Engine guru question?
Thread Starter
Pro
Joined: Jul 2001
Posts: 704
Likes: 10
From: Blairsville Ga
Engine guru question?
What would make the odd bank 13579 run allot hotter then the even side? The car idles fine, so it's kinda odd to me. Any suggestions on what’s going on I would appreciate. I am getting fire on all pistons.
Thanks
Thanks
Le Mans Master
Joined: Dec 2007
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From: McHenry Illinois
Race Director
Joined: Jul 2001
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You have too many cylinders on that side of the engine. Remove one (possibly #9) and keep it as a spare. 
If you're measuring temps at idle, the numbers are meaningless. Pay attention to spark plug readings instead. Or just close the hood and stop worrying.
If you're measuring temps at idle, the numbers are meaningless. Pay attention to spark plug readings instead. Or just close the hood and stop worrying.
Thread Starter
Pro
Joined: Jul 2001
Posts: 704
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From: Blairsville Ga
it's like the even side is not hitting at all. You can touch the headers after running for a few minutes, but the odd side will burn the crap out of you. Temp reading even side 85-100, temp readings odd 150-250. I've done something wrong
Le Mans Master
Joined: Jun 2008
Posts: 5,284
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From: Rockledge FL
where can i get one of those v10 corvettes ( i am guessing 2468and10) are on the other side 
i am guessing that its not the odd side that is the problem
it is supposed to burn you if you touch it.
the fact that you can touch the even side is the problem
i am guessing that its not the odd side that is the problem
it is supposed to burn you if you touch it.
the fact that you can touch the even side is the problem
Former Vendor
Joined: Nov 2006
Posts: 2,482
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From: Carmichael ca
If it were only running on 4 cyls it would idle really rough. What kind of intake manifold are you running? Most 180* intakes have 1 half of the carb supply 2 cyls on 1 side and 2 cyls on the other.
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Burning Brakes
Joined: Jan 2003
Posts: 755
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From: Roswell Georgia
Check Your Water Jacket Flow
My first inclination is that something is interfering with the water jacket flow on the hot side. (You didn't say how long this has been a problem nor if you made any changes to the engine before you first noticed it, so this is a SWAG.)
I don't think that your carburetor is the source of the problem as a divided plenum intake manifold doesn't feed all the cylinders on the same side. Even with an open plenum intake manifold, it would be difficult to lean out one cylinder head and not the other. (Had plenty of problems w/BBC and stagger jetting in the past to know that usually one or two different cylinders can be too lean, but never the entire side.)
Please keep us in the loop as you tackle the problem. Good Luck!
I don't think that your carburetor is the source of the problem as a divided plenum intake manifold doesn't feed all the cylinders on the same side. Even with an open plenum intake manifold, it would be difficult to lean out one cylinder head and not the other. (Had plenty of problems w/BBC and stagger jetting in the past to know that usually one or two different cylinders can be too lean, but never the entire side.)
Please keep us in the loop as you tackle the problem. Good Luck!
Race Director
Joined: Apr 2000
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
My first inclination is that something is interfering with the water jacket flow on the hot side. (You didn't say how long this has been a problem nor if you made any changes to the engine before you first noticed it, so this is a SWAG.)
I don't think that your carburetor is the source of the problem as a divided plenum intake manifold doesn't feed all the cylinders on the same side. Even with an open plenum intake manifold, it would be difficult to lean out one cylinder head and not the other. (Had plenty of problems w/BBC and stagger jetting in the past to know that usually one or two different cylinders can be too lean, but never the entire side.)
Please keep us in the loop as you tackle the problem. Good Luck!
I don't think that your carburetor is the source of the problem as a divided plenum intake manifold doesn't feed all the cylinders on the same side. Even with an open plenum intake manifold, it would be difficult to lean out one cylinder head and not the other. (Had plenty of problems w/BBC and stagger jetting in the past to know that usually one or two different cylinders can be too lean, but never the entire side.)
Please keep us in the loop as you tackle the problem. Good Luck!
However I would make sure the idle mixture screws are all turned out the same number of turns 
Thread Starter
Pro
Joined: Jul 2001
Posts: 704
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From: Blairsville Ga
I'm getting spark on all 8. I've taken every spark plug out just to make sure they are firing. So I'm getting spark but acually no fire. I hope that answers your question Mike. I'm running a Stealth intake and a holley 750. This is a new build and the first time the engine has been started. I've just ordered a new HEI dist so maybe that will help. The engine is bored 30 over edelbrock RPM heads, 1/6 rollers, holley 750, new 8MM plug wires along with plugs and stealth intake. I hope I didn't leave anything out.
Race Director
Joined: Apr 1999
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From: CORVETTE 77 385 C.I. TEXAS
350 C.I or 400 C.I. ?
I suppose you adjusted the carb mixture.
Weiand has made a single plane intake w/ a divider that could make one side hotter than the other.
I suppose you adjusted the carb mixture.
Weiand has made a single plane intake w/ a divider that could make one side hotter than the other.
Last edited by Ganey; Sep 17, 2009 at 06:55 PM.
Pro
Joined: Jan 2009
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Maybe the valve lash was not finalized on one side
Exhaust valves not closing all the way and mixture is burning on the way down the pipe.
High EGT's can be the result of :
- Lean mixtures
- Retarded timing
Since it's only one bank I don't think it can be the cam either.
If the cam is installed incorrectly, like a couple of teeth off it would affect both banks.
Race Director
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Also you need to seat the rings properly and I don't want to get into a ring seating debate here.