Saying hello

[scops]

Hi to everyone.

I'm new to rotary engines but I'm trying to learn. Does anyone know why the intake port is located on the side and the exhaust is directly located on the sleeve? Also how is the sleeve replaceable? I mean from an image from 12rotor I found on facebook. Thank you to anyone who helps me understand this stuff and cheers!
https://www.facebook.com/12rotor/pho...475847/?type=1]

[GySgtFrank]

The side intake ports (on the irons) were placed there by Mazda for better low rpm drivability. The engines with the intake on the housings are known as a peripheral port engine. They produced lots of power, but didn't idle well enough for mass production. They are commonly used for racing though. The Renesis (RX-8) engine has also moved the exhaust ports to the irons for better efficiency. Again not as good for all out performance (turbos don't work well with them), but for what they're designed to do, they work very well.

Not quite sure what you mean by sleeve. If you're talking about the housings they are bolted together with long bolts through the irons and housings. The sleeve is commonly used to refer to the insert for the exhaust port in the housing.

[chibikougan]

http://foxed.ca/index.php?page=rx7manual

[scops]

Originally Posted by GySgtFrank

The side intake ports (on the irons) were placed there by Mazda for better low rpm drivability. The engines with the intake on the housings are known as a peripheral port engine. They produced lots of power, but didn't idle well enough for mass production. They are commonly used for racing though. The Renesis (RX-8) engine has also moved the exhaust ports to the irons for better efficiency. Again not as good for all out performance (turbos don't work well with them), but for what they're designed to do, they work very well.

Not quite sure what you mean by sleeve. If you're talking about the housings they are bolted together with long bolts through the irons and housings. The sleeve is commonly used to refer to the insert for the exhaust port in the housing.

I meant the steel sleeve that Mazda puts in the aluminum. The Tyson Gavin r12 page has a picture of a Mazda rotor housing and it says replaceable sleeve. I assume he means the steel. He built that r12 with all aluminum I presume so I don't know what he was talking about. He made the rotors out of aluminum as well. Do the A356 aluminum alloy side housings stand up to long term driving? Have you ever heard of an all aluminum (minus the seals) engine? Will it last? One other question I have is : why does the peripheral idle poorly? Wouldn't fuel injection solve that problem? Again thanks for the housing explanation.

[scops]

Thank you for the URL's. I like the project. Hope it is working out well.

[GySgtFrank]

Racing Beat sells aluminum "irons", a few places in Australia do as well. They seem to hold up as long as they're properly coated. The major downside is price. They are very spendy. The housings are already aluminum. Aluminum rotors do not stand up well from what I've heard, they are mainly used in purpose built drag race engines that get torn down regularly. The steel sleeves in the housings you are talking about are replaceable, but not easily. If you don't have a lot of experience with them it's better to have someone like Chip Ursu recondition your housings and replace them or get new housings. The chrome on the housings is always a high wear item and they need to be inspected closely as the housing surface and the apex seal need to form a very smooth fit to keep the combustion pressure in.

A lot of people have been working on re-chroming housings, but no one has been successful yet as far as I know. There are a few people that have built all aluminum engines, minus the aluminum rotors, that have worked well. There are even companies in Australia that build all billet aluminum engines. Either one takes very deep pockets to even think about.

[RICE RACING]

The Alloy end plates are GARBAGE!
I've personally seen all of them made here and use them at your own risk. The 'billet ones' ARE NOT designed for a road race car, only DRUG RACE applications.

WTF people would waste their time 'regrinding a rotor housing is beyond me' a new housing is not that much directly from Japan................ complete cockology and a bad joke to even think of 'rechroming' etc.

Most of the c-u-n-t-s attempting to do this have failed at many other 'ventures' so buyer be ware.

The 're chrome' has stepped up since so many retards make TOTAL DOG SHIT apex seals that rape rotor housings, so there are LOTS of c-u-n-t-s out there with FUCKED rotor housings.

Take a look below for some of the precision work done in Australia LOL such a disgrace and people look up to these c-u-n-t-s. I am ashamed to live here, but as a consolation its not just most in my country that makes total DOG SHIT.......





Get rid of the FUCKED apex seals c-u-n-t-s make and you will never have to resurface your rotor housings LOL.

[scops]

Originally Posted by RICE RACING

The Alloy end plates are GARBAGE!
I've personally seen all of them made here and use them at your own risk. The 'billet ones' ARE NOT designed for a road race car, only DRUG RACE applications.

WTF people would waste their time 'regrinding a rotor housing is beyond me' a new housing is not that much directly from Japan................ complete cockology and a bad joke to even think of 'rechroming' etc.

Most of the c-u-n-t-s attempting to do this have failed at many other 'ventures' so buyer be ware.

The 're chrome' has stepped up since so many retards make TOTAL DOG SHIT apex seals that rape rotor housings, so there are LOTS of c-u-n-t-s out there with FUCKED rotor housings.

Take a look below for some of the precision work done in Australia LOL such a disgrace and people look up to these c-u-n-t-s. I am ashamed to live here, but as a consolation its not just most in my country that makes total DOG SHIT.......





Get rid of the FUCKED apex seals c-u-n-t-s make and you will never have to resurface your rotor housings LOL.

Good Post
What is the small hole in the housing? I mean on the picture with pac grinding the housing by hand. The hole below the spark plug hole?

[chibikougan]

Originally Posted by scops

Good Post
What is the small hole in the housing? I mean on the picture with pac grinding the housing by hand. The hole below the spark plug hole?

That is the Trailing plug hole..