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Registered
Join Date: Aug 2006
Location: Cincinnati, Ohio
Posts: 1,019
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These are sized for the application. Remember, we are talking about a 5 liter V8 here with a lot of potential. What a lot of people tend to forget is that the smaller a cooler is the more restrictive it becomes. Once a cooler reaches about 5 psig pressure drop, it is essentially useless. With these coolers on my twin, I make full boost by the 3000-3,300 rpm range...perfect for a street car where you want lots of mid range and top end. I'll lean on the larger side of the intercooler core size every time. Ditto for the turbo.
Lots of factors determine boost response on a turbo car.
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Kuhn Performance Technologies, LLC
Big Gun: 1988 928S4 Twin Turbo, 5-SPD/LSD 572 RWHP, 579 RW ft-lbs, 12 psig manifold pressure. Stock Internals, 93 octane.
Little Gun: 1981 928 Competition Package Twin Turbo, 375 RWHP, 415 RW ft-lbs, 10psig manifold pressure. Nikasil Block, JE2618 Pistons, 93 octane.
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