wheelstands

Everything from the motor to the wheels

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gmkmotorsports
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wheelstands

#1 Post by gmkmotorsports » Sun Sep 04, 2005 10:01 am

I have a 67 camaro 477bb round tube backhalf with stock frt end. It has a barry grant 400 pump and reg. Set at 28psi rear and 8psi frt. When the car wheelstand over a foot it stalls and drops like a rock. Can anyone help thanks.

one_fast_camaro
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#2 Post by one_fast_camaro » Sun Sep 04, 2005 11:27 am

It could possibly be the mounting position of the pump in relation to the outlet on the tank. The bg400 pump has very little suction and relies on gravity feed from the tank.

gmkmotorsports
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#3 Post by gmkmotorsports » Mon Sep 05, 2005 7:58 am

the pump is mounted right by the cell and I have -12 coming out of cell to pump and -10 from pump to reg and -8 to carb. Thanks

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John_Heard
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#4 Post by John_Heard » Mon Sep 05, 2005 10:36 am

I assume you think that it is dropping pressure, have you been able to confirm this via a dash mounted gauge or logger? I would not be surprised to see a momentary drop in psi at launch, but that shouldn't affect a carb that much since there is fuel in the bowl. Is this a nitrous launch or just carb only? Do you have rear jet extensions and the rear powervalve blocked off?

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Craig W.
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#5 Post by Craig W. » Mon Sep 05, 2005 8:42 pm

In addition to what has already be suggested, it could possibly be a fuel slosh issue. If the front float is high, it might be sloshing fuel from the bowl vent down the venturis.
Craig Watson
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gmkmotorsports
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#6 Post by gmkmotorsports » Mon Sep 12, 2005 4:27 pm

Thanks guys I think we found the problem. It not fuel related. The trans drip stick was no right. giving us false readings. So the trans was low on fluid and when the car would leave all the fluid would go to the back of the pan which uncover the pickup and make the front end drop like a rock. We found the problem by watching the tape of the car over and over. It was hard to tell but you could hear the rpms staying up when the car was coming down. So we started checking other things and thats what we found. Thanks again for your input.

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Craig W.
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#7 Post by Craig W. » Mon Sep 12, 2005 6:10 pm

Great catch. That certainly would be hard to find! Just goes to show what data can give you. The more the better.
Craig Watson
2QuickNovas Racing
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Carnivore Performance
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Rapp Racing
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sixty_foot
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share ??

#8 Post by sixty_foot » Mon Sep 19, 2005 9:45 am

what would be great......share the video with us !! :D
speed..... is how fast you hit the wall,
.....torque...... is how hard you bounce off

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