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Buell Forum » 1125R Superbike Board » Archives 001 » Archive through April 12, 2010 » Gear Position Indicator « Previous Next »

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Avc8130
Posted on Wednesday, April 07, 2010 - 09:52 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Does anyone know what is reponsible for calculating the gear shown on the gear posiiton indicator? I assume it uses engine RPM and the VSS to calculate what gear it is in. Is this calculation done in the ECM or the cluster?
ac
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Froggy
Posted on Wednesday, April 07, 2010 - 10:01 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Calculation is done in the cluster, I just assumed it is VSS and RPM as thats how most aftermarket ones work.
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Avc8130
Posted on Wednesday, April 07, 2010 - 10:07 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
So if I have an R and install a CR cluster the GPI will be off? Do the clusters have different part numbers R vs CR?
ac
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Kirb
Posted on Wednesday, April 07, 2010 - 10:09 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
I thought the ECM flash determines what goes on in the cluster, so the calc must happen in the ECM.
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Avc8130
Posted on Wednesday, April 07, 2010 - 12:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
It looks like the 09 CR and R share the same part number for the instrument cluster. I am thinking the ECM must do the math...
ac
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Avc8130
Posted on Wednesday, April 07, 2010 - 08:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Could it be possible that the cluster "learns" how to calculate the gear position when it is "mated" to the ecm?
ac
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Gemini
Posted on Wednesday, April 07, 2010 - 08:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
the math is done in the ecm. review the data that ecmspy has for your epprom. it's on there. right now the files are under temporary lock down
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