proform carb tuning

[bubba1228]

need some jetting and squirter help, i just bought a proform main body for my 650 double pumper and it dont run very good. here are a few specs 350 +.060 flat tops .525 cam 1.6 roller rockers 210cc 1.6 2.02 64cc aluminum heads victor jr intake all msd idnition full headers dual exhaust 4.10 gears and my elevation is about 5000 feet above sea level

as for the carb i swapped in the pro form main body with the supplied jets 75 front 82 rear along with a 45 power valve and 31 squirter, it ran way rich tried dropping squirters to a 28 ran bad dropped the jets to a 70 front 75 rear still ran bad and when i say bad i mean spitting and sputtering and popping thru the exhaust


i called holley techline to get some insight and they said they couldnt help me because it is not a holley product


needless to say jets squirters and fuel are getting pricy so any input is greatly appreciated

 

[bubba1228]

bump

 

[monte olrac]

ok, keep the larger squirter, and try a 50cc diaphram...you will need to check your vacuum reading in drive and divide that in half for your power valve, you may have to play with jetting a little since your 5000 above sea level i have no idea what would average at that elevation. hope it helps you out a little

 

[bubba1228]

*UPDATE* i did a vacuum check dropped the power valve to a 3.5 and it made a world of difference now i just hotta tweek with the jets a bit but i picked up a whole jet kit for 30 bucks so i think im set..... thanks for the info