OK. I am Enthalpy

I have tuned a few SR's to 400 or close to it.

In my experience the SR heads do not need any porting or polishing to get to 400 HP. they have very good combustion chamber design as well as a very nice intake port design. this of course applies to S-13 SR motors. S-14 and S-15 motors have a design change which makes them less desierable for all out power.

You can get there on a stock block provided you get the right parts. greddy intake manifold will be helpful, but you loose power and TQ below 6000 RPM, but it pays for itself on the top end. cams will allow you to do it alot easier and on less boost. cam selection is critical.

perhaps the most critical things are the turbo manifold and turbo. for most power goals under 500 Hp i reccomend the following turbo

T3/T04E
T04E 50 trim compressor in .60 A/R housing
oil and water cooled center section, with 360 Degree thrust bearing.
T3 Stage 3 wheel in a .63 A/R 4 bolt outlet housing.

the hardest part of that turbo combination it the exhaust housing. most places will try to spec the old ford style 5 bolt outlet housing. these do not flow as well as the new 4 bolt outlet housings. i have a supplier which will have these housings in early january, and can make this turbo for around $700 using exclusively garrett parts. contact me for details. 57 trims are a crap wheel for SR's they dont work well, and are inefficeint comapred to 50 trim. T66 is way to big. Greddy's T67 is actually a bit smaller than the turbo i specified.

turbo manifold selection can also make or break your project. there are a few good stainless steel equal length manifolds on the market that will help you get there. I reccomend the Enjuku Racing Manifold. all the stainless manifolds will be over $800 so get ready to spend some $$. a log style manifold is a cheaper option, but they do not flow as well on the top end.

Tuning will also be crucial for your quest. I can custom program ECU's in house so dont even bother calling jim wolf. all my programs are tuned for your car on our dyno @ Secret Services, they are not the off the shelf variety.

go with 750cc injectors or soemthign close to that (72 lb, 740cc...etc..) 550's can get you there, but you will be on the ragged edge (98% duty cycle). 750's are virtually the same price, so they are worth it if you are actually shooting for 400 hp.

If you have any questions feel free to hit me up on AIM or send me a private message.

good luck,
Scott

 

Actually i was outflowing the cam most likely. at a given boost pressure, the turbo could only push a certain amount of air through the valve event. a bigger cam will yeild a longer valve event for a given RPM (duration) as well as a valve event of a greater magnitude (lift). thus alling the turbo to push more air into the motor. the head was probably not the restriction. we will find out soon enough.

Scott

 

I do not have a car yet, just sold my car, so have money for car and swap, been reading a lot about the sr swap plus I love the way 90-94 240's look, and I wanted to make to motor fast. Anyone know anyone with a 240 for sell?

thanks for all advice guys
trully helpful

One more question, I have seen a couple of different lift cams(exhaust and intake) and was wondering what would be the best cam for the hp that I want to acheive. I would love for the beast(sr) to sound like its gonna stall because of high lift cam(lol)

any advice is helpfull
thanks

 

its the duration of the cam that gives it the 8strok'ing idle that youre describing.
but yeah, if youre going for that sound, a set of hks 272's will get you there, and also give you the power you desire.

a high lift stage II 264 would probably be more realistic however to get you where you want to be.

i know where you can get 240s at

 

That is a good lift for the performance that I desire?

where can I get 240's you say?

thanks man
ben

 

i know of two for sale right now that are perfect candidats for srswap

 

where are these cars, I am in wesconsin right now until monday but I have money to buy car right now. there are a couple of coupes in the autotrader that I was lookin at but hadnt looked yet until I get back.

why do you say they are perfect candidates?

thanks man
ben

 

At what PSI did this happen?
Thank you for your help.

 

a billion psi, enough to bring this post back from the grave

will the zombies ever stop coming?

 

holy shit.... super dig, almost 8 year old thread!!!

good info none the less...