Now that the smoke has cleared on that other bad deal,.... (most of you know what im talking about) I visited Don Hampton a few weeks back and gave him a deposit to build me a brand new 14-71!
Why a hampton 14-71?
1) Hampton is THE O.G. blower guy
2) Out of all the blower manufactures I called,.. Don was the coolest guy to speak with. Lee at littlefield was a close second, but the straw that broke the camels back is #3....
3) IMO Don Hampton has the best looking blower on the market.
4) Hampton dosent make a 10-71 to replace my old one. If im going to change my distibutor to a crab anyway I might as well go straight to 14-71. Plus a 14 will be better for a future build
Ive got a blown 496 BBC, eddy rpm rec heads (soon to be darts), isky #rr-652 cam on a 112 grind set up on a 108 center, 8.5 to 1 comp, bds comp manifold, Twin holley dominator # 8896 stage three carbs with 96 jets square, 32 degree timing.
I know that nothing is linear, but here is my thinking: I ran my teflon stripped 10-71 @ 10% under. Im not sure what the boost was but accourding to mooneyham it was on the edge for pump gas. It ran great. The new blower is not going to be stripped. These are just rough calcs but...
10-71 is roughly 469cuin X .10 under = 469-46.9= 422.1 cuin
14-71 is roughly 522cuin X .18 under + 533-93.9= 428 cuin
For LAKE bench racing purposes only, lets say the above calcs are close.
Here are my questions:
1) If I back down timing to say 28 degrees, could I turn the 14-71 a smidge faster than 18 % under?
2) The motor is already pig fat...but how much more boost can you get away with by setting it up fat for pump gas?
NO!... I WILL NOT BUY A SMALLER BLOWER