Thread: Well, I've tried most everything.

Tweet

he already said the timing was tried at 8-12. two dizzy's doing the same thing ????????? not likely.. three carbs all doing the same thing again not likely. as for the vacuum gauge if you have no base line and the car idles fine tell me how your going to read it???? the car pops on heavy accel not sure how a gauge will show anything there...i'm not sure way you would run as much int timing as you can?? i run all may sbc with locked out dizzy's. is there something that i don't know about as to way you wouldn't run 20deg of int???

Ah! I let this thread go, I haven't been able to get on in a while here.

I set my initial to 8 degrees, and we're still having the same problems here. I have really steady vacuum, about 17" at idle.

I'm starting to think it's a valvetrain problem. I want to go through and totally readjust all the valves and see if it helps at all. There is a tick on #5 intake, and I don't know if it's a lifter or a loose rocker arm. I was trying to hot adjust it, and gave it about a 1/4 turn tighter, and the motor seemed to lug a little, so I backed it off, not wanting to do any damage inadvenrtantly.

Both of these distributors were new, one brand new (the Accell Blueprint Points-style) and a newish HEI with an Accell SuperCap. The HEI was in use on the last motor, and worked like a dream.

Also, it should be noted that only the 750 is a double pumper, the first 600CFM was an edelbrock, and the 650 was a Holley, non double-pumper.

I'm leaning towards valve adjustment thought. Thanks alot for the help, You can probably imagine how frustrating it is to have a brand new motor, and and endless supply of problems. Sigh. Hopefully this thing will run right someday

Could be a bad plug or wire,too. Even new ones can be NFG.

Secondary float level low?