CUSCO 4.55 FINAL DRIVE installed. - Page 8 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

industrial · 02-01-2013, 09:48 AM

Of all the race car builds so far, the Trd griffon is my favorite. Adding lightness like a bauce.

serialk11r · 02-01-2013, 10:09 AM

Quote:

Originally Posted by OrbitalEllipses

My WRX was at 3500-4000 by 65-70MPH...it was hellish. 3" turboback and straight through muffler. Sounded glorious, but the drone...never again!

I know, 70mph is about 3900rpm here. Fastest trip I ever made was a consistent 3800rpm, and my ears were ringing after 30 minutes. 3000rpm is already kind of droney for me, 2700 is the highest before I get really annoyed at the sound. Doesn't help that I can hear the alternator fan through the firewall, it sounds pretty cool when accelerating (like a supercharger) though.

So, I can't imagine sitting at 5000rpm for a significant period of time, that sound would drive me nuts.

Tommy_H · 02-01-2013, 10:42 AM

@RCE

I've now read the whole thread up to here, it is intriguing. Tell me please: You only changed the final gear to the 4.556, right? You did not (yet) put in the other Cusco gear mod of longer 1st and 2nd gear, right?

Do you plan to change the 1st and 2nd gear as well in the future?

ATL BRZ · 02-01-2013, 12:18 PM

Please get some footage running through the gears @Racecomp Engineering!

Racecomp Engineering · 02-01-2013, 01:13 PM

Quote:

Originally Posted by Tommy_H

@RCE

I've now read the whole thread up to here, it is intriguing. Tell me please: You only changed the final gear to the 4.556, right? You did not (yet) put in the other Cusco gear mod of longer 1st and 2nd gear, right?

Do you plan to change the 1st and 2nd gear as well in the future?

Correct. I wont do a 1 and 2nd because for me this is for track days(road course) so I never use those lower gears. I would imagine an autocrosser mightwant those lowr gears swapped but I dont know. I havent autocrossed since nationals back in the EIGHTIES ! lol

Myles

Racecomp Engineering · 02-01-2013, 01:15 PM

Quote:

Originally Posted by ATL BRZ

Please get some footage running through the gears @Racecomp Engineering!

Will do. I've been busy working on the press release of our BRZ/FR-S HOLLOW sway bars and yellows and sways combo ! (shameless plug).

Mw

Racecomp Engineering · 02-01-2013, 01:19 PM

Quote:

Originally Posted by Captain Insano

That Griffon vid is awesome.

i put a brick in my lap just to watch that video....

Mw

Racecomp Engineering · 02-01-2013, 01:21 PM

Quote:

Originally Posted by industrial

Of all the race car builds so far, the Trd griffon is my favorite. Adding lightness like a bauce.

Do the math, at 2200 lbs that thing is a BEAST ! even adding a cage at 110lbs its still a beast !

The lap time says it all !

Myles

wootwoot · 02-01-2013, 01:23 PM

Quote:

Originally Posted by Racecomp Engineering

i put a brick in my lap just to watch that video....

Mw

LOL.

sw20kosh · 02-01-2013, 03:13 PM

Quote:

Originally Posted by Racecomp Engineering

Do the math, at 2200 lbs that thing is a BEAST ! even adding a cage at 110lbs its still a beast !

The lap time says it all !

Myles

How on earth did they get the weight down so low?????

kanundrum · 02-01-2013, 03:15 PM

Probably removed every single interior component and A/C

4U-GSE · 02-01-2013, 03:30 PM

Quote:

Originally Posted by Racecomp Engineering

in "theory" yes but the reality is on the track carrying speed is FAR more important than the acceleration in a LOWER (mph limiting) gear only, as you cited, to have to upshift( loss of time) shortly there after. So the overall shorter FD allows for an easier gear to be pushed. When I reviewed my in car at MY track its win win for my lap times. I think a SHORTER FD than the 4.55 for ME at MY track would cause for an extra shift in 3 points on the lap.

The other thing is and I see it in my students for the last 15 years, is the tendency to buzz around in the lower gears which makes the car MUCH more jerky when you lift a hair which causes weight transfer and loose handling. Its better to commit to the taller gear and put your foot down and save a shifter later when its possible.

Myles

Thank you so much for the informative and professional reply! Now you really have me leaning towards this mod.

OrbitalEllipses · 02-01-2013, 03:31 PM

Quote:

Originally Posted by kanundrum

Probably removed every single interior component and A/C

Acid dipped chassis or got one from the production line before it gets coatings and sound deadening, too.

wootwoot · 02-01-2013, 04:44 PM

Would would be the equivalent hp/tq gain as changing to a 4.55 final drive?

02-01-2013, 12:18 PM	#102
ATL BRZ TEQSPORT Brand Manager Join Date: Jun 2012 Drives: '24 GR86 + '16 FR-S Location: Atlanta Posts: 3,666 Thanks: 3,725 Thanked 4,137 Times in 1,707 Posts Mentioned: 90 Post(s) Tagged: 6 Thread(s)	Please get some footage running through the gears @Racecomp Engineering! __________________ ________________________________Toyota \| Lexus Parts & Performance Specialists__________________________________

02-01-2013, 03:15 PM	#109
kanundrum Senior Member Join Date: Jan 2012 Drives: 2013 Whiteout FR-S Location: Laurel, MD Posts: 5,364 Thanks: 2,704 Thanked 3,016 Times in 1,711 Posts Mentioned: 106 Post(s) Tagged: 3 Thread(s)	Probably removed every single interior component and A/C __________________ Ive spent most of my life racing... The rest I just wasted

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02-01-2013, 09:48 AM	#99
industrial Add lightness! Join Date: Apr 2012 Drives: 17' WRX Location: Boston Posts: 1,253 Thanks: 380 Thanked 888 Times in 411 Posts Mentioned: 20 Post(s) Tagged: 0 Thread(s)	Of all the race car builds so far, the Trd griffon is my favorite. Adding lightness like a bauce.

02-01-2013, 10:42 AM	#101
Tommy_H Member Join Date: Jan 2013 Drives: Toyota GT86 Location: Zurich Switzerland Posts: 16 Thanks: 17 Thanked 2 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	@RCE I've now read the whole thread up to here, it is intriguing. Tell me please: You only changed the final gear to the 4.556, right? You did not (yet) put in the other Cusco gear mod of longer 1st and 2nd gear, right? Do you plan to change the 1st and 2nd gear as well in the future?

02-01-2013, 04:44 PM	#112
wootwoot Senior Member Join Date: Jul 2012 Drives: FRS Location: Cali Posts: 1,558 Thanks: 188 Thanked 462 Times in 264 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	Would would be the equivalent hp/tq gain as changing to a 4.55 final drive?

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