15a 21a 13G?

Jeff20B · 10-11-2009, 09:18 PM

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 · 10-11-2009, 10:25 PM

100 percent improvement! take that federal regulations!

Jeff20B · 10-12-2009, 02:03 PM

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 · 10-12-2009, 09:48 PM

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

Jeff20B · 10-25-2009, 01:17 PM

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 · 12-17-2009, 11:35 PM

Quote:

Originally Posted by j_tso

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.

12arotary · 02-19-2010, 08:13 PM

Where did you find that pic?

Madaz · 02-20-2010, 03:23 AM

Quote:

Originally Posted by 12arotary

Where did you find that pic?

I took that pic

12arotary · 02-20-2010, 11:57 AM

Quote:

Originally Posted by Madaz

I took that pic

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

Madaz · 02-20-2010, 05:33 PM

Quote:

Originally Posted by 12arotary

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

12arotary · 02-20-2010, 06:37 PM

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

Madaz · 02-20-2010, 07:21 PM

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

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

12arotary · 03-08-2010, 12:10 AM

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 · 04-14-2010, 05:42 AM

Quote:

Originally Posted by 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

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.

10-11-2009, 10:25 PM	#17
Whizbang Respecognize! Join Date: Jul 2008 Location: Δx = ħ/2Δp iTrader: (5) Posts: 3,190 Rep Power: 20	100 percent improvement! take that federal regulations! __________________ For current updates and event coverage check out Follow on Twitter! @WhizbangRally Whizbang Rally's Webpage \| Facebook

10-12-2009, 09:48 PM	#19
12arotary tumor-syphilis-itis-osis Join Date: Sep 2008 iTrader: (0) Posts: 191 Rep Power: 17	^^^I think stock is rated at 15 city 21 highway __________________ 82 300d 82 Gsl 84 b2200 Diesel 88 gxl

02-19-2010, 08:13 PM	#22
12arotary tumor-syphilis-itis-osis Join Date: Sep 2008 iTrader: (0) Posts: 191 Rep Power: 17	Where did you find that pic? __________________ 82 300d 82 Gsl 84 b2200 Diesel 88 gxl

02-20-2010, 06:37 PM	#26
12arotary tumor-syphilis-itis-osis Join Date: Sep 2008 iTrader: (0) Posts: 191 Rep Power: 17	video is marked private but those pictures are great! is that a running engine then? very badass! __________________ 82 300d 82 Gsl 84 b2200 Diesel 88 gxl

03-08-2010, 12:10 AM	#28
12arotary tumor-syphilis-itis-osis Join Date: Sep 2008 iTrader: (0) Posts: 191 Rep Power: 17	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 __________________ 82 300d 82 Gsl 84 b2200 Diesel 88 gxl

10-11-2009, 09:18 PM	#16
Jeff20B Rotary Fanatic Join Date: Mar 2008 iTrader: (1) Posts: 215 Rep Power: 17	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.

10-12-2009, 02:03 PM	#18
Jeff20B Rotary Fanatic Join Date: Mar 2008 iTrader: (1) Posts: 215 Rep Power: 17	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.

10-25-2009, 01:17 PM	#20
Jeff20B Rotary Fanatic Join Date: Mar 2008 iTrader: (1) Posts: 215 Rep Power: 17	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.

02-20-2010, 07:21 PM	#27
Madaz Rotary Fan in Training Join Date: Jan 2009 Location: Burleigh Heads QLD Australia iTrader: (0) Posts: 56 Rep Power: 16	The 13A is to the 16X, the same as the 10A is to the 13B. http://www.youtube.com/watch?v=7TXBCQ4jFlE