DrCharles
Well-Known Member
I recently put a QF 950 (1.42 venturis, 1.75 throttles) on my 451 and went through a lot of contortions getting a good tune with my big cam.
My bowl-blended 2.08/1.74 iron heads probably don't flow much over 250 cfm, but they got me on the road!
This winter I plan to put on the PRH Stage 1 aluminum heads that do 293.5. How much is that going to change my tune? I am thinking that the air bleeds might need a tweak since there'll be a lot more air flowing at higher RPM. Also, more hp = more fuel, but does that = bigger jets with the same size barrels?
My bowl-blended 2.08/1.74 iron heads probably don't flow much over 250 cfm, but they got me on the road!
This winter I plan to put on the PRH Stage 1 aluminum heads that do 293.5. How much is that going to change my tune? I am thinking that the air bleeds might need a tweak since there'll be a lot more air flowing at higher RPM. Also, more hp = more fuel, but does that = bigger jets with the same size barrels?