CaMaRo67RS355

iTrader: (75)

any difference in LS2 #243 heads and LS1 #243 heads?

jetlag

iTrader: (32)

Well it's not really LS1 243, they are LS6.
and I think they have different valves.....

CaMaRo67RS355

iTrader: (75)

i meant ls6 my bad guys typed it too fast.

any gains over the ls6 going with the ls2?

jetlag

iTrader: (32)

I'm not 100% sure, but I think they are pretty much the same except for the valves.


(Althought LS6 intake is better than LS2)

1Topgun

iTrader: (3)

My understanding is that the heads are basically the same...the difference is the type of valves installed. GENUINE GM LS6 heads have lightweight hollow-stem intake and sodium-filled exhaust valves. Replacement cost of the valves alone is about $650 for 16. The benefit of those valves is the ability to rev to 6600+ rpm, with the 90# LS6 springs without valve float. Those springs rob less HP than ~130# springs needed with standard weight valves to run at that rpm or higher.
Mike

99T/AMAN

iTrader: (1)

so does this mean that the ls2 heads are the same as the ls6 heads but with different valves?

1Topgun

iTrader: (3)

Yes, that's right...same head casting #, same combustion chamber cc, same intake and exhaust ports, same valve sizes (2.00 & 1.55)...just different valves. LS2 valves have the solid stems.
Mike