whats the main change from 9r07 to 9r08 on a U7193

[Hotrod2004]

I have a 04 sierra z71 with headers, exhaust, intake and msd ignition. Just wanted to know if I'll notice a difference in overall power and mileage. thanks love your products

[06MonteSS]

yes, you would notice a nice improvement in performance... about 15-20 hp and tq....

plus more if you got a custom tune made for your truck...

[Hotrod2004]

thanks for the info. diablo is the best

[Hotrod2004]

how much does the custom tune cost? also Ive done the logging before and had to richen my injector slope by 10% from the intake and headers. should i still do the logging with the new software update, and would I see more pwer if i sent you the data. Id like to know what i would need to log so that you could tune it. thanks again

[06MonteSS]

you can find all the info you need, here:

http://eprowebdesigns.com/DiabLew_Tune/

has links to the info on how to do a proper data log, what parameters to log, how to copy your tune files, etc etc etc...