Question bout KA buildup??

[The Mic]

i heard about this about the ka build up.

"problem with ka buildup...to get 250hp your gonna have to run high octane fuel not the one u can get at gas station like 95 octane or else your engine will blow thats another prob with na , ur gonna have to buy 100 octane racing fuel from like 76because u cant get 95"

can anyone confirm this if this is true? ty

[Daunttless]

Well, it depends on how you do it, super high compression, yes, you'll need higher octane fuel, if you go the turbo route you can use premium. : )

[The Mic]

Hey guys, i want to know which u guys think i should go with bc im thinking about road racing. should i do a Ka buildup (NA) or an SR swap. Also im on a budget on about $5000. ty guys

[red240ne]

well, it's going to cost more than 5000 to beef up the KA to 250hp. go with the s14 sr20det. turbo is the only option IMO.

[nnkfws333]

:Werd You can get an engine for about $2500 if your lucky and then get a lot of upgrades that can definitely be fast. I believe Ken's SR (Enjuku) pulled just about 400 hp at the dyno with stock internals (i.e. pistons, etc.). Just pretty much get an intercooler, larger turbo, bigger fuel pump/injectors, etc. oh yeah lots of patience and money!

[red240ne]

well, if you're going to want a larger turbo, then don't even bother with the s13 SR. might as well go s14.

[The Mic]

how much would the sr20det engine and labor cost guys? I think the engine is(redtop) about 2500 and the labor is like 1500 but im not sure.

[Daunttless]

Depends on where you get it from, from me, that would be the cost of install, engine, intake, exhaust, downpipe, and fuel pump. : ) From others, it might just be the engine and install. : ) So it entirely depends on where you go.

[Redline240]

well, if you're going to want a larger turbo, then don't even bother with the s13 SR. might as well go s14.

Why?

[S14Zilvia]

well, if you're going to want a larger turbo, then don't even bother with the s13 SR. might as well go s14.

What exactly are you talking about?

[BuudWeizErr]

well, if you're going to want a larger turbo, then don't even bother with the s13 SR. might as well go s14.

WTF?

[nnkfws333]

I think he is referring to the S14 SR's having a T28 partial ball bearing and the S13 SR's having a T25 turbo. I believe that the S13 SR's have more aftermarket support and easier than on the S14 motor. Correct me anyone if Im wrong.

[S14Zilvia]

Obviously, but if you're going for big power the T28 isn't gonna do it.

This guy's saying if you plan on upgrading the turbo.... if you're gonna do that why not get the s13 for less money and buy a bigger turbo than you'd get for putting that money into the s14 sr and still just having the t28?

[SilviaLuvr]

question...the S15SR has a piss poor transmission from what i hear...there also isn't that many after market parts for it and they also can't hold that much HP well what about the Siganl S15 SR that thing cares 700hp...yeah i know that it is and SR22 but what is the big different betwen the SR20 and the SR22

[apzak]

Is there some place without a bias view on the whole KA-T vs SR question? I'm in the same situation and each website I visit or forum I view is so bias I can't make up my mind. Kinda like the situation I was in before I got my V1... it was V1 vs 8500.. both great but what's right for me?

[lateralmotion]

an sr22 is just an sr20 that's been bored out so that instead of displacing about 1998cc it's about 2200cc. simple as that. and S15's do NOT have piss poor trannies. i've seen this subject get way out of hand with my own eyes, and it's not like they are pieces of s*** it's just that there are 7 gears(6 forward) where in the other transmission there are 6(5 forward). it's not like too many stock transmissions are anything to really talk about anyways.

[sts76]

S13guy. By road racing do you mean illegal street racing or road racing as in race track SCCA? If you are doing sanctioned events read the rulebook. Turbos are no-no.

[C-Kwik]

well, it's going to cost more than 5000 to beef up the KA to 250hp. go with the s14 sr20det. turbo is the only option IMO.

How's that? The NSport Kit retails at $3995 per Nsport's site. This will get you pretty close to 250 at the wheels. It should get you to 250 at the crank no problem. Add 370 injectors and a fuel controller or a JWT ECU and 260 WHP is easily possible. All you would really need to up the boost is to change the wastegate spring.With this you'ld be looking at close to $5000 yes, but you can probably find the kit cheaper through a dealer than through NSport.

And if you wanted, you could build a kit for cheaper or you could even do a budget kit for much less.

[bruinbear714]

For autocrossing, you're going to want a naturally aspirated engine because the engine response will be somewhat linear. Running a turbo in autocrossing will be bad because of the unexpected response when the boost kicks in.

[C-Kwik]

Depends on the size of the turbo and the overall design. Particularly in where the boost threshold is. Boost tends to be easy to control once you get in the RPM range where boost occurs. But it is much easier to slip up. But it is totally worth it.

[The Mic]

S13guy. By road racing do you mean illegal street racing or road racing as in race track SCCA? If you are doing sanctioned events read the rulebook. Turbos are no-no.

im thinkining ill do illegal road then go to scca. but i didnt know that turbos were illegal in the scca.

[The Mic]

For autocrossing, you're going to want a naturally aspirated engine because the engine response will be somewhat linear. Running a turbo in autocrossing will be bad because of the unexpected response when the boost kicks in.

Yeah ive heard bc of NA's ability to compesate, its able to corner a lot better than turbo bc of turbolag. Turbo, once it reaches its peak, after the drop off point, its takes time for it to regain its speed. So im still not sure wheter to go NA with KA or Turbo with SR. Having in mind the trouble ill have with smogging my car and other things.

[apzak]

sts76 - You have a Porsche 911T? Same here except mine is a targa from 1960s so I got the 2.0L engine. I got a short somewhere so my battery is always dead, and I have to get it road worthy so I never got to drive it hard. how's it compare to the 240sx?

S13GUY - you got aim or email? i cant sent email to you through the board

[sts76]

911 vs. 240SX? 240 parts are much cheaper, has A/C, stable at 120MPH, rat's nest of wires, vacuum lines and plumbing, a little slower, see them everywhere and little character.

911 parts are expen$ive, no A/C or heat, a bit scary over 110MPH, simple to work on, quick, sounds great, special car and a blast to drive.

[The Mic]

my aim is deathscyth01g2

[240sxrunner]

What do the stock S13 SR and a Stock S14 run in the quarter. Arnt the S13 and the S14 SRs the identical engine but with different turbos??? i dont know much about the SRs????

[Repo Man]

What do the stock S13 SR and a Stock S14 run in the quarter. Arnt the S13 and the S14 SRs the identical engine but with different turbos??? i dont know much about the SRs????

Tons of good info in the SR20DET forum of this board. Head over there and read the threads and use the search function and be amazed at the knowledge...

[cnichols]

an sr22 is just an sr20 that's been bored out so that instead of displacing about 1998cc it's about 2200cc. simple as that. and S15's do NOT have piss poor trannies. i've seen this subject get way out of hand with my own eyes, and it's not like they are pieces of s*** it's just that there are 7 gears(6 forward) where in the other transmission there are 6(5 forward). it's not like too many stock transmissions are anything to really talk about anyways.

It's actually not as simple as that...the SR22 is a stroker motor...meaning it's stroked. It may be bored out as well, I don't know.

[Repo Man]

It's actually not as simple as that...the SR22 is a stroker motor...meaning it's stroked. It may be bored out as well, I don't know.

Correct. To gain an additional ten percent displacement one would have to add a stroker crank. For those that don't know, a stroker crank increases displacement by lengthening the stroke of the piston in the cylinder. Thus "stroking" the motor.

An overbore doesn't provide much gain in displacement and can be very difficult with aluminum blocks due to the cylinder sleeves. It was thought for quite a while that the LS1 engines couldn't be bored much because of this very reason, but there are now 427ci LS1's out there that have been bored and stroked. Don't race domestic guys with an engine such as this. Just don't.

[Daunttless]

The SR22 is bored as well, you lose revability but gain lower end torque. Whether or not it's worth purchasing is up to the individual to decide, I personally wouldn't do it, the .2 liters of displacement is not worth the lost redline when you can just do a KA turbo if you want some torque, or you can run higher octane fuel and more boost with the SR20. : )