Blew a headgasket at the 1000ft mark.

Theory is too much heat and back pressure between the cylinder and the and turbo. On the trans brake too long built up too much heat. The 68mm turbine wheels and .81 AR housing probably helped contribute to the issue. The tune is spot one. 17degrees of timing , AFR 11.5ish, IATs under 150. Only thing abnormal was engine coolant temp around 196.

I am running e85 from the pump.

Plan is to weld it, mill em, and put it back together.

Anyone have any input as to why i shouldn't fix the head?

 

tune was not spot on if that happened sorry to say

what was the 1/8 mile times

 

What cylinder?

 

17* is alot for 28psi even on e85

 

Kind of agree with screaming there. Maybe it was just a **** head gasket maybe it detonated and lifted a head. Every time i seen a head look like that it usually was because we got greedy with timing and detonated
but no i honestly seen wayy worse heads welded up and re decked with no issues. Only thing you hurt there was the resale value there! Haha

 

If you got hp tuners i can send the log, config file, and the tune for anyone interested in looking at that stuff.

 

whats the pistons look like? id probably pull them and see if you hurt them, when you torch a head like that other damage was done

 

Could be numerous things that caused that, I'd be interested in looking at your tune and log file. Not that I could tell what happened but just like looking at other peoples stuff. I just torched a piston because I had a injectors fail, but my log still didn't show anything wrong. What kind of intercooler setup are you running? Send it to goosegraphics@mchsi.com

 

timing timing timing

 

Email Sent

 

ive done the same thing on 26psi and 18deg
torched the cyl head right out.

lowered my timing and never again

 

The problem cylinder looks leaner than the surrounding cylinder. May check that out. Mark the injector that came out of that hole and flow it. Or swap it out with the richest looking cylinder on that side at minimum.



I may have done the same at 25lbs and 17* a few weeks ago. I figured it was poor head clamping on my setup. Kinda looked like it had been eating its way to freedom over many runs, so it may not be related. I was using E85 and water/meth inj. No signs of detonation on the plugs, pistons, or CC. LS9 gaskets, china studs torqued to 75lbs once... never retorqued.

 

zoomed in on pics....what injectors are you running?

what blend of e85?

wonder if injector was partially clogged, if you look at the other cylinder the strap isnt bad looking

 

Clogged injector and High intake temps

 

Anyone have any thought on cometic MLX gaskets vs the standard GM 6 bolt gaskets?

I didn't know you could get a 6bolt factory GM gasket. I already ordered the cometics.

 

Woowww cant you just jb weld that or fill the melty hole with solder somthing?? Bwaha

And to the OP. Just realized what car this was. I been following your build thread. Awesome car and damn shame it pop'd already. Hate to say it but i think its holly dominator time...

 

FIC 2000s , e85 is from the pump. Didn't not check it the percentage on this tank.

 

id have them checked before you put motor back together

 

Yea I plan on it.

 

yoshgixxer , yea i can't believe it went too to be honest.

Be nice to find the route cause of the issue.