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#1 |
Registered User
Join Date: Nov 2008
Location: Columbia SC
Posts: 231
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I had to take my truck back to muffler shop today to have it checked out and the gaskets were burned out where they connect to exhaust manifolds. He told me the timing was off and running hot. He said that because of that the gaskets burned away and the galvanized pipe had the galvanize burn off as well up near the manifolds. It has been two months the pipes have been on.
Has anyone ever heard of that? I set timing today at 8% and the RPMs at 600. It seems to be running better. When I took air breather off the top of carburetor it was black would timing cause this or do I need to adjust the carbs?
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Chief mechanic for my, 54 Belair, 64 Corvair, 72 C/10Fleetside and 2002Tahoe. John 14:6 Jesus said, "I am the way, the truth, and the life. No one comes to the Father except through Me. My Book "Why Cancer is Not Bad Luck" by WestBow press |
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#2 |
Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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Re: question about timing and mufflers ??
i dont think ive ever heard of that before
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-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME |
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#3 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: question about timing and mufflers ??
if a motor is running lean and not timed right ,i've seen manifolds and exhaust pipes golow cherry red
you say carbs tuned?? does that mean you're running multicab setup?
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#4 |
Between Trucks...
Join Date: Mar 2002
Location: Los Angeles, CA.
Posts: 3,830
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Re: question about timing and mufflers ??
If your timing is retarded, exhaust will run hot.
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#5 |
Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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Re: question about timing and mufflers ??
that is true if its to lean it will run hot
__________________
-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME |
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#6 |
Registered User
Join Date: Nov 2008
Location: Columbia SC
Posts: 231
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Re: question about timing and mufflers ??
No, only one carb but I was not sure what made top of carb black.
That means it was getting too much fuel right?
__________________
Chief mechanic for my, 54 Belair, 64 Corvair, 72 C/10Fleetside and 2002Tahoe. John 14:6 Jesus said, "I am the way, the truth, and the life. No one comes to the Father except through Me. My Book "Why Cancer is Not Bad Luck" by WestBow press |
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#7 |
Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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Re: question about timing and mufflers ??
what part of the carb is black?
the top outside or inside under the choke plate?
__________________
-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME |
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#8 |
Cruzin
Join Date: Dec 2009
Location: on the road
Posts: 2,835
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Re: question about timing and mufflers ??
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#9 |
Registered User
Join Date: Nov 2008
Location: Columbia SC
Posts: 231
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Re: question about timing and mufflers ??
the top outside of carb and around on the inside of the air breather holder.
__________________
Chief mechanic for my, 54 Belair, 64 Corvair, 72 C/10Fleetside and 2002Tahoe. John 14:6 Jesus said, "I am the way, the truth, and the life. No one comes to the Father except through Me. My Book "Why Cancer is Not Bad Luck" by WestBow press |
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#10 | |
Cruzin
Join Date: Dec 2009
Location: on the road
Posts: 2,835
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Re: question about timing and mufflers ??
Quote:
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#11 |
Registered User
Join Date: Aug 2009
Location: Simi Valley, CA
Posts: 193
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Re: question about timing and mufflers ??
Sinister is correct, retarded timing causes unburned gas to continue burning as it is going out the exhaust, which heats it up considerably.
The lean thing is a misconception. At stoichiometric mixture, meaning there is the perfect amount of gasoline to burn all the oxygen in the cylinder, it burns hottest. Any richer or leaner it will be cooler than that. At very high power settings, like going up a long hill, it can be beneficial to run a little rich to keep things cool. At cruise, where power is low, you can run quite lean with no ill effects. |
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