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Flow rate on "stock" size ports...

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Old Mar 31, 2008 | 04:48 PM
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Default Flow rate on "stock" size ports...
I'd like to get info on the flow numbers for the stock unported LS1 heads, like the "806" - "241" - "243" castings. I'm interested in what the stock ports flow on these castings to see how much better aftermarket heads will actually be. Can anybody help?
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Old Mar 31, 2008 | 06:08 PM
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I think Livernois website shows the comparison. It is by a pretty good margin but the intake runners are bigger than stock so that accounts for some of it.
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Old Mar 31, 2008 | 06:17 PM
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Attached Thumbnails Flow rate on "stock" size ports...-stockls1.jpg   Flow rate on "stock" size ports...-stockls6.jpg  
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Old Apr 1, 2008 | 09:41 AM
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Here are the flow numbers for a stock 243 casting compared to our CNC stage 2 243 casting with a 220cc intake runner.



Originally Posted by SOMbitch
I think Livernois website shows the comparison. It is by a pretty good margin but the intake runners are bigger than stock so that accounts for some of it.
Thanks SOMbitch!

Regards,

Rick LeBlanc
Livernois Motorsports
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Old Aug 18, 2008 | 02:38 PM
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Originally Posted by LivernoisMotorsports
Here are the flow numbers for a stock 243 casting compared to our CNC stage 2 243 casting with a 220cc intake runner.





Thanks SOMbitch!

Regards,

Rick LeBlanc
Livernois Motorsports
What LS heads are those that you are comparing??? LS6? or LS1?
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Old Aug 18, 2008 | 04:38 PM
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Id say those are Ls6's after looking at the attachments in post 3..
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Old Aug 19, 2008 | 06:22 AM
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Also bear in mind since the motor cannot run w/o an intake, the intake is going to be the main determination. I dont think there is a intake out there that flows over 300 thats factory based, i.e. LS1, LS6, FAST (even ported), Typhoon.
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Old Aug 19, 2008 | 09:27 AM
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Have you ever seen or found a flow sheet for intakes??? Cause that would be cool..
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Old Aug 19, 2008 | 10:13 AM
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Originally Posted by 99Ls1fever
Have you ever seen or found a flow sheet for intakes??? Cause that would be cool..
LS1Tech, Gen III External engine stickies, scroll down to letter F. LS1 tech stickies contain a lot of information.
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Old Aug 20, 2008 | 03:45 PM
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Also does anyone know what the stock flow numbers are for LQ9 heads and if you have them ported and polished also... so stock flow and ported flow numbers I have been searching every where it seems like to find a dam flow sheet for these things...
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