension and its brings a smile every time i drive. we are talking aprx. 90whp here!! yea!!!

[Bigvinnie]

know i'm not a expert engine builder ot race engineer, other ppl need to realize that they aren't either.

one thing i did notice on nissan forum is that a lot of the members are obsested with "more". more power, more tires, more boost, more bore. that dosen't mean that system will be more effective. many times they detune the motor, or reduce the efficiency rating.

your all wrong dude. I have 10 years total, and 5years of serious study on this engine. Your missing the key element to power which is efficiency and unfortunately your to young to understand this. Engine ve at 100% obtainable are what people try to reach, not the theory of power equals a bigger d#ck so to speak. With smog standards most engines fall within the realm of 75% efficiency, especially when it was the era of OBD1, and the beginning of OBD2. You should ask your self what is the best affordable way to harness power and strive for 100% VE.

I'm against people ripping off egr valves asssuming that it makes more power when actually it kills the air we breath and causes acid rain, it's worse for our children namely mine.

When I suggest to you not to use the sohc piston it is just for that reason that it lowers engine ve when compared to the stock dohc piston.

I've been in the Nissan game for years. Read books for years, took auto classes in JR college. I've earned my general class B license, and own a porting shop on the side. I have an extensive career and would rather not ruin the reputation I have with crap jargon like I have in the past. 2 years ago people couldn't take me seriously, and now my whole path and direction has changed for that reason.

You can take what I say to heart or keep ignoring and making fun of something you simply don't understand yet.


Modified by Bigvinnie at 6:55 PM 9/25/2009

[GTLegend]

congrats with your high achievement career! i'm proud of you man!and 15 year is a lot, and it seems like you sent more years studying this engine, than nissan did when they developed it..good for your and i hope you can really make a big difference. i'm not going to argue with you or your buddies about the KA24de motor. you'all are far superiour!

i have zero years under my belt ,i don't have any years in any auto manufactures game. and i don't own a shop.... BUT... i do know that the bore and stroke: 89.0, 96.0 mm so on and ect. i'm sure you know that too.. but a BASIC understanding vibrations, dynamics, resonance and 'stuff" lol gives me a little understanding of power, so on and so fourth ..... you know what,,, your way smarter than anyone i know, you need to go work for nissan and help them out!

go out there and be somebody bro....

don't waste your time trying to get me to understand anything. ahaha go build your 100% efficient motor!..

godspeed!

and i did ask myself whats the bets affordable way to harness power, then god came down and told me not to listen to you! sorry.

i'm am really sorry i have nothing to prove i'm just dumb..

[GTLegend]

please let this be the last post i'm tired, and you have an ego so i'm guess its gonna go on and on, by yourself cuz i'm done with you and you 1million year experience with building efficient motors

[Bigvinnie]

please let this be the last post i'm tired, and you have an ego so i'm guess its gonna go on and on, by yourself cuz i'm done with you and you 1million year experience with building efficient motors

HAHAHa well I guess we are in agreement. Your attitude sucks. young Noobie One.

[GTLegend]

your lucky that i don't take you seriously, i was gonna tear you a new one..

so when is your interview with Ferrari, Nissan, or Ford you gotta go share your knowledge with them and they'll hire you in the blink of an eye!! go for it big guy!!

you might be like the next Henry Ford, or Gordon Murray! hahahhaha

btw you should change your name to Mr. race engineer, or expert at everything, something along those lines

[Bigvinnie]

your lucky that i don't take you seriously, i was gonna tear you a new one..

HAHAHAHAHAThis is great man. I hope this venting makes you feel special.

[sinisterminister]

I don't know what kind of budget you're running. But here is a list of n/a parts that I have going in to my '95.

- I/H/E- EGR/Emissions removed- 11 lbs flywheel- electric fans- N60/N62 MAF- Ported Intake Manifold- Ported Throttle Body- Lightweight Driveshaft- Tune w/ SAFC (at least)

Parts are being put on as we speak. Dyno should be available in a few weeks. You could prob pick all that stuff up for under $2k

How come you're acting like an a** to Vinnie? He's been in the KA game for a while here, and has quite a bit of experience.

[TrukillaS14]

Damn it Vinnie Can I just give you the money to build my 240sx lol I'm taking classes for Auto at JR College so my 240sx is my project =] I'll be askin u alot for awhile u kno lol