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polizei polizei is offline
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Join Date: May 2007
Location: Collegeville, PA
Posts: 1,344
Originally Posted by spence88mph View Post
I never knew this was the case, so many cars i see run the 'side to side' style, I had no idea you could loose that much boost, 4.5 is a huge drop!
I was very surprised as well, Spence. Check out this link:

Column "B" is the length of the end tanks and Column "C" is the length of the cooling tubes/fins. End tank length along with core size largely determine the air flow (CFM) In those terms, there is a large difference between an 18x6x2.25 and a 6x18x2.25. The first yields close to 800 CFM, while the latter yields around 250 CFM (about 3 PSI drop for our cars!). The larger the gap between the CFM rating of your IC and turbo the greater PSI drop will be, provided the IC has the smaller CFM. Intercoolers can be too large as well. Either way, if your IC flow rating is not within proximity of your turbo's output, you'll experience more turbo lag.
Andy - 1987 911 Carrera Coupe
Old 08-16-2008, 05:32 AM
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