You where writing to Lori Harvey;
> Lori check the tag number on the Q-jet and see what size it is..also you
> might
> want to go back to the thermoquad if it's the older 600CFM unit. and try
I don't know about non-GM utilized Q-jets, but there is no tag on GM units.
There are only two flavors of q-jet, 750cfm (found on most everything), and
800cfm units, found on many big-blocks. 455 Buick motors have an 800cfm unit
typically.  The factory sets maximum airflow by limiting the air-valve
travel. Easily modified to get close to full flow from the carb.
The only way to tell a 750cfm q-jet from an 800cfm q-jet is to look up into
the primary bores.  
750cfm units have a pronounced "hump" running the circumferance of the bore
around the main venturi.  800cfm units have a very _slight_ "hump" in the
same area.
For WFOT running, swapping secondary metering rods is a good way to really
change the characteristics of the engine.  
Alex.
 | AmiQWK 2.7 - S/N 0261 |
... Enough is NEVER enough, and too much is just barely enough.
--- OLMS 2.60p.a1+ [EPMBP73M]
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