Rat Bastid,
If you had bothered to read the OPs posts, it was pretty clear with the parts he already has & his budget, he just wants a mild performance increase & not a race engine.
Did you read the OP? He said he was looking at a 650 Holley. And IMO he should be. No one said a thing about a “race” engine, whatever that is. That is a typical cop out for a guy who has nothing else...it’s not a “race” engine and a 650 Holley is nothing like a “race” carb.
Of course you are not going to address what I said because it is all true & you have no answers.....& no clues.
YOU introduced the QJ into this thread, not me. I would not recommend a QJ for the OP because I get from the OP he is working on the KISS principle for his upgrade. The best carb in that case would be a Carter/Edel AFB or AVS. Reliable, easy to tune, great power with good mileage, will run for years without problems.
I introduced the QJ because of its adjustability. Far more than any other conventional carb I know of. It was an example of what he COULD do if he had a mind to tune something to the point of absurdity. I know of several guys who can tune a Holley to be as reliable, make more power than and get the same or better fuel mileage than any Carter/Brock carb.
Now to address some more of your BS:
- so you know of cars running 9 & 10s with QJs. Well why did you mention the single float bowl/single inlet needle as a 'problem'??? If they can run 9s, that takes a lot of fuel & obviously the fuel system is coping.
- the Holley doesn't address the issue that AFB/AVS carbs have....because they do not have any issues to address. Unlike blown PVs in Holleys or the high IFR position in newer Holleys that gives inconsistent idle response.
So much silly blather. The guys I know of running that fast on QJ’s still fight needle and seat issues. Most of them run that carb based on rules. And since you evidently don’t understand, it doesn’t take a “lot of fuel” to run 9’s. As to the blown Holley power valve myth, it is just that. As has been pointed out by Mattax and several others, the power valve gets blamed for tuning issues when it’s not the power valve at all. Again, maybe you should go to the carb forum and read through those posts and find the links and read them. If you believe Mike Urich and he rest you are still tuning the power valve incorrectly. You should know that, with all your experience. Lowering the IFR is simple. Even you could do it. There are cases where lowering the IFR isn’t needed either.
- how do you address fuel flow through the n/s on AFB?AVS/TQ/QJ. Your stupid answer: 'You don't'. Correct answer: you increase the n/s size, same as a Holley.
- apparently, you have never seen the inside of Carter 4 bbl. They have cavernous fuel bowl volume. The AFB/AVS/TQ comes with anti surge baffles. And they do NOT need jet extensions to keep the jets covered like some Holleys; or special vents to stop fuel spewing.