CUSCO 4.55 FINAL DRIVE installed. - Page 10 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

enjoyminutemaid · 02-02-2013, 12:46 PM

Speedometer must be reading 8-9% too high as well. Must have to do mental conversion to remember, or get different speedometer.

ft_sjo · 02-02-2013, 01:15 PM

Quote:

Originally Posted by enjoyminutemaid

Speedometer must be reading 8-9% too high as well. Must have to do mental conversion to remember, or get different speedometer.

RCE already confirmed the speedo is unaffected. Someone else also suggested the ABS sensors are used for the vehicle speed calc. Those two statements support eachother.

enjoyminutemaid · 02-02-2013, 02:33 PM

Quote:

Originally Posted by ft_sjo

RCE already confirmed the speedo is unaffected. Someone else also suggested the ABS sensors are used for the vehicle speed calc. Those two statements support eachother.

Ah I missed that. Thanks for the clarification.

EDIT: Does this mean that larger wheel and tire sizes (larger overall diameter) won't affect speedometer reading?

Pete · 02-02-2013, 03:09 PM

Quote:

Originally Posted by OrbitalEllipses

When someone releases a taller 6th gear, which no one has yet.

Got a ride in it today; you can feel the quickness. Most importantly the torque valley goes by quicker. So while the dip obviously isn't gone since you didn't touch power you're through that area of the powerband a LOT quicker. My only concern would be highway miles as well.

This would complement my S/C kit really well as long as I have a nice tall gear to cruise with. Any of you guys think a new 6th will be put out anytime soon? IDK how common that is, this is the first time I learned you could modify gearing like that. Fun.

OrbitalEllipses · 02-02-2013, 03:17 PM

Quote:

Originally Posted by Pete

This would complement my S/C kit really well as long as I have a nice tall gear to cruise with. Any of you guys think a new 6th will be put out anytime soon? IDK how common that is, this is the first time I learned you could modify gearing like that. Fun.

Uncommon. Usually full gearsets or nothing. Frankly, you may want a TALLER final drive. You'll have more power from the kit so acceleration is no big deal anymore...you can afford to lower cruising RPMs by swapping in a 3.7xx FD.

Pete · 02-02-2013, 03:25 PM

Quote:

Originally Posted by OrbitalEllipses

Uncommon. Usually full gearsets or nothing. Frankly, you may want a TALLER final drive. You'll have more power from the kit so acceleration is no big deal anymore...you can afford to lower cruising RPMs by swapping in a 3.7xx FD.

Yeah, true. I'll wait to see what it's like after I get it installed before I make any gearing changes. Thanks.

OrbitalEllipses · 02-02-2013, 03:27 PM

Quote:

Originally Posted by Pete

Yeah, true. I'll wait to see what it's like after I get it installed before I make any gearing changes. Thanks.

In any case swapping just a gear for MPG purposes usually doesn't pay for itself due to how much it costs vs. fuel savings.

Pete · 02-02-2013, 03:39 PM

Quote:

Originally Posted by OrbitalEllipses

In any case swapping just a gear for MPG purposes usually doesn't pay for itself due to how much it costs vs. fuel savings.

Not so much about savings as sanity, I don't think I would like making inter-state drives at 4000 RPM.

OrbitalEllipses · 02-02-2013, 03:42 PM

Can't say I'm excited by that either.

Racecomp Engineering · 02-02-2013, 04:45 PM

I took a "forum member" for a ride today that in hind site....was WACKED ! Hope you didnt mind that XX_+mph uphill pull we were doing before I had to get on the brakes !

M.

Racecomp Engineering · 02-02-2013, 04:52 PM

Quote:

Originally Posted by BadCompany235

If they drive your car they would know, but it would take a master tech or enthusiast to single this out and deny any drive train work.

I think maybe...if your car has exhaust and is modified they mightjust think its THAT much faster........but yes a good tech or fellow enthusiast will hit the nail on the head.

serialk11r · 02-02-2013, 05:18 PM

Quote:

Originally Posted by OrbitalEllipses

In any case swapping just a gear for MPG purposes usually doesn't pay for itself due to how much it costs vs. fuel savings.

Well if you drive a shitton of highway miles (especially if you like to go fast on the highway, like 80mph, cuz friction usually gets pretty bad over 3000rpm) and it's a rather big gearing change then it could end up paying for itself over time, but the primary use would probably be noise and possibly reduced oil consumption? At lower engine speeds the pitch of the exhaust is lower and the mechanical noise is much reduced so it's far more tolerable.

Allch Chcar · 02-02-2013, 05:31 PM

Quote:

Originally Posted by Racecomp Engineering

I took a "forum member" for a ride today that in hind site....was WACKED ! Hope you didnt mind that XX_+mph uphill pull we were doing before I had to get on the brakes !

M.

Was it OrbitalEllipses?

Quote:

Originally Posted by OrbitalEllipses

Got a ride in it today;...

efactor84 · 02-02-2013, 06:46 PM

Interesting and great article over the final drive mod. I learn something new.

02-02-2013, 06:46 PM	#140
efactor84 Senior Member Join Date: Jan 2013 Drives: 2015 Scion FR-S Location: North Carolina Posts: 160 Thanks: 0 Thanked 19 Times in 17 Posts Mentioned: 1 Post(s)	Interesting and great article over the final drive mod. I learn something new. Last edited by efactor84; 02-02-2013 at 07:07 PM.

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02-02-2013, 12:46 PM	#127
enjoyminutemaid Senior Member Join Date: Jun 2012 Drives: Subaru BRZ Limited WRB Manual Location: RI/MA Posts: 212 Thanks: 185 Thanked 46 Times in 29 Posts Mentioned: 2 Post(s)	Speedometer must be reading 8-9% too high as well. Must have to do mental conversion to remember, or get different speedometer.

02-02-2013, 03:42 PM	#135
OrbitalEllipses Banned Join Date: Jan 2012 Drives: Attitude Location: MD Posts: 10,046 Thanks: 884 Thanked 4,890 Times in 2,903 Posts Mentioned: 123 Post(s)	Can't say I'm excited by that either.

02-02-2013, 04:45 PM	#136
Racecomp Engineering Join Date: Nov 2011 Drives: 2016 BRZ, 2012 Paris Di2 & 2018 STI Location: Severn, MD Posts: 5,520 Thanks: 3,542 Thanked 7,416 Times in 3,034 Posts Mentioned: 311 Post(s)	I took a "forum member" for a ride today that in hind site....was WACKED ! Hope you didnt mind that XX_+mph uphill pull we were doing before I had to get on the brakes ! M.

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