3.91 gear swap tune adjustment with HP tuners - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

BadAquaBluSS · 11-12-2015, 04:49 PM

Hi guys sorry haven't been on here much, had a series of things going wrong in the family the last of which my dad passed away, now that I have my mom situated and the other accompanying things done , I'm ready to get back on my car I recently purchased and installed an Eaton True Track with 3.91 gears in my car, i've made a couple of test hits car feels really good, but I noticed my speedo is off by about 5 mph, anyone know the settings for going from the 3.45 to 3.91 in HP Tuners? Anyone know the settings for going from the 3.45 to 3.91 in HP tuners? If anyone can let me have a stock 1LE tune to look at, it would be greatly appreciated thanks guys.

etmx183 · 11-13-2015, 06:45 AM

Which version of HP Tuners Editor are you using?
Hope this helps you out
For you Do It Yourself folks with HP Tuners, all you have to do is pull up the Speedo tab, Click Speedometer and you'll see two windows for current and new.

Enter your new tire size (if it changed or old size if it didnt) and your new gear ratio.

Click the auto scale transmission tables YES and click commit.
Manual no further adjustments needed and your speedometer will be on target.

For the Automatic guys, same thing and after you click commit, HP Tuners will automatically rescale all your shift points for you for the new tire size and gears.

BadAquaBluSS · 11-13-2015, 04:36 PM

Thank you very much I was almost thinking no one has run into this problem before, but I knew they're would be a guru somewhere that could help me out I really appreciate, it I'll try this out tonight when I get in from work.

11-12-2015, 04:49 PM	#1
BadAquaBluSS H-Town Camaro Club Drives: 2010 ABM 1SS/RS, Red 85 Z28 Join Date: Feb 2013 Location: Spring TX. Posts: 178	3.91 gear swap tune adjustment with HP tuners Hi guys sorry haven't been on here much, had a series of things going wrong in the family the last of which my dad passed away, now that I have my mom situated and the other accompanying things done , I'm ready to get back on my car I recently purchased and installed an Eaton True Track with 3.91 gears in my car, i've made a couple of test hits car feels really good, but I noticed my speedo is off by about 5 mph, anyone know the settings for going from the 3.45 to 3.91 in HP Tuners? Anyone know the settings for going from the 3.45 to 3.91 in HP tuners? If anyone can let me have a stock 1LE tune to look at, it would be greatly appreciated thanks guys. __________________ AGP Twin Turbo, RPS Triple Carbon Clutch, ZL1 Diff with 3.73 gears and Kooks 3" Stainless Steel Exhaust with X Crossover, Kooks Stainless Steel Mufflers, Go Fast Bits EBC, AEM Methanol injection and AEM gauges UEGO and Fuel pressure, Livernois's dual fuel pump, KB Boost a Pump, AUS 1000cc injectors, Full BMR suspension with Koni shocks, JDP Color Changing Halos, Color Changing Scanner Light Bar and Rockford Fosgate T Series Amp's Kicker L7 Sub's. Build Thread: http://www.camaro5.com/forums/showthread.php?t=400372

11-13-2015, 04:36 PM	#3
BadAquaBluSS H-Town Camaro Club Drives: 2010 ABM 1SS/RS, Red 85 Z28 Join Date: Feb 2013 Location: Spring TX. Posts: 178	Thank you very much I was almost thinking no one has run into this problem before, but I knew they're would be a guru somewhere that could help me out I really appreciate, it I'll try this out tonight when I get in from work. __________________ AGP Twin Turbo, RPS Triple Carbon Clutch, ZL1 Diff with 3.73 gears and Kooks 3" Stainless Steel Exhaust with X Crossover, Kooks Stainless Steel Mufflers, Go Fast Bits EBC, AEM Methanol injection and AEM gauges UEGO and Fuel pressure, Livernois's dual fuel pump, KB Boost a Pump, AUS 1000cc injectors, Full BMR suspension with Koni shocks, JDP Color Changing Halos, Color Changing Scanner Light Bar and Rockford Fosgate T Series Amp's Kicker L7 Sub's. Build Thread: http://www.camaro5.com/forums/showthread.php?t=400372

11-13-2015, 06:45 AM	#2
etmx183 Drives: 2012 Camaro 2LT RS Join Date: Mar 2012 Location: Baltimore, Maryland Posts: 1,633 View My Garage	Which version of HP Tuners Editor are you using? Hope this helps you out For you Do It Yourself folks with HP Tuners, all you have to do is pull up the Speedo tab, Click Speedometer and you'll see two windows for current and new. Enter your new tire size (if it changed or old size if it didnt) and your new gear ratio. Click the auto scale transmission tables YES and click commit. Manual no further adjustments needed and your speedometer will be on target. For the Automatic guys, same thing and after you click commit, HP Tuners will automatically rescale all your shift points for you for the new tire size and gears.