Stock Gearbox max power - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Ski.mask · 11-18-2018, 06:17 PM

Hey guys and girls im currently building a forged fa20

just wanted to know more about these gearboxes what sort of torque can these gearboxes handle for street and track use has anyone had any experiences with them. Im probably gonna have 400 to 450whp

StraightOuttaCanadaEh · 11-18-2018, 07:10 PM

I know the auto gearbox supposedly can handle 450 whp as I was told by a guy who was building his engine and he had an auto. I think the common consensus is that anything above 350 you're on thin ice with a manual

Ski.mask · 11-18-2018, 07:25 PM

Quote:

Originally Posted by StraightOuttaCanadaEh

I know the auto gearbox supposedly can handle 450 whp as I was told by a guy who was building his engine and he had an auto. I think the common consensus is that anything above 350 you're on thin ice with a manual

Hmm yeah that what i thought too, does anyone do gears for these or does it have to be a dogbox

Trueweltall · 11-18-2018, 08:20 PM

It's not the horsepower that destroys the manual gear box, it's the amount of torque, with 350ft/lbs being the limit IIRC. Stock clutch is good for around 210-220 ft/lbs.

Bonburner · 11-18-2018, 09:23 PM

Doesn't the gear you're trying to find out also matter?

I recall reading something about the first three gears being sturdier being triple cones and some FI people would rip through their 4th gears.

StraightOuttaCanadaEh · 11-19-2018, 01:53 AM

Quote:

Originally Posted by Ski.mask

Hmm yeah that what i thought too, does anyone do gears for these or does it have to be a dogbox

I think someone was developing them and there was maybe a group buy? Expensive

86MLR · 11-19-2018, 02:26 AM

There's a thread here somewhere, the box is 250nm rated.

Found it...AZ6

Joveen · 11-20-2018, 06:20 AM

Quote:

Originally Posted by StraightOuttaCanadaEh

I think someone was developing them and there was maybe a group buy? Expensive

Jacks transmission has gears but its expensive. Might as well do a trans swap with 350z trans.

Sent from my SM-N960U using Tapatalk

tyler_win_photo · 11-20-2018, 11:10 AM

Quote:

Originally Posted by Joveen

Jacks transmission has gears but its expensive. Might as well do a trans swap with 350z trans.

Sent from my SM-N960U using Tapatalk

CD009 takes a fair bit of modification of the transmission tunnel if you do end up going that route.

x808drifter · 11-20-2018, 03:41 PM

Powerglide

:endthread

Little Mt. Fuji · 12-05-2018, 10:29 AM

i believe verus engineering has some gearsets in testing but they arent ready yet.
https://www.ft86club.com/forums/showthread.php?t=121071

jacks transmission has synchro upgrades for around 2k as well as a full 1-6 upgrade for 8k

cd009 is a pain to fit in the tunnel as well as the starter location is a problem i believe.

dogbox is not practical in street driving (but ofcourse you can do it)

Tcoat · 12-05-2018, 10:52 AM

Quote:

Originally Posted by x808drifter

Powerglide

:endthread

I never had any issues with any of my Powerglides. Both the gears always worked flawlessly.

Joveen · 12-05-2018, 12:10 PM

Quote:

Originally Posted by Little Mt. Fuji

i believe verus engineering has some gearsets in testing but they arent ready yet.
https://www.ft86club.com/forums/showthread.php?t=121071

jacks transmission has synchro upgrades for around 2k as well as a full 1-6 upgrade for 8k

cd009 is a pain to fit in the tunnel as well as the starter location is a problem i believe.

dogbox is not practical in street driving (but ofcourse you can do it)

Upgraded synchro is better than CD009?

Sent from my SM-N960U using Tapatalk

olsonpg · 12-05-2018, 12:55 PM

I grenaded my 3rd gear with only 310 wtq.

I was also driving like the savage I am.

So below 350 isn't gospel.

11-18-2018, 06:17 PM	#1
Ski.mask Member Join Date: Oct 2018 Drives: Hks supercharged rocket bunny 86 Location: Auckland new Zealand Posts: 16 Thanks: 10 Thanked 2 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Stock Gearbox max power Hey guys and girls im currently building a forged fa20 just wanted to know more about these gearboxes what sort of torque can these gearboxes handle for street and track use has anyone had any experiences with them. Im probably gonna have 400 to 450whp

11-18-2018, 07:10 PM	#2
StraightOuttaCanadaEh Wes Join Date: Feb 2017 Drives: Artisan Spirits '17 86 Location: Toronto Posts: 2,794 Thanks: 1,165 Thanked 1,674 Times in 994 Posts Mentioned: 21 Post(s) Tagged: 0 Thread(s)	I know the auto gearbox supposedly can handle 450 whp as I was told by a guy who was building his engine and he had an auto. I think the common consensus is that anything above 350 you're on thin ice with a manual __________________ Instagram: @gt86ws

12-05-2018, 12:55 PM	#14
olsonpg Senior Member Join Date: Jun 2015 Drives: BRZ. R34 GT-T Location: Calgary Posts: 762 Thanks: 737 Thanked 613 Times in 302 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	I grenaded my 3rd gear with only 310 wtq. I was also driving like the savage I am. So below 350 isn't gospel. __________________ / SARD / ENKEI / GREDDY / RACESENG / CUSCO / PERRIN / KW / POWERED BY MAX / SPARCO / STOPTECH / BREMBO / ROCKET BUNNY / FULL-RACE twin scroll / OS GIKEN / WHITELINE

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11-18-2018, 08:20 PM	#4
Trueweltall Senior Member Join Date: Feb 2016 Drives: 2016 Subaru BRZ Location: Florida Posts: 394 Thanks: 91 Thanked 195 Times in 115 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	It's not the horsepower that destroys the manual gear box, it's the amount of torque, with 350ft/lbs being the limit IIRC. Stock clutch is good for around 210-220 ft/lbs.

11-20-2018, 03:41 PM	#10
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12-05-2018, 10:29 AM	#11
Little Mt. Fuji Member Join Date: Jun 2018 Drives: 2013 Ultramarine Scion FR-S Location: New Jersey Posts: 50 Thanks: 13 Thanked 26 Times in 19 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	i believe verus engineering has some gearsets in testing but they arent ready yet. https://www.ft86club.com/forums/showthread.php?t=121071 jacks transmission has synchro upgrades for around 2k as well as a full 1-6 upgrade for 8k cd009 is a pain to fit in the tunnel as well as the starter location is a problem i believe. dogbox is not practical in street driving (but ofcourse you can do it)

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