I cant seem to get my speedo calibrated what am I doing wrong?My gear ratio was set to 3:72 so I changed to to 3:73 like its supposed to be. I am running 295/70/17 Nitto Terra Grapplers (606.38 revs per mile)... I changed all the tables in the speedo section but no matter what I do nothing changes. it always reads 5MPH less than what I am really doing, according to gps...
Can someone please look at the rest too? mainly PW and timing
Last edited by 22eco; 08-14-2010 at 02:10 AM.
2002 Pontaic Sunfire 4 Door 2.2 Ecotec
15.9best 1/4 @ 87mph (I/H/E)
2005 Silverado 2500HD 2WD LLY, Amsoil in the motor, 4" MBRP DP back, 4-6" tip, EGR Blocker plate, small HP Tune, boost and pyro gauge. PPE shim kit.
14.8 best 1/4 @ 91 MPH
@ aprox 68*
It looks like your tire has a height of about 33.26 so I would compare all your settings to stock, and put everything back to stock then save then go in and enter your 3.73 gear ratio and 33.26 tire height hit the change button and save new calculations you shouldn't have to change anything else. Post back with your results.
2006 GMC Sierra 2500HD CCSB 6.6L Duramax LBZ
HPTuners, Transgo Jr., RDS EGR Delete Tube EGR and cooler removed with blocker plate at up pipe, PCV Reroute Kit
Isspro A-pillar Boost and Pyro Gauges
2001 Chevy Tahoe 5.3L
HPTuners, Transgo Shift Kit, Innovate Motorsports LC-1 Wideband
2001 Oldsmobile Alero 3.4L
HPTuners
I don't have any of that calculation button mess. so maybe that is my issue? also there is nowhere to enter the tire size.
2002 Pontaic Sunfire 4 Door 2.2 Ecotec
15.9
2005 Silverado 2500HD 2WD LLY, Amsoil in the motor, 4" MBRP DP back, 4-6" tip, EGR Blocker plate, small HP Tune, boost and pyro gauge. PPE shim kit.
14.8 best 1/4 @ 91 MPH
@ aprox 68*
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