300 HORSEPOWER?

[TURBOHHH]

WHATS UP EVERYBODY! I WAS WONDERING HOW EASY IT IS TO GET 300 HORSE POWER OUT OF AN SR20DET. I HAVE THE STOCK T25, AND I WAS WONDERING IF ITS POSSIBLE OR WHATS THE MOST I CAN GET OUT OF IT? I JUST GOT IT IN MY 240. I HAVE THE BASIC UPGRADES RIGHT NOW. FRONT MOUNT INTERCOOLER, METAL HEADGASKET, 3 INCH TURBO BACK EXHAUST, FUEL PRESSURE REGULATOR, WALBRO 255. HAVENT BEEN TO DYNO YET, BUT JUST WONDERING WHAT YOU GUYS ARE DOIN TO GET MORE HORSEPOWER WITHOUT CHANGING THE TURBO.

[SuperScooby]

hi there

well from what i've read in the past, the stock T25 is only efficient up till about 13-14 PSI, which will probably net you around 250hp with those supporting mods

if you're aiming for 300hp, i'd recommend getting the T28 off the S15 sr20det and i *think* you'd have to upgrade the fuel system as well before you hit 300hp

i'm sure someone else can answer better, but this will give you an idea

[wildacexxx]

might want to do a z32 maf for good measure and a safc on top of that s15 t28. injectors will be needed to support the t28 at higher boost

[Dori Dori]

He'll NEED to do a MAF since the stock maf won't flow more than 230ish.

Larger injectors will also be needed, S15 injectors should suffice.

An ecu tune will get you closer to 300whp with less boost and a better timing curve than an SAFC.

[S13240]

Easy way is to upgrade the turbo, no other way around it unless you want to have a fully built motor with stock t25.

Oh btw, take it easy with the caps lock. Hurts my eyes reading it.

[teddy]

The biggest dyno I have seen out of a t25 was 280whp on an sr with the stock block, cams, intake manifold and some other bolt ons. I also believe this had to be a fluke or something bc that's a pretty big number for a t25. Plain and simple, easiest way to get 300 is to upgrade to a t28, get some bigger injectors and a rom tune.

[Nismo_Freak]

He'll NEED to do a MAF since the stock maf won't flow more than 230ish.

Larger injectors will also be needed, S15 injectors should suffice.

An ecu tune will get you closer to 300whp with less boost and a better timing curve than an SAFC.

Huh... the stock MAF will do 270whp or so before it hits 5 volts.

[hazw8st]

He'll have to tear down the block and install some low c/r pistons. he'll have to upgrade to at least a T28, cams 272 intake, 269 exhaust, megaquirt ECU or a Standalone ECU.

[wildacexxx]

He'll have to tear down the block and install some low c/r pistons. he'll have to upgrade to at least a T28, cams 272 intake, 269 exhaust, megaquirt ECU or a Standalone ECU.

this is wrong . u do not need a stand alone or cams or low compression pistons. t28, maf, injectors and a piggyback or rom tune THATS IT

[AmoebAssassin]

He'll have to tear down the block and install some low c/r pistons. he'll have to upgrade to at least a T28, cams 272 intake, 269 exhaust, megaquirt ECU or a Standalone ECU.

No. A stock block SR20 is easily capable of 300whp with a larger turbo and supporting fuel mods. Low C/R pistons are not necessary if all you're running is a t28.

[S13240]

Wildacexxx & AmoebAssassin: You guys need to pay attention a little bit better to what the original poster was asking. On stock t25, not t28. Anyone can do 300 whp with t28, but original poster is asking how to get 300 hp without changing turbo.

[wildacexxx]

Wildacexxx & AmoebAssassin: You guys need to pay attention a little bit better to what the original poster was asking. On stock t25, not t28. Anyone can do 300 whp with t28, but original poster is asking how to get 300 hp without changing turbo.

but we're telling him its not possible. besides the guy that we were correcting also said to change turbo. bottom line change the t25

[S13240]

Totally agreed, bigger turbo is a MUST!

[karmakaze]

i am still trying to figure out why he would want to try to get 300 out of the t25. i mean, if you have the money to get the other parts you would need, you can afford a t28.

[AmoebAssassin]

Wildacexxx & AmoebAssassin: You guys need to pay attention a little bit better to what the original poster was asking. On stock t25, not t28. Anyone can do 300 whp with t28, but original poster is asking how to get 300 hp without changing turbo.

I was correcting the man above me. My post was not about t25 vs. t28.

[TURBOHHH]

will the t28 bolt to everything i have now? do i need a new exhaust manifold? and will the stock intake manifold work?

[Nicksemianiw]

The exhaust mani will work it all works off a t25 flange. I think with the t28 you might have to bend some coolant lines but I could be wrong. The intake manifold is on the other side of the turbo manifold and has nothing to do with it. With a t28 or a t25 I STRONGLY advice against a greddy or knock off intake manifold since you will lose a lot of bottom end power and will only make better top end. Plus your car wont spool as quickly; if I am correct you’re trying to make a quick spooling 280-300 whp car right? You can stick with your t25 and maybe make 260-265whp max which is still a good number. To make the 280 mark try an s14 t28 it will work a bit better and still have minimal lag. And is less then half the price as a S15 T28.

Nick

P.S I am not to sure about this but if he wants to sacrifice low end power to make the 300whp mark with a s14 T28, could he do a greddy intake manifold? Make some more power if all he’s interested is in the number and not when he gets that number;)

[TURBOHHH]

awesome info man. no i am tring to make my sr faster. im not just going for a surtain number. and i know that the intake has nothing to do with it i just didnt know if it need to be upgraded also. but i didnt know that i would loose bottom end by doing that. i want to spool fast and have a strong bottom end. thanks for your info.

[Dori Dori]

Huh... the stock MAF will do 270whp or so before it hits 5 volts.

Never seen it happen...

[Beemen550]

Never seen it happen...

me either, or at least safely

anything over 12psi on my stock mafs would hit %100 on my safc 2 before 5500rpms, never seen exactly how many volts but im sure %100 is damn close to 5v

[Nismo_Freak]

What do you mean safely, and you've never seen it happen?

There must be at least 500 S13 SR's running stock MAF with over 230whp. Hell I've known people to run that setup for years without a problem.

[im two techno]

IM sure they are some sr motors running more than 12psi on a stock maf.But i would not recomend this to anyone ! unless you want to rebuild..

[CotBU]

1.Easy2a.possible yes probable no, etc rebuild and nos to much detail to list and or waste of time.2b. 250-275 before you generate nothing but heat, yes 275 while lying to the ecu with SAFC. not recommended, I'd tune for 240-245 or so. 250 is not far from 300 at all.

4. don't buy into all the info that's out there, but do take it in you'll need it.etc. z32 mafs is not helping a t25 under normal circumstances. So why install it now you need to controll it. SAFC? playing with the decel Air function with your BOV recirculated.... not cool.

5. Most people with sr still get smoked becuase of the speed limiter, call JWT or enthalpy, they'll give you a discount when you upgrade later DOHHHH! $500 for speed limiter romoved and rev limit raised is a good deal.....Right?yes there are other options but this is a high speed typing rant and i may have mispelled some crap.

ps don't critique my outline but think about it's content.

[S13240]

Been on 14 psi on both cars with srs and never had a problem. Previous car I had it on 15 psi for 5 yrs and now my current one is going up to almost a year.

[im two techno]

stock ecu ? are you using anything such as an safc?

[Dori Dori]

There must be at least 500 S13 SR's running stock MAF with over 230whp. Hell I've known people to run that setup for years without a problem.

I dyno'd almost 240 at 14psi on a stock turbo/maf/injecs. I said 230ish...meaning give or take. Because of climate changes, altitudes, and dyno variances; I'm not going to be specific about it. Take "ish" how you will. Regardless, you're saying 270whp is possible on a stock MAF. Show us.

FWIW, to the thread poster, a local buddy of mine hit a hair over 280whp on the stock t25 with a Power FC, Z32 MAF, 550cc's, and a Greddy intake manifold. We doubted his motor actually came with a stock turbo until we took it off and inspected it. Definitely stock T25.

[TURBOHHH]

well you are right about 250 being close to 300 very very true. but i have desided that the t28 is out. im just going to by a whole kit. besides im goin to spend the same money on a t28 and getting it tuned right and only makeing a little over 300 when i can buy a whole kit and make 400. makes sense to get a kit huh? well i really need to go to the dyno and see what im putting down know.

[im two techno]

well you are right about 250 being close to 300 very very true. but i have desided that the t28 is out. im just going to by a whole kit. besides im goin to spend the same money on a t28 and getting it tuned right and only makeing a little over 300 when i can buy a whole kit and make 400. makes sense to get a kit huh? well i really need to go to the dyno and see what im putting down know.

thats a good idea! Im also looking at kits..

[TURBOHHH]

yeah im lookin at the enjuku kit right now. i have heard good things about it. price is right also. good for about 350 to 370, and they will make the turbo anyway you want. might be something good. still have to have a fuel system and ecu though, which is not bad because you can pick what tune and stuff you want.

[Nismo_Freak]

I dyno'd almost 240 at 14psi on a stock turbo/maf/injecs. I said 230ish...meaning give or take. Because of climate changes, altitudes, and dyno variances; I'm not going to be specific about it. Take "ish" how you will. Regardless, you're saying 270whp is possible on a stock MAF. Show us.

This is from a guy with a larger T28:

Ok, i got my test pipe on and did 4 runs at the dyno today. My s-afc read that i didnt go above 80% airflow with my maf, and i tuned for about 11psi. I tuned the s-afc so that My air fuel goes inbetween 11.5 and 12. I made 252whp, and 229torque.

Horsepower can be gained from other sources than just compressor side airflow. It is possible to make ~270whp with a larger hotside on the turbo. It's all about engine VE.