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Speedo help

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Old

Jul 16, 2010 | 08:01 PM

#1

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Speedo help

I'm working on a 1998 V6/5spd Car that a 2002 LS1/T56 was put into. I got the Tach to work properly with the V6 Gauges, for some reason the speedo is off.
The Rear has 3.89's in it, I set the Pulse value to 17.000 for the T56, tire size is 25.8, ratio set at 3.89. Car has stock tires on it. I didn't mess with the other value that is there..forgot what it was called.

At 65 it's reading 50mph on the speedo..to me everything seems setup right but I could be overlooking something..any input appreciated.

Old

Jul 17, 2010 | 11:11 AM

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did u try calc your tires size and divide your gear ratio and input that in gear ratio on hp i got 6.63 put that # in see if it correct for ya

Old

Jul 17, 2010 | 12:14 PM

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It won't let me enter that value for the V8 tabled.

I need to find the formula to calculate VSS Pulse/mile... That's my issue.

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Jul 17, 2010 | 02:48 PM

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Quote:

Originally Posted by the_merv

It won't let me enter that value for the V8 tabled.

I need to find the formula to calculate VSS Pulse/mile... That's my issue.

try 51970 pulses / mile

Bird

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Jul 17, 2010 | 10:32 PM

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Ya that's the same number I got bird..I found the formula so it's not a secret anymore..lol

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Jul 18, 2010 | 12:01 PM

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do you use ls1 computer ? or save your tune file and pm me i take a look at for ya

Old

Jul 18, 2010 | 10:55 PM

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I got it bud..I appreciate it tho..

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Old

Jul 19, 2010 | 10:53 PM

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congrat what u do to get it work? for future reference

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Old

Jul 20, 2010 | 01:46 PM

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I got the Formula, did the math and plugged the correct number in to the VSS Pulse Per Mile spot in the Speedo Calibration Table in HP Tuners.

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hp, swap, t56, tuners, vss

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