Really Weird Question

I have been looking up more on the motors lately and read a post about boring out a rotary. I had a theoretical question for you guys. Does changing the combustion chamber recess size change the engine at all? It seems to me that it would. If bored out there could be more air pushed into the engine. Is this logical?

Boring out a rotary engine? No such thing. Perhaps you have this confused with porting.

I think he means machining out the recess on the surface of the rotor?

if you could do that your compression would drop.

Oops my bad. Yeah that's not exactly a good idea.

Yeah I meant the recess on the rotor. It was just a thought I had. So changing the size on it at all it bad for performance? What if it were possible to decrease the size then? I am speaking hypothetical.

I guess it could theoretically increase compression, but then it would change the "shape" of the combustion chamber. I think it's there because it needs a "concentrated" place to combust.

Ok I was just thinking of something, because in an old post someone was talking about boring out a rotary and it got me thinking.

there he goes with the boring out a rotary again...

I never asked about it before Soyo, I was just thinking how to get more displacement, compression. Whatever it is to increase performance.

I meant you said it in the first port, then they said you can't bore it, then you just said it in the post before mine... rotarys aren't displacement engines really, bout all there is to it

to truely bore out a rotary you would have to over bore the rotor housing which would make it junk and find overbore rotors to match the the housings that now serve no purpose.

yeah I know, never plan on doing it just having a thought in physics class about it. So the only thing to do to an engine when its apart is port it. Right?

yea, heres a page that will give you info on ports if you need it http://home.iprimus.com.au/bluey3/portsPage/ports.htm

you can upgrade the seals inside the engine and you can upgrade the rotor housing to third gen specs.

Nice thanks soyo, I had seen a site with porting before, but this one shows everything better.

flex, are you saying that I can upgrade a 2nd gen to 3rd gen specs?

I have never done a rebuild before. I plan on doing one this summer, about how much would it cost for one? Worst/best case scenario. Thanks

Well I'm on rx7club.com and I went to on of the local meets here in washington. Atkins Rotary is located up here and dan atkins "the son" bought his 82 supercharged rx-7. He said the iron plates were from an older engine, but he rotor housings were 93 spec which I read were reinforced.