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Old 04-12-2011, 11:42 AM
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Help Chevy INLINERS!!!!!!!!!

Hi I have a Chevy 250 inline 6 cylinder that im building and Im looking to get a little more compression. Does anyone know where i can get like a .015 head gasket? Steel shim type gasket for my engine? Thanks! Neil.

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Old 04-12-2011, 12:31 PM
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Even a .020 Would work or maybe a little thicker... something smaller than .041 Thank you!!!
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Old 04-12-2011, 01:30 PM
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Even if you find one, it probably won't make a difference that you could feel in the seat of your pants.
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Old 04-12-2011, 03:32 PM
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Quote:
Originally Posted by techinspector1
Even if you find one, it probably won't make a difference that you could feel in the seat of your pants.
You would be suprised. You can change almost .5 compression ratio with just the head gasket.
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Old 04-12-2011, 06:14 PM
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I believe the thinnest MLS you can get from COMETIC is .027" compressed, give them a call, they'll cut just about anything for you. They're pricey, as in $125 and up per side for a SBC, but I've used them in my blower motors with good results.
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Old 04-12-2011, 06:47 PM
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Quote:
Originally Posted by Mud1m
You would be suprised. You can change almost .5 compression ratio with just the head gasket.
No, I probably wouldn't be surprised. Each change of a whole compression number, such as 8.0:1 changed up to 9.0:1, or 9.0:1 up to 10.0:1 will add 4% power. A 1/2 point change, therefore, will add 2% power. On a 200 hp motor such as the OP has (and I'm being generous here) will result in a gain of 4 hp. I have been around this hobby long enough to know that I'm not going to feel a 4 hp increase in the seat of my pants.
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Old 04-12-2011, 07:01 PM
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Quote:
Originally Posted by techinspector1
No, I probably wouldn't be surprised. Each change of a whole compression number, such as 8.0:1 changed up to 9.0:1, or 9.0:1 up to 10.0:1 will add 4% power. A 1/2 point change, therefore, will add 2% power. On a 200 hp motor such as the OP has (and I'm being generous here) will result in a gain of 4 hp. I have been around this hobby long enough to know that I'm not going to feel a 4 hp increase in the seat of my pants.
I wouldnt touch a steel shim gasket anymore. Pulled my IMCA stock engine apart this winter, had steel shim gaskets in it, and it was JUST ABOUT to fire slot between 3&5. Just because the shim blew out. Another 3-4 laps and the block would of been JUNK! Just good reassurance to run a thicker head gasket.

And like tech said, he is always full of good knowledge, a 2% difference wont be felt.
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Old 04-12-2011, 08:27 PM
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Help Chevy inliners...

Mud1m,
I's try three sources that may help you. All are specialists in old Chevy parts and performance products. 1) The Filling Station in Lebanon. OR. 2) Patrick's Antique Cars, Phoenix, AZ and 3) Chevysoftheforties.com in Vancouver, WA. All have a huge inventory and also do this type of work in their shops daily. Specialized head gaskets are a hard item to find but they are around. I found a complete Chevy 216 Full Oil Pressure Conversion kit from the last vendor I mentioned and it is a first class product.
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Old 04-12-2011, 08:33 PM
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Well here were I race it is so competitive with these six cylinders (because you cant do a lot to the engines) It is SO COMPETITIVE that any little bit helps. I dont want to be spending 125$ for a head gasket. But I know GM Did make a steel shim thin head gasket for chevy L6's But they are quite hard to come by..... Well I don't know I might just go with a .041 Fel-Pro... Probably a less chance to blow a head gasket anyways..
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