Brian,
All Qjets were either 750 or 800 CFM. Most are the 750 CFM kind, with the 800's
only being used on some very big blocks like 455s and Caddy 500s. If you look
down the venturies of the primaries, the 750s have a little 'bump' around the
outside of the bore, where the 800's supposedly have a smooth wall in the
primary bores. I would bet you have the 750 kind, but it doesn't really matter
as the Qjet only uses as much air as it needs. That is one reason they are
considered the 'best engineered' carb out there. Of course, that makes them
more complicted also, so they get a bad rap.
Hope that helps,
Bill C.
Brian _ wrote:
> is there any way to tell the CFM on a Q-jet carb? i just installed a 600-CFM
> edelbrock carb. but i still have my Q-jet and would like to re-build it for,
> gallons per mile kind of performace, but would like to know the CFM on it. i
> have the numbers, but not with me, and i dont remember the year. but i can
> get it if anyone needs it to check on CFM for me.
>
> thanks,
> Brian M
> Atwater, CA
> '57 Chevy 3200
> '00 Dodge Neon
>
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