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what does a stock ls1 head flow?

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Old Jan 9, 2006 | 01:18 PM
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Default what does a stock ls1 head flow?

I have been researching the flow charts of many aftermarket heads and i was wondering how the stock heads flow?

Thank you
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Old Jan 10, 2006 | 03:56 PM
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I would like to know this also.. Anyone know.

Bill
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Old Jan 10, 2006 | 04:18 PM
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We flowed a 241 head on our bench the other day with a stock valve, stock valve job, using a clay radius on a 3.905 bore and it flowed 231 / 179 @.600".
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Old Jan 10, 2006 | 04:26 PM
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Could ya post the flow #s at all lifts too, Gunnar?
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Old Jan 10, 2006 | 04:31 PM
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Only because you asked Bo. LOL

.100 61 / 51
.200 120 / 97
.300 174 / 130
.400 212 / 153
.500 220 / 168
.550 225 / 174
.600 231 / 179
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Old Jan 10, 2006 | 04:50 PM
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Thanx man
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Old Jan 11, 2006 | 09:47 AM
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This is from Chevy High Performance's online cylinder head flow database.

Production LS1 Aluminum Head





GM won’t be left out of category 3 with these heads. This head has great 0.400-inch lift numbers as well as a good E/I ratio. They also feature a more flat valve angle (15 degrees) in order to promote a better combustion chamber that’s shaped like a kidney to help direct combustion and reduce possible detonation. Remember that this head will not interchange with pre-‘93 small-block heads.

Jason
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Old Jan 11, 2006 | 11:48 AM
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I have seeen these #s and it doesnt say but I believe this is on a 4.030 fixture.
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Here's what I've found
Attached Thumbnails what does a stock ls1 head flow?-stockls1-flow.jpg   what does a stock ls1 head flow?-stockls6-flow.jpg  
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