Top Fuel

iTrader: (8)

alright I just recently swapped a th350 into my z28 that used to have a 4l60e. I went ahead and spliced the abs sensor up front for the free speedo fix. my problem is that my hptuners will not accept the 1.175 as a valid gear ratio that i'm supposed to tune in. the smallest ratio it will accept is a 2.00. I suck at math, so I ask you kind folks to figure out for me what tire size i need to plug in to make up for the difference in the gear ratio. I am supposed to have a 1.175 gear ratio and 26" tire to make my speedo work correctly. so what tire size will i need to plug in with a 2.00 gear ratio to get the same end ratio?

thanks,
Steve

Z28/2002

iTrader: (27)

Might wanna also try this in the PCM Diagnostics & Tuning Section as well. You might get a little more help there