243 ls2-ls6 head differences-how to tell?
#1
243 ls2-ls6 head differences-how to tell?
Ok i bought a new never run set of 243 casting heads off e-bay is there a easy way to tell if they are LS2 or LS6? from what i understand the LS6 had longer hollow stem intake and sodium filled exhaust for less weight - is there any way to tell which valves are in them ? is teardown required? of course im hoping what i have is the LS6 variety but if not ill get over that too , does anybody offer CNC porting on our own castings? or would a sanding roll cleanup of any rough edges be sufficient? just would like a strong running street motor.
#3
Launching!
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I agree that 243 heads are just 243 heads. That is the casting number which is a ls6 head but it is possible that on different models may have used different valves, I don't know. 243 are great heads and there are compainies that do cnc them.
#4
243 heads
the 243 casting is also stock on ls2 but w/o the lighter valves - id just like to tell the difference in them - if there is a way some have the yellow springs and some dont , the heads i bought have the yellow LS6 springs but does that mean they have the lightweight valves ? who knows?
#6
TECH Senior Member
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Ok i bought a new never run set of 243 casting heads off e-bay is there a easy way to tell if they are LS2 or LS6? from what i understand the LS6 had longer hollow stem intake and sodium filled exhaust for less weight - is there any way to tell which valves are in them ? is teardown required? of course im hoping what i have is the LS6 variety but if not ill get over that too , does anybody offer CNC porting on our own castings? or would a sanding roll cleanup of any rough edges be sufficient? just would like a strong running street motor.
Send'em to TEA for porting if you can. They get as much or more out of them than just about anybody. I have seen TEA/LS6's, LS6IM, bolt ons and 22x/22x cammed car in the mid 11's
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#9
243 heads
i dont plan on replacing valves -especially if they are the lightweight LS6 - i just want to know how to tell- what are the differences? id consider doing some port work but im not building a race motor just want good street h/p -best bang for the buck