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motor wants to die

 
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Dr350
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Joined: 08 Feb 2006
Posts: 3
Location: Belle plain MN
211.20 points



PostPosted: Mon Jul 17, 2006 11:38 pm    Post subject: motor wants to die Reply with quote

just put a new rebuilt motor in my race car. The problem is when I go to put it in gear the motor wants to fall on its face, and I have to play with the throtle, I have played with timming and carb. The cam is a howards cam It has a 410 lift 284 duration 222 at 50" I was told that it might be my torque converter. The motor runs great when out piss pounding on it . just does not idle in gear. This is a circle track car. And it has a 2brr carb. motor is a 350 40' over flat top balanced. Any ideas????
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af2
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Joined: 01 Sep 2003
Posts: 5558
Location: grassvalley, ca
71227.76 points


1933 Willys Coupe

PostPosted: Mon Jul 17, 2006 11:46 pm    Post subject: Re: motor wants to die Reply with quote

Dr350 wrote:
just put a new rebuilt motor in my race car. The problem is when I go to put it in gear the motor wants to fall on its face, and I have to play with the throtle, I have played with timming and carb. The cam is a howards cam It has a 410 lift 284 duration 222 at 50" I was told that it might be my torque converter. The motor runs great when out piss pounding on it . just does not idle in gear. This is a circle track car. And it has a 2brr carb. motor is a 350 40' over flat top balanced. Any ideas????



Rule of thumb= 500rpm in gear for a street car.
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artinla
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Joined: 09 May 2006
Posts: 233

8558.30 points


1971 Chevrolet Nova

PostPosted: Tue Jul 18, 2006 12:10 am    Post subject: Reply with quote

You said rebuilt.. Was this carb idling OK before? The cam is small enough that idling in gear shouldn't be an issue, even with a stock converter.

If the carb is known to be good, I suspect that you have a vacuum leak. Maybe an intake gasket, or maybe someone missed a hose or fitting when you reinstalled the engine. Check that the vacuum modulator is still connected underneath the car. It is pretty common that the hard line pushes the hose off of the modulator when reinstalling an engine. I do know that some racers don't run a modulator, so that is only mentioned as a possibility.

Spray some carb cleaner or a propane torch around the base of the carb with the engine running and see if the engine speeds up. If you have a leak, you will get an increase in rpm when you spray the affected area.
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af2
Member


Joined: 01 Sep 2003
Posts: 5558
Location: grassvalley, ca
71227.76 points


1933 Willys Coupe

PostPosted: Tue Jul 18, 2006 2:01 am    Post subject: Reply with quote

artinla wrote:
You said rebuilt.. Was this carb idling OK before? The cam is small enough that idling in gear shouldn't be an issue, even with a stock converter.

If the carb is known to be good, I suspect that you have a vacuum leak. Maybe an intake gasket, or maybe someone missed a hose or fitting when you reinstalled the engine. Check that the vacuum modulator is still connected underneath the car. It is pretty common that the hard line pushes the hose off of the modulator when reinstalling an engine. I do know that some racers don't run a modulator, so that is only mentioned as a possibility.

Spray some carb cleaner or a propane torch around the base of the carb with the engine running and see if the engine speeds up. If you have a leak, you will get an increase in rpm when you spray the affected area.


I am going to leave it to Art. He is the one I would talk to going Left!!!!!!!!
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Rick 5150 69
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Joined: 08 Apr 2004
Posts: 52
Location: Sac, Calif
1187.42 points


1937 Ford Business Coupe

PostPosted: Wed Jul 19, 2006 8:14 pm    Post subject: Reply with quote

Artinia said

Quote:

Spray some carb cleaner or a propane torch around the base of the carb




We`re all assuming you mean an unlite torch.......! Shocked
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