Rotary Reliance

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stocks71
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Rotary Reliance

Post by stocks71 » Sat Apr 09, 2016 12:00 am

Hello All.
Being a Sucker for something Interesting but Unreliable I got myself an RX8 a year an a bit ago. Zoom Zoom they used to say. Very true as fast and smile producing with all the quirks I like. Including internally exploding at high speed ! Anyhow thought you Chaps may like some tear down photo's and rebuild Rotary news. Here are a few snaps so far -
Car as was in France last year.
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Home made engine hoist frame worked a treat. Would not use on Essex as more than double the weight!
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Cause of problem rear bearing on eccentric shaft. Material is everywhere in engine, pipes ect.
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Eccentric shaft knackered.
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Rotors are crusty but OK I think. Apex seals worn but still had good compression. 6.9ish all round on test.
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Damage to rotor housing caused by bearing going maybe?
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CRUSTY but will polish up. I hope. New seals ect.
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Component wise it is light. ECU and gubbins heavy though.
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Pain getting the engine out because of all the wiring and pipework but the engine is nice to work on. Makes me want to put it on Carbs for a simpler look :)

Paul


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2004 Mazda RX8 231PS - Broken
1990 Golf GTi 8V - Daily

stocks71
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Re: Rotary Reliance

Post by stocks71 » Fri Apr 15, 2016 11:49 pm

Rotors cleaning up OK. Of to specialist tomorrow to see what I can salvage off the old engine and what I need to source. + get new bearings fitted.....
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Re: Rotary Reliance

Post by Oaksey » Fri Apr 15, 2016 11:51 pm

Watching this with interest; I do like a nice RX8 8)


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Re: Rotary Reliance

Post by stocks71 » Fri Apr 15, 2016 11:55 pm

Scim is on daily duties so took the chance to park next to an earlier Rotary at Tesco the other day. :)
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RX7 and Scimitar
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Re: Rotary Reliance

Post by stocks71 » Tue Oct 11, 2016 10:51 pm

Update - Scimitar still going strong. 5000 + miles while fixing the RX8. Good Girl.

Nearly ready to put 13b engine back in now.

All cleaned up. New E-shaft, bearings for rotors and stationary gears. New apex seals + new springs for side seals and corner seals. Originals seals were fine.....I hope.
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Putting together the sandwich. New water jacket seals. Plus silicone (red) at bottom section near sump.
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New apex seals going in. Lots of vaseline applied + 20W50 oil on bearings ect.
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Rear plate torqued up. Rear stationary gear in middle holding Eccentric shaft. Flywheel to attach. + 52mm nut torqued up to 400Nm ?!
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Front end. Oil pump. E-shaft counterweight.
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Getting ready for sump.
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Nearly there. Front pulley bolt to tighten plus rear 52mm nut. + end float
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Compact 90ishKG Hopeful 210+HP. We shall see. New 2 ton crane purchased which will also come in handy for the Essex.
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Cheers, Paul


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Re: Rotary Reliance

Post by malthouse » Wed Oct 12, 2016 8:08 am

Looks lovely , both the 12a and 13b engines are a delight everybody should try to get the oppotunity to drive a Rotary.
But dont forget to check the oil measing device is suppling oil where its needed in the correct quatity.

Dave Peek



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Re: Rotary Reliance

Post by Roger Pennington » Wed Oct 12, 2016 11:12 am

That looks great, Paul! :D

Unfortunately I've never had the opportunity to actually drive a rotary, but I've always been intrigued by the idea that a whole working engine could be distilled into such a compact, smooth-running, unit. :)


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Re: Rotary Reliance

Post by stocks71 » Wed Oct 12, 2016 10:56 pm

It was smooth and free-revving Roger if my memory serves me correctly. Looking forward to hearing and using it again. Your right as well Dave. I also premix with a good 2 stroke FD grade oil in the fuel. Only 150ml per tank-ish. The OMP that feeds the oil is left side middle on the last photo. You can just see the 4 oil pipe feeds to the rotor housings. The inlet manifold and associated ducting, filter and throttle body are very clever but unfortunately ugly and cover the engine once fitted. Would look much better with a Holley 4-barrel downdraft carb. Or Weber set up........


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Re: Rotary Reliance

Post by willholderogri » Thu Oct 13, 2016 7:46 am

I rode a rotary Norton it was superb (they won a lot of races in their day )


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Re: Rotary Reliance

Post by philhoward » Thu Oct 13, 2016 8:08 am

willholderogri wrote:I rode a rotary Norton it was superb (they won a lot of races in their day )
Quick tenuous Scimitar link - an early SS1 was built with a pair of Norton rotaries bolted together, replacing the CVH engine (the Norton factory was yards away from a satellite Reliant factory in Shenstone at the time). On the first trial run it scared the builder poo-less who promptly removed said engine.


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Re: Rotary Reliance

Post by scimjim » Thu Oct 13, 2016 8:21 am

And that factory still produces small rotary engines - for UAVs :-)


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Re: Rotary Reliance

Post by toomanysabres » Thu Oct 13, 2016 11:49 am

Roger Pennington wrote:That looks great, Paul! :D

Unfortunately I've never had the opportunity to actually drive a rotary, but I've always been intrigued by the idea that a whole working engine could be distilled into such a compact, smooth-running, unit. :)
Many moons ago I went on a day sales trip to Nixdorf computers in Germany. We were picked up at the airport by our local sales guy in an RO80.
What I noticed particularly was when going fast on a motorway the engine noise didn't increase as you would expect in a normal car.


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Re: Rotary Reliance

Post by willholderogri » Thu Oct 13, 2016 12:04 pm

that's interesting Phil they would probably be putting out 200 to 300 BHP.


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Re: Rotary Reliance

Post by MarkHawkins » Thu Oct 13, 2016 12:13 pm

NSU RO80s - I remember a few years ago these would crop up in the small ads for a few hundred pounds with V4 conversions.


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Re: Rotary Reliance

Post by Roger Pennington » Thu Oct 13, 2016 12:33 pm

willholderogri wrote:that's interesting Phil they would probably be putting out 200 to 300 BHP.
If you're interested in the history of this, there's more on this Norton Owners' Club link (read almost all the way to the end). The project seems to have been instigated by Dennis Poore, industrialist, racing driver, and hill climb champion :D


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