I’ve got a 92 sn with a 701, 61x cylinder and 62t bottom. Factory pipe, msd ignition and a ada head. I don’t yet know the dome size but the po always ran it on pump gas. It was having starting problems ( in the water) but ran great on the trailer. I decided to start digging and immediately found damage. It’s amazing it ran at all. I was hoping to get some insight on what would cause piston damage exactly the same on both pistons. Appreciate the help.
Piston damage
- Thread starter Mike92sn
- Start date
- Location
- mobile alabama
Piston ring snagged exhaust port on down stroke ripping top of piston off
- Location
- Reno,NV
what dome size ? what was target compression ?
I would assume raised compression, due to additional components and ADA head ?
from what i can see both pistons burnt on exhaust port .....too hot .....and looks like piston wash indicates >>
jetting to lean ? or too low octane gas for the compression ? or both .....
,,,,,,
I would assume raised compression, due to additional components and ADA head ?
from what i can see both pistons burnt on exhaust port .....too hot .....and looks like piston wash indicates >>
jetting to lean ? or too low octane gas for the compression ? or both .....
,,,,,,
- Location
- Glenmoore pa
Can’t really tell in the pics but is there any chamfer on your exhaust ports? Maybe it was poorly ported and someone didn’t add back the chamfer.