Q-jets

[SDT1DYI]

Originally Posted by Future Super Stocker

Can someone confirm measurements on the new q-jets? Any jet , rods, front and back. Hanger stamps. Bore and venturi size. I would be curious to have one if they are cost effective to buy. I would like to do surgery on one.

Thanks

Any QJet manufactured by Rochester is legal so long as the Venturi and throttle bore measures correctly for your combination .
750 CFM primary 1.090 x 2.250.
Any rods , hangar, jets. Choke blade must remain in place.

Merry Christmas Steve Teeter Stk/SS to 620

[Future Super Stocker]

I would think if they legalize the QF carb, the after market heads. Why not these Q-jets if the bore size and venturis are correct?

[MR DERBY CITY]

Originally Posted by Future Super Stocker

I would think if they legalize the QF carb, the after market heads. Why not these Q-jets if the bore size and venturis are correct?

Because they are FRICKEN Chinese JUNK , and we all know the Quality Control that comes from China ….

[Alan Roehrich]

Originally Posted by MR DERBY CITY

Because they are FRICKEN Chinese JUNK , and we all know the Quality Control that comes from China ….

Hear! Hear!


You're absolutely correct MJ. Already heard from some people. They're junk, and will not be approved.


Comparing those garbage chinese "carburetors" to the excellent quality product that Quick Fuel produced, or even the Edelbrock/Weber Q-Jets, is an insult to good quality part suppliers.

[SDT1DYI]

Originally Posted by MR DERBY CITY

Because they are FRICKEN Chinese JUNK , and we all know the Quality Control that comes from China ….

Has NHRA Tech Dept in writing stated they these Carburators are not Legal?
As to them being "Junk" , I have traveled in China, visited foundries and machine shops there. Almost every US company is there with some level of manufacturing. I recently purchased a new QF fuel pump, it lasted one race. It was junk. I returned it. I told them to keep it.
Poor QC is a production problem not always a location problem.

Steve Teeter Stk/SS 620

[Jeff Stout]

I have 1 on my bench. Trying to find time to dissect. Hopefully tomorrow. If anyone knows some measurements off the top of their head for a 750. Let know. Thanks

[Travis Miller]

As found in the NHRA specs sheets...

Throttle bore pri 1.375, sec 2.250

Venturi pri 1.093, sec AV