BASB on a 6.0L

04cr450 · Oct 17, 2015

This I hate hearing.. esp after all the work you did awhile back

swinky · Oct 17, 2015

borsky said:
Well it has the exact same symptoms as last time I cracked one. Bad miss on cylinder #4 and excessive blowby, enough to blow the dipstick out of the tube.

That's just crazy. These things never crack pistons.

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KCTurbos · Oct 17, 2015

Did you machine the pistons when did the .30 over? If not then you would have raised your compression a bunch and theoretically more prone to pre ignition which could to crack pistons.

Our motors already have such high comp ratio from the factory... raising it is not a good idea.

Either way I am hoping for the best for you... maybe you will get luck and it will be something small

Merc82 · Oct 17, 2015

Yikes, I hope it all works out man.

05sixliter · Oct 19, 2015

KCTurbos said:
Did you machine the pistons when did the .30 over? If not then you would have raised your compression a bunch and theoretically more prone to pre ignition which could to crack pistons.

Our motors already have such high comp ratio from the factory... raising it is not a good idea.

Either way I am hoping for the best for you... maybe you will get luck and it will be something small

Boring .030 over only increases the compression ratio by .10, I don't think one tenth would be considered enough compression increase to have pre ignition issues.