New carburetor
#1
New carburetor
I am looking for a recommendation for a new carburetor.
1970 Oldsmobile cutlass supreme
350 engine with an edelbrock intake and 4 barrel carburetor
doesn’t have to be Edelbrock. Not looking for anything crazy. Just a basic carburetor. There are so many out there. Don’t know which way to go
1970 Oldsmobile cutlass supreme
350 engine with an edelbrock intake and 4 barrel carburetor
doesn’t have to be Edelbrock. Not looking for anything crazy. Just a basic carburetor. There are so many out there. Don’t know which way to go
#5
Rebuild a Q jet. I use an Eddlebrock and it works great but the Eddle carb and manifold was the quickest and easiest way for me to go from a two to four barrels.
Last edited by Destructor; June 27th, 2021 at 09:01 AM.
#6
Can echo the recommend the qjet. Great carburetors when properly tuned. More complex than holley’s though, which makes them less popular.
I get mine from SMI (Sean Murphy Induction) in LA area. He does quality rebuilds of both 750 CFM and 800 CFM units. He can rebuild yours or sell you a rebuilt unit, as you like. He can also build stock units, or he has various “Stages” to make improvements over stock which probably don’t pass emissions, especially here in CA.
I hear Sparky Kalkoff in the Midwest is good too if you’re aiming at a really nice show car kind of piece. Cliff Ruggles is long in the qjet business, but i believe he’s getting out of rebuilding and getting into parts.
Whether you go early 70 series or the later 170 series, I recommend a center inlet carb over the side inlet. The side inlet carbs have a freeze plug at the 90 degree turn for the fuel to enter the needle and seat assembly and those freeze plugs on rebuilt units can leak.
I get mine from SMI (Sean Murphy Induction) in LA area. He does quality rebuilds of both 750 CFM and 800 CFM units. He can rebuild yours or sell you a rebuilt unit, as you like. He can also build stock units, or he has various “Stages” to make improvements over stock which probably don’t pass emissions, especially here in CA.
I hear Sparky Kalkoff in the Midwest is good too if you’re aiming at a really nice show car kind of piece. Cliff Ruggles is long in the qjet business, but i believe he’s getting out of rebuilding and getting into parts.
Whether you go early 70 series or the later 170 series, I recommend a center inlet carb over the side inlet. The side inlet carbs have a freeze plug at the 90 degree turn for the fuel to enter the needle and seat assembly and those freeze plugs on rebuilt units can leak.
#8
#9
QuadraJet is a Rochester Products design and vast majority were made by RP. Carter CarBuretor made them also under license; seen many of those as original equipment on Pontiacs and Buicks (who both used CFBs and AFBs as original equipment for years before QuadraJet debuted in 1966).
Holley makes a spreadbore carb for GM (read Chevy, they're side inlet) applications. Tunability of a Holley and efficiency of a spreadbore.
Holley makes a spreadbore carb for GM (read Chevy, they're side inlet) applications. Tunability of a Holley and efficiency of a spreadbore.
Last edited by rocketraider; June 26th, 2021 at 11:04 AM.
#10
Is your edelbrock intake a spreadbore or straight bore design? If its a straight bore use the edelbrock carb, they work great..I had a 600 edelbrock on my 66 442, even with a spreadbore adaptor plTe it ran very smooth, easystart up etc..I went to tricarb set up.Only reason I changed it, if you want to try it I can sellit to you cheap just because I am not goong to use it.
#11
If your manifold is square bore, I can recommend the Holley Street Avenger. Got great results with one some years back on my '68 Camaro SS which had an L-79 327/350. I used a 670 cfm, which is probably about right for you too. Very tuneable, although mine ran nicely out of the box. Crisp and linear response.
#12
Rochester was the go to subdivision for GM for decades. They made a bunch of “jet” carbs over the years — the Monojet, Dualjet, Varajet, and most famous of all the Quadrajet. GM also used a few other brands notably Holley’s in some of their Chevy products, but generally if it’s a 1966 to 1980 or so, it came with a Rochester of some kind.
Eventually all these designs fall out of patent or somebody gets a license to use the design which is where the Demon Holley-style squarebore carbs from. Equally the Edelbrocks are essentially reproduction quadrajets.
Eventually all these designs fall out of patent or somebody gets a license to use the design which is where the Demon Holley-style squarebore carbs from. Equally the Edelbrocks are essentially reproduction quadrajets.
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