Block yield, redblock B234 turbo
Postat: sön apr 23, 2017 2:53 pm
Hi.
Thought i would share a few observations.
Im streetracing a 245 with B234 turbo. It is building 563bhp, 723Nm on pumpgas, Vpower.
It has started giving me a few headgasket failures, despite being oringed. It is running a garrett 60mm turbo off a bus on long headers.
I know from datalogs that there has been sporadic knock now and then, and agree this will kill everything.
I did a leakdown test, and it was leaking badly past the rings, so assumed rings was dead, but they look to be very ok. Instead the cylinderwalls has a black mark from soot next to all bolts, and especially obvious there is a balck soot mark correlating to all cooling passages in the blok, in particular where the headgasket finally blew.
The pattern looks like the cylinder is ballooning close to the top deck where the deck is having the coolant passages. Like the block has deformed plastically there. Is there any experience with this?
Thought i would share a few observations.
Im streetracing a 245 with B234 turbo. It is building 563bhp, 723Nm on pumpgas, Vpower.
It has started giving me a few headgasket failures, despite being oringed. It is running a garrett 60mm turbo off a bus on long headers.
I know from datalogs that there has been sporadic knock now and then, and agree this will kill everything.
I did a leakdown test, and it was leaking badly past the rings, so assumed rings was dead, but they look to be very ok. Instead the cylinderwalls has a black mark from soot next to all bolts, and especially obvious there is a balck soot mark correlating to all cooling passages in the blok, in particular where the headgasket finally blew.
The pattern looks like the cylinder is ballooning close to the top deck where the deck is having the coolant passages. Like the block has deformed plastically there. Is there any experience with this?