large main jet detonation

**Mon Mar 28, 2011 1:13 pm » Post: #1 » Download Post**

Guys

i have 2nd time the lower cylinder seized last week, oil system works fine, i will then asume my large 150 main jet can cause the detonation, due to low oil mixing.

can this be the case can detonate with extremely large main jets?

rgrds

**Mon Mar 28, 2011 3:17 pm » Post: #2 » Download Post**

you need to measure the squish and tell us ,
what fuel are you using ?
Have you skimmed the heads ? What is the volume ?
Have you advanced the timing ?
Show us some pictures .

**Mon Mar 28, 2011 4:48 pm » Post: #3 » Download Post**

No rich mixture (big jets) cant damage your engine..
The point is do you have the right mains for your setup?

**Mon Mar 28, 2011 11:47 pm » Post: #4 » Download Post**

150 main, pft, call that large.