I have updated my cylinder head flow spreadsheet with some new information. I have broken it down by LS1, LS6, 5.3, and 6.0L

If you have flow information for a set of cylinder heads that you'd like to see added, please forward it on. The more information on the heads, flowbench, etc... The better. If there are any features you'd like to see added, please chime in.

http://users3.ev1.net/~black_ops/hea...2009-09-03.htm

 

great info man :thumbup:, this should get a sticky.

 

great info! time to play with desktop dyno

 

TTT for new forum

 

Badass, thanks.

 

Does anyone have a flow chart for the the ls7 heads?

 

Here you go.

http://www.gearchatter.com/viewtopic11202.php

 

Hard to tell, was that with or without the CNC work? The way he said it it looked to be without....I can't wait to get my hands on a set of these, my 6.0L's flow nearly the same at .625"!

-Bryan

 

My run of the mill c5-r heads with a 4.155" bore and no pipe.

Intake:
.100 67
.200 150
.300 222
.400 295
.500 341
.600 368
.700 367

Exhaust:
.100 43
.200 111
.300 168
.400 207
.500 222
.600 227
.700 231

 

Daaaaamn...... that is nice

Keith

 

The midlift numbers are good but the .600-.700 could be better. Should work well for what I'm doing, although i don't know what kind of port size they are nor what kind of velocity they cary. Just gonna slap em on and find out though. My 434 shouldn't be as sensitive to a lazy port as a smaller motor.

 

"These numbers represent the last version we had the opportunity to flow before the final changes were made to the casting to accommodate the CNC machine work for production runs"

It sounds like they were flowed with no final CNC work, but at least had some port work done to them to reach the projected goal.

 

JRod, i have flow numbers from my latest work, the port is developed with manifold intact. Instead of seeking max flow with clay radius, i have increased flow with manifold to 280+cfm@.600". This latest work has proven to be superior to chasing big numbers method. If you think this is worth adding to your chart i will send it to you.
Jeff (formerly LS1derfull)

 

Thanks. Very useful and bookmarked!

 

Anyone know where this information is available now?

 

Bump. X2
Anyone have any updates?

 

This is all I have for the GM Head Casting Info.
http://www.performancetrucks.net/for...d.php?t=434396