The Car in question is a 1996 version 2 sti...
I am doing all the work myself besides from mapping obviously hopefully Simon from JGM can help me when i get to that stage

Right well the spec im going for is..
Forged internals semi closed deck with version 3 heads
GT35r Twisted turbo with external wastegate and screamer pipe setup
Tubular exhaust manifold
740cc injctors with parrallel setup
Adjustable fuel reg
255lph fuel pump
Oil catch
6 speed conversion
Running with a simtek/gems or apexi
(feel free to comment on this spec and suggestions welcome )

Right.. now i was wondering if anyone with a similar spec or have done this before could help answer a few questions i have...

Q1. When i go mafless i was hoping to run a straight silcone hose from the turbo to the airfilter but will this need to have a port for the idle control valve? or can i route this elsewhere?

Q2. Also when running mafless is a 2bar map sensor enough for my spec when aiming for higher boost?

Q3. The engine i have is basically brand new and still needs running in so will i have to fit a smaller turbo for running in period even though ill be keeping revs below 3k/4k?

Q4. Would the standard ecu be ok to run the engine in untill i get a hold of a mappable ecu?

Q5. And finally, is there anything else i need to be aware of with this kind of build that i may have missed etc?

Thank you in advance and please dont pick on me that much if i seem like fool

Alan

 

you might want some good suspension and some big old brakes and the sim tec would be beter for that power, but thats some thing you should ask JGM if he is doing your mapping

 

oh yeah dont worry about that i have that covered only worried about engine side of the build thanks anyway

 

Mafless Ecu can run with a crankcase breather filter attached directly to the ISCV

3 Bar sensor to allow boost levels up to 2 Bar

Whatever turbo you are using will be fine to run in on - just keep the boost relatively low

If you use the standard fuel injectors, then you could run in a motor of the same capacity, off boost. - Personally i would write a running in map that will allow you to safely rev the engine into positive boost, for ring sealing purposes.


If you only want to acheive 450/450, it's a bit overkill to run a 35r with external gate - This sort of power level can be easily acheived on a MD321 Series turbo, in the standard location

 

what fiestaboy said..

silly to run that large a turbo.. gt35r with 0.82 exhaust housing I mapped one to 658bhp.. I think (know) it maybe way to laggy for 450.. especially as I assume 2litre?

SimTek I supply with a 3bar map sensor and is the ideal solution or syvecs.. depending on your budget.

Simon

 

Oh ok thanks for the advice Richard
This is what im talking about i know what i have is good parts its just i was lucky to purchase them at the price i was offered so i grab it before it was gone.

I happy to go more bhp with my gt35r as long as my forged semi closed 2.5 can take it. The internals on this are Weisco pistons, Eagle rods, New Crank, ACL bearings, ARC headbolts and Modified oil pump. Heads are off a v3 sti and have been modified to suit 2.5 block and have also been ported. I was told it was built by the same guy who built your engine Simon? But then I dont believe everything im told... sometimes lol

How much for the Simtek and mapping with 3br sensor then Simon? Budget is a little tight but i guess if the gt35r is to big for what my engine can handle then i guess ill have some spare selling it on :/

Thanks Guys

 

no the block cannot take it.. well some get away with it but generally 450 reliable.
Same imho with standard sti3 heads.. you would do better to sell the turbo on and buy a smaller one.

Price on my website www.jollygreenmonster.co.uk for SimTek on a classic and I don't charge for a 3bar map sensor on the 96 if required.

which engine? lol Was this Andy's old engine? in which case yes Mike put it together...

Simon