A4 to M6 Conversion speedo error

[Deeavi]

I just did an A4 to M6 conversion on my 98 Z28. Now my speedometer is way off; like showing 20 mph @ actual 50 mph. I downloaded a stock '98 M6 bin file and copied my tune over to it. Then I reflashed the computer, but it is still off. I have 26" tires with 3.73 gears

Any ideas?

[Bill@HPTuners]

what version are you using that its saving in bin format still? I checked the calculations on a 98 hpt file I had and the vss/mile, vss/rev-trans, & trans revs/mile were all completely different then what your bin says...Maybe there was a bug in the version your using and thats why its fubard.

I got:
48896
17.0000
837.3632

compared to your
115140
40.0000
2878.5936

[Deeavi]

I am using 2.16 I just saved it as a bin file. All I did was change the extension from .hpt to .bin. I will include the corrected one this time

I know the numbers look a little out of whack

[Bill@HPTuners]

one way or the other i think your vss stuff is off which is why your file isnt working correctly.

[Deeavi]

I cleared out the numbers and recalculated. I came up with:

49176
17.000
842.1679

I will reflash and see what happens

[Bill@HPTuners]

sounds much better

[Deeavi]

sounds much better

Thanks for your help.

That did it. It is reading correctly now. If I can get my idle working right, I will be good to go.

[Bill@HPTuners]

no problem