Rotary Engine Failure due to Side Rotor/Side Rotor Housing Clearance..

[glenrx7]

Originally Posted by sk8world

A little of subject here.... But sometimes I wonder if all the changes some builders make cause more harm. No builders specific here I speak of but I have scene many engines fail from some of these mods. From improper ports to adding over sized studs-dowels... I speced my current motor-build but decided not to have the rotors ground as they seemed close enough. I only wish I had did more reasearch on the rotor faces for high HP clearence.

My reason I state this as I have scene many motors on here lately some even stock (ports-everything) making sick power and out lasting some high dollar built ones. Mine was built from used housings and plates, rotors, no laping or grinding, no oil mods, no extra studs or dowels, center section balanced by Luis, all oem parts except ALS seals..making 617rwhp. Have 6500 miles so far and many drag passes. Not sure how long I expect to see it last with running it how I do. I believe having everything right from wiring, tune, fuel system plays a larger roll than some of these special engine mods made.. Just my thought..

Ok back on subject.....

I agree with you Mike....... That is basiclly the point I was trying to make ..I am about as articulate as a 3 years old on acid...


Let me go back to the rotors hittting the walls.

1. yes shaft deformation is a main casuse .
2. you have to understand that when this engine gets "sandwitched together compressing the seals to a "stroke heighth" that is very small. Yes this is to keep the rotors "floating" but at high combustion it is easy to push the rotor side to side.

So, yes they can hit the plates with out having a bent shaft.


Mike, having clearnce rotors is an insurance policy I have seen engines make tons of power and then snap ...they have a bent shaft and the rotors have smacked the plates and it rebuild time ....rebuilt with clearnced rotors and they are making the same power yet lasting longer.

Rotor clearnce is not going to help much if you have a bad build or tuning wiring etc...It all has to come together to be right.

Mike....600 club, congrats dude I did not know you got that far.

[sk8world]

Originally Posted by glenrx7

I agree with you Mike....... That is basiclly the point I was trying to make ..I am about as articulate as a 3 years old on acid...




Mike, having clearnce rotors is an insurance policy I have seen engines make tons of power and then snap ...they have a bent shaft and the rotors have smacked the plates and it rebuild time ....rebuilt with clearnced rotors and they are making the same power yet lasting longer.

Rotor clearnce is not going to help much if you have a bad build or tuning wiring etc...It all has to come together to be right.

Mike....600 club, congrats dude I did not know you got that far.

Thanks Glen...