Senior Tech Team
Join Date: Mar 2004
Location: Shippensburg, PA
I have a '69 Impala 235/327 in my Chevy II. Engine is mostly stock, with a performer intake, GK 200/210 @ 0.050 cam, and 1.5" headers.
I was running an 1850 Holley 600 cfm, and I replaced it with a Q-jet from a '79 305 that I rebuilt, and tuned. Car seems to run much better with the Q-jet... throttle is much more responsive, and it seems to pull harder up top.
Even the lightest spring in the vaccum secondaries on the Holley would not cause a bog, and I am not certain my secondaries were even working. Never did figure that one out, and maybe it was just a problem with MY particular 1850. Regardless, I prefer the better part throttle metering of the Q-jet, and I had one laying around, so I yanked the Holley and never looked back. [img]smile.gif[/img]