Quote:
Originally Posted by DustinS
That is actually what I found out/realized as I looked more into it. Neither of the Australian built Twin-Charged cars ever posted numbers, but I was talking to someone this weekend about them and said they never made over 350whp on the twin charge set-up. The company I was talking to was running a GT35R (even larger now) on their set-up, but no numbers were mentioned either. So I have started looking at a Sprintex 335 and a GTX3576R or slightly larger. Now that I know where to look, I can size a turbo for the set-up.
I was wanting somewhere in the mid 400s on a low setting and close to 600 on a high setting, but it looks like I may not have THAT much control over boost, due to the way the system works. I want a highish power level, with a great torque curve that starts low in the RPM range.
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a positive displacement blower is definitely the way to go. Then you're getting max boost from the blower fairly soon in the RPM range.
The other good thing about a compound boost setup is that the S/C is providing more fuel and air so there are more exhaust gases sooner to spool up the turbo.
yeah with a low boost setting about 400, and a high boost setting around 600-650, that's what I'm looking at eventually doing as well.
I was looking at doing it at about 30 psi for high boost and 22 on low boost.
There are charts that show you what a compound boost setup would look like as far as how much boost you'd be getting from each power adder device.
at 12 psi on the turbo I don't know that even a 3576 would be enough, you'd probably need a 3582 to get where you want to be.
At first glance that would seem like overkill because if you're running 30 psi on a 3582 alone you'd be making about 700hp although you'd be pushing efficiency.
but in a compound boost setup you'll be closer to a 1.8 as opposed to a 3.0 so you max out power at about 600 still slightly pushing efficiency.
a 3576 wouldn't be able to push the air you need to hit 600 in a compound boost setup.
Jaden
p.s. one other benefit to note on a compound boost setup. If you were running a 3582 alone on a fa20, you wouldn't hit max boost until about 5500 rpm, where as in a compound boost setup, you'll likely hit the 12-15 psi by about 3500 rpm, plus you'll be closer to max boost much sooner because of the compounding of boost.