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Race gas aluminum head corrosion?
#1712269
12/18/14 03:28 PM
12/18/14 03:28 PM
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Joined: Jul 2005
Posts: 1,301
Penna
70satelliteguy
OP
pro stock
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OP
pro stock
Joined: Jul 2005
Posts: 1,301
Penna
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My setup is currently at the machine shop. They informed me that my aluminum heads have some corrosion in the exhaust ports from using RACE gas.Intake ports are clean. They said it is pretty common. Should I be worried? I run Sunoco 112 with 13.5 compression and 35 degrees of timing. Mike 
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Re: Race gas aluminum head corrosion?
[Re: ProSport]
#1712273
12/18/14 05:23 PM
12/18/14 05:23 PM
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Joined: Jul 2005
Posts: 1,301
Penna
70satelliteguy
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pro stock
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pro stock
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Posts: 1,301
Penna
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"It use to freak me out every time I had my 451 apart, heads looked terribly corroded on the intake and the exhaust sides, and they were cnc ported/polished. It looked like chunks of aluminum were sand blasted off. Motor ran 9's for many years though and plugs always looked good. " Prosport, mine are only corroded on the exhaust but also some in the combustion chamber also. Pretty much everywhere the gas is being burnt.  This is a race car only and I do use Nitrous a few time a year but only up to 250 HP shot and it is a conservative tune up with plenty of timing retard. It does have a sand blasted look to it!  My plugs always look good. Mike
Last edited by 70satelliteguy; 12/18/14 05:25 PM.
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Re: Race gas aluminum head corrosion?
[Re: 70satelliteguy]
#1712274
12/18/14 05:36 PM
12/18/14 05:36 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
"It use to freak me out every time I had my 451 apart, heads looked terribly corroded on the intake and the exhaust sides, and they were cnc ported/polished. It looked like chunks of aluminum were sand blasted off. Motor ran 9's for many years though and plugs always looked good. "
Prosport, mine are only corroded on the exhaust but also some in the combustion chamber also. Pretty much everywhere the gas is being burnt.
This is a race car only and I do use Nitrous a few time a year but only up to 250 HP shot and it is a conservative tune up with plenty of timing retard.
It does have a sand blasted look to it!
My plugs always look good.
Mike
I don't think it's from the gas, it's from condensation. IMO
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Re: Race gas aluminum head corrosion?
[Re: 70satelliteguy]
#1712276
12/18/14 06:13 PM
12/18/14 06:13 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
"I don't think it's from the gas, it's from condensation. IMO "
Challenger could you elaborate 
Thanks Mike
Aluminum heads condensate much more than iron heads. Being a race engine it has a lot heating and cooling cycles which leave moisture. Then it sits and corrodes.
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Re: Race gas aluminum head corrosion?
[Re: Challenger 1]
#1712277
12/18/14 06:28 PM
12/18/14 06:28 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
"It use to freak me out every time I had my 451 apart, heads looked terribly corroded on the intake and the exhaust sides, and they were cnc ported/polished. It looked like chunks of aluminum were sand blasted off. Motor ran 9's for many years though and plugs always looked good. "
Prosport, mine are only corroded on the exhaust but also some in the combustion chamber also. Pretty much everywhere the gas is being burnt.
This is a race car only and I do use Nitrous a few time a year but only up to 250 HP shot and it is a conservative tune up with plenty of timing retard.
It does have a sand blasted look to it!
My plugs always look good.
Mike
I don't think it's from the gas, it's from condensation. IMO
 ... corrosion on alum is from water
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Re: Race gas aluminum head corrosion?
[Re: MR_P_BODY]
#1712278
12/18/14 07:15 PM
12/18/14 07:15 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Just don't lick the head and you will be fine I see it when folks bring engines and or heads that have been sitting a long time or sitting in damp trailer etc Water/ weather not fuel IMO Clean 'em up keep moving no worry
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