Currently the car has the edelbrock Q-jet replacement #1910 which is a 850 cfm carb. From everything I have read and seen this is probably a bit too much for my 350 which falls around 300 HP. The carb runs great and needs little/no tuning (not that I would know how to tune it) except for a very noticeable bog when it is floored off a stop, almost to the point of killing the car. Is this a situation where too much air is being pulled in and leaning it out? Pardon my ignorance on the subject but is there some tuning that could be done on the edlebrock? Or would I maybe be better off by going with a lower cfm performer or a maybe a demon? Thanks

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1982 Z28 Indy Pace Car
Stock Fiberglass hood
Balanced and Blueprinted 350
Holley Dominator Manifold
850 cfm Edelbrock Q-Jet
Accel Supercoil/Extreme 9000 wires
TH350/Transgo Shift Kit
Hedman Headers, no cat
currently in storage

 

Chris, the Qjet will work just fine on a 350, despite the "huge" airflow numbers.

Your bog can be easily tuned out of the carb. The #1910 variant of the Edelbrock carb is the "universal high performance" version. Unfortunately, the secondary rods they put in it aren't even as good as the rods they put in the "stock replacement" versions of the carb! Get a hold of a set of "DR" rods from Edlebrock or from your local GM parts counter and put 'em in. Your bog will magically disappear.

If it's not fixed completely then check your air valve tension spring and make sure it's not too loose or too tight. About 1/2 turn from the "zero tension" point is a good starting point.

Also, check the adjustment of the little pushrod that holds the secondary air valve closed. With the engine running you should be able to push the secondary air valve open abou 1-2* before the rod prevents it from moving further. Any more or less and you risk a bog situation. To adjust it you simply bend the rod slightly.

 

Thanks for the tips. I'll get a set of those rods and give them a shot when I head over to visit the car next month.

 

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[This message has been edited by The ODB (edited March 30, 2001).]

 

ROFL!!!!!!!!!!!

 

ODB, that's the beauty of the q-jet. It can be adjusted to handle anything from a 283 to a 454. A 350 is just about right for the primaries, though, so Damon is right - use it!

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/LB9 block, ZZ3 cam and intake, TBD heads, Hooker headers & y-pipe, 3" Catco cat).
57 Bel Air, my 1st car. 0.030 over 396, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.

 

57, ODB was kidding...lol

 

Close ODB- 12 mpg! Gotta love that OPEC!