ddavidv
ddavidv UltimaDork
3/23/22 10:48 a.m.

Junkyard Digs snowmobile powered RX-7

Or did I miss a thread somewhere? This thing is just...wrong, on so many levels. Which makes it fabulous.

Racebrick
Racebrick GRM+ Memberand New Reader
3/23/22 11:14 a.m.

It's a match made in heaven.

 

https://www.youtube.com/watch?v=_taqx7R_KI8

AClockworkGarage
AClockworkGarage Dork
3/24/22 2:41 a.m.

Ooh, someone finally figured out a way to cut down the rotary's oil consumption.

Chrissmith
Chrissmith New Reader
3/24/22 3:08 a.m.

I just started working on cars two years ago. Never even heard of rotary engines. Thats some sexy engineering.

Mr_Asa
Mr_Asa GRM+ Memberand PowerDork
3/24/22 6:44 a.m.

Two stroke RX7? So you mean a normal RX7?

AClockworkGarage
AClockworkGarage Dork
3/24/22 6:47 a.m.

In reply to Mr_Asa :

Nope, it's quieter, and uses less oil.

alfadriver
alfadriver GRM+ Memberand MegaDork
3/24/22 7:03 a.m.

I actually thought someone came up with a 2 stroke rotary- so it would be both louder and use more oil.  Call me sad for that not being reality.

Pete. (l33t FS)
Pete. (l33t FS) GRM+ Memberand MegaDork
4/9/22 10:34 p.m.
alfadriver said:

I actually thought someone came up with a 2 stroke rotary- so it would be both louder and use more oil.  Call me sad for that not being reality.

I am trying to picture how that would even work.  You would have spark plugs and ports on both sides of the engine? And the crankcase volume stays constant, so there would be no way to force a charge.

Air cooled Wankels used side intake ports that pulled from crankcase volume so they needed a 2 stroke level of premix, but the intake vacuum came from normal means.

Hmmm...

mr2peak
mr2peak Dork
4/10/22 2:41 a.m.

In reply to Pete. (l33t FS) :

You could use the 2nd rotor as a supercharger..

dean1484
dean1484 GRM+ Memberand MegaDork
4/10/22 10:15 a.m.

Ok I like the pull start. 

aircooled
aircooled MegaDork
4/10/22 10:51 a.m.

If you look at it the right way the RX7 is already a one stroke engine.

Pete. (l33t FS)
Pete. (l33t FS) GRM+ Memberand MegaDork
4/10/22 10:52 a.m.
mr2peak said:

In reply to Pete. (l33t FS) :

You could use the 2nd rotor as a supercharger..

I think it would be easier to just use it normally though.  Crankcase scavenged 2 strokes get their simplicity from using both sides of the piston, using crankcase windage as the intake stroke.

Now I am picturing a two stroke Wankel with a Roots supercharger on it like a GMC...  The intake and exhaust ports would have to be at the top and bottom of the engine.

The potential for incredible HC emissions is astounding!

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