twisted turbo m1000 low compression

[Lotza boost]

100 lbs compression....Pistons and cylnders look to be in good shape and the head rings look good also... no scoring....engine has 800 1000kms... ring end gaps between 17 20 thou... anyone els ever have this problem ??

 

[Lotza boost]

Crankcase leak ? Reeds are good.. new top end and doing a leak down test tomrow
.

 

[moyiesledhead]

Has it maybe been decompressed for boost? Some guys will double up their base gaskets to take the compression down a bit.

 

[Lotza boost]

Bottom of cylnders have been decked 24 thou and squish band and pocket have been changed to... but should still have 145 150 psi...