| Re: Engine gone bang !
Wilf,
You're right - the main question is why did the piston break?
Certainly not over revving, but it could be over heating as it has been getting hot recently and l thought a head gasket was on its way out or more likely to do with the nitrous kit l have. Although it is only a 75 hp jet, and l do have a progressive controller to feed the nitrous in, it seems likely that has weakened the pistons. Forged pistons are the only way to go with nitrous it appears?
Apparently I cannot overbore the block anymore so now I'm thinking if it's going to have to be lined at the cost of £800 to £1k then l might as well buy a new 350 block, use my 400 crank and make a 383ci from the parts left over.
The engine itself was rebuilt 5 1/2 years ago and has done around 10k miles.
It was on a rolling road recently where it made 446 bhp and 587 lbft so it "sees some action". The fuelling was spot on and there is no hint of detonation although it has always used oil. |