I think the B-series are more prone to breaking sleeves because everyone is all rev-happy with them. The all motor boys experience some failures due to twisting engines 9K+. With a D-series the ports choke and the most you typically see is 8K, with a little less rotational loading due to the lighter piston/rods.

Might not have anything to do with reality, just thinking aloud.

 

Also the ratio of 300 whp+ b series to d series has to be 100 to 1

 

what casues this piston to be that grey/white color? detonation? i would assume so breaking a sleeve with only 18psi

 

its hard to tell from the thread if this is a d series or not but its from d-series.org...



http://www.d-series.org/forums/showt...racked+sleeves

 

im going to say the coolant coming into the cylinder after the sleeve breaking, then being burnt in the combustion cycle....

 

argh. Why didn't I think of that? I have seen plugs like that plenty of times with blown headgaskets

 

SOHC FTW

 

not sure about that.... but this project is getting a green light, just acquired a D16Z6 swap

 

+1