Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

Fine tuning Q-jet

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von:

--- Quote from: bob69 on May 22, 2022, 08:19:38 AM ---Von, well that makes things more complicated. All of the posts I've read about the 1986 monte say the CR vb is made with the same basic core vb used in the CZ. The CR vb can be made to perform like the CZ with minor mods like changing shift springs, line pressure and the governor to the CZ piece. The govenor mods you made should have result in some rpm increases.

What's confusing is that performance vbs in 1986 monte were marked by GM with pink paint and you say yours was not. Now I wonder if the changes I planned to mine will be worth it.

--- End quote ---
Mine could have pink paint on the VB, just maybe not visible in the photo I have. Mine has the Transgo shift kit in it so it has stiffer springs, etc. The gov mods did increase WOT shift rpm but just not quite high enough IMO. Maybe just needs more gov lightening. Since my stock 350 is all done about 4600 or so anyway it's not real far off. I don't feel like pulling the pan again anytime soon so it will do for now. I don't race it and don't go WOT that much.

73ss:
Mine did have the pink paint mark. Also had CZ stenciled on it in white.

77cruiser:
I don't know about a CR, if it's like a lot of other low perf. valve bodies it's almost impossible to get the shift points much higher.
The spool sizes are different in a hi perf valve body.
I had a OG & managed to get 6200 1-2 but 5800 2-3 & a bit under 5000 3-4.

bob69:
Von, send me a PM with your email and I'll send pics of my vb. The pink paint is obvious, so compare to yours. Hate to see you trying to modify the vb when/if it's one of the low performance models.

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