Hello, I have been building predators for a good amount of time. But just recently I’ve gotten into high compression applications.
My setup includes:
Rattlesnake cam: 230D and 251L
26lb Valve springs
14cc high compression head w/ porting
Stainless steel valves
Chromally push rods
flattop piston
Stock length billet rod
Billet flywheel
Billete side cover
Mikuni 22mm
Pulse pump
The top of my piston blew into pieces, and I would like to figure out why. I’m not sure if I have clearance issues or what. something to consider, the side cover on the engine blew off prior to the piston breaking. I wasn’t aware that the side cover came off my block and drove it for 1/2 mile, then the engine started getting very loud(I shut it off). I then looked on the inside of the short block and everything seemed to be fine. So I got a billet side cover and called it a day. After that I Decided to make the engine a hi-compression engine. Once I switched to the 14cc I felt a drop in power, only able to go 31 compared to 55. I did another top speed run and my piston broke. The cylinder walls didn’t even seem to be bad, even after the pistons broke(somehow). When I drained the oil it was black(seemed to be blow by).
also: I’m not sure this is a big deal, but also grinded off the top of my valve stem to make my rocker stay on the valve. Hopefully that didn’t make a difference but wanted to throw that in there.
I’m just confused and I probably did something really dumb lol. I don’t know how high compression stuff works I just tried it out of nowhere.Thanks for your time.
My setup includes:
Rattlesnake cam: 230D and 251L
26lb Valve springs
14cc high compression head w/ porting
Stainless steel valves
Chromally push rods
flattop piston
Stock length billet rod
Billet flywheel
Billete side cover
Mikuni 22mm
Pulse pump
The top of my piston blew into pieces, and I would like to figure out why. I’m not sure if I have clearance issues or what. something to consider, the side cover on the engine blew off prior to the piston breaking. I wasn’t aware that the side cover came off my block and drove it for 1/2 mile, then the engine started getting very loud(I shut it off). I then looked on the inside of the short block and everything seemed to be fine. So I got a billet side cover and called it a day. After that I Decided to make the engine a hi-compression engine. Once I switched to the 14cc I felt a drop in power, only able to go 31 compared to 55. I did another top speed run and my piston broke. The cylinder walls didn’t even seem to be bad, even after the pistons broke(somehow). When I drained the oil it was black(seemed to be blow by).
also: I’m not sure this is a big deal, but also grinded off the top of my valve stem to make my rocker stay on the valve. Hopefully that didn’t make a difference but wanted to throw that in there.
I’m just confused and I probably did something really dumb lol. I don’t know how high compression stuff works I just tried it out of nowhere.Thanks for your time.