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Old 10-10-2006, 07:41 PM   #1
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Basic Greddy installed last year with BIPES. Winter in Florida is project time, finally cools off enough to work on the car. What is the next step I should do to give it more boost. Intercooler, injectors, or both. Aith basic Greddy and intercooler (stripes) what could I safely bost to. Also I have the Greddy down pipe, Would I be better off first changing that for the Tony DP?

Thanks
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Old 10-10-2006, 07:49 PM   #2
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Basic Greddy installed last year with BIPES. Winter in Florida is project time, finally cools off enough to work on the car. What is the next step I should do to give it more boost. Intercooler, injectors, or both. Aith basic Greddy and intercooler (stripes) what could I safely bost to. Also I have the Greddy down pipe, Would I be better off first changing that for the Tony DP?

Thanks
DP DP DP swap that sucker out to a biggah one just member your exahust is only as big as the smallest pipe. new fuel pump if your still on the OEM one. if you still have the Vortech FMU you need a new disk for it or a fully adjustable one. Injectors i'd say pick up some 1.8L's for like uhh 40 bucks from someone around here. but with those things + a IC people say you are good for 7-10 PSI. (correct me if im wrong someone)
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Old 10-10-2006, 07:52 PM   #3
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get 2.5'' turbo back, bigger injectors, new disc for vortech, Stripes IC kit!!!!!!!
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Old 10-10-2006, 08:57 PM   #4
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Originally Posted by gman3 View Post
Basic Greddy installed last year with BIPES. Winter in Florida is project time, finally cools off enough to work on the car. What is the next step I should do to give it more boost. Intercooler, injectors, or both. Aith basic Greddy and intercooler (stripes) what could I safely bost to. Also I have the Greddy down pipe, Would I be better off first changing that for the Tony DP?

Thanks

First you'll need some sort of device to cool the intake temps be it intercooler, WI, etc.

Fuel pump needs to be upgraded (after 6psi or so).

Downpipe will probably need to be upgraded.

go up to 1.8 injectors (good for 210BHP @ 110psi of fuel).

Recalbrate your vortech unit.
To reach 8psi your desired rate might be:

Rise x Boost + Fuel Pressure at Transition = Fuel at Rail in Boost

8 x 8 + 48 = 112psi

So for 8psi you might consider a 8:1 rise


*EDIT*
I always forget to mention a clutch.

Last edited by Braineack; 10-10-2006 at 11:25 PM.
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Old 10-10-2006, 08:58 PM   #5
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How much are you wanting to spend? That's a big determining factor on what parts you should get. Another thing that you will want to get is one of Olderguys O2 clamps. Well worth the $.
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Old 10-10-2006, 11:19 PM   #6
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I second everything that was said previously... except to ask first if you've upgraded the clutch yet. ACT/RPS/SPEC, etc... The stock clutch barely handles base Greddy power... any more and you'll toast it within a week.
I looked back through some of your posts and I know you've got a Torsen and an Exhaust... put up some pics and make a profile in the vbGarage and list all your stuff!

The first thing is the intake charge. You've got to get the temps down before adding more boost. I'm going to be into my FMIC for a little over $300 all said and done, with quality parts and smooth routing. WI seems to be getting a lot of attention lately which will do the job. That group buy on DevilsOwn systems in the classifieds is hard not to consider, for less than my IC setup with more potential... with a MAP sensor, you're set for what the stock Greddy turbo can put out (just don't run out of fluid). A A/W intercooler is also an option if you've got the funds.

If you're going traditional A/A intercooler, decide if you're going to clock the turbo down or leave it as is... and what route your're going to take with piping (over, under, around).

Then in order:
Fuel pump/Injectors/AFPR/DFFR (all at the same time)... maybe $325 sourcing used parts.
DP: I went w/the best... new Begi divorced wastegate for $310 shipped w/T25 flange.

You could do things cheaper, but right there for the next "stage", you're looking at about $1000. If the plan is to do it over the winter, just buy one thing per month.

November: IC/WI= $300
December: X-Mas= Fueling= $325
January: DP= $300
February: Dyno tuning= $200... and something for the lady... better budget $400
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Old 10-10-2006, 11:24 PM   #7
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i agree with what others are saying, nothing else means much past 6psi unless you get an intercooler first or water injection
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Old 10-11-2006, 09:16 AM   #8
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Best bang for the buck next step in terms of power is a 2.5" (or larger) exhaust. Compared to the stock at 5-6psi of boost, just a 2.5" cat-back will improve your spool and increase the power. Granted, a 2.5" (or larger) from the turbo back is better, but it doesn't make sense to get a bigger DP unless the rest of your exhaust is larger as well first.

Then, I'd really think about your "final" power goals and how you want to reach it before you start buying stuff as there are many ways to up the boost, but some will be more economical and make more sense for lower boost and some will be more expensive, but much safer for higher boost. Just a thought...as you don't want to buy one setup and then find it limits you later.
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Old 10-11-2006, 10:14 AM   #9
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Ive got the 2.5 cat back, Roadster Sport, I think Tony downpipe next, thanks for the help
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