CUSCO 4.55 FINAL DRIVE installed. - Page 3 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Visconti · 01-29-2013, 10:50 AM

Do you guys having anything that will increase top speed?

ZC6BRZ · 01-29-2013, 11:04 AM

Quote:

Originally Posted by Visconti

Do you guys having anything that will increase top speed?

The JDM base 86 and BRZ are 3.727 final, and so is the IS250, so you can buy either of these two to increase top speed.

41201-80050 - Ring & Pinion Gear Set, 3.727:1
41201-80052 - Ring & Pinion Gear Set, 3.909:1

from this thread:

http://www.ft86club.com/forums/showthread.php?t=7190

*KID* · 01-29-2013, 11:07 AM

How much will that run for?

xjohnx · 01-29-2013, 11:09 AM

Would love to see a video of some full throttle runs to illustrate just how quickly it runs through each gear.

Calum · 01-29-2013, 12:05 PM

Quote:

Originally Posted by xjohnx

Would love to see a video of some full throttle runs to illustrate just how quickly it runs through each gear.

The difference wouldn't be huge, something like this would probably amount to about .25 seconds in the quarter mile. Which is a sold gain for the money, especially if you can do the install yourself. It's more about the old Smokey Yunick adage, make as much power as you can, and gear to suit. For longevity and reliability RCE seems to be happy with the power they're making, now it's time to work on the gearing.

I REALLY like this mod, it's something that no one would know was done to the car unless you tell them. It will leave a lot of people tearing their hair out.

Myles/Andrew someone asked for rpm vs speed for 60/70/80 mph earlier in the thread. I think it was missed. I'd like to see the answer as well if you've noticed. Also, what tire size are you running. IIRC you guys went a little taller when you moved to the 18's. And finally, how different is the noise level in the car?

Racecomp Engineering · 01-29-2013, 12:09 PM

There's a chart somewhere I need to dig up and post. Myles did post rpm @ 70 earlier.

- drew

JDKane527 · 01-29-2013, 01:11 PM

IS250, IS300, and 86 share same differential size. All are interchangeable.

IS300 had an optional factory LSD, which is similar to the standard Torsen LSD found in the 86.

IS250 only has open differential from the factory.
MT comes with 3.7:1, and AT comes with 3.9:1

Some guys, including myself, have found used IS300 LSDs and dropped them in. With the release of the FRS, some people will have the option of getting a new one to install, but they're not cheap new haha.

OrbitalEllipses · 01-29-2013, 01:12 PM

Quote:

Originally Posted by Racecomp Engineering

There's a chart somewhere I need to dig up and post. Myles did post rpm @ 70 earlier.

- drew

Myles posted the Cusco chart on your Facebook.

ATL BRZ · 01-29-2013, 01:19 PM

Racecomp Engineering · 01-29-2013, 01:21 PM

Quote:

Originally Posted by Visconti

Do you guys having anything that will increase top speed?

yeah...a TURBO ! hahahaha. JK.

BTW nice work on the tuning. I feel honored you even have a eyeball to view this thread.....lol...as you are the busiest guy on this forum.

tuning literally in your sleep !

Myles

Grimlock · 01-29-2013, 01:25 PM

I'm starting to like this idea. A very good mod that would be stealthy.

Racecomp Engineering · 01-29-2013, 01:31 PM

Quote:

Originally Posted by OrbitalEllipses

Myles posted the Cusco chart on your Facebook.

Ahh that's right. We've got another one in pdf form with more detail (it's a table). I'll either google doc it or put it on our facebook tonight.

- Andrew

illmatic · 01-29-2013, 01:41 PM

Great work guys.

Here's autofactory's 5.1 FD.
[ame="http://www.youtube.com/watch?v=QLjVPGJKNm4"]AUTO　FACTORY　86　ExhaustテストinFSW - YouTube[/ame]

lazyluka · 01-29-2013, 02:04 PM

Quote:

Originally Posted by ZC6BRZ

Nope. Speedo measures tranny.

You do realise what you said contradicts itself.
If a speedo measures tranny and you modify the diff, it will offset the speedo.

Seeing as there is no error in the speedo, I would say the 86/BRZ may be using the ABS/TC sensors in the wheel's to get the speed, so modifying the driveline, apart from the wheel sizes, should not affect the speedo in any way. Of course I could be wrong, but if I was Toyota and wanted to cut cost's that's the way I would measure speed.

This is definitely a mod on my TO DO list. It will make it into more of a "Type R" kind of car.

01-29-2013, 11:07 AM	#31
KID 86-er Join Date: May 2012 Drives: BRZ tS Location: Laredo, TX Posts: 970 Thanks: 195 Thanked 253 Times in 175 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	How much will that run for? __________________ 2018 Subaru BRZ ts 020/500 - My Daily, work car, and track car

01-29-2013, 01:19 PM	#37
ATL BRZ Driving Coach Join Date: Jun 2012 Drives: BRZ Location: Atlanta Posts: 3,666 Thanks: 3,723 Thanked 4,137 Times in 1,707 Posts Mentioned: 90 Post(s) Tagged: 6 Thread(s)	__________________ __________________________Pure Motorsport: JDL Turbo BRZ Track Build_______________________

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01-29-2013, 10:50 AM	#29
Visconti Banned Join Date: Apr 2012 Drives: 05 STi Location: Norwalk, CT Posts: 2,843 Thanks: 196 Thanked 3,188 Times in 1,197 Posts Mentioned: 375 Post(s) Tagged: 2 Thread(s)	Do you guys having anything that will increase top speed?

01-29-2013, 11:09 AM	#32
xjohnx Grip>Slip Join Date: Jun 2012 Drives: 13 SWP BRZ Ltd - Innovate Powered! Location: RVA Posts: 3,563 Thanks: 656 Thanked 1,716 Times in 1,031 Posts Mentioned: 45 Post(s) Tagged: 3 Thread(s)	Would love to see a video of some full throttle runs to illustrate just how quickly it runs through each gear.

01-29-2013, 12:09 PM	#34
Racecomp Engineering Join Date: Nov 2011 Drives: 2016 BRZ, 2012 Paris Di2 & 2018 STI Location: Severn, MD Posts: 5,403 Thanks: 3,416 Thanked 7,241 Times in 2,962 Posts Mentioned: 303 Post(s) Tagged: 9 Thread(s)	There's a chart somewhere I need to dig up and post. Myles did post rpm @ 70 earlier. - drew

01-29-2013, 01:11 PM	#35
JDKane527 Senior Member Join Date: Jan 2013 Drives: Asphalt Scion FR-S Location: Los Angeles, CA Posts: 499 Thanks: 274 Thanked 215 Times in 136 Posts Mentioned: 10 Post(s) Tagged: 1 Thread(s)	IS250, IS300, and 86 share same differential size. All are interchangeable. IS300 had an optional factory LSD, which is similar to the standard Torsen LSD found in the 86. IS250 only has open differential from the factory. MT comes with 3.7:1, and AT comes with 3.9:1 Some guys, including myself, have found used IS300 LSDs and dropped them in. With the release of the FRS, some people will have the option of getting a new one to install, but they're not cheap new haha.

01-29-2013, 01:25 PM	#39
Grimlock Senior Member Join Date: Dec 2011 Drives: BRZ and NA Location: Annapolis, MD Posts: 878 Thanks: 46 Thanked 270 Times in 167 Posts Mentioned: 11 Post(s) Tagged: 2 Thread(s)	I'm starting to like this idea. A very good mod that would be stealthy.

01-29-2013, 01:41 PM	#41
illmatic Senior Member Join Date: Oct 2011 Drives: BRZ Limited 6MT, 02 AW, 03PSM WRX Location: United States Posts: 347 Thanks: 511 Thanked 153 Times in 63 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Great work guys. Here's autofactory's 5.1 FD. [ame="http://www.youtube.com/watch?v=QLjVPGJKNm4"]AUTO　FACTORY　86　ExhaustテストinFSW - YouTube[/ame]

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