WTB rx-7 rear end set up for miata! (feeler thread)
 

whats running price on a rx-7 set up? basically a complete rear end swap in the 91 miatas. hell whats a beat to death running rx-7 run about? and another note... what year has the best rear end? (if any are better)

im a mazda noob so please no laughing at the challenged guy lol:nerd:

-tyler

(that one kid with the ugly slammed matte green mx-5... YeAh):facepalm:

if possible get a turbo 2 rear, tranny and axles.. i've been told by a few people that there really strong and kinda hard to find

well im trying to deside if i want to go rx-7 or ford 8.8 rear end... the cars not getting a rotory its getting a turbo 2.3 4 banger from a ford. so im just trying to see which would be stronger and or cheaper. the 8.8 if solid axle narrowed will be about 600-800 plus a shit ton of fab work. and the irs 8.8 is 600 for the half shafts... :/ yeah gay .
whats the turbo 2 rear end and axles and everything run roughly?
-tyler

ive seen them on rx7 club from 150 to 300.. there not too expensive and there pretty strong

ok cool. and do u know what all i would need? just the center section or would i need axles and mix match all kinds of crap? thanks a lot bro. repp'ed

as far as that idk.. i would get the t2 axles and the rear brake asslembly too just imo.. there should be a write up or info about it on rx7club.com.. and thanks bro..repp back

If you run the T2 diff, you'll need to swap over the front section of your miata diff so that it will bolt up to the PPF. However, I think you'll need a 1.8L housing to accommodate the T2, as it's a 7 or 8 inch ring gear vs. the 6inch ring gear in the 1.6L diff.

Found this online:

"the TII diff is a big undertaking, however....the non-turbo LSD is not.

straight from my FAQ:

84-91 RX7 Non-Turbo Clutch Type LSDs can also fit into the 1.8 gear ring if you're looking for a good LSD as well. Clutch-types have proven superior in Drag and Road course situations as the lock under driveshaft torque, whereas a Torsen should prove better in an autox situation as it locks only when one wheel loses torque...so in the middle of corners.

The 84-85 GSL is a 3.909.

The 84-85 GSL-SE is 4.08.

You can do this conversion by two ways:

1. 1.8 open converted to RX7 LSD:

Parts:
94-05 1.8 Miata open assembly
84-91 NON-TURBO Rx7 clutch-type lsd (89-91 is a viscous, don't bother)
94-95 Miata stub shafts or 86-88 RX7 stub shafts and 94-95 Miata half-shafts
or 96-05 Miata axles (no stubs needed)
94-05 Miata driveshaft
Miata Ring and Pinion

Procedure:
Open the 1.8 miata & pull the open diff. Bolt the miata ring gear to the RX7 LSD. Drop it in, set the backlash and reassemble the housing. Swap/install as normal.

2. 86-88 RX7 assembly conversion:

Parts:
86-88 RX7 NON-TURBO differential assembly
94-95 Miata stub shafts or RX7 stub shafts and 94-95 Miata half-shafts
or 96-05 Miata axles (no stubs needed)
94-05 Miata driveshaft
Miata Ring and Pinion
Miata Pinion housing (pumpkin) (find at RX7 performance shops)
Miata Diff. Bushings

Procedure:
Open the RX7 assembly. Bolt the miata ring gear to the RX7 LSD. Swap the LSD to the miata pinion housing. Set the backlash and assemble the miata pinion housing to the RX7 carrier. Drill out the RX7 diff bushings and push in miata specific bushings. Install as normal.

*note: The 85-85 LSD will fit, however, the housing is not compatible....unless you want to convert to a solid rear axle
**note: The 89-91 Non-Turbo LSD will also fit, but shy away from these are they are Viscous LSD units and aren't worth the trouble.
***note: Replace the (2) seals on the Diff before reinstallation (MA02-27-238A $5.95)"

You can get by with just the axles and pumpkin if you don't mind welding a bit. Keeping the front nose from a miata isn't a bad idea if you want to use the PPF, but there is nothing to bolt it to off the T5.

The 4.10 ratio gets real old real quick though.

I'll try and call this week Tyler, spent almost all my time getting another car ready for last weekends race.

i would highly recoment just using a ford 8.8. if your handy enough with the welder to do a full rx7 diff swap you can just as easily fab up mounts for the 8.8 and then u get a much cheaper and wider selection of lsd diffs and ring and piion gears. + if you get the aluminum one its gonna be lighter then the rx7 diff too.

update. 1.6 tranny blew up backing into a car spot and i now have 5th neutral and reverse. good stuff right? so idk whats going on with this thing now but i think the white fox might be going back to top priority and miata getting a tubular chassis and cage and a race seat and a four link and a big ass turbo on hopefully a ford 2.3T motor. but thats all a while from now.
anyways how much do the rx-7 swaps run about price wise ? and thanks everyone for the help.
-tye