Starting to Learn on 95 G30 5.7 for Towing

**donf** · 08-27-2017

I think I may have the bin, but I am not sure it's correct.

**donf** · 08-27-2017

Does anyone happen to know the math that is used to come up with the RPM/VSS Ratio? I have my stock bin downloaded. I compared it to a few other bin files here and most of the transmission settings were identical except for the NV ratio for the final drive differences. Billy, I tried to PM you but it says your inbox is over the storage limit.

Edit: I found a few different formulas for the N/V ratio, but this one seems to be the most relevant? Ratio = (Tire Rev's Mile x Gear Ratio)/60; http://www.gearhead-efi.com/Fuel-Inj...ht-programming

**myburb** · 08-28-2017

I think that is the correct formula. Looks like with your new 4.10 depending on your tire size should be about 47.xx.

**donf** · 08-28-2017

Thanks, I got close to that using tireracks revolution per mile for 24575R16. For some reason different tire manufactures give slightly different specs, but I think it will be close enough.

**myburb** · 08-28-2017

While I had the calc out, with that tire size it should be 45.27

**donf** · 08-31-2017

I was able to burn a few different chips over the last few days, so some success! Thanks to John and Billy and the others who helped out here. There still is a lot to learn, but when things go right it helps!

**donf** · 09-06-2017

More success! The problem with erratic readings in Tunerpro when the engine was running was driving me nuts. 1320_John loaned me one of his custom bluetooth ALDL to try. Using his adapter and his android software I now have a stable connection to data with the engine off and engine running.