secondary carb problem
05-25-2008, 07:30 AM
#1
Senior Member
DYNO TECH
Thread Starter
Join Date: Aug 2007
Location: Colebrook Connecticut
Posts: 425
secondary carb problem
my carb is a holley 750 DP
primaries are good but if im cruising and punch the throttle I get some breaking up or stumble initially then itll hook up?
im thinking more pump shot or bigger shooter?
primaries are good but if im cruising and punch the throttle I get some breaking up or stumble initially then itll hook up?
im thinking more pump shot or bigger shooter?
05-25-2008, 06:15 PM
#2
Senior Member
RACING JUNKIE
Join Date: Sep 2007
Location: Belleville, IL
Posts: 658
Lean is usually a hesitation and can even backfire out of the intake when the secondaries open until the main venturis have enough vacuum.
Fat is usually a breaking up, with black smoke and backfires out the exhaust.
You may have too much or too little accelerator pump.
Fat is usually a breaking up, with black smoke and backfires out the exhaust.
You may have too much or too little accelerator pump.
05-27-2008, 05:08 AM
#3
Senior Member
DYNO TECH
Thread Starter
Join Date: Aug 2007
Location: Colebrook Connecticut
Posts: 425
I havent noticed black smoke.
I had a problem with the primaries before and fixed it by flipping the pink cam around and readjusting the pump arm for .015 at WOT.
that gave me a huge initail pump shot then tapered off.
might aswell try that on the secondaries too.
I had a problem with the primaries before and fixed it by flipping the pink cam around and readjusting the pump arm for .015 at WOT.
that gave me a huge initail pump shot then tapered off.
might aswell try that on the secondaries too.
