TeamCapri
Tech, Repairs, Upgrades => Capri N/A 89-94 => Topic started by: Arizona Desert Dog on October 27, 2008, 07:34:00 AM
-
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.
-
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?
-
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
-
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:
-
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.
-
You can use clutch pieces from pretty much any g-series car as long as you use the throwout bearing from YOUR car. My dad just put a miata clutch and flywheel into his Protege (BP/g25mr)
-
Hey Guys! Since you're talking gears, I'd like to find out more on the 626 arrangement if you can steer me. Also is there a higher gear set available for the diff? I'm trying to lower my rpm at higher speeds. Gus
-
323performance has the specifics and a writeup on the 5th gear swap. I dont know about changing out the final drives on the differential, I think that requires changing out one of the main shafts in the transmission.
The 5th gearswap will reduce your RPMs 500 below stock.
http://www.mazda323performance.com/forum/viewtopic.php?t=12870 (http://www.mazda323performance.com/forum/viewtopic.php?t=12870)
-
Hey Rocket! Thanks for the lead. Not only does that drop the final ratio but he installs a limited slip diff. Really cool! Again thanks. Gus
-
The final drive ratio remains the same. The 5th gear ratio changes.
-
Hey Rocket! Thats the way I understood it. As you probably know ,I've posted on the 323 forum and am trying to get further answers. The guy had that tranny built has replied and something doesn't sound correct ,so I'm waiting for further comments and info. Again thanks. Gus
-
what are you trying to go for? just lower highway RPM? or top speed?
-
Hey Rocket! I'm trying to lower my rpm at speed. I'm getting a car ready to run closed hiways runs (silver states). These are run in Nevada and a couple other states also. These are run over a closed hiway and over a stretch of sometimes a hundred miles. I want to eventually run in a class of 140mph. I'm trying to avoid having to run 6500+ rpm over that stretch continuously and beating the hell out of the engine. Gus.
-
Gus-
You're going to run in the Silver State Challenge??? COOL!!
-
I've run 135mph on a stock transmission and tire size. 140mph is easily possible. Make sure you have clean oil and your cooling system is in check, maybe upgrade your intercooler. I think you'll be fine.
I think the capri tops out at just below 150 with a 7200rpm rev limiter. I dont know if the capri could make it there.
-
Hey guys! Yeah I'm gonna get a car ready to do silver states and-or the pony express. I want to eventually run in the 140-150mph class. I've been the navigator numerous times with a friend in his Viper and Corvettes, never a driver. I'm having a 6point bar installed soon with the intent to expand to a 10point cage when wanted. And have numerous engine mods coming on. Anyway one of the things I'm searching to do is lowering my RPM. I just don't want to be buzzing at 6500-7500RPM for a hundred miles. Gus.
-
You might need an extra fuel cell...these little engines GUZZLE fuel at extended RPM operation. Not sure if the oem fuel tank will cut it if you're going for 100miles