i have a 350 with camel hump heads and an edelbrock performer cam and intake in it, and an edelbrock 750 carb, and it runs good just sitting there, just got the car running and cant take it out yet, but when i rev it it puffs black smoke out the pipes, and i checked a plug and its black and sooty, so my question is i have a 600 cfm vs holley 4160 in my garage and i wonder if i should just put the one on instead of trying to tune the edelbrock, cause its brand new, also its a turbo 350 trans and i have my power brakes running off the intake, so would one of those little barbs on the side of the carb be enough vacuum to make the trans shift right? also would i need a new bracket or anything for the kick down once i switch back to my 7004r which is being rebuilt? haha sorry for so many questions! thanks

 

I prefer Holley, BG, etc. over Edlebrock for the performance and ease of
tuning the circuits. I think you'll like the Holley once you get used to it.

Yes, as long as it's referenced to the intake manifold.

Most likely. If not, be ready to make some adjustments. It's rare to swap
carbs and not need to adjust the trans. kickdown, or throttle linkage.

Not overly difficult, it's just something you will need to consider.

 

I think going to a 600cfm carb on a mildly built 350 is a step in the wrong direction. The Edlebrock carb is a piece of cake to work on, why not spend the time to jet it correctly. Its doubtful that that Holley is just going to bolt on and run right, and may not even be adequent for your combo. Of course, if you like to experiment, start tuning and jetting each carb, and see which one you can get running the best.

 

well today i switch to the holley, and it went alright i guess, at first i couldn't get it to idle any lower than 1500... so i came on here and read for about an hour, took my carb back off, re-adjusted the secondaries to where they should be, which is 99.9% closed from what i gather, and i set the fast idle screw differently, and bolt it back on and fire it up and i got it down to idle about 750 maybe 700, seems to run decent, nice idle, and not alot of black smoke like the edelbrock, but if i slowly open the throttle, it revs up fine, but if i just smack it open, it kind of dies, then pops, then revs up, so whats the problem? ive messed with the idle screws a bit, not too much, just left them about 2 turns out, would this be an accelerator pump problem? not enough squirt?

 

Yes.

 

so how would i got about correcting this ? when i just crack the throttle open, it just kinda pops then revs up a little, but if i slowly open it it revs up just fine, what should i do?

 

It seems like the engine wants more fuel, earlier.

You can try changing the pump cams and/or nozzles to tune it out.
If that doesn't work, there are more complex methods to dial in the fuel
curve.

What colour cam is on the primary side now? Pink?

What about the nozzle size (the value is stamped on the front)? 28?

 

What type of distributor are you running? The reason I ask, one of my friends bought an '85 trans am that had been converted from TPI to carb. It had an Edelbrock carb on it. Whenever you opened the throttle, you would get puffs of black smoke. He spent DAYS messing around with jets and accelerator pump nozzles with no success. Finally I checked the ignition timing and noticed it had no advance. Whoever swapped from TPI to carb kept the computer controlled distributor, which has no advance mechanism. We put an old HEI in, set the timing, set the carb back to stock, and it ran wonderful.

Lots of ignition issues get blamed on the carb, make sure yours is good to go before you get frustrated chasing the carb.

 

normal hei, timings already set, and idk on the cam color and nozzle size, have to check on that tomorrow