mazda miata gear box 13b tranny

Nopis1O · 04-10-2008, 03:06 PM

has anyone done a mazda miata gears in a 13b tranny. i heard you take the miata tail shaft and gear box and use the housing of the 13btranny. i know its possible but i just wanted to know if anyone in this form has done it. i am going na and just trying to pick up a little more acceleration in second gear for autocrosssing.

thanks

Nopis1O · 04-10-2008, 03:08 PM

pics of the build. performance gains? how it seems to hold up? i have talk to rx7girl on nopiston.com just wanted a couple more opoions. thanks guys

djmtsu · 04-10-2008, 05:09 PM

It has been done, and there is not real benefit. There is a considerable amount of work to be done (input shaft needs to be modified and resplined for instance).

Changing the differential (a GTUs 4.33 gear ratio) is a good idea, and easier.

Nopis1O · 04-10-2008, 10:15 PM

i just need a shorter 2nd gear for auto crossing. that sounds better because that wouldnt bump me into prepared so i might just try that.

04-10-2008, 03:06 PM	#1
Nopis1O Rotary Fanatic Join Date: Apr 2008 Location: Mid State Illinois iTrader: (0) Posts: 159 Rep Power: 17	mazda miata gear box 13b tranny has anyone done a mazda miata gears in a 13b tranny. i heard you take the miata tail shaft and gear box and use the housing of the 13btranny. i know its possible but i just wanted to know if anyone in this form has done it. i am going na and just trying to pick up a little more acceleration in second gear for autocrosssing. thanks __________________ 1988 Fc Vert. Super Stock 1990 Fc Hard top: Brideported 13b, weber carb, 350z wheels w/nitrogen, or 16in BBS meshies, Msd, Racaro Racing Seats, Custom Gauge cluster, custom Intake, Relocated Battery, 3inch header back borla exhaust system, Alpine stereo system, Wire tucked, S4 shift boot&knob, custom Strut bar, And soon to come a Full black w/ gold pearl paint job, powder coated break calipers, all black interior, bride headliner/door panels.

04-10-2008, 03:08 PM	#2
Nopis1O Rotary Fanatic Join Date: Apr 2008 Location: Mid State Illinois iTrader: (0) Posts: 159 Rep Power: 17	pics of the build. performance gains? how it seems to hold up? i have talk to rx7girl on nopiston.com just wanted a couple more opoions. thanks guys __________________ 1988 Fc Vert. Super Stock 1990 Fc Hard top: Brideported 13b, weber carb, 350z wheels w/nitrogen, or 16in BBS meshies, Msd, Racaro Racing Seats, Custom Gauge cluster, custom Intake, Relocated Battery, 3inch header back borla exhaust system, Alpine stereo system, Wire tucked, S4 shift boot&knob, custom Strut bar, And soon to come a Full black w/ gold pearl paint job, powder coated break calipers, all black interior, bride headliner/door panels.

04-10-2008, 05:09 PM	#3
djmtsu My minds tellin' me no... Join Date: Feb 2008 Location: Murfreesboro, TN iTrader: (10) Posts: 4,043 Rep Power: 21	It has been done, and there is not real benefit. There is a considerable amount of work to be done (input shaft needs to be modified and resplined for instance). Changing the differential (a GTUs 4.33 gear ratio) is a good idea, and easier. __________________ 1976 Mazda Cosmo RX-5 1976 Mazda Cosmo RX-5 2003 Toyota Tundra TRD 2015 Toyota 4Runner SR5

04-10-2008, 10:15 PM	#4
Nopis1O Rotary Fanatic Join Date: Apr 2008 Location: Mid State Illinois iTrader: (0) Posts: 159 Rep Power: 17	i just need a shorter 2nd gear for auto crossing. that sounds better because that wouldnt bump me into prepared so i might just try that. __________________ 1988 Fc Vert. Super Stock 1990 Fc Hard top: Brideported 13b, weber carb, 350z wheels w/nitrogen, or 16in BBS meshies, Msd, Racaro Racing Seats, Custom Gauge cluster, custom Intake, Relocated Battery, 3inch header back borla exhaust system, Alpine stereo system, Wire tucked, S4 shift boot&knob, custom Strut bar, And soon to come a Full black w/ gold pearl paint job, powder coated break calipers, all black interior, bride headliner/door panels.