Posted by: CLVLNDLVR
02/09/2002, 11:00:58
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:=what is your best guess why my engine basically dies at 5800 rpm's. i have a built cleveland in a 71 grabber. bored .040 over, balanced, forged pistons, electronic ignition, torker intake, bigs performance 850 dbl. pumper, 4.11 rear. lunati cam with 224/234 @ .050 536/566 lift. i don't know if i'm running out of fuel or what but when i run the car.....i could hold it in low and it will basically hold at 5900 rpm's. i think it should run to 6500-7000 no problem. i have a stock carter mechanical fuel pump and i'm wondering if i should go to a high performance electric or mechanical. any other ideas out there. post here or email. thanks for any advice, David I'VE TRIED SEVERAL CARBS. EACH ONE GIVING ME A DIFFERENT TOP RPM. THE SMALLEST, AN EDELBROCK 600 CFM GAVE ME ABOUT 6200....A 750 HOLLEY ABOUT 6000 AND NOW THE 850 ABOUT 5800. THIS LEADS ME TO BELIEVE MY FUEL PUMP DOESN'T DELIVER ENOUGH FUEL FOR THE BIGGER CARB. WHAT DO YOU THINK? Change the fuel pump to electric, get a regulator set it for 5 lbs to start. Try dropping about 4 jet sizes in all 4 corners. 850 double is a lot of carb for a 351. See if you know anyone with a 650 or 750 and try that also. Do you have a stock distributor? They suck and most won't go past 6000 rpm at all. Hope this helps!
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