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Old 05-17-2009, 12:15 PM   #1
Z28-69
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Default Hesitation after landing of wheel stand

Hi guys could use some help with hesitation after a wheel stand. The car is carrying the wheels out about 50-55 feet and the hesitation is accuring when the cars front suspension is below static, not in the air. We have tube running from vent tube to vent tube, fuel pressure is at 7, flout levels are good. We tried raising them a touch and lowering them. Oh and yes we have bowl extentions. Pretty sure its a fuel problem, but maybe you guys can give me suggestions. Thanks Eric
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Old 05-17-2009, 01:05 PM   #2
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Default Re: Hesitation after landing of wheel stand

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Hi guys could use some help with hesitation after a wheel stand. The car is carrying the wheels out about 50-55 feet and the hesitation is accuring when the cars front suspension is below static, not in the air. We have tube running from vent tube to vent tube, fuel pressure is at 7, flout levels are good. We tried raising them a touch and lowering them. Oh and yes we have bowl extentions. Pretty sure its a fuel problem, but maybe you guys can give me suggestions. Thanks Eric
Fuel pump or ignition box. I chased this exact problem for several races and after changing carbs, jets and playing with fuel pressure, I replaced the igniton box and fuel pump and the problem went away. Neither parts have been back in the car since so I cant tell you which one fixed it.
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Old 05-17-2009, 01:28 PM   #3
Alan Roehrich
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Default Re: Hesitation after landing of wheel stand

Also, check your battery (or batteries) and cables VERY closely. If a battery has a loose plate, the "bounce" will cause it to short out or open intermittently. The "bounce" on landing is also likely to make every connection in the car try to move, so if one is weak, it will move.

By the way, if the battery has dual connections (top and side posts) be aware that those connections should be checked carefully as problems will hide there. Check ALL of your ground connections.
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Old 05-17-2009, 02:56 PM   #4
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Default Re: Hesitation after landing of wheel stand

Z-28

I'm sure you have jet extensions on the rear, but do you think the bowl extensions could be allowing them enough room to uncover? Just a thought.
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Old 05-17-2009, 03:59 PM   #5
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Default Re: Hesitation after landing of wheel stand

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Z-28

I'm sure you have jet extensions on the rear, but do you think the bowl extensions could be allowing them enough room to uncover? Just a thought.
Sorry, I have jet extensions not bowl extentions. Miss print
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Old 05-17-2009, 05:54 PM   #6
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Default Re: Hesitation after landing of wheel stand

Can you describe the hesitation? Does it bang, pop, or miss, or does the engine just loose power without any other sound? Does the symptom occur after the rebound/bounce or before?
I am thinking that if the ignition is crapping out you would experience a bang or pop when the engine comes back to life? Maybe Dave can further describe his situation to shed more light.
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Old 05-20-2009, 01:27 AM   #7
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Default Re: Hesitation after landing of wheel stand

Is this a Superstocker? If so, another idea to toss around is a wedge carb spacer.
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Old 05-20-2009, 10:17 AM   #8
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Default Re: Hesitation after landing of wheel stand

I had that same problem many years ago. As soon as it came down there was that ever so slight hesitation then it picked up & ran strong to the end. It turned out I needed that wedge plate as Jeff mentioned in the previous post. Probably was starving the secondaries at the top but I did not notice until it landed.
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