[Shotimes] New +20 cam dyno results
Donald Mallinson
dmall@mwonline.net
Sun, 29 May 2005 15:30:38 -0500
Mike,
My pure stock '91 ran an almost perfect A/F ratio all the way to almost
6000 rpm. IT was uncanny, nearly table flat. Maybe it was a fluke.
Too bad I didn't get an A/F meter set-up on my dyno way back when.
Like I said, I still have some tuning to do, and there is an annoying
tick in the engine, that you thought might be a bad plug wire, maybe I
should do a hot water spray test to see if that is so. If there is a
bad wire, then that would account for a lot, but it sounds more
mechanical.
Don Mallinson
Mike Kopstain wrote:
>Stock, The SHO PCMs are programmed to run pig rich in the upper RPMs. I
>presume this was due to the engine's relatively high compression (for the
>time) and was used as a safety measure. We've seen anywhere from 10:1 -
>11.5:1 in the upper rpms. Joshua Teixeira has also confirmed this.
>
>Mike Kopstain