2 engines in an 87 n/a
Thread Starter
Junior Member
Joined: May 2008
Posts: 21
Likes: 0
From: Seattle, Wa
2 engines in an 87 n/a
I've heard that you can put two engines bolted together into rexxes. If this is true, does anyone know what the performance of this would be. I have to admit the the prospect of this does intrigue me greatly. Also, if this can be done does anyone know if there are kits out there for this?
well rested,buffet o food
Joined: Dec 2006
Posts: 1,605
Likes: 1
From: NY
Yes there is. Here is a starting point.
http://www.kiwi-re.com/wwd_showroom_cat10_2.php
Only will cost you about 20,000 dollars or so, when all said and done with, including rebuild.
john ny
http://www.kiwi-re.com/wwd_showroom_cat10_2.php
Only will cost you about 20,000 dollars or so, when all said and done with, including rebuild.
john ny
Joined: Sep 2005
Posts: 25,581
Likes: 136
From: Smiths Falls.(near Ottawa!.Mapquest IT!)
Aaron Cake:Had one in the car that he used for Power.The other one,he had taken the passenger seat out to Transport the Engine!(he had a good pic of that somewhere!)
Now, seriously 20b 3 rotor.anything else will cost you a House worth of money.and for what?.a car that you use On weekends!
Now, seriously 20b 3 rotor.anything else will cost you a House worth of money.and for what?.a car that you use On weekends!
Joined: Feb 2001
Posts: 29,798
Likes: 128
From: London, Ontario, Canada
You can do anything with the appropriate amount of skill, motivation, money and equipment. Whether it is realistic to do such a thing is another question.
It has been done in the past. I've seen pictures years ago at such a setup. The front of the 2nd engine was connected to the rear of the eccentric of the 1st engine using a custom set of stationary gears with a keyed coupler. The shafts were machined to accept one another. It was a ridiculous setup and I honestly don't know why it was done. It makes far more sense to build a proper 4 rotor. Such an arrangement will not fit into a 2nd gen without major cutting.
So the short answer is just "no".
The long answer is that if you have an extra 50K lying around, you can get a 4 rotor kit from Precision Engineering which will allow you to build a 4 rotor engine. The kit itself costs about $6K, but of course the extra $44K is what's needed to make it useful.
It has been done in the past. I've seen pictures years ago at such a setup. The front of the 2nd engine was connected to the rear of the eccentric of the 1st engine using a custom set of stationary gears with a keyed coupler. The shafts were machined to accept one another. It was a ridiculous setup and I honestly don't know why it was done. It makes far more sense to build a proper 4 rotor. Such an arrangement will not fit into a 2nd gen without major cutting.
So the short answer is just "no".
The long answer is that if you have an extra 50K lying around, you can get a 4 rotor kit from Precision Engineering which will allow you to build a 4 rotor engine. The kit itself costs about $6K, but of course the extra $44K is what's needed to make it useful.
Haha, Aaron had to be the one to burst his bubble...lol
On a slightly different topic I have seen a Dalorean with two engine in it, I think a Honda V^ in the front and V8 in the back at a local Dalorean gathering. Couldn't find my pics but happened ascross this link to a Dalorean with a 20B in it. Ha!
http://www.eliseusa.com/rotary.htm
On a slightly different topic I have seen a Dalorean with two engine in it, I think a Honda V^ in the front and V8 in the back at a local Dalorean gathering. Couldn't find my pics but happened ascross this link to a Dalorean with a 20B in it. Ha!
http://www.eliseusa.com/rotary.htm
Trending Topics
Joined: Apr 2005
Posts: 3,785
Likes: 30
From: And the horse he rode in on...
I've heard that you can put two engines bolted together into rexxes. If this is true, does anyone know what the performance of this would be. I have to admit the the prospect of this does intrigue me greatly. Also, if this can be done does anyone know if there are kits out there for this?
http://members.tripod.com/~grannys/4rotor.html
Because the design removes what would have been the 2 middle counterweights, the two engines were indexed the same (#1 rotors for each fired at the same time). This puts the two middle eccentrics 180 degrees (in rotation) from one another, thus canceling the need for center counterweights to maintain balance.
For the type of racing that the engine was built for, eliminating as much rotating mass as possible is a much sought after goal. The effects on accelleration can be very surprising. By joining the two engines as I did (using only 1/2 the normally required flywheel and counterweight mass), the engine rev'ed much faster than a single engine by its self. Although the exhaust note might be more pleasant if the engines were phased 90 degrees from one another for an even firing order, the reduced mass and synchronized peak torque pulses make for less stress on the coupling, and the reduced rotational inertia over that of two separate engines far outweigh any performance advantages of the smoother sounding 90 degree firing order.
The Outlaw Dirt Cars were one of the few places that the 4 rotor car was allowed to run, so that's where we ran it. In the form shown here, output was around 550hp. Even at this low power level, the engine held it's own at times against the $25,000. aluminum blocked V-8s it ran against. Turbos were not allowed, so plain 'ol low octane pump gas was used.
For the type of racing that the engine was built for, eliminating as much rotating mass as possible is a much sought after goal. The effects on accelleration can be very surprising. By joining the two engines as I did (using only 1/2 the normally required flywheel and counterweight mass), the engine rev'ed much faster than a single engine by its self. Although the exhaust note might be more pleasant if the engines were phased 90 degrees from one another for an even firing order, the reduced mass and synchronized peak torque pulses make for less stress on the coupling, and the reduced rotational inertia over that of two separate engines far outweigh any performance advantages of the smoother sounding 90 degree firing order.
The Outlaw Dirt Cars were one of the few places that the 4 rotor car was allowed to run, so that's where we ran it. In the form shown here, output was around 550hp. Even at this low power level, the engine held it's own at times against the $25,000. aluminum blocked V-8s it ran against. Turbos were not allowed, so plain 'ol low octane pump gas was used.
Thread
Thread Starter
Forum
Replies
Last Post
rxmiles
3rd Generation Specific (1993-2002)
9
Aug 24, 2015 02:07 PM
ncds_fc
New Member RX-7 Technical
1
Aug 15, 2015 10:06 AM