Civic SI 9th gen custom gear ratio

2012+ US/Canadian Civic Si / 2013+ ILX
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Garrett_si
Posts: 248
Joined: Wed May 17, 2006 9:49 am

Civic SI 9th gen custom gear ratio

Post by Garrett_si »

Hi guys, with Flashpro manager we could change gear ratios like on 8th gen, but don't seem to work, wheels sensor work all good with exact real chassis speed

I have Syncrotech 1-6 full gearset, 1-4 are short ratio, with 4.0 Final drive

1st 3.13
2nd 2.167
3rd 1.647
4th 1.286
5th 1.043
6th 0.851
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Spunkster
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Location: Hondata

Re: Civic SI 9th gen custom gear ratio

Post by Spunkster »

Are you referring to the dash and datalogged speed not being correct?
Garrett_si
Posts: 248
Joined: Wed May 17, 2006 9:49 am

Re: Civic SI 9th gen custom gear ratio

Post by Garrett_si »

Yes, Dash display and Flashpro Manager VSS are wrong
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Spunkster
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Joined: Fri Sep 20, 2002 5:06 pm
Location: Hondata

Re: Civic SI 9th gen custom gear ratio

Post by Spunkster »

I'm sorry, but there is no way to correct this from the ECU as it doesn't output these signals.
Vanwille
Posts: 4
Joined: Wed Nov 25, 2020 9:39 am

Re: Civic SI 9th gen custom gear ratio

Post by Vanwille »

Sorry if late to the party. Spunkster is correct there is no way to correct mph via the input into flashpro, a Dakota Digital sgi-100bt must be wired into the the VSS on the trans, then you can dowload the app and calibrate via satellite speed which is eerie accurate. As that is the setup that i have done, it easy, the only real downfall is it must be mounted in the cab away from the elements.
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