Every one says that a Fast 90 mm intake will work better than a 90mm on a stock displacement engine. I am still not convinced that this is so. Does anyone have dyno number to show that a Fast 90mm works better than a 78mm intake on a stock displacement engine.

 

78 is garbage over an LS6.
90mm is the way to go.

Attached: LS6 intake/SLP LT's vs. FAST90/QTP HVMC LT's (not exactly apples to apples intake comparo, but you can see the results are significant on stock bottom end/cubes).

http://home.att.net/~carlos.ramirez1...2/site1048.jpg

 

Go 90 or go home.

 

Fast 78 is 10-12 HP better than LS6/78 combo...

Add 3-5 for the larger 90 version.

No such thing as too big a TB (unlike carbs which meter and atomize fuel hence proper size being more critical).

Is a 78 FAST worth decent gains?...Yes....but a 90mm version is worth more.

 

Thanks. Your comments are worth while.