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you must have a rare duramax that will tow past a repair shop
the ones i see can not do 60 & get 6 to 8 mpg
I have looked at EFI Live for my D-max. On the dmax you can change on the fly between tunes on the 2004.5 and later. I need to get it for mine. Mods are catching up with me. I believe the EFI live software. The people are doing the tuning with the software. EFI Live is not selling tunes. But software. Letting them off the hook. Now the guys tuning it for you, who knows where they will be standing in the future. I know it is seems to be the best deal for making power and handling mods on the GM. EFI Live just started working on Dodge in the last year or two if I am not mistaken. I have been looking real hard at water/meth injection. I really want to lower my egts while towing. They peaked at almost 1300 deg the other day. The truck downshifts and spins the motor up and the egts came down? Stopping at the local shop on Monday to see about EFI and if my are messing with me on the egt deal.
i have looked into the washer fluid inj too but my only concern is long term effects to the motor. i think if i needed that much extra power i will prob just step up on inj's and turbo over stock for another 100 hp bump but don't really need it now. i did read the snow site sat night while dune and carl and I were eating ramono's pizza at my place and they throw some impressive #'s around but less info on the 7.3 than the duramax and dodge and 6.0 psd's. they claim 50 to 100 hp increase on the 7.3 and don't state why though so i have to wonder if they dyno'd a truck to check and if so 50 to 100 hp is big spread but who knows. fast what was you mpg saving from the inj kit?