Too Slow/Q-Jet question

[JP1738]

Originally Posted by Doug Hoven

Q-jets aren't really "cut and dry" across the board. Some carbs are good with a little work, and others are slow no matter how much effort is thrown at them. If the money isn't there to send a carb out to be built by one of the "gurus," then I would suggest buying the Quadrajet book by Cliff Ruggles. I surprised myself with how much I was able to accomplish with some basic mods to a bone stock Q-Jet. I believe what was meant by a "fast throttle plate" means the linkage was made to open the primaries and secondaries at the same time, unlike the stock progressive linkage that opens the primaries a decent amount first before opening the secondaries. The 1-1 linkage carbs tend to not drive around as well, but some swear by them being faster. As far as tuning goes, the car will tell you what it likes and doesn't like. MSDs can cause plugs to look good even when things aren't so good. I would suggest taking some "swings" at jetting, rods, and trying a few different hangers if you have some. Even if what you already have ends up being the best, at least you'll learn something.

I really like this attitude. I'm absolutely not above trying to make changes. Like you said, at the very least I might learn something. I do not have any extra hangers or rods to try though, do you know where I can get more components to try?

[MR DERBY CITY]

Just gonna give it to you straight …. Just because your car runs close to the 1/8 mile index DOES not mean it will run close to the 1/4 mile index AND have you weighed the car yet ??? Number two ..:: stockers are all about RING SEAL .. just remember that. … Cheers…..

[JP1738]

Originally Posted by MR DERBY CITY

Just gonna give it to you straight …. Just because your car runs close to the 1/8 mile index DOES not mean it will run close to the 1/4 mile index AND have you weighed the car yet ??? Number two ..:: stockers are all about RING SEAL .. just remember that. … Cheers…..

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