Well, I think I broke it...

[Lusk Racing]

Apparently oil starvation/bearing failure at the 1200' mark at 6800 RPM does damage to a LOT of stuff.

Up to this point i have found that pretty much the entire bottom end is junk. I got one head off and found that all 8 valves in that head had touched a piston hard enough to at least mark each valve relief. #4 rod is the one that disintegrated, #1 exhaust valve is bent at about a 30 degree angle. I feel pretty fortunate now that more stuff didn't get damaged. Pretty sure all 8 of the valves in that head are bent, but not a one of the pushrods are bent. Smith Brothers 3/8 .120 sidewall ftw there.

Anyways, here are some pics of the carnage. Looks like I am starting over this winter. Oh well, it was time for an Iron Eagle block, F2 and shorter stroke setup anyhow.

[Lusk Racing]

[silverhatch]

Damn you can't seem to catch a break with that car. Oh well when it does finally come together and work it will be a hell of a ride.

[ELVIS]

ouch man.

god bless.

[Sean88gt]

Dammit man! Didn't you just recently rebuild?

[Lusk Racing]

I put a new top end and the D1 on it last winter. Guess I should have checked those bearings too!! LOL. Thing that really sucks is it was the last pass I was going to make this year. The previous two passes that day were a 9.82@138 and 9.86@137 both beat my previous personal best. The pass when it let go was still a 10.13@12something. Power brakes don't work worth a shit when the motor scatters itself, lol. I have a pretty good time shutting that 3700 pound pig down after that.

[UserX]

Yikes!

[talisman]

Shit! lol, well, last pass for the year, at least you've got plenty of down time planned already, so now you can rebuild.

[mstng86]

Good googlie mooglie

[line-em-up]

That was an expensive suck. Why do you think it was a bearing?

[mustang_revival]

fuuuuuu

[chevyboy523]

I think it needs a doctor

[Lusk Racing]

That was an expensive suck. Why do you think it was a bearing?

The crank journal of the failed rod is black. Classic oil starvation signs, and it is the last rod journal in the oiling sequence. I haven't got the block out of the car to be able to remove the crank to see for sure what happened, but I am guessing either the thrust bearing failed, or there was heavy wear/damage on one of the bearings in front of the failed journal causing lower oil pressure further back in the oiling system. Just a guess on my part as to what caused the oil starvation on the back rod journal, but oil starvation is what cause the rod to fail, IMO.

[Moose Jr.]

I put a new top end and the D1 on it last winter. Guess I should have checked those bearings too!! LOL. Thing that really sucks is it was the last pass I was going to make this year. The previous two passes that day were a 9.82@138 and 9.86@137 both beat my previous personal best. The pass when it let go was still a 10.13@12something. Power brakes don't work worth a shit when the motor scatters itself, lol. I have a pretty good time shutting that 3700 pound pig down after that.

They always break when it seems like they are on their best pass.

[GT Fanatic]

get some quick steel. that will fix it