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Generation III Internal Engine 1997-2006 LS1 | LS6
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Looking for some head port specs.

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Old Nov 8, 2007 | 10:36 PM
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Default Looking for some head port specs.
Pretty simple question for you guys

What is the port length, height, and width of a stock ls1 head?

Does anyone have a picture of the ports?

I just want to "take a look."

Thanks for any help!
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Old Nov 12, 2007 | 02:50 PM
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A bump...

What size are the valve stems? 8mm?

What are the port dimensions?

Length, Width, Height...

Any good write-ups on the innovations of the ls1 engine?

I found this:

http://www.idavette.net/hib/ls1c.html
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Old Nov 13, 2007 | 04:49 PM
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Can anyone help me?
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Old Nov 13, 2007 | 06:14 PM
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Flow numbers:
http://ourworld.cs.com/jrp98ls1/stockheadflow.jpg

Some popular sizes and info:
https://ls1tech.com/forums/showpost....2&postcount=41
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Old Nov 13, 2007 | 07:32 PM
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This link has a few pics of ported heads and a cutaway of the exhaust port. https://ls1tech.com/forums/generation-iii-internal-engine/308115-diy-head-porting-how-shape-around-valve-guides-swirl-ramp-blend-seats.html
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Old Nov 13, 2007 | 10:18 PM
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Originally Posted by 5.3LJimmy
This link has a few pics of ported heads and a cutaway of the exhaust port. https://ls1tech.com/forums/showthread.php?t=308115
Damn, awesome link! I'm saving that one!
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Old Nov 13, 2007 | 11:00 PM
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Originally Posted by 5.0stang
Pretty simple question for you guys

What is the port length, height, and width of a stock ls1 head?

Does anyone have a picture of the ports?

I just want to "take a look."

Thanks for any help!
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Old Nov 14, 2007 | 09:14 AM
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I just measured a 241 casting.
Intake width(at port entrance)- 1.020
Intake height(at port entrance/rough measurement)- 2.630
Intake Depth(from edge of entrance to back of bowl area)- 5.0
Exhaust width(at port entrance)- 1.535
Exhaust height(at port entrance)- 1.305
Exhaust Depth(from edge of entrance to back of bowl area)- 2.75
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Old Nov 14, 2007 | 04:15 PM
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Great start guys!

Does anyone know the average cross section of the ls1 heads?
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Old Nov 15, 2007 | 12:39 PM
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A bump for anyone that has some cross sectional data?
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Old Nov 15, 2007 | 12:49 PM
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you can call richard at west coast racing heads. He is a sponsor here and a really cool guy. I am sure he can answer all your questions.
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Old Nov 15, 2007 | 01:28 PM
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Originally Posted by 1320 killer
you can call richard at west coast racing heads. He is a sponsor here and a really cool guy. I am sure he can answer all your questions.
+1 I've seen him post up all sorts of dimensional specs when the L92 heads came out. I'm sure he knows the rest of them too.
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Old Nov 15, 2007 | 09:40 PM
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Thanks again...

What is his screenname? I could do a search and get all kinds of different info...
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Old Nov 16, 2007 | 08:47 PM
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Originally Posted by 5.0stang
Thanks again...

What is his screenname? I could do a search and get all kinds of different info...
Ding, what do I win?
https://ls1tech.com/forums/member.php?u=5034
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Old Nov 16, 2007 | 10:25 PM
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Originally Posted by Beaflag VonRathburg
My online respect

I sent him a PM!
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