Well among other issues, one problem I am having with my new engine is that I can't get it to idle lower than 1200 rpm. Everything I have seen leads me to a vacuum leak and I think I may have found one. In the picture I have attached there is a group of three holes where the choke would be if I had it and I think the topmost one is giving me issues. I can feel the vacuum sucking on my finger when it is running and if I spray carb cleaner into it while it is running the engine will rev up. Do do I need to plug this hole? Oh and the carb is a Holley 4160 series carb. Thanks
Yup Ive seen this before when the electric choke sticks and folks remove it. Most use a screw or silicone to plug it.
yep, that port runs full manifold vacuum. you might get a cheap manual choke assembly on fleabay, that would plug the port, too.
Alright, I got that hole plugged and it helped some but I found that the secondary throttle shaft also has a pretty big leak too. I'm wondering now if I should even bother fixing this carb or just getting a mechanical secondary carb. What do you guys think? The engine is a 302 with Victor Jr. heads, a big solid lifter cam with unknown specs, Victor. Jr intake, and it's still pulling at 6,500 rpm. I'm just scared to take it any higher lol. I'm also runnin a manual transmission and 3.55 gears. Is the 3310 carb I have a good match for this setup? Or would I be better off going with a double pumper. Thanks
If you aren't concerned with fuel economy, then go with a double pumper, I'd suggest a 600 or 650, nothing larger. Your setup will out pull the bottomend, if the short block and rotating assembly are stock parts. The redline will be based on the rods in the engine.
