Jeff20B

iTrader: (13)

Oh man evil, that's a wicked pic! Thank you!!

Wow, it really does snake around, doesn't it! I also noticed the dipstick wouldn't be accurate if I moved the sump forward (or replaced it with a 13B sump). Hmm, well I've come across obstacles in this project before and have found workarounds. I'll just have to brain this for a while too.

By the way, does anyone know if the 20B flexplate is usable with a '76 automatic?

In a perfect world (heh, as if), I'd use the JC starter with the JC flexplate on my '76 torque convertor and auto tranny with all the power mods it needs to handle the 20B, and this project would be very cheap compared to some that I've read about. But then again, I won't be modifying all that much with the car, so it'll probably be comparatively cheaper.

RETed

Damnit, who the hell posts .bmp's for pics?!??!?
That guy should be shot!



-Ted

j9fd3s

iTrader: (3)

mazda has 2 ring gears, the 0866-11-702 and the N318-11-502A. the 0866 looks like it works from rx-2,3 onwards. the n318 is an 86 up turbo ring gear, it is bigger. i suspect that the jc uses the big one (n318) and your cosmo uses the little one.

mike

crispeed

Actually!
The 84/85 12A/13B front covers have the turbo oil return hole just below the OMP casted into them from factory. All you have to do is run a drill bit through it and a 1/2inch NPT. tap.
I believe these were the same front covers used in Japan on the 12A turbo's but since they never came here in a turbo version the factory never machined the hole for the return line. I've used these covers many times on 12A and 13B GSLSE turbo conversions.

crispeed
87 Rx-7 TII
9.204@150.47mph
2600lbs
un-tubbed

j9fd3s

iTrader: (3)

thanks! that's my next project- to stuff my t2 motor into one of my se's, and that was one of the little sticking points.

mike
20b fc
13bt gsl-se
12a fd????

Jeff20B

iTrader: (13)

j9fd3s, that sounds about right. I'm curious to know if the JC flexplate will still fit inside my bellhousing and bolt to my torque converter. I'll see if I can fit a tape measure between the flex plate and torque converter through the upper and lower inspection plate holes on my tranny. This ought to give me an idea of the diameter, and how much space I have to work with.

crispeed, I've got an '83 front cover with that blank oil line casting you mentioned. I was most likely going to use it on the 20B. By the way, they are the same covers used on the 12A turbo engines, starting in '83.

peejay

I doubt it'll fit, Jeff, but what is news to me is the oil return info. I thought that was only for GSL-SE front covers! Now I'm going to have to check out the cover on the '85... and the one off the '83 engine for that matter!

j9fd3s

iTrader: (3)

and i'll bust out the micro fische and look it up!

mike
parts bitch 8/97-3/02

peejay

I know the GSL-SE definitely used a different front cover from the 12A because the OMP is all different.

Went down to the basement of doom and checked out my '83 front cover - no boss of any type below the OMP. (Definitely an '83 - it had the lightweight rotors and the "30" flywheel, and the wiring harness all went to the left side of the engine)

Jeff20B

iTrader: (13)

I think you're right peejay about the amount of space between the flex plate and torque convertor (I forgot the flex plate is a little concave and wraps around the tc a bit, rather the JC one does at least). Maybe I can measure it a different way without having to remove the engine (or tranny)?

Hmm, maybe your '83 was one of the last to use the older style front covers. All I know is my 12A is probably an '83, but could have been an '84 or '85. I'll need to dig out my flywheel to be sure.

peejay

'83 flywheel is the same as '84-85 In fact I thought it was an '84-85 engine because I was under the impression that only '84-85 had 6 solenoids on the rack. Then I found out that '84-85 wiring harnesses are far different from '83, and the engine definitely did not have the '84-85 style So therefore it's '83.

Jeff20B

iTrader: (13)

Just an update on my CD Cosmo 20B project. I wasn't sure if I should start a new thread for this, but anyway I've begun work on an ignition system for it. I've also decided to keep using the stock clutch fan if at all possible because, like the HITman says, it pulls tons of air with only a few HP drop in performance. Who will notice it if you've got hundreds to spare? Especially on an automatic! I've just got to figure out if I can get away with shortening the waterpump pulley-to-clutch adaptor, or use the really short one from my REPU. The only prob I can forsee is the use of a power steering belt, and its main drive pulley interefering with the fan adaptor. I've got a 16 inch electric fan on my REPU, which is smaller than the clutch fan on the Cosmo. Man, that Cosmo fan is huge!

Still no luck with the tranny or oil pan situation, but I expect that to change soon.