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Originally Posted by cjperformance
Good info, so 35% prob excessive. Mike's vid recommended starting at 30%. Honestly im much more concerned with how im going to f up when i pulley down. Not so much on dialing in my current pulley.
Did you have to manually smooth, or is that done by the spreadsheet?
Also what are your DI IPW? Mine are around 5.8ms. Mike's vid recommended targeting 5.0 to 5.5 while on PI.
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I would dial in the pulley you have and rectify any issues with that tune. Then you'll probably only have to make slight changes for the smaller pulley. I think you'll be surprised how much more hp you can make just with the same pulley. I went from 677 rwhp to 707 with just a 3mm pulley change from 98mm to 95 and really not much of a change in the tune. I'm going to be running the 98mm pulley for the 10.00 class at WWtraceway in the headsup class but I'm basically running the 95 mm tune for that class. These are not big jump in any of my tunes, just tiny timing and PE changes, don't think we made any Port %s changes between the pulleys.