Make a Bid or Run Mk2

Richard are you forgetting about the L46?? 350 H.P., 350 with a Qjet??

An excellent Engine!!

Thanks
Randy

chromebumpers said:
Yes all non HO engines in C3s are QJets.
I have a lot of respect for Quadrajet 4V carbs when they are properly set up and tuned to the engine it's on. They are typically 750 cfm and more in some Pontiacs and some HO applications. My QJet has a quick response, smooth operation and starts quick hot or cold. This particular time I sent my carb to Lars in CO, Lars is a highly respected carb and distributor tech with both bench and test engine tuned. Lars also rehabbed the distributor replacing all worn internal parts and customized the spring rates for precise advance operation.
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I really like 300 H.P. 350 Engines, an excellent combination of reliability, performance and economy.

The carb on this Engine is somewhat of a mismatch, the proper 7040203 carb was a beauty with a very unique choke pull off.

The 1977 truck carb on it is not very well suited mainly due to the choke system, and the "smog" metering.

Thanks
Randy
 
GLHS60 said:
Richard are you forgetting about the L46?? 350 H.P., 350 with a Qjet??

An excellent Engine!!

Thanks
Randy
Click to expand...

I'm not sure I know what you mean Randy? Yes, that 350/350 sure sounded great WOT! Did I mis-state something?
 
GLHS60 said:
You referred to it as a non High Output Engine, unless I misunderstood.
.
Thanks
Randy
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LOL, I think so. I said, " All non HO (high output) engines in C3's are QJets"
The Only rightfully labeled "HO" C3 is the L-88 427, the LS-6 454 and the LT-1 350.
I think, though I could be wrong, the HO's have Holleys and are solid lifters.
The L-46 350/350, although is an awesome engine, it's not considered an HO engine.
 
L48 was standard performance, L46 High Performance and LT1 Special High Performance in Chevy lingo.

H.O. was typically a Pontiac term.

Thanks
Randy
 
As long as you know what I mean with listing those engines with super performance that's all that counts.
 
Standard performance, regular cam: High Performance, high performance hydraulic: Special High Performance, solid lifters: Chevy lingo, from Chevy.

Thanks
Randy
 
Would you gents buy a clone off of Summit... a Holley or adapt for an AFB? I'm inclined to snag an adapter and go with a 750cfm AFB, electric choke + one inch adapter.

I think the kid prefers fuel economy rather hardcore performance
 
The correct Q jets beats all in driveability, performance and economy.

Rochesters finest calibration just before regulations began crippling Engine driveability, performance and economy.

It took until 1985 and modern MFI to equal the mighty 300 H.P., 350 in the above mentioned categories.

Or propane, like I still run on 2 older vehicles!!!

Thanks
Randy
 
Hm... I like that idea. I just never tuned a Q-jet before. (looks complicated) But I did like mine when I had it with those small responsive primaries, giant secondaries - and great idle cold.

Just gotta make sure it is the same model...
 
DorianL said:
Hm... I like that idea. I just never tuned a Q-jet before. (looks complicated) But I did like mine when I had it with those small responsive primaries, giant secondaries - and great idle cold.

Just gotta make sure it is the same model...
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Like many things it only looks complicated until you understand it. It's like grammar, appears difficult until you know the rules. Know the rules and you've mastered everything.
 
DorianL said:
Hm... I like that idea. I just never tuned a Q-jet before. (looks complicated) But I did like mine when I had it with those small responsive primaries, giant secondaries - and great idle cold.

Just gotta make sure it is the same model...
Click to expand...
There are some really great books on Quadrajet carbs but there are plenty of free PDFs that say the same, the pictures go a long way working with these carbs. I have about 3 or 4 of the most popular books myself. Cheap when you get the books on Amazon or I can send you something.

Although you can't buy a new Quadrajet there are plenty of rebuildable carbs readily available for less then $100 most anywhere.a
 
Just gotta make sure it is the same model...[/QUOTE]

GLHS60 said:
I really like 300 H.P. 350 Engines, an excellent combination of reliability, performance and economy.

The carb on this Engine is somewhat of a mismatch, the proper 7040203 carb was a beauty with a very unique choke pull off.

The 1977 truck carb on it is not very well suited mainly due to the choke system, and the "smog" metering.

Thanks
Randy
Click to expand...
 
I highly recommend avoiding the commercial remanufactured QJets. They are very problematic with swapped parts, reproduced hardware from China, and epoxy repairs. I have a large collection of both rebuilt and good rebuildable cores most are from the mid 1960's to the early '80's and very affordable prices, most from $100 to $200 for popular engines and high performance applications. Some rare collector car carbs are difficult to find replacements so they maybe a little more.
 
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