Too Slow/Q-Jet question

[JP1738]

Originally Posted by Bobby Lundholm

I have a metric 200 that was originally built by Turbo Action that Leon Miranian is rebuilding it right now if you are interested. $2,800. Check to see what your converter is flashing to.

Tough to say what it flashes at on the hit as first gear is so short, but it falls back to around 5100 on the gear changes. Might be in touch about the trans though, thank you for the heads up. Will the converter and shifter work for that transmission swap as well?

[Bobby Lundholm]

Originally Posted by JP1738

Tough to say what it flashes at on the hit as first gear is so short, but it falls back to around 5100 on the gear changes. Might be in touch about the trans though, thank you for the heads up. Will the converter and shifter work for that transmission swap as well?

Your shifter should work depending on what you have. Converter will not work as the trans is set up for a metric input. Get ahold of Leon Miranian on the carb as well. He does all of my stuff.

[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.

[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?

[Doug Hoven]

Originally Posted by JP1738

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?

Apart from asking around the racing community, there are a few places to buy qjet parts. I bought primary jets, secondary rods, and needle and seats through jegs, with the brand being "JET Performance." Ebay is also a good resource for hangers, jets, and rods. Something I've seen done is if you don't use primary rods, you can screw in Holley jets in place of the rochester jets. The threads are very close, but not identical. This is not advised if you ever want to try rochester jets and primary rods ever again. So far I've only ever 2 stepped with a qjet. If you ever decide to "chill down" your engine, make sure to try it first when it isn't important. Especially footbraking, qjets sometimes need a little different tuneup when trying to leave the line at very cold engine temps.

[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.

[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

[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.