head flow
head flow can anyone tell me stock for stock what are the flow #'s for 241 casting ls1 head and 243 ls6 head, and if the compression would be the same if both were mounted on the same motor?
Originally Posted by ChucksZ06
10 to 1 vs 10.5 to 1. ls6 flow maybe 10 % more than ls1.
Originally Posted by ChucksZ06
10 to 1 vs 10.5 to 1. ls6 flow maybe 10 % more than ls1.
Originally Posted by 1999 SS
can anyone tell me stock for stock what are the flow #'s for 241 casting ls1 head and 243 ls6 head, and if the compression would be the same if both were mounted on the same motor?
Here is a thread that we posted on the other with stock 243 numbers from our bench:
https://ls1tech.com/forums/generation-iii-internal-engine/434815-what-do-cast-ls6-heads-flow.html
And here is a thread with the stock 241 numbers from our bench:
https://ls1tech.com/forums/generation-iii-internal-engine/434099-what-does-stock-ls1-head-flow.html
The 241 castings are 10-1 on a stock LS1 bottom end and the 243 heads aould be 10.5-1. The 241 heads have a 67cc combustion chamber and the 243's have a 64cc which will result in a .5 point gain in compression.
