quote:Originally posted by Bumblebee13:
It had a .30 in it from holley
Any time you have a hesitation or a bog down it means you need more fuel not less.
Too much fuel almost never causes a hesitation. It takes a ton of excess fuel to cause that, so much you would notice a ton of black smoke out the exhaust and even liquid gasoline out the exhaust.
So you can be almost certain: a hesitation = a lack of fuel
So if you have a hesitation as you crack the throttle open you still need more accel pump shot.
Is the accel pump working now ? Is it shooting fuel out in a stream that hits the booster venturi ?
If it does: Have you adjusted the accel pump override spring so it is touching the small accel pump arm slightly depressing it and with no slack between the two (forget the feeler gauge routine) .
You want the pump to shoot with even the slightest movement.
Try a 35 shooter or even a 40 shooter. I used a 40 on a Holley when i was running one.
Holley carbs are made for Chevys by people with a Chevy mindset. Consequently their fuel curves are more suited to Chevs and not the more obscure (in the states) 351 Cleveland. So Holleys generally speaking don't shoot enough fuel in off the line for a 351c and so you have the off idle bog.
Ultimately i needed to make up a custom accel pump cam for the Holley i used.