What jet and pv size on a 4150HP on SB?

mshred said
hey guys,

I have a 4150hp (750hp holley)

secondly, my car drinks gas like its going out of style! and im not exagerating here! yes my carb is a double pumper, yes i do like to get on the gas here and there, but damn, i can actually watch that gauge drop down! its quite scary actually lol...i knew it was gonna suck gas, but i didnt think it was going to be this bad, which is why im wondering, maybe the power valve is the wrong size and dumping too much fuel? maybe its running way too rich? (I am getting burning eye syndrome after lots of driving, but thats also because i have dumps)

Ha ha ha, yep! That's all about right, I have been whatching gas tank gauges drop for a long time now....they do this you know...on something with some power, OH hell ya they'll do it right in front of your eye and stay down there.
Your build below is about just right for this "Drinking like a whino fresh outta overweekend lock up into a free whine tasting store with no one around but him"
Don't worry though, it's normal. Just wait till you build something with a boat load of power. Then you'll really feel it.

mshred said
i believe it is a downleg booster style, but to be honest im not 100% sure how to check that...I dont think it is annular booster since i would have had to pay more for that i think, but it doesnt hurt to double check

so maybe i am running a bit fat then. My 340 is very mild comp 230 dur at .50 cam 480 lift single pattern, air gap, 1-5/8 headers to 3 inch xpipe exhaust, .30 over with stock heads, deep pan with tray, 3.91 gears

as far as the power valve goes, when hooked up to the vacuum gauge it looks like the pv i have is the appropriate size, but im just wondering since i felt that i have a rich condition and it seems like its overly sucking gas, so i thought it might be a possibility and wanted to see what you guys are running

Like it said above. A vacuum gauge is very helpful with tuning. You shouldn't have the burning eyes syndrome. That is running rich. When you achieve the highest vacuum reading on the gauge, 1/2 of the reading plus 1 or 2 is wheat the PV will be.

Remember twisting the distributor is all part of the tune as well. This will all take some time. Enjooy some track runs while doing this.

Rob