no compression in cylinder, poor results across board

[Jasper16g]

Hey all,

On my second pass at the track, the car totally broke up about 50' from the finish. Was hoping that it was a fouled plug but apparently not. Here are the findings:

Cylinder 4 (going right to left) - 0 compression, elctrode totally gone on plug, ceramic totally gone as well. Very oily and black.

Cylinder 3 - 120 compression, plug looked ok

Cylinder 2 - 80 compression, ceramic busted and plug looked bad.

Cylinder 1 - 90 compression, plug look ok.

I am guessing a burnt valve in cyl 4 and a possible blown headgasket. Hopefully the bottom end survived the carnage... Going to pull head and inspect/repair. Any other suggestion, thoughts on things to check out or possibly be wrong?

Thanks

SQ

 

[PIMking]

Is this a 1g or 2g?

and what did you run? just want to know.

I did the same thing and the piston was melted down.

 

[Jasper16g]

Is this a 1g or 2g?

and what did you run? just want to know.

I did the same thing and the piston was melted down.

2g
small 16g
FMIC
TBE
MAFT w/ gm 3"
550 inj
A/T

15.4 @ 91 on first pass (terrible 60')
15.1 @ 78 with the "breaking at end"

SQ

 

[PIMking]

Yeah your not going to find out whats wrong until you get that head off. Hope its rebuildable.

 

[Jasper16g]

Got the head off tonight, burnt valve as I suspected. Bottom end looks to be ok. Now the question is should I rebuild the 2g head, or put a 1g head/intake mani on it? I don't really want to go all out or anything, but just get it back on the road and maybe some performance if possible.

Thoughts?

SQ