BOTTLE ROCKET

iTrader: (4)

Each time someone starts trying to make a decision on a set of heads, PP, TEA, PRC, stage 1, 2.5 etc, the conversation always centers around max hp #s on the dyno, as the measuring stick, instead of low end drivability.
Is the real reason for the big numbers these heads are producing just a result of these heads being "hogged out" so they will flow at the top end?
I am shopping for some heads for my wife's cam/bolt on car, and I really don't think those 220+ intake runners of the ported heads will give her the performance where she spends 95% of her time, idle to 3000 rpm.
Wouldn't the better choice for a PURE street (read; NEVER tracked) that sees the occasional street action, be a head with 205 intake runners, even if it is an aftermarket head like AFR, DART, Edelbrock, etc. because of the increased flow velocity and resulting cylinder fill?

Darkman

iTrader: (2)

I recently added Trick Flow 215s and a FAST 102mm intake (with a 90mm LS2 TB) to my LS6. The significant gains were over the 3,500-6,500 rpm range, However, the TFS 215/FAST102 setup made both HP and TQ at least equal to the old setup at every rpm in the 2,000 to 3,500 rpm range. The dyno did not report below 2,000 rpm.

The car (2005 CTS-V), which also has a mild EPS cam, drives like stock except it makes more power as already mentioned. It also get gas mileage at least equal to before (25 mpg highway).