Miguels Posted September 3, 2014 Report Share Posted September 3, 2014 if it has larger wheels then it would say you are going slower not faster.. the rpm also goes lower. smaller wheels tend to make it say its going faster than it should.. one way to find out is to spin the wheels a whole turn and see how many times the drive shaft turns.. lets say you mark the tire and spin it. if the drive shaft spins a bit over 4 turns then you have 4.11 if it spins 4 1/2 it has 4.56. if it spins almost 4 turns you have 3.73. keep in mind that the size of wheels will make it be off by a bit my logshttp://www.stevemead...-my-new-set-up/my blow through loghttp://www.stevemead...future-updates/ 96 ss http://www.stevemeadedesigns.com/board/topic/164094-96-impala-ss-build/ Link to comment Share on other sites More sharing options...
Miguels Posted September 3, 2014 Report Share Posted September 3, 2014 im guessing they changed gearing and wheels. tuned the ecm to that combo and removed the wheels when they sold it.. see if you can get a set of 22's or 24's and see which one corrects the issue my logshttp://www.stevemead...-my-new-set-up/my blow through loghttp://www.stevemead...future-updates/ 96 ss http://www.stevemeadedesigns.com/board/topic/164094-96-impala-ss-build/ Link to comment Share on other sites More sharing options...
OrionStang Posted September 3, 2014 Report Share Posted September 3, 2014 if it has larger wheels then it would say you are going slower not faster.. the rpm also goes lower. smaller wheels tend to make it say its going faster than it should.. one way to find out is to spin the wheels a whole turn and see how many times the drive shaft turns.. lets say you mark the tire and spin it. if the drive shaft spins a bit over 4 turns then you have 4.11 if it spins 4 1/2 it has 4.56. if it spins almost 4 turns you have 3.73. keep in mind that the size of wheels will make it be off by a bit Smart. Didn't even think about that test. SMD Super Seller My Feedback Thread Link to comment Share on other sites More sharing options...
Skax Posted September 3, 2014 Author Report Share Posted September 3, 2014 im guessing they changed gearing and wheels. tuned the ecm to that combo and removed the wheels when they sold it.. see if you can get a set of 22's or 24's and see which one corrects the issueill try that first thing in the morning and post back I appreciate the help 2002 Mustang GT Procharged Procharger P1SC Supercharger, 8psi Procharger Intercooler, Headers, Borla Off Road X-Pipe Exhaust, Mass Airflow Upgraded Fuel Injectors SCT Flash Chip (Excaliber II), Throttle Body, Lowering Springs, Carbon Fiber Hood -Front 275/40ZR17 -Rear 315/35ZR17 5.0 Short Shifter 3.55 Gears Link to comment Share on other sites More sharing options...
Miguels Posted September 3, 2014 Report Share Posted September 3, 2014 if it has larger wheels then it would say you are going slower not faster.. the rpm also goes lower. smaller wheels tend to make it say its going faster than it should.. one way to find out is to spin the wheels a whole turn and see how many times the drive shaft turns.. lets say you mark the tire and spin it. if the drive shaft spins a bit over 4 turns then you have 4.11 if it spins 4 1/2 it has 4.56. if it spins almost 4 turns you have 3.73. keep in mind that the size of wheels will make it be off by a bit Smart. Didn't even think about that test. it would be more accurate if he removes wheels and brakes and spins the axles. and the accurate way is be removing the gears and counting the teeth if it has no marking.. if it was chevy he could remove the cover and use a flashlight to look at the marking on the pinion my logshttp://www.stevemead...-my-new-set-up/my blow through loghttp://www.stevemead...future-updates/ 96 ss http://www.stevemeadedesigns.com/board/topic/164094-96-impala-ss-build/ Link to comment Share on other sites More sharing options...
tommylee11491 Posted September 29, 2014 Report Share Posted September 29, 2014 sure it doesnt have a km/h mph option? maybe your reading km/h? Link to comment Share on other sites More sharing options...
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