Want an Rx7? Don't want to worry about rotor tips?

[Simian]

I Thank You!...

 

[energy]

A Mazda RX-7 engine IS a 1.3L. No matter what any government says.

It is indeed a 1.3 but I have seen a V5 (registration document) for an RX-7 and it did state 2600 as the capacity. No doubt someone at the ministry knows about RX-7s and doesn't want you paying the low tax bracket. I'm not sure what rule or regulation would allow a doubling of the real capacity in order to produce this virtual capacity but IIRC they did do this in racing situations i.e. >2500cc class.

EDIT: http://www.mazdarotaryclub.com/forums/showthread.php?mode=hybrid&t=381

There you go.

 

[bam0]

A Mazda RX-7 engine IS a 1.3L. No matter what any government says.

Engine displacement is determined by the swept volume of the combustion chamber, multiplied by the number of combustion chambers. And a combustion chamber is defined by the greatest volume incorporated by the spark plugs.

So an a rotary, there are two combustion chambers, 650cc's each. 650cc times two rotors is 1300cc's. Which is 1.3L. Anyone who says otherwise has absolutely NO idea about what an engine is and should NOT be allowed to EVER work on one (or in my opinion, own one).

DreXel, could we get you to take a pic of your emissions sticker on the underside of your bonnet please? Where the manufacturer's displacement is CLEARLY labeled at 654cc X2?

To be fair it does make sense to to class a 2 rotor engine as a 2.6 for comparative and equivalence purposes, a normal 4 stroke will sweep its displacement in 720 degrees of the crank.
It takes 1080 degrees of crank rotation for a single face in a rotary to complete a cycle, if you compare similar output rotations, ie 720 degrees rotation on the crank in a rotary you have 3 faces each having completed 2/3rds of their cycle per rotor so the total swept volume for 720 degrees in a 2 rotor engine is (displacement swept by a single face ina complete cycle) * (number of faces) * 2/3rds (proportion of cycle completed) * (number of rotors).
If you do this with a value of 654cc you get pretty much 2.6L
I'm not trying to catch you out with this, I know you know rotary engines better than most here, so I dont see why you object to the above so much.

 

[Sanchez]

ohmygoldlikewtfisthis

BATMOBILE !!!!!

Exactly what I thought!

 

[SB118]

... mad max intercepter..

ahem ...

The MECHANIC turns to MAX:

"I gotta hand it to you. Some machine... "

He holds up the detonators and fuse wire.

"Would've been a shame to blow it up. The last of the pursuit specials. It's history, that's what it is. A piece of history..."

[/pedant]

 

[The Running Man]

if u can afford an RX7, i wouldnt have though an extra what , 50 quid a year roadtax would get u down so much?

 

[ramirez]

The personal fuel refinery however, does !!