Tech, Repairs, Upgrades > Capri N/A 89-94

XR2 Clutch/Trans

(1/4) > >>

Arizona Desert Dog:
Is the larger clutch for an XR2 able to fit using a n/a transmission and turbo flywheel, or do I need a turbo transmission as well?  I have a line on a used turbo trans, so that is not a problem.  I was just wondering if an aftermarked turbo flywheel and clutch would do the trick to have the larger clutch.  Also, is there any difference in the release arm, at the pressure plate end, between the turbo and n/a since the turbo uses a cable and the n/a is hydraulic?  Thanks for any help.

Arizona Desert Dog:
Nevermind, it would appear from checking application data that the input shaft diameter and spline count are different so I would need the turbo trans.  Anyone know if the gearing or ring and pinion ratios are radically different?

Gus Kelley:
Hey ADD! With the trans change you'll also need the axles and brakes. There is also a slight change in gear ratios. The N/A redlines about 125mph and the turbo about 140mph. Good Luck!  Gus

stinkweed:
Hi everyone. I was wondering about the same idea for my 91 n/a. I'm trying to decide whether to change over to the "G" series XR2 tranny with the longer gear ratio's, bigger axles, and install an XR2 9lb aluminum flywheel or keep the "F" series n/a short ratio tranny and upgrade it. The 1.6L Miata's have the same size clutch as the n/a Capri (7 7/8") but have a 22 spline disc. The flywheels also show to have the same 112 ring-gear teeth as both Capri's. Does anyone know the differences in all the flywheels or clutches. Pics anyone? My idea was to use the original "F" series tranny with a performance Miata clutch and a n/a Capri 20 spline disc (7 7/8") bolted to a Miata performance 7lb aluminum flywheel and change the 5th gear ratio to an escort .73 gear. This would free up rotational HP, allow quicker revving shifts through a short ratio tranny, lower rpms at hwy speeds, and theoretically create a higher top speed assuming the n/a engine has enough HP to pull the taller O/D gear. My plan is to save weight and keep things light and small since I don't have a turbo engine. What do you guys think? Thanks for any info.  :cool:

Rocketman:
The Miata uses a flat-plane flywheel instead of raised ring around the outside.

I know the Miata clutch system can work in an XR2, but I dont remember if you have to use the XR2 throwout bearing. That may be problematic on the N/A.

The N/A tranny is an F series. Escorts use a G series tranny, the gears are physically different. Escort tranny bits will swap into an XR2 tranny.

AFAIK the XR2 tranny is no longer than the F series. (ratio wise. I think its still touted as a "short ratio" tranny in the old ads). At 70mph I'm still cranking 3500RPM. There is a 'upgrade' using mazda 626 gears that will drop that to about 3000 RPM at the same speed. I think there is even an Escort 5th gearset that will drop it even more but it makes the 4-5 shift quite a jump.

I think there is an aluminum flywheel available from Fidanza somewhere out there that will work with the stock B6 clutch. I don't recall exactly which car its from.

Navigation

[0] Message Index

[#] Next page