P
pdelo
Guest
Hi all, new member here, longtime gearhead but 1st time vette owner. I recently purchased an '81 with a rebuilt 350 with 9.0 compression (supposedly). It has a Comp Cams 260 flat tappet cam with roller rockers, an Edelbrock Performer intake and the original electronic Quadrajet and HEI distributor. The carb was supposedly rebuilt by a Quadrajet expert(?) and the distributor was reworked also. The car starts beautifully, idles well and runs fantastic on the primaries, but if you punch the accelerator the engine bogs massively and sometimes back fires through the carb. I checked the timing, its at 12 initial and the distributor advance is working as the engine revs though I didn't determine was the full advance was. I know you have to disconnect the computer to reset the timing but the old Chilton's manual I have had me looking for a plug to disconnect that I couldn't find, so I left it alone. On the carb, the air doors seem to have the right amount of tension so I left them alone and everything else seems right. I remember something about secondary feed tubes falling out or something like that from back in the day but I'm not sure. I know most people will tell me to ditch both but I would like to see if I can get this setup running well and then go from there. I'd appreciate any ideas anyone might have, thanks