Machining rotors for high revs and oil pressure

[BuckyFD3]

I'm looking at machining some 8.5:1 rotors for my engine so i can rev it a bit higher safely without them hitting the side plates. How much do you machine off the 2 faces??? Also I have E shaft oil jet mods done and my oil pressure is just over 4kg/cm when driving around, is this oil pressure high enough to support the bearings?? I'm running big HB port and a T04R.

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[RXBeetle]

Old rx7 competition manual says .13-.17mm clearance for a 9000rpm 12A pp motor. Hope that helps.
http://www.wankelkim.net/rx7/comp.manual.pdf
PS 4kg/cm is about 57psi for us here on on the other side of the pond.

[BuckyFD3]

Cheers looking through it now.

[BuckyFD3]

anyone??

[Dom_C]

So you would machine .005 off the whole face of the rotor? Hmm I might have to look into that.

[BuckyFD3]

I machined off 10thou of each face. You can take 12thou off but i didnt think i needed it as I dont want to rev OVER 9K.

[Grizzly]

From doing a Bit of Reading be carfull not to go too much, There is quite alot out there about Side seals comping out of Place at high RPM. I admit i'm not sure how much was removed though but best not to guess.

[stevenoz]

You take about .0025 or .003 off each side of the face of the rotor. It won't hit the whole rotor....just the rotor landing.

[BuckyFD3]

Originally Posted by Grizzly

From doing a Bit of Reading be carfull not to go too much, There is quite alot out there about Side seals comping out of Place at high RPM. I admit i'm not sure how much was removed though but best not to guess.

I see what your saying but when you get your finger inside the port and feel the side seal, I can see how it can come out that far.
There isn't much seal exposed once the engine is bolted together.