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Generation III Internal Engine 1997-2006 LS1 | LS6
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98 LS1 heads?

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Old 01-04-2008, 10:21 PM
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KOS
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Default 98 LS1 heads?
how much intake runner volume (cc's)and combution chamber are they?also what max hp potential have you guys seen(with full porting)?thx Nick
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Old 01-04-2008, 10:24 PM
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Originally Posted by KOS
how much intake runner volume (cc's)and combution chamber are they?also what max hp potential have you guys seen?thx Nick
They flow right around 255-260 CFM. Max port on that head will flow around 308 CFM. very big difference gain around 40 to 45 rwhp. Unlike the aftermarket head's the floor pattern is not the same. These estimates are as close as your going to get on a stock maxed ported head.
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Old 01-04-2008, 10:34 PM
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ok how big is the intake runner?and combustion chamber?
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Old 01-04-2008, 10:40 PM
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Originally Posted by KOS
ok how big is the intake runner?and combustion chamber?
not sure give me a second
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Old 01-04-2008, 10:59 PM
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Originally Posted by KOS
how much intake runner volume (cc's)and combution chamber are they?also what max hp potential have you guys seen(with full porting)?thx Nick
stock i believe combustion chamber is 38cc and the intake runner is 200cc
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Old 01-04-2008, 11:04 PM
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maybe the intake runner but i thought the chambers where in the 60s somewhere?
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Old 01-04-2008, 11:07 PM
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Originally Posted by KOS
maybe the intake runner but i thought the chambers where in the 60s somewhere?
your right it is 67 sorry for the type O
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Old 01-04-2008, 11:10 PM
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Originally Posted by KOS
maybe the intake runner but i thought the chambers where in the 60s somewhere?
Positive 67


ALUMINUM

Intake Runner Volume (cc) -200cc

Casting number - 12480109 LS1

Combustion Chamber Volume (cc) -67

1.550" Angled
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