Taller apex seals in Rx8 rotors - is this common yet?
07-23-2013, 02:25 PM
#56
ah, you are correct!
I used atkins rx7 solid corner seals, I had to do some light sanding in the apex grove of the corner seal, for the side clearances but they have the same diameter so it fit fine.
at the time goopy's website was done and I didn't realized they too offered solid corner seals, had I know that I would have went with them, to match the apex seal.
the OEM rx7 corner seal actually used a rubber center insert, the rx8 uses a metal center insert.
many rx7 guys had this rubber part burn out over time, well with having side exhaust ports on the rx8 I figured they would burn out instantly so that is why I did the solid rx7 corner seals
car runs great, Idle is bang on, vacuum is only 15inhg but performance seems the same if not better, only has about 450 miles on it. it might have pulled better vacuum if I used tighter side seal clearances.
I used atkins rx7 solid corner seals, I had to do some light sanding in the apex grove of the corner seal, for the side clearances but they have the same diameter so it fit fine.
at the time goopy's website was done and I didn't realized they too offered solid corner seals, had I know that I would have went with them, to match the apex seal.
the OEM rx7 corner seal actually used a rubber center insert, the rx8 uses a metal center insert.
many rx7 guys had this rubber part burn out over time, well with having side exhaust ports on the rx8 I figured they would burn out instantly so that is why I did the solid rx7 corner seals
car runs great, Idle is bang on, vacuum is only 15inhg but performance seems the same if not better, only has about 450 miles on it. it might have pulled better vacuum if I used tighter side seal clearances.
05-06-2015, 12:34 PM
#60
05-06-2015, 03:49 PM
#61
BTW ... I have a way of using a stock compression tester to give you all the info you need ....
Last edited by Brettus; 05-06-2015 at 03:51 PM.
05-06-2015, 05:47 PM
#64
SARX Legend
iTrader: (46)
OEM seals here, 25,000 miles or so, good compression numbers when I tested it while we had three different (TR, Rotary Diagnostics, and the Mazda tester) rotary engine compression testers here last year. I still have great vacuum and it runs well so I assume it is still healthy for the moment.
Seems risky to me unless the builder recommends it and has experience doing it. A trick?
Seems risky to me unless the builder recommends it and has experience doing it. A trick?
05-06-2015, 05:53 PM
#65
There are likely numerous tricks/points of knowledge required for the whole assembly. My recommendations for engines is well documented
However I should clarify to mean 'after broken in'. Even the best built engine is likely a little weak on the first crank up ...
However I should clarify to mean 'after broken in'. Even the best built engine is likely a little weak on the first crank up ...
05-07-2015, 04:56 PM
#70
SARX Legend
iTrader: (46)
I agree, 10psi is my limit. I generally run around at less than that though. I have been driving the car daily for over a month now, I can't seem to get back into the daily
Speaking of that, do you run more than one boost profile on your EBC? I do, and my AFR's are pretty rock solid regardless of which one I run, low boost or "high" boost.
05-07-2015, 05:00 PM
#71
Been doing a few track days lately and always turn boost down to 10-11 for those . Have settled at 13-14 psi for street as the setup seems happy there . At 16 it was always on a knife edge .
05-07-2015, 05:04 PM
#73
SARX Legend
iTrader: (46)
Yeah I will experiment when the big turbo goes on. I (well Pineapple Racing) plan on rebuilding the engine at that point whether it is blown or not and I will use as many new parts (housings, eshaft, rotors) as I can, WPC coat a bunch of stuff, etc.