What ever happend to this? did everything work ok?

 

Sorry I donot remember where I read it but somebody tried it (IIRC some modification was made to roters such as to have thicker apex seals, etc) and worked fine....

 

The point was to see how well the "shallow" apex seals dealt with sliding over a peripheral exhaust.

I am interested as well.

 

I have read somewhere else that the renesis style seals did not work and lunched a set of rotor housings.

The aussies have been running the new material 13BREW sized seals in recut renesis rotors with good results though

 

I also heard of someone trying the short seal, but all that happend was when they tore the motor down the seals were warped in the middle from bending. This was on a PP motor though, so im wondering if a stock housing would be easier on them, which is what mazdatrix tried. The re grinding them deeper for normal apex seals seems to work too.

 

I'm a little confused. They are testing shorter apex seals, because the longer ones get caught in the port? I'm trying to visualize this but am not having much success.

- Steiner

 

the rotors work fine if you machine them for PP apex seals

exen with just the exuast PP, the renesis apex seals cant deal with the lack of support

 

the renny has shorter apex seals than the previous cars, as theres no port for them to go over, and its lighter etc.

the question is if these shorter seals can handle going over the exhaust port of the earlier engines.

 

All right thanks j9fd3s, that makes much more sense now.

- Steiner

 

Not shorter length, shorter beam height.

 

"Deep" and "shallow" seem to be better adjectives than "thin/thick" or "short/long".

 

any examples of them working in a PP exhaust motor without machining them,... machining is the safe way to go but its also a pita....

 

Havins spoken with some "sources" the people running them successfully are running prototype Ianetti Seals in 1.5MM size.. with Peripheral exhaust.. ala-86-88 Race engines.
The problems even with the Prototype seals are the corner seals need to be changed to the solid 86-88 style.. which have a 2MM grove for the apex.. the renesis ones break.
The corner seal size difference causes a leak in the combustion chamber at lower rpm.. I believe it was something like 20HP loss on the low side of the power band.. dont quote me though... And total power gain was not much... HOWEVER.. I think the cheaper cost.. and the minimal HP gains where the race motors live makes it worth it..
In race form if the cars are equal and the guy next to you has 5 more HP.. all things equal (driver car etc) he will pull away.
ALSO.. less reciprocating mass.. they weigh I believe the same as a set of well lightened rotors to begin with....

SO.. In essence..
Gotta procure prototype Seals that are MAJOR expensive.
Gotta run 86-88 solid corner seals.. and leak compression on the low end through the .5 mm gap where the apex rests.
Gotta buy the different Side seals, and springs
Gotta buy the different Oil control seals and related hardware..
Lighter
Higher Compression
Cheaper

For me.. I am staying with 89 rotors for now.. as the Prototype seals are too rich for my blood.
When a seal solution is come upon that is reasonable.. (grooving for 2MM seals etc) Then I personally will re-evaluate.... For now.. I will pass..

 

I know a fellow looking into running the Renesis rotors in a 2nd gen motor. The plan I suggested was to attempt to find a damaged Renesis rotor and find out how much material can be cut away to make the apex groove deeper. Once we know the average depth we can go to, it should be easy to cut the new rotors to size and drop in some 2mm seals.

-Trent

 

search for it on Ausrotary.com ... the Aussies have done it already !

Mike

 

Solid 86-88 corner seals? The 86-95 RX7 have a rubber plug in the corner seals, which I don't why it wouldn't work with those? Just wondering.

 

The Solid corner seals are stronger than those with a Rubber plug.. also the rubber plug can deteriorate in some applications..
The 86+ seals are also 2MM... to allow for the Apex seal to seat in it.. allowing for the seal.... If I am not mistaken the 8 apex seals are 1.5MM.. so you have a half MM gap on the corner seal allowing the compression to bleed out..
Also think of the fire and burning fuel during the power stroke.. and the 1/2 mm gap... the burning fuel and gasses will shoot out through the small gap.. quickly deteriorating the rubber plug I would think..
That I believe is some of the reasons that the solid corner seal is used. Not to mention Strength...

 

na there 2mm,..