LawmanSS

iTrader: (19)

I have MTI Stage II LS6 heads that were milled .030. What would the true compression ratio be using stock head gaskets and stock short block? FYI, the MTIs have dished exhaust valves. I have heard 10.8, 11.0, and 11.1.

Thanks!

Tin Indian

Somewhere around 10.9 to 1

To be sure, you need to know what CCs the head chambers are now, then look here >

https://ls1tech.com/threads/showflat...=2&fpart=1

LawmanSS

iTrader: (19)

Thanks...MTI is supposed to be mailing me the flow sheets for my heads...hopefully they'll have the true CC's on them.