 2-rotary Mazda engine swap, smartasses need not apply |
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| bd1308 |
 Feb 9 2006, 09:49 PM
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#1
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Sir Post-a-lot  Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501  |
I migth have the opportinity to get a free rotary engine (1.3L) 2-rotor motor. Apex seals are good from what I hear, which is good.
There is exactly one member here that has done this, could you pm me or something....? b |
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Replies(20 - 39)
| Aaron Cox |
Feb 9 2006, 10:46 PM
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#21
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
see if alpha can make you a set of titanium rotors (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)
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| J P Stein |
Feb 9 2006, 10:46 PM
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#22
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
Sorry, dood. Smartasses here are a fact of life. A sure fire way to attract them to your thread is to ask them to stay away....another fact of life, btw.
Just my smartassed .02 |
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| bd1308 |
Feb 9 2006, 10:47 PM
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#23
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
yeah (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)
and maybe a titanium apex seal too. b |
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| Rotary'14 |
Feb 9 2006, 10:52 PM
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#24
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Senior Member Group: Members Posts: 753 Joined: 24-April 05 From: Los Angeles Member No.: 3,977 |
I checked my PMss,, and regarding mileage. I drove my converted car as a daily driver for 3 years in sucky Los Angeles traffic. Straight down the 110 from dodger stadium to Honda in Torrance. I drove in rush hour and the few times I kept my foot out of it I got combined mileage of 25 mpg. My set up at the time was a 13B streetport (= to a cam and PP) guestimated at 225 HP. I had a Holly projection 2D system. It ran sorta crappy,,,,
I used the Kennedy adapter plate,, it's an easy and proven system.
(IMG:http://www.914world.com/bbs2/html/emoticons/agree.gif) My front end looked crappy, anc I've tried different radiator configs,, and believe it or not I got by using a diesel rabit radiator. Air flow is the most important thing with a rotary install. The VW fan and shroud was up to the task of keeping my car cool for extended idles in traffic. And a descent flow of air past your radiator at speeds is a must. Which mazda is your engine from? -Rob |
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| bd1308 |
Feb 9 2006, 11:04 PM
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#25
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
if you're askin me, its from some 92 RX-7 or something. I looked and saw that it had a AFM FI system....
I saw the car today...and besides from some oil leak thing, it runs good...this is a very far LONGSHOT for me, but i was just wonderin if it was done b4 and it has. 25MPG isnt bad for the pep that you'd expect from that engine. gets better and better. b |
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| messix |
Feb 9 2006, 11:19 PM
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#26
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AKA "CLUTCH KILLER"! Group: Members Posts: 6,995 Joined: 14-April 05 From: between shit kickers and pinky lifters/ puget sound wa.north of Seattle south of Canada Member No.: 3,931 Region Association: Pacific Northwest |
it seems that for the power and rpm available the fuel economy is not bad. a 911 six would be in that range?
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| reverie |
Feb 9 2006, 11:19 PM
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#27
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Senior Member Group: Members Posts: 783 Joined: 14-March 03 Member No.: 427 Region Association: None |
As far as I know, there's no such thing as a '92 RX-7..
The FC model ended in '91, and the FD model started in '93. |
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| bd1308 |
Feb 9 2006, 11:21 PM
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#28
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
i dunno what year it was.....
it was yellow with a rattle-can primer over it... front end bumper gone.. had a small radiator though... b |
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| Rotary'14 |
Feb 9 2006, 11:31 PM
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#29
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Senior Member Group: Members Posts: 753 Joined: 24-April 05 From: Los Angeles Member No.: 3,977 |
You should look into building a megasquirt. The rotary guys on that forum seem to be adding more and more features for the rotary engine. I have one I plan on using,,,, The stock system is overly complicated with emissions related stuff. MS can even interface with the stock ignition system so be sure to get the coils and crank angle sensor.
When I got 25 mpg, I never revved higher than 3500. (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif) I mounted my radiator up front, slanted against the gas tank bulk head. The heated air exited out of the bottom of the car past the brake m/c. I channeled air from a scoop in the front below the bumper into the front compartment and controlled how the air exited. I made sure to channel it through the radiator. I had the upper 1/2 of my front trunk usable. My spare was in the back. I've had a recent revelation and am wondering if we can cram a small (mini cooper) sized radiator where the /6 has it's oil tank. I would vent it through to the engine bay and have some fans to help. Then I would mirror it on the side the battery is on. (It would be best to relocate the battery for this mod.) Then I would connect the two radiators with a connecting pipe. I wonder how much air flow will this get? Is the areas that I am thinking of making swiss cheese structural? any comments on a crazy idea? My header pipes were custom and routed well clear of the clutch cable and pulley. I never melted my pulley, even on long drives up to San Francisco with occasional blasts up to 120 and constant cruising at 80. Engine mount is pretty easy, exhaust is medium in difficulty to get right (in regards to exhaust tuning) -Rob |
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| rhodyguy |
Feb 10 2006, 12:08 AM
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#30
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,080 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
don't worry rog. we'll always wait for you to catch up.
k |
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| soloracer |
Feb 10 2006, 01:24 AM
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#31
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Senior Member Group: Members Posts: 793 Joined: 7-April 03 From: Calgary Member No.: 538 |
Welcome aboard! I think that getting rid of heat in the exhaust and cooling system will be your biggest challenge. Rotary engines don't handle being overheated so the cooling system should be of primary concern. I went with the Renegade Hybrids set up on my 3 rotor project because it's proven and I don't mind having a radiator in the front of the car. Now if you want some serious N/A power modify that little 13b like this one:
Attached image(s) 
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| Tom Perso |
Feb 10 2006, 05:41 AM
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#32
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Crazy from the Cold... Group: Members Posts: 647 Joined: 8-August 03 From: Kalamazoo, MI Member No.: 1,003 |
Awww... Look at the cute little motor... (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)
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| Dead Air |
Feb 10 2006, 08:31 AM
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#33
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Senior Member Group: Members Posts: 1,268 Joined: 9-May 04 From: Buffalo, NY Member No.: 2,042 |
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| Rotary'14 |
Feb 10 2006, 09:20 AM
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#34
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Senior Member Group: Members Posts: 753 Joined: 24-April 05 From: Los Angeles Member No.: 3,977 |
or,, I like 914/2 1.3 or something like that (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) |
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| reverie |
Feb 10 2006, 01:57 PM
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#35
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Senior Member Group: Members Posts: 783 Joined: 14-March 03 Member No.: 427 Region Association: None |
Big ports? (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) _ Kev.. yeah, you guys are way cool. (IMG:http://www.914world.com/bbs2/html/emoticons/cool.gif) |
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| lapuwali |
Feb 10 2006, 02:57 PM
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#36
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743  |
I owned two rotary cars: an '85 RX-7 GSL-SE (13B) and an '87 RX-7 Turbo. Both got about 18mpg in daily driving, with as much as 24mpg on gentle highway drives. Flogged on a good road, mileage would often drop to as little as 10mpg. This would probably improve a bit on a 914, since you're dragging around about 300-400lbs less weight.
The OEM control systems are fiendishly complex, with a zillion vacuum hoses to leak, and solenoid valves to break. You'd want to do a custom injection setup. Weber manifolds are available, and you could bolt on a TWM throttle body. I know there are manifolds for DCOEs and big Holley carbs, but I'd use an IDF manifold if one was available, with an IDF-style throttle body. The DCOE manifolds wrap around the top of the engine, and, like the OEM injection stuff, make it difficult to impossible to reach the OEM oil injection stuff, which often leaks. Unless you want to pre-mix all your gas, you really want to keep the oil injection. The earlier engines used a distributor, or a fake distributor that triggered multiple coils. These would be easier to adapt to DIY EFI than the later systems. They generate enormous heat and sky-high exhaust temps, so a rear-mounted radiator would be unlikely to work. You'd need as much radiator area as a V8. They also sound NASTY (not in a good way) w/o very good muffling, and require LOTS of muffler volume to kill the noise w/o also killing the power. However, because of all of that, they do turbocharge very well. The early factory Turbos had lots of lag, but the later variable inlet turbos were pretty good. The turbo kills the worst of the noise, so you can use a normal muffler after them. For their size and weight, they can be made to produce big power. Their torque characteristics would be a pretty good match for a 901, too. |
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| jhadler |
Feb 10 2006, 03:35 PM
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#37
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Long term tinkerer... Group: Members Posts: 1,879 Joined: 7-April 03 From: Lyons, CO Member No.: 529 |
Nice idea...
Some gotcha's though. 1) Rotary's run hot. I doubt an engine bay radiator would work very well. 2) They need good intake and exhaust to make power. A stock 13b -can- put out from than 220hp (seen the dyno sheets to prove it), but it needs the good stuff. I like rotaries though. Only three moving parts, no valves, no springs. Nice and simple. Will keep making power as long as you can get air in, and exhaust out. As for a teener beating up on an RX-7? Well... The RX7 is hauling around a good deal more weight (like 500 lbs or more), has poor low end torque, and is stuck with a live rear axel. Now... the cool thing is you can make power all the way up to 10,000 rpm. So long as your transmission can take it... Be neat to see though. Put a blower on it and now we're talkin'! (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) -Josh2 |
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| Gary# |
Feb 10 2006, 03:50 PM
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#38
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Member Group: Members Posts: 217 Joined: 15-May 05 From: Buena Park, Ca. Member No.: 4,078 |
Here's a website that offers a kit. Have fun.
http://home.earthlink.net/~reddawgbytes/re...reats/id19.html |
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| morph |
Feb 10 2006, 07:44 PM
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#39
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quality parts builder Group: Members Posts: 1,828 Joined: 25-November 03 From: oregon coast Member No.: 1,389 Region Association: Pacific Northwest |
Guy in yakima wash has one. Cooling was his biggest enemy.sounded cool,and on the open hwy my car couldnt hang with my 1.7.In town he couldnt even keep up.
just my .02 i have drove the car,and had him drive me in it.wasnt really impressed.but to each his own. James |
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| TimT |
Feb 10 2006, 07:56 PM
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#40
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retired Group: Members Posts: 4,033 Joined: 18-February 03 From: Wantagh, NY Member No.: 313 |
I mentioned 210hp @ 10500 rpm before, We dont know didly about rotaries.. Someone brought there car to the shop, and asked us to get his car running (he bought Haltech from someone else and could not get his own car running) we have no idea what, if any mods were made to the engine... from the dyno plots we have it looks like at 16000rpm we could have 300 hp (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) tuning a rotaryy has been a learning experience.. we now have a car with a worked and ported rotary he asked us to intall a HUGE turbo.. should be interesting |
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