frepea wrote:
Apparently,NA motors make there best power around 12.7-13.1,and made it best dyno power @ round 12.8, my engine was not happy anywhere near stoich,10.6 compression probably had something to do with that.Wasnt even spinning that high either,didnt even get to 5000rpm,the last log on the tune I have loaded(done not an hour earlier)shows I am close to the target from about 3500rpm and up,with a dip to 12.00 between 3000-3500,and timing was never above 28degrees,and got there progressively, so I am kinda not leaning towards detonation. As an aside....I am hearing some good and bad,in regards to Hyperteutectic pistons(what I had) they are hit and miss with quality??. Some say they will not use them,as they can be fragile,although this was an Eagle rotating assembly made in the US,you have to wonder where they get some of there components from.And no,I didnt run Nitrous/hairdryers on it either,so I guess this was an expensive mistake. Alex.
Eagle rods are made in China...or at least that's what I thought. Good quality from what I understand. When I first saw it I thought nitrous, the crowns of the pistons do look like they were experiencing some detonation. I'm interested the ones that didn't grenade. It doesn't sound like you were flogging it that badly - sheesh why do these things happen to good people?