Best Budget Full Exhaust?
#31
I can email you my tune if you want. I use EFI Live 99% of the time but i do have HPTooners. Which ever one you were to get, there are plenty of guys on here that would help you out. Ive had my 2500HD for about 3 years now and just yesterday i got to tinkering with how it cranks so RPMs dont flare up to 2000 and then fall to 600. And i mess with shift points and TCC Lockup a little trying to get it just right.
My Tow/Haul locks TCC at 24mph in 2nd and stays locked thru 4th so it doesnt build heat on the back roads towing heavy and pulls a little better.
My Tow/Haul locks TCC at 24mph in 2nd and stays locked thru 4th so it doesnt build heat on the back roads towing heavy and pulls a little better.
#32
... That is an interesting strategy. I will have to consider ramifications.
I have done near opposite: My tow haul settings all delete TCC lockup, and lockout OverDrive ( upshift to 4th at 255 mph, downshift to 3rd under 237 mph )
#33
Why would you not let the converter lock while towing? That's a good way to build a ton of heat not to mention lose the efficiency gained by locking the clutch up. I can see raising OD to not upshift until higher speeds like 60-65mph but locking it out completely?
#35
Locking the converter and keeping rpms above 2500 in every gear and trans will barely get Over 150* I have my shift points and lockup set so it never sees less than 2500 rpms and part throttle shifts are between 3500-3700 rpms.
its not set to see 4th gear till 75-80mph.
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GM Engine & Exhaust Performance
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Aug 7, 2016 07:32 AM








