Comp. is 115 on all cyls. Hauck race porting, Boswell sold me the compleate rack, bored out to 35 or 36mm, I'm not sure what else he did. he called it a "stelth mod" Sorry no dyno sheet. I only used this for lake racing & speed runs so not much for miles on the motor as an 880. 2400 miles prior conversion. The crank is also welded.