carburetors (plugs, best, tuning, exhaust)

[pontiac boy]

I have a 1975 pontiac grandville 455, what is the best carburetor to put on it

[rbohm]

a reengineered quadrajet is a fine carb to use on a stock motor. edebrock builds a nice one.

[GTOlover]

I loved the old 4-bbl Holley Carburetor 600 CFM Maunal Choke that I had on my 1983 Ford Full-Size Bronco with 351W HO V-8 it worked well for me and that vehicle.

[LakeLifePA]

Originally Posted by rbohm

a reengineered quadrajet is a fine carb to use on a stock motor.

This. Find a shop that specializes in Pontiacs and get the original carb rebuilt there. I had my carb built years ago by Cliffs High Performance Quadrajet Experts, and he did an amazing job. My '69 Firebird ran incredibly well after he got done with my stock carb. I had an upgraded exhaust (headers and free flowing mufflers) and changed out the heads to Ram Air III heads, and he made adjustments for those changes as well.

He also sells kits if you want to tackle the job yourself. Find his website here: Cliffs High Performance Quadrajets :: Qjet Carburetor Rebuilding, Quadrajet Tuning, Qjet Rebuild Kits & Parts

If you don't have a 4-barrel carb at present, find a used one and send it off to them.

[Lux Hauler]

Doesn't get much better than a properly tuned Rochester Quadrajet.

[rbohm]

just remember that the problem with the quadrajet is the well plugs like to leak, especially the primary side, so if you rebuild the carb yourself, seal these plugs with some epoxy. the primary plugs look like lead BBs, and the secondary plugs look like smaller versions of the freeze plugs you see in the side of the engine block.

[duster1979]

I agree with having your Quadrajet rebuilt by someone qualified.

[rbohm]

i find this interesting that today people agree with using the old Qjets, back 25 years ago everyone was pushing holleys.

[duster1979]

Originally Posted by rbohm

i find this interesting that today people agree with using the old Qjets, back 25 years ago everyone was pushing holleys.

I remember that, as well.

I also remember lots of people switching back from the Holleys to the Q-jets when they figured out that the grass wasn't really greener on the other side of the fence.

[rbohm]

Originally Posted by duster1979

I remember that, as well.

I also remember lots of people switching back from the Holleys to the Q-jets when they figured out that the grass wasn't really greener on the other side of the fence.

very true also.