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      01-28-2011, 06:05 PM   #39
powertrip
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Drives: 2009 E92 M3 DCT
Join Date: Apr 2009
Location: Irvine, CA

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Great info there, AJ. Thanks!

Quote:
Originally Posted by AJ@ESS View Post
VT2-575 under full load is 8-15C over ambient.
VT1-535 under full load is 20-30C over ambient.

During VT1-535 testing we ran the intercooled VT2 manifold on the VT1-535 boost level and compared performance. The difference was less than 10whp, and it could not be felt in the car at all. In our experience the point where chargecooling really starts to matter is ~7PSI, below this boost level the benefits are marginal.

This is of course heavily dependant on a proper cool air feed to the SC inlet. If you run a SC with engine bay mounted air intake, intercooling becomes much more important as the air you start out with pre-compressor is usually much warmer.
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2009 E92 M3/DCT/Alpine White/Fox Red/Carbon Leather
OE Tuned 402 whp & 303 wtq/Gintani X-pipe/MXP Axle Back/Rogue Pulley/AFE Stage 2/Cosmetics By IND & EAS
HUGE THANKS: Gintani, OE Tuning, and EAS
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