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Message: [QUOTE="superpsd, post: 1490635, member: 15821"] I first tweaked a PHP canned tuned for my 200%s. I found the SOI mapping to be way too advanced for a larger nozzle. A larger nozzle will itself advance timing. I actually started from a stock calibration. I dug thru table after table and made adjustmenta as I went along. The interesting part with this HEUI stuff is given the tables to adjust there are many different ways to tune. The tune I run I have not made any adjustments to the multiplier map. I simply rescaled the PW map along with ICP, MFD, SOI and a few other small tweaks and parameter changes. I have played with the low boost fueling maps a little but never saw much change so I left them as a stock calibration has them scaled. I will have to look latter but I do believe the PW multiplier map that I run is multiplied by 1 once to temp. I have no cold running issues so in my case I just leave it as is. You can always just load your tune with a stock calibration and use the F9 key to see the overlay and readjust the multiplier map to a stock calibration. [/QUOTE]

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