I picked this up Today
02-02-2019, 11:41 AM
#21
I take it this is your first vehicle with a carb?
02-02-2019, 02:49 PM
#22
Senior Member
650 cfm is a bit too high for a mostly stock 302. The 85GT had a 550 CFM Holley from the factory, and I put a 650 Edelbrock on it. I had to have my Buddy's Dad re-jet it and mess with accelerator pump to make it run right. The nice thing about Edelbrock carbs is, almost everything is external, and they run really consistent.
Just an FYI....
But yeah, your accelerator pump needs adjusted.
Just an FYI....
But yeah, your accelerator pump needs adjusted.
02-02-2019, 03:09 PM
#24
Senior Member
Thread Starter
650 cfm is a bit too high for a mostly stock 302. The 85GT had a 550 CFM Holley from the factory, and I put a 650 Edelbrock on it. I had to have my Buddy's Dad re-jet it and mess with accelerator pump to make it run right. The nice thing about Edelbrock carbs is, almost everything is external, and they run really consistent.
Just an FYI....
But yeah, your accelerator pump needs adjusted.
Just an FYI....
But yeah, your accelerator pump needs adjusted.
02-02-2019, 06:35 PM
#25
Senior Member
Unless it's leaking fuel, which is pretty unlikely because all of the gaskets are above the fuel level, you can pretty much re-jet that thing on the car. They don't make as much power as a Holley will, but the trade-off of more predictable driving is what sold me.
02-07-2019, 12:31 PM
#26
Senior Member
Thread Starter
Changed out the accelerator pump and the jets above the floats and it seems to have helped. Now its not an eternity between jumping the pedal and power hook up up there still is a stall and a popping and grumbling. I’ve changed around the armature points and it all seems to be about the same.
Also found an old invoice on the carburetor. Its a 600CFM
Also found an old invoice on the carburetor. Its a 600CFM
02-07-2019, 12:33 PM
#27
Changed out the accelerator pump and the jets above the floats and it seems to have helped. Now its not an eternity between jumping the pedal and power hook up up there still is a stall and a popping and grumbling. I’ve changed around the armature points and it all seems to be about the same.
Also found an old invoice on the carburetor. Its a 600CFM
Also found an old invoice on the carburetor. Its a 600CFM
02-07-2019, 09:49 PM
#28
Senior Member
Yeah... sounds like maybe your timing is off. Start at 10 BTDC, then slowly advance it 1 degree at a time. I believe my carbed 85 GT ran best at 12 BTDC, while my 89 GT likes 14 BTDC. Lots of factors there, but 10 BTDC is base timing.
02-08-2019, 07:55 PM
#29
Senior Member
Nvm
02-08-2019, 08:51 PM
#30
Senior Member
Disregard