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Cheap new universal carburetors
#1432583 Tue Dec 07 2021 12:29 AM
Joined: Nov 2002
Posts: 2,347
C
Carburetion specialist
There have been a number of threads about the replacement Chinese carburetors. While not a single barrel, here is an in-depth analysis of one of the Chinese knock-off Rochester Q-Jets by one of the most respected of all Q-Jet specialists:

Chinese Q-Jets [corvetteforum.com]

Those who believe in the tooth fairy, Santa Claus, or the cheap Chinese carburetors should read this article in its entirety!

Jon.


Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify
If you truly believe "one size fits all" try walking a mile in your spouse's shoes!
[image]http://www.thecarburetorshop.com/Avatar.jpg[/image]
Re: Cheap new universal carburetors
carbking #1432597 Tue Dec 07 2021 02:15 AM
Joined: Dec 2018
Posts: 1,444
F
'Bolter
carbking After years of Q-jet service whatever came in the door,if you put in a kit, a float,be sure base is flat,tune the pump and it will run ! Of course gotta have valves and a good cam seal the well plugs and so forth ! However glad that is over,now for hollys LOL LOL!!

Re: Cheap new universal carburetors
carbking #1432599 Tue Dec 07 2021 02:21 AM
Joined: Dec 2018
Posts: 1,444
F
'Bolter
carbking Oh I forgot that trusshead screw that can get down it's throat drat !!

Re: Cheap new universal carburetors
carbking #1432619 Tue Dec 07 2021 04:04 AM
Joined: Feb 2004
Posts: 24,250
H
Kettle Custodian (pot stirrer)
Good info, Jon. BTW, thanks to our resident shade tree specialist for his words of wisdom!
LOL!
Jerry


"Freedom's just another word for nothing left to lose"
Kris Kristofferson

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!

WAG MORE- - - - - -BARK LESS!
Re: Cheap new universal carburetors
carbking #1432640 Tue Dec 07 2021 02:45 PM
Joined: Jan 2014
Posts: 1,955
J
'Bolter
Aren’t there enough rebuildable real Q Jets laying around to last us a few decades?

I don’t understand what the market need is here. There’s a bit more scarcity with the usable one barrels and I can understand the perceived need for the bad Zenith copies. Bad as they may be.

Re: Cheap new universal carburetors
carbking #1432650 Tue Dec 07 2021 03:27 PM
Joined: Nov 2002
Posts: 2,347
C
Carburetion specialist
JW - there are plenty of both available, one simply has to look. Sometimes instant gratification is not an option, one needs a wee bit of patience.

As to the Chinese knock-offs: if one has thousands of dollars of test equipment, and more thousands of dollars in spare parts, a lifetime of experience DESIGNING and repairing carburetors, and figures their time is worth absolutely NOTHING, then the Chinese knock-offs are cheap! wink

I linked Lars' post, as, along with Cliff Ruggles, they are the two most knowledgeble men of whom I am aware with Rochester Q-Jets.

Guessing someone that specializes in Zeniths could find about the same issues with the knock-offs.

But to each their own.

Jon


Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify
If you truly believe "one size fits all" try walking a mile in your spouse's shoes!
[image]http://www.thecarburetorshop.com/Avatar.jpg[/image]
Re: Cheap new universal carburetors
carbking #1432656 Tue Dec 07 2021 04:12 PM
Joined: Dec 2015
Posts: 535
D
Unconventional Thinker
Thanks for sharing! I recently bought one of these thinking it was an Edelbrock Q-jet. I admittedly don't keep up on every single tiny detail of every manufacturer, so I was unaware that edelbrock hadn't made a q-jet in years. Theirs may have been better, but who knows. Anyhow, I bought a new M4MC for my '81 C20. It looked nice. I sent it back. I couldn't bring myself to install an inferior product on my truck. I like to work on it and have it run well, not tinker on it all the time to get it running well, and I had a feeling the chinesium c**p sitting atop my engine would be nothing but problems. So I opted to get a rebuilt Rochester instead. Reading the article I am glad I used my logic and sent it back. Just wish I had not bought it in the first place. But, we live and learn, well, most of us learn from our mistakes...lol... At least I got my money back sans restocking fee.


Shane

Shane's Toys...
2007 Forester XT Limited (2nd Owner)
1991 Cherokee Laredo (2nd Owner)
1981 Chevy 3/4 Ton Fleetside 8,600 Camper Special (3rd Owner)
1965 Chevy 3/4 Ton Fleetside (3rd Owner)
Re: Cheap new universal carburetors
carbking #1432659 Tue Dec 07 2021 04:34 PM
Joined: Nov 2002
Posts: 2,347
C
Carburetion specialist
DD - the edelbrock imitation Q-Jet wasn't a whole lot better, just like their imitation AFB's.

Jon.


Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify
If you truly believe "one size fits all" try walking a mile in your spouse's shoes!
[image]http://www.thecarburetorshop.com/Avatar.jpg[/image]
Re: Cheap new universal carburetors
carbking #1432661 Tue Dec 07 2021 04:36 PM
Joined: Jan 2014
Posts: 1,955
J
'Bolter
Originally Posted by carbking
JW - there are plenty of both available, one simply has to look. Sometimes instant gratification is not an option, one needs a wee bit of patience.

As to the Chinese knock-offs: if one has thousands of dollars of test equipment, and more thousands of dollars in spare parts, a lifetime of experience DESIGNING and repairing carburetors, and figures their time is worth absolutely NOTHING, then the Chinese knock-offs are cheap! wink

I linked Lars' post, as, along with Cliff Ruggles, they are the two most knowledgeble men of whom I am aware with Rochester Q-Jets.

Guessing someone that specializes in Zeniths could find about the same issues with the knock-offs.

But to each their own.

Jon

Yeah, I’m in no way defending the Chinese Zenith look-alike or suggesting that it’s impossible to find a good one barrel for your 235. But it’s easier for me to understand how someone could get tired of dealing with Rochester B’s, and impatient looking for a reasonably priced YF, Zenith, Stromberg etc. And out of that frustration take a chance on the offshore Zenith look-alike.

Q-Jets practically grow on trees by comparison. If one feels uncomfortable rebuilding oneself, it’s not hard to buy a rebuilt unit either. Or one from a running engine that is being removed for an LS swap, aftermarket EFI, etc.

Re: Cheap new universal carburetors
carbking #1432667 Tue Dec 07 2021 05:09 PM
Joined: Dec 2015
Posts: 535
D
Unconventional Thinker
Originally Posted by carbking
DD - the edelbrock imitation Q-Jet wasn't a whole lot better, just like their imitation AFB's.

Jon.

I had a feeling they wouldn't be, as the engineers that built the q-jets for specific applications knew what each one needed to run properly, not a one-sized-fits-all. Or as Jerry says it, one-size-fits-none...lol... I just finished reading the "Jebby" article, didn't see it last night. Now getting back into the "Lars" article. Interesting reading thus far from each article.


Shane

Shane's Toys...
2007 Forester XT Limited (2nd Owner)
1991 Cherokee Laredo (2nd Owner)
1981 Chevy 3/4 Ton Fleetside 8,600 Camper Special (3rd Owner)
1965 Chevy 3/4 Ton Fleetside (3rd Owner)
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