Too Slow/Q-Jet question

[Mike Pearson]

Quadrajet parts.com has some rods and hangers last time I looked. Also if there is a carb rebuild shop anywhere near your location they might have a stock of them. They are getting more difficult to find.

[Danny Ashley]

Q-Jet builder Mike McDonald will be at Orlando. He will be crewing for Kevin Wells. Kevin has a blue G/SA Nova #3106. Mike will have parts and will get you steered in the right direction.

[Mark Yacavone]

Originally Posted by JP1738

D2, and don't mind the ambiguous profile.
If you need any more info please send me a PM, I don't want to hash every minute detail of the car out and make the entire forum listen, but I do genuinely appreciate all the people who have reached out or chimed in!

My comment here would be that the more info you share here, the more feedback you'll get.
There are many other ways to pick up some ET besides in the Q Jet.
Of course Mark Lewis can help with that ,as can Mike McDonald

[MR DERBY CITY]

Originally Posted by JP1738

I have the car at race weight. Weighted class is N/SA and for my combo according to class racer info that's 3534 with me in it. Currently have it at 3560 with my 4 corner scales.

Mark Lewis put the engine together for me, I think he did a great job with what he had and I trust the rings are sealing properly. I haven't noticed any extra blow-by, the valve cover breather has 0 signs of oil comin out of it after 4 1/8 mile passes.

Also, I understand that this car will not backhalf and pick up time in the 1/4. I figured I'd have to go at least .10 to .15 under the 1/8 mile index to get under the 1/4 mile 13.00 index for N/SA

Well, you are in pretty good hands with Mark helping you. On top of that he is a great guy….Cheers.

[a pontiac]

You need to try another q-jet for comparison, I thought I had a good one, borrowed another and was 2 tenths quicker. Also, most jet tuning is with secondary rods.

[Mike Jones]

What Model is your 1980 Chevrolet?

[Adger Smith]

I'm not a real Q-Jet tuner, but I question the 6.5 lb fuel pressure.
N/S area vs the small float
What do the experts say about that?
I have had Q-Jet customers that are very particular about regulator location and fuel line routing to the carb...
OK What you say Q-Jet experts??

[Mike Pearson]

Originally Posted by Adger Smith

I'm not a real Q-Jet tuner, but I question the 6.5 lb fuel pressure.
N/S area vs the small float
What do the experts say about that?
I have had Q-Jet customers that are very particular about regulator location and fuel line routing to the carb...
OK What you say Q-Jet experts??

6-6.5 PSI is what I run for fuel pressure. You need minimum 1 gallon of fuel delivery at the carb in less than 30 seconds. I run a Magna Fuel regulator dead head with #8 line from the cell to the carb. Regulator is mounted on the fenderwell I have one of those Chinese summit pumps that is similar to a holley blue pump. I have run 9.90 with my set up. My carb was built by Jim Boburka.

[Cdncarnut]

I have 2 spare Q-jets in my trailer, plus the one on the car, built by the 3 major builders, two of whom have now retired.

I have actually had a case where a carb ran great two weeks ago, would not qualify the car.
Yet, the carb which ran like poop 2 weeks earlier, ran the best ET ever.

I also have one which will get my down the track, significantly under the index, every time.

Getting the rods and hanger correct for race day can be a challenge.

There is no easy answer and really no cheap solution.

[JP1738]

Originally Posted by Adger Smith

I'm not a real Q-Jet tuner, but I question the 6.5 lb fuel pressure.
N/S area vs the small float
What do the experts say about that?
I have had Q-Jet customers that are very particular about regulator location and fuel line routing to the carb...
OK What you say Q-Jet experts??

I also have an inline fuel filter after the regulator between that and the carb. Tim Stick advised I 86 that and he's probably right. I put it there because the car had been sitting for a long time and there was a bunch of gunk and trash in the tank and line. I cleaned and flushed everything best I could, but I stuck a filter on it to catch anything I missed just to be safe. I plan to remove that as soon as I get to work on the car again.