Quote:
Originally Posted by cherrington17
obviously each turbo is different, but there'd HAVE to be a direct relationship to what psi produces approx what Hp gain.
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I'm going to tell you what others have told you: it doesn't work like that.
Quote:
Originally Posted by BlackJack
Cherry.....there's no such thing as what you're asking for.
you can take the same turbo and put it on two different cars and get two differrent sets of numbers.
Factors it depends on:
Overall flow
Fuel grade
Altitude
Tune
Valve size
Intake path size/smoothness
Condition of compression rings
Total ignition system
and the list goes on and on.
I can take a t3/t4 at .57 trim, .63 AR and make 200hp on one engine, and 300 on another.
A well maintained high-mileage engine may withstand 300hp, while a hard-beaten low mileage engine might blow at 250.
I think you get the point.
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What BlackJack says^^ is very true, and to add to it, 10psi on one turbo does not flow the same as 10psi on another turbo.
Let's say for example you have a GT1548 compared to a GT3582R on one given engine both pushing 15psi. The GT1548 will be close to it's maximum output and will probably produce somewhere around 170-190hp. The GT35, because it flows so much more air, would probably push over 400hp at the same 15psi of boost.