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When you dyno a twin intercooled blower such as the ATI and the fans on the dyno are only setup to blow the radiator in the center, Is there more hp to be gotten when at speed and the cool air flowing over it?
Absolutly!!!
The first time I dyno'd they had 1 fan blowing down on the top of the front bumper..... :mad
Needless to say the numbers were very disapointing with out any engine cooling or any intercooler flow. :mad
The ambiant temp that day was about 80 deg. with 60-70% humidity soooo
when I objected to the numbers the guy told me "thats the way we do all of the runs".
He also said that's why he never was a big fan of Pro Charger, hmmm maybe thats why?
Needless to say I found another shop that does it right. :D