15a 21a 13G?

[12arotary]

Anyone know what they came it, if they came in anything, how I could track one down or were they just prototypes, information on these are soo scarce

[Jeff20B]

The 13G is the only one you MIGHT find. The others were prototypes. Too bad because I really like the 15A. I hope the 16X will live up to the hype so I can put one in my REPU. A 15A was going to go in until I learned how unobtanium it is.

[j_tso]

Racing Beat sells a boosted 13G for $48k. All were only used in racing.

The only other very rare RE was the 13A sold only in the front wheel drive R130 Luce. It had taller rotors that were the same width as the 12A. I think the new 16X is very similar in size.

[12arotary]

I've never even heard of the 13a, but I was hoping the 15a wasn't prototype

the info that I find out there is conflicting and very hard to come by only a few write ups every once and a while

[PercentSevenC]

There were also the 3804 and 3805, which were 3- and 4-rotor variants of the L8A respectively, and the 2002, which was two 10As linked together. And of course the 40A, Mazda's first rotary prototype. I understand there was also a 1-rotor version of the L8A, but I haven't found anything concrete on it.

[Whizbang]

real old 12a engines are interesting in their own right. Twin dizzy, 6mm apex seals.

then there are NSU engines

http://img.photobucket.com/albums/v230/Tsunami_Bomb/Old%20School%20Rotary/2b1bry2.jpg

[12arotary]

real old 12a engines are interesting in their own right. Twin dizzy, 6mm apex seals.

then there are NSU engines

http://img.photobucket.com/albums/v230/Tsunami_Bomb/Old%20School%20Rotary/2b1bry2.jpg

from what I have sitting on my shelf the 6mm apex seals were tanks but the housings were junk, mine are both missing at least 25% of the facing crome in large flakes- all the rotors and seals are perfect though

[12arotary]

where did you find that picture of the Nsu engine?

[j_tso]

Here are some scans from the RX-8 book by Jack Yamaguchi, I recommend anyone to pick it up or any of the RX-7 books.

They're in black&white so the scanner would work faster.

21A and 15A (http://homepage.mac.com/jolocho/REX01.jpg)

RE10X, (http://homepage.mac.com/jolocho/REX02.jpg) an improved version of the 10A intended for a light coupe

RE13X (http://homepage.mac.com/jolocho/REX01.jpg), a power electric assisted RE. Most interesting is the combi-port, a switchable intake from side to peripheral. I don't think it's been seen since the Cosmo that raced at the Marathon del la Route. A bit of the left is cut short, I didn't want to bend the spine too much.

[Whizbang]

i have no idea where i got that picture i have an extensive rotary media collection ha

[Jeff20B]

I just pulled the 13B from the REPU yesterday for some work and noticed how far forward the motor mounts are. Yep, looks like a 15A could nay should have gone in. It's a truck with a rotary! A 15A would have made a lot of sense back then before the age of EFI and turbos. 135 bhp at 5750 rpm and 196nm (145 lb-ft) at 3500 rpm for the 15A compared to the 74 13B's measly 110 hp at 6000rpm and 117 lb-ft at 3500 rpm. Which would you prefer if given the choice?

[Whizbang]

im guessing they were concerned about emissions or fuel economy?

[Jeff20B]

That's the thing. The 15A had a massive thermal reactor and could pass an emissions test, apparently.

Fuel economy? I used to get 5 miles per gallon in the truck.

[Whizbang]

hmm.

[12arotary]

That's the thing. The 15A had a massive thermal reactor and could pass an emissions test, apparently.

Fuel economy? I used to get 5 miles per gallon in the truck.


something wrong if you get 5 in a repu haha
but i'd take the 15a any day!

[Jeff20B]

Yeah my tranny was dying. It was a '79 5 speed that had far too many miles on it. 1st gear eventually stopped working and it would feel noticeably laggier each time I'd floor it. Like the bearings were fried and they'd heat up when running full power through them. I eventually located a ribcase tranny and it's been fine since. I suspect my mileage has improved to about 10 mpg.

[Whizbang]

100 percent improvement! take that federal regulations!

[Jeff20B]

lol

The above mileage was calculated while it still had the awful exhaust and a stock Hitachi carb jetted to run too rich all the time for the thermal reactor to get a rich enough mixture to burn completely and all that. Since then I've gone to a collected RB header and a single 2" free flow system with a Camden. The exhaust is far too small for high RPM use (gonna redo it in 2.5") but the Camden can be driven in such a way that it improves mileage over the stock carb.

So if I had to guess what its mileage will be after the free flowing exhaust is installed, and the new engine, with the Camden, I'd have to say probably in the neighborhood of 15 mpg. Remember it's a heavy vehicle with a somewhat low geared rear end.

I did recently swap over to a light steel flywheel though, which acts like less unsprung weight, for a minor improvement is gas mileage. :)

[12arotary]

^^^I think stock is rated at 15 city 21 highway

[Jeff20B]

Heh yeah it may be rated for that but I doubt it gets that much in real life. A Renesis would be a serious contender in the REPU actually. They're somewhat plentiful now and would only need a few mods to make it fit the REPU bay.

[Madaz]

The only other very rare RE was the 13A sold only in the front wheel drive R130 Luce. It had taller rotors that were the same width as the 12A. I think the new 16X is very similar in size.

Yes your correct about the 13A sharing the same rotor diameter as the 16X however its width is the same as the 10A at 60mm.

http://img29.imageshack.us/img29/9438/pc180002.jpg

[12arotary]

Where did you find that pic?

[Madaz]

Where did you find that pic?

I took that pic :)

[12arotary]

I took that pic :)

whoa! you want to take a picture of the whole housing?

[Madaz]

whoa! you want to take a picture of the whole housing?

Sure thing

Here are some pics, and a video to hear the sound. :)

http://img695.imageshack.us/img695/4773/pb150107.jpg


http://img39.imageshack.us/img39/3021/pb150109.jpg

http://img39.imageshack.us/img39/6043/pb150110.jpg

http://img42.imageshack.us/img42/7168/p2210001o.jpg

http://img692.imageshack.us/img692/4286/copyof13adrivetrain.jpg

http://img189.imageshack.us/img189/8445/pc310094.jpg


http://www.youtube.com/watch?v=7TXBCQ4jFlE

[12arotary]

video is marked private but those pictures are great! is that a running engine then? very badass!

[Madaz]

The 13A is to the 16X, the same as the 10A is to the 13B.

http://www.youtube.com/watch?v=7TXBCQ4jFlE

[12arotary]

where exactly did you come across a 13a anyways, I search everywhere and the best I've ever found is a blown 10a and a lot of blown pre rx7 12a's and 13b's

[Madaz]

where exactly did you come across a 13a anyways, I search everywhere and the best I've ever found is a blown 10a and a lot of blown pre rx7 12a's and 13b's

Back in 1991 I gifted the piston engine from my 1970 Mazda Luce Estate engine to well known local rotary engine builder Glenn Munro of Rotary Power Limited in Auckland New Zealand.

He "re-payed" the favour in 2008 by supplying me a 13A and trans at mates rates for my Luce RX87.

Less than a thousand 13As were produced compared to a couple of hundred thousand 10As so yes 13A engines are very very hard if not impossible to find.

The US only got the 10A in the R100 so 10A's are rare indeed in N.America

RX3 10A engines are still easy to find in Australia/NZ if you really want to get one. Cosmo and R100 10A's are getting harder now to find.

Have you searched Japan? 13A engines were exclusive to Japan only.