Quote:
Originally Posted by Zsteve
This makes sense, with my 4 cyl turbo, when we just upgraded theintake and Down Pipe we saw huge gains as more air was flowing in and out. When I chipped the ECU I also went 3 in TBE and with the small turbo on the car I hit full boost @ 2500 rpms and actually had more TQ than HP on the car. I had over 300 TQ and about 260 HP on a 4 cyl FWD car, it was fun to feel all that TQ. Since the turbo does create its own back pressure we could go larger on the exhaust (to a point of no return of course) but I guess NA cars use the exhaust to create the back pressure.
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That is the same result that I saw when upgrading the intake and exhaust on my S13 Fastback (CA18DET). It seemed as if I was at full boost sooner, but I had no way of really telling for sure. I also installed a Power FC the next day and spent like 2.5 weeks and 5 50 liter fillups (sucked) tuning it (mostly DD efficiency). When I upgraded from the T-2-Small to 2871, all I could say was WOW. And it was a bolt on affair.
Quote:
Originally Posted by shumby
MOds/admin. please move the turbo posts to there owen thread. There is useful info here but all these posts will take away from the point of this thread. (GTM's SC) makes it hard to search and find info in this topic
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The next quote pretty much sums it up, but everyone is entitled to their take on things.
Quote:
Originally Posted by Buddy Revell
Because the compressor side of a turbo and a centrifugal supercharger are pretty much the same, unlike a roots-type/twin-screw supercharger. Understanding one will give you a greater understanding of the other.  |
Well put.
Quote:
Originally Posted by BRUSSO
to me the point is simple..... if you are making a small amount of boost(3-5lbs) the stock exhaust and cats can handle the amount that is trying to be pushed out. However, the more boost you make (8-10lbs) the more trouble the stock exhaust has . So by removing the restrictions in the exhaust you will see higher gains with higher boost levels.
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Sounds like something that I can agree with, but I have never increased boost pressure in my setups. I have only swapped out turbos for more efficiency for my application and driving habits.
