Small Block Chevy does NOT like the Cold.

[RANDY P]

Cliff Ruggles has the world's biggest backlog. I'm thinking of Sean Miller for my next QJet. I've got a 750DP that works fine on my pontiac, but still the idea of a Q-jet for part throttle is appealing. I just can't get the damn Q jet to quit being so finicky about fuel pressure. I need to upgrade my delivery system.

Today's tip from the 50's:

You're doing it wrong. Cast iron Chevy exhaust manifolds aren't meant to have gaskets. iron-to-iron only.Throw away the silver Fel-Pro gaskets that burn out all the time.

[creaturecat]

me like the Q-jets.
anyways, once upon a time, i had an open chamber big block with a tunnel ram, wouldn't idle worth ****.
we threw on an msd ignition module, and it would fire right up and idle like a champ. some serious spark action there.

[Geoz1]

Originally Posted by Norm K

Sounds like someone opened one up as a novice expecting to find a parts count similar to that of a Holley and instead found a far more complex fuel delivery apparatus. Undeterred, disassembly of this marvel of fuel atomization continued until they were so hopelessly in over their heads that they threw the entire lot of parts in the trash and jumped on the "Quadrajunk" bandwagon. Shame, because if they'd taken the time to really learn about them they'd have discovered that the Quadrajet is probably the finest street-use carburetor ever designed.


_

Excellent post.

[asphaltgambler]

Originally Posted by Norm K

Sounds like someone opened one up as a novice expecting to find a parts count similar to that of a Holley and instead found a far more complex fuel delivery apparatus. Undeterred, disassembly of this marvel of fuel atomization continued until they were so hopelessly in over their heads that they threw the entire lot of parts in the trash and jumped on the "Quadrajunk" bandwagon. Shame, because if they'd taken the time to really learn about them they'd have discovered that the Quadrajet is probably the finest street-use carburetor ever designed.


_

I could not agree more!! I was fortunate enough to be schooled by a much older GM tech ( at the time) taught me all the tricks on those. BTW - there are many different versions / part #'s. Makes a huge difference to have one at least close in zip code to the application its sitting on.

Further - there were actually 800 CFM versions that only came OE with certain hipo Pontiac / Buick / Olds. Those are the ones to use in performance street engines larger than 400 CID.

[Geoz1]

Originally Posted by asphaltgambler

I could not agree more!! I was fortunate enough to be schooled by a much older GM tech ( at the time) taught me all the tricks on those. BTW - there are many different versions / part #'s. Makes a huge difference to have one at least close in zip code to the application its sitting on.

Further - there were actually 800 CFM versions that only came OE with certain hipo Pontiac / Buick / Olds. Those are the ones to use in performance street engines larger than 400 CID.

I believe there was over 10k versions over the years. Many people have screwed them up by mixing and matching pieces.

Cadillac's also had large CFM Q-jets.