THE SpecB wrote:peadya100 wrote:Congrats on the result!!
What's the blip at the peak of your dyno graph from?
Ryan (blacktop) has 250wkw on stock internals and has had for over a year. No dramas at all. I'm definitely no expert, but if the extra power is being made by a big turbo, on the same boost pressure that others run on small turbos, is that actually putting anymore stress on the internals? Or is it more than boost pressure that stresses the engine?
I think Alexi said he has head work can etc ? Could be wrong.
What boost are you running Adam in S and S#?
Huh? My engine isn't stock, but has stock heads and cams.
And it's not the boost you're making that kills engines, it's the torque (aka cylinder pressure). 20psi boost from a small turbo isn't anywhere near the torque a large turbo makes with 20psi. Other factors come into play too like revs, oiling, coolant setup, knock control.
Generally on the stock unopened block - heads are easy to lift because the stock head bolts are not very good and the stock pistons are easy to break, because they're quite fragile/brittle. When you're pushing your engine so close to the limit - any accidental event like a knock event or boost spike can easily distort the head gasket and that small leak will get bigger over time...and a few months later you'll start to hear water running behind the dash etc.
Stock engines were not engineered for a super car, and you pay to play...