good power and acceleration...
 

Looking for some advise on parts:

I currently have a 2002 Prodrive STi, with performance friction brakes and BC suspension.

I am currently collecting parts to for engine mods....aim is decent power and good acceleration - car is going to become a track day toy. Stripping the weight will come later :)

Parts to collect is:
Fuel pump
Fuel FPR
Turbo
FMIC

I have 650cc injectors and an induction kit. Looking at an ECUTek remap once all is fitted.

The question is what turbo(s) are around for power and acceleration?

Should I be looking at changing anything or all of the exhaust? Or is the prodrive good enough? Anything else, that I should be considering changing at the same time? Clutch? Recommendations?

Thanks

650cc injectors are good for around 460+ bhp, I think.

So perhaps a MD321T or SC46 Billet or S206? Great spooling turbos for the 450bhp or so that they can make on V-Power (S206 can go to 500+ bhp too... ;))

Can the OEM MAF/MAP sensor handle the airflow/required boost target, respectively, for 450+ bhp, though?

Of course you will have to consider a 6sp, PPG or Scooby Clinic box (or does your MY STi already have the 6sp? :wonder:)

I am just reading this thread about the S206:
https://www.scoobynet.com/trader-ann...206-turbo.html :)

No idea about the MAF/MAP sensor so good point - something I need to look into!

Already have a 6spd :) its a 2002 model...

Joz it's a New-Age STI they all have six speed boxes.... MAF will be fine.

My OEM clutch gave up at 360 ft.lb.s....

You need an un-equal length tubular manifold, roller bearing turbo, and if it is a track toy 3" decat'd exhaust system.

Should get you to around 400 bhp. For much more a FMIC will be advisable...

IMHO

dunx

P.S. I used an MD321H, but as mentioned there are several newer items out now.

figured that the OEM clutch would not last :( typical!

FMIC is on the list and the 3" decat is about to be added, thanks!

Will have a look/search for that turbo as well, thanks.

Thought so, although was not 100% sure lol ;) Ta. I'm a 'Classic' man, me. :lol1:


BTW graham, beware that the S206 is not a 'true' std position turbo - needs its bespoke d/p elbow and the comp cover is, in effect, rotated 180deg and 'mirrored' (from memory). So will have to modify the FMIC's turbo-IC 'hot-side' pipework/hoses...

Good point as well... all adds to the cost, so will have to add it in and then compare. For now, I think I will stick to standard position turbos... while I research.

Yeah, I'd defo stick to std pos tubs. Also, because the S206 can flow 500+ bhp, then perhaps it might be just that bit laggier than the other two.

Maybe.

graham, see posts #324 and #325!!! :-

https://www.scoobynet.com/752989-typ...achine-11.html

I think you'll be chomping after a MD321T! :lol1:

was thinking along those lines, just need to continue reading that thread and see... if its a fair bit over the number I am thinking about, so might be a bit of a push.

looks good!!

MAP sensor will cope with the 450 level
MAF sensor will also cope with that power level if you fit a larger diameter MAf housing as the std maf housing causes the maf to max its voltage at around 420-430 bhp.

MD321T is proven time and again to make the power but is also responsive and it is this responsiveness that makes the T equipped cars ultimately quicker through the rev range.

For my road car, the thinking was ( 2008 ) that I would use the smallest turbo to get me close to 400bhp.

For a track toy the MD321T is going to give greater figures, but at the expense of a wee bit more lag, IMHO.

Obviously the newer turbos MAY be even better, but don't fit a 500 bhp capable turbo if you only expect to "need" 450 bhp.

HTH

dunx

P.S. 450 bhp is around the maximum these engines can handle without up-rated internals.

Thanks for this! Its the responsiveness that I am after....

Completely agree, smallest turbo to get to the 430-450 mark is what I am ultimately looking at. Dont want to rebuild the engine right now, but will do it eventually.

430-450 is more than enough for me............ for now :D I think its a decent number to start with.