Compression Ignition Addict
Join Date: Nov 2008
Location: Kingwood, TX
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the street tune is for light towing, ie 3000lbs or something around those lines. If you're towing 8500lbs i would put it on your tow tune. That's way too heavy for street, your EGT's will be high, your cylinder pressures will be too high and you could run the risk of lifting the heads and blowing your head gaskets since your still on stock bolts.
i personally do not like the street tune. I've got it but took it off my tuner, i only tow with the tow tune now. Tow aggressive is a very good program and she pulls much better imo than the street tune. I also have been getting 15mpg on the tow tune while doing 95-90mph towing around 4-5k lbs.
'01 BMW ///M3 - New Toy
'07 F-250 PowerStroke - 5" MBRP Straight Pipe, Edge Insight, Eric Tuned SCT, HID's, 2.5" Newton Lift w/ 4" rear block and Icon Caster Sleeves, Bilstein 5100's, 18" XD Monster's w/35" Toyo M/T.
'17 Chevy Malibu - DD and Company Vehicle