View Full Version : Quadrajet calibration
As previously posted, I am having some driving problems with my 78 Trans Am. I have removed the carb and dismantled it this afternoon. Car has a rebuilt 400 + 0.030" with a Comp extreme (268 I think) cam, Crane fast bleed lifters, #16 heads (about 9.6:1 cr) and an original set of Tri-Y headers.
Primary jets are #71 and rods are 41K (tips measure 0.025").
Secondary rods are BE. (Tips measure 0.042")
Maybe someone can walk me through what I need to change and look at next.
Where can I get jets and rods for these carbs?
As previously posted, I am having some driving problems with my 78 Trans Am. I have removed the carb and dismantled it this afternoon. Car has a rebuilt 400 + 0.030" with a Comp extreme (268 I think) cam, Crane fast bleed lifters, #16 heads (about 9.6:1 cr) and an original set of Tri-Y headers.
Primary jets are #71 and rods are 41K (tips measure 0.025").
Secondary rods are BE. (Tips measure 0.042")
Maybe someone can walk me through what I need to change and look at next.
Where can I get jets and rods for these carbs?
455firebird1969
11-22-2004, 06:46 PM
This outfit has worked good for me...
Carbs unlimited
http://www.carburetion.com/
Larry Navarro
11-22-2004, 07:02 PM
knock out the 1/4" aluminum plug from the airhorn so that you can adjust the APT.
Make sure the choke pull-off diaphram will hold a vacuum.
Trev, can you give a Hg figure at idle?
Skip Fix
11-22-2004, 07:12 PM
I'd fatten it up a little to 73 and 43s. See how the piston glides. You may need a softer spring with a little bigger cam depending on the vacuum. Edelbrock ha a kit for later model Q jets.