I have a 93 notch with a stock bottom end 302. Trickflow stage 1 cam and Trickflow twisted wedge heads. Victor Jr intake and a holley 670 street avenger carb. 3.73 gears with a 26" tire. It completely falls on its face at launch. is this carb that hard to tune in? should I just go for a holley 650 double pumper or 750? Or branch off away from holley? the car was running 12.6 (with the bog) at 109MPH and a horrible 1.9 60' (because of bog) thanks for the help
oh and one more thing..does anyone know what a set up like this should run? and or how much HP it is around to the wheels?
thanks again
problem with engine running right
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anothercrash
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Billjr
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Re: problem with engine running right
Sounds like you need bigger accelerator pumps, power valves, and or nozzles. Go to http://www.holley.com , there is a troubleshooting section. Good Luck. 
Last edited by Billjr on Wed Feb 04, 2009 11:06 am, edited 1 time in total.
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Billjr
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Re: problem with engine running right
From: www.holley.com
QUESTION: My vehicle has a stumble from a dead stop. What can I do to cure this?
ANSWER: The most common cause of a stumble is not having an adequate accelerator pump shot. The first thing to do is to look at the discharge nozzle and make sure you are getting a good strong pump shot. If not then you need to inspect the pump diaphram for a hole or tear. You will also need to make sure that the pump passage is clear from any trash or debris. First you will need to check the adjustment on the pump. To do this you will open the throttle all the way (WOT). Push the pump arm lever down and then adjust the pump override spring to obtain .015" clearance between the pump arm and lever. If you are having a stumble and no black smoke out the tailpipe then you will need to increase the shooter size. If it stumbles and you are getting black smoke from the tailpipe then it will be nessasary to decrease the shooter size.
QUESTION: I have a vacuum secondary carburetor that bogs when the secondaries come in. What will cause this?
ANSWER: Bogging and hesitation are caused by the secondaries coming in too quickly. You can install a heavier secondary spring and this will prevent the secondary from coming in too soon. If the engine is sluggish in response at full throttle then the secondaries may not be opening soon enough. You will then need to go to a lighter spring. The spring kit is part number 20-13 which will have 7 different springs to fine tune with.
QUESTION: My vehicle has a stumble from a dead stop. What can I do to cure this?
ANSWER: The most common cause of a stumble is not having an adequate accelerator pump shot. The first thing to do is to look at the discharge nozzle and make sure you are getting a good strong pump shot. If not then you need to inspect the pump diaphram for a hole or tear. You will also need to make sure that the pump passage is clear from any trash or debris. First you will need to check the adjustment on the pump. To do this you will open the throttle all the way (WOT). Push the pump arm lever down and then adjust the pump override spring to obtain .015" clearance between the pump arm and lever. If you are having a stumble and no black smoke out the tailpipe then you will need to increase the shooter size. If it stumbles and you are getting black smoke from the tailpipe then it will be nessasary to decrease the shooter size.
QUESTION: I have a vacuum secondary carburetor that bogs when the secondaries come in. What will cause this? ANSWER:
Bogging and hesitation are caused by the secondaries coming in too quickly. You can install a heavier secondary spring and this will prevent the secondary from coming in too soon. If the engine is sluggish in response at full throttle then the secondaries may not be opening soon enough. You will then need to go to a lighter spring. The spring kit is part number 20-13 which will have 7 different springs to fine tune with.-
anothercrash
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Re: problem with engine running right
ill give it a try...thanks!