Thats a nice project your buddy has. Last I remember your project had issues with the pistons..roller waves I think you canned one of them?? Hows it now?
Yeah summer of 2007 I had bored the car out to 85mm. I was running a 89mm crank which put me a tad over 2 liters. I had replaced the failed supertech valve train with all manley components and yeah, the pistons were Endyn Rollerwaves.
I had the car tuned and within 500miles, on the way to Watkins Glen for a charity run the engine ran lean under 5th gear acceleration and I had a bad meltdown. The engine stayed together and I was able to limp it to a gas station where I elected to have it flat bedded home. Even when I got it home she started up, but I could tell it was bad, I ran a compression test and that told the story.
I have no idea why it was lean, there's many theories and I'm not going to get into that aspect of it because it's touchy with the tuner. All I know is the guy is the best in the industry and he is still my tuner and he tuned a few other of my friends cars as well.
This is what we do though right?? You have to sometimes expect it. My biggest fault that I will not do again is invest so much money and not have the proper instrumentation. If I had a air/fuel gauge this wouldn't have happened.
Anyway, I had the block re-bored to 85.5. I bought new rollerwaves. The head was cleaned up and checked for warpage, the rods were checked as well. I have all new gaskets and I'm finally putting the engine back together now. Following Larry from Endyn's suggestion I did decide to lower the compression this time around. Instead of running the ITR 11.1:1 I dropped it to 10.5:1. This will give me more of a safety window in tuning and I'll be able to run a little more timing anyway.
Since then I had another child, my job got real busy, and I built a house. So with all that going on the CRX had to take a back seat.
I have some picture of the damage here, if anyone wants to see $900- pistons melted.
Got Lean?
Teaser picture......