HOLLY 650 DOUBLE PUMPER. What psi is recommend this holly its on a worked 308

lumpster, Jul 21, 3:23pm
What psi is recommend this holly! Its on a worked 308
kingfisher21, Jul 21, 3:29pm
Around 5 psi will do the trick.
quickstitch, Jul 21, 3:50pm
7 psi
thunderbolt, Jul 21, 4:55pm
6 PSI
patiki1, Jul 21, 5:42pm
5-7
rod-zone, Jul 21, 5:50pm
Thats a HUGE carb (being a double pumper) for a 308.unless its a pretty serious motor! youd be better off putting a 525 or 500 on,better response and fuel economy.Just a thought.we see over carbing on cars all the time
lumpster, Jul 22, 7:41am
The car is a real SLR Torana putting out justover 400 HP.Strengthened M21 & 9 inch from stealy gears.
thunderbolt, Jul 22, 7:54am
You must mean steely gears, I didn't think they were that expensive.
cuda.340, Jul 22, 8:05am
if it is 400 hp then that 650 will be fine, fit a regulator (not the holley brand) & set to 7 psi & it should be all good. what electric pump are you using!
lumpster, Jul 22, 8:07am
Sorry steely gears.No not too expensive but very nice work.
lumpster, Jul 22, 8:22am
Oh dear I have just fitted a holly brand but will be upgrading later on to a fuel pump I just want the car running a the mo it will be another year before she's back on the road. It's running around 6psi
quickstitch, Jul 22, 8:40am
if we are correcting. Steelie Gears
thunderbolt, Jul 22, 8:49am
Love your work QS
patiki1, Jul 22, 9:01am
Holley regulators are fine,its the procomp one's to which out for.Good luck with the M21 with 400HP
attitudedesignz, Jul 22, 9:05am
Was thinking the same thing myself.
cuda.340, Jul 22, 9:20am
if you ever pull a Holley regulator apart you'll quickly see it's a poorly made item from a rough as guts casting. compare with a Mallory which is similar money & you'll notice a much higher quality of build & also notice the Mallory will out flow/perform a Holley anyday. if you look at serious racers in motorsport, it's not likely you'll see many Holley regs.
patiki1, Jul 22, 11:34am
Ive had my holley regulator for over 20 years now and still going strong.Holley has Billet Fuel Pressure Regulators which serious racers would use.