stock 460 engine; D3 heads; performer intake; FPA shorty headers.
3310 Holley vac sec. carb; 750cfm
main jets = 72
power valve = 6.5
secondary side has no jets; just the "plate"; #21
vac secondary spring is the "plain" spring (third stiffest setting)
It seems I need more fuel at WOT; do I need a "high-flow" power valve instead of the "standard" power valve?
Or would I just need a numerically higher power valve?
I have 15 inches of vacuum at idle with the auto trans. in gear.
Fuel pressure is good.
I dont get this surging behavior "off the line" so to speak; it starts to happen as the rpms climb up around 3500 rpm.
It will also do this when I mash the gas while cruising down the interstate; also around 3500 rpm.
Thanks-
3310 Holley vac sec. carb; 750cfm
main jets = 72
power valve = 6.5
secondary side has no jets; just the "plate"; #21
vac secondary spring is the "plain" spring (third stiffest setting)
It seems I need more fuel at WOT; do I need a "high-flow" power valve instead of the "standard" power valve?
Or would I just need a numerically higher power valve?
I have 15 inches of vacuum at idle with the auto trans. in gear.
Fuel pressure is good.
I dont get this surging behavior "off the line" so to speak; it starts to happen as the rpms climb up around 3500 rpm.
It will also do this when I mash the gas while cruising down the interstate; also around 3500 rpm.
Thanks-