Quote:
Originally Posted by First c10
Thanks Wasted!
I never thought to just google it.
Did GM make 243 heads with different internals, like Springs, Valves etc.
|
Yes.
The 243s that originally came on LS6 engines ONLY (Z06, CTS-V) have the hollow stem intake valves, and sodium filled exhaust valves to allow higher RPM usage. They also have the "yellow" valve springs for use with the LS6 cam.
The 243s that came on 5.3 engines, and LS2 engines have solid stem valves. The 5.3s have "normal" springs, and I believe the LS2s also have the yellow springs....which would make sense, since the cam specs are the same as the LS6 cam.
The castings are the same.
__________________
1972 2wd K/5 Blazer Turbocharged 370 LSx - 941 rwhp / 1093 rwtq
1969 Chevy K-10 L33 5.3 / 4L80E / NP241 / 4" lift
1964 Buick Skylark Twin TURBO 383 LS pro-touring project
2014 VW Passat TDI - Daily Driver
Turbo diesel
2015 Sierra Denali HD Duramax Turbo diesel
2023 Ford Explorer ST - Twin Turbskis
2023 Ford F150 RCSB - Whipple Supercharged
2017 Polaris RZR Turbo
2014 Nor-Tech Center Console - Twin Supercharged Outboards
TURBO ALL THE THINGS!!