Holley Jet Size Chart

Holley Jet Size Chart - The holley is a stock replacement for the 425hp 396 and 427s. You might want to experiment with power valves too. The reason i'm rebuilding is because it stumbes hard and sometimes fires through the intake from idle. The car seems to run fine with that. If you drill out a jet, you will be lengthening the the metering passage, and increaseing the amount of flow restriction. I want to lower the jet size but they are number 582.

It is a roughly 10:1 427 with an ultradyne 276/284 cam installed 6 degrees advanced, heavily massaged 049 heads with 2.19/1.88 valves and a holley 3310 rated at 780cfm on a chevy aluminum intake, (looks almost exactly like a edelbrock performer rpm with 1/2 shorter plenum). I'm not sure what size jets are on this car because it was on a street rod before. I have a 355 with 600 holley, headers, 5 speed, 226 duration cam. The car seems to run fine with that. With our 4.10 geared l78 and the stock 4346 780 holley and headers, i run 6.5 power valves front and back, #72 primary jets, #76 secondary jets.

Holley Jet Size Chart

Holley Jet Size Chart

Holley Jet Size Chart

Holley Jet Size Chart

Holley Air Bleed Size Chart

Holley Air Bleed Size Chart

Verifying Holley Jet Sizes CorvetteForum Chevrolet Corvette Forum

Verifying Holley Jet Sizes CorvetteForum Chevrolet Corvette Forum

Holley Jet Size Chart

Holley Jet Size Chart

Holley Jet Size Chart - Paul, the holley suggestion of decreasing jet size by one number per 2000' elevation is a good starting point. 2) also any help figuring out how to tell whats the best jet for this set up (ball park) would be appreciated. Holley 650 model 4011 carb i also have a stock th350 my carb needs a rebuild. If you believe all the tunning data out there on the net that 'should' have been in good tune at sea level. The reason i'm rebuilding is because it stumbes hard and sometimes fires through the intake from idle. Holley jetting chart jump to latest 25k views 10 replies 4 participants last post by snoc653 nov 14, 2012

If you drill out a jet, you will be lengthening the the metering passage, and increaseing the amount of flow restriction. Rf #74, lf#78, lr #76 and rr #78. I called holley and they said they were a metric or special flow jet for those carbs and there discontinued and they didnt really help me out. 1)what size main jets should i start out with? This from supertuning and modifying holley carburator's.

2) Also Any Help Figuring Out How To Tell Whats The Best Jet For This Set Up (Ball Park) Would Be Appreciated.

1)what size main jets should i start out with? I want to lower the jet size but they are number 582. This from supertuning and modifying holley carburator's. If you drill out a jet, you will be lengthening the the metering passage, and increaseing the amount of flow restriction.

I'm Not Sure What Size Jets Are On This Car Because It Was On A Street Rod Before.

Rf #74, lf#78, lr #76 and rr #78. If richer or leaner mixture is desired, change all jets up or down in size. If you believe all the tunning data out there on the net that 'should' have been in good tune at sea level. The car seems to run fine with that.

I Have A 355 With 600 Holley, Headers, 5 Speed, 226 Duration Cam.

Holley jetting chart jump to latest 25k views 10 replies 4 participants last post by snoc653 nov 14, 2012 Reduce jetting one jet size for every 2000' of elevation above sea level. I have a holley #9776 its a 450, i have 2 there made for a tunnel ram. 14.2 mpg (imperial) on the highway.

With Our 4.10 Geared L78 And The Stock 4346 780 Holley And Headers, I Run 6.5 Power Valves Front And Back, #72 Primary Jets, #76 Secondary Jets.

Paul, the holley suggestion of decreasing jet size by one number per 2000' elevation is a good starting point. The holley is a stock replacement for the 425hp 396 and 427s. Holley 650 model 4011 carb i also have a stock th350 my carb needs a rebuild. It is a roughly 10:1 427 with an ultradyne 276/284 cam installed 6 degrees advanced, heavily massaged 049 heads with 2.19/1.88 valves and a holley 3310 rated at 780cfm on a chevy aluminum intake, (looks almost exactly like a edelbrock performer rpm with 1/2 shorter plenum).