Vell

Hi guys,

I've opened my 13B for taking the track (drifting), so I need a reliable engine ...
What did you think about what I've discovered ?

Not measured because I haven't yet the good tools, I guess I can re-use these rotor housing even if they got some stripes ... there is a reliability problem with it or just loosing some compression ?

Second question, my front rotor has a good scratch as seen in the pictures, and a bump (just one), not so much but it's visible. I think I replace it without any reflexion ?

Thanks

Vell

And the front rotor before cleaning ... :/

arghx

iTrader: (3)

www.rebuildingrotaryengines.com

also see the engine inspection procedure in the service manual, found in the FAQ. There is a lot of stuff in there.

The problem is that you have provided no measurements. Do the rotor housings have any chrome flake on the edges? If so, how many mm of chrome flake? How deep are the grooves--do they catch a fingernail? Are there cracks at the sparkplug holes, and if so how big?

What about the irons: have you measured the step wear with a dial indicator? Have you measured your apex seal and side seal clearances? see http://www.racingbeat.com/Tech/Tech.Engine.1.htm . Have you spec'd out all the corner seals etc?

Do the bearings show any copper?

djseven

iTrader: (56)

The one good pic I see of the housing is really rough, that housing will not make great compression, probably somewhere in the 90s or so.

The rotor apears fine but not ideal, make sure the apex seal slides through the groove smoothly, with it being int he center of the apex seal it isnt really crucial. Carbon will build up in that area earlier than the rest of the rotor but it isnt a major factor.

The e-shaft has noticeable scratches in it also and I will guess the bearings have some lines/grooves in them as well. Just going off what I can see in the pics provided. Props for trying it on your own.

David

Vell

Thanks for your responses, there is some answer for what I suspect (or dont't suspect)

Measurements will come soon, I'm waiting for the tools, but in the service manual, there is nothing or so for the "rotor track" on the housing.

Concerning the seals, I'm changing everything so It's not a big deal (I think ... ?)

For the e-shaft, some bearings are in very bad condition, some with nothing in particular : waiting measurements for know what to do ...

I will take more and better pictures from critical areas !


PS : from the beginning I'm going to change every bearing & seal, but I've not planed to change rotors housing and e-shaft ... now it's more complicated...

arghx

iTrader: (3)

one rule of thumb is that if you can run a finger across the scratches in the rotor housing and the grooves catch your nail, you should get another housing

Vell

Ok, thanks for this info ! I'll try it tomorow !

cpnneeda

iTrader: (1)

Is this your first build? If so Good Luck.

djseven

iTrader: (56)

You shouldnt be able to feel the lines on the housings with the exception of hte area right above the trailing spark plug hole, anywhere else and it is pretty safe to say the housing wont make much compression. It is obvious in one of his pics his rotor housing has some pretty intense wear. Looks like it was ran without oil lubricating the housing.

Vell

Hi,

Ok, so ... the news in pictures :

Front housing


Both (a bit of dust, sorry)


Front rotor bearing


Rear rotor bearing


Eccentric Shaft (not measurerd yet, need a better stand)








As you can see, I think that all parts are for trash. "good new", I have 2 try before street porting


Now, the very bad new is that my middle plate is out of spec ...
I will take some more measurements, I want to be sure.

arghx

iTrader: (3)

not sure about the e-shaft but the rotor housings are indeed not reusable

yeah you can practice porting on all those junk housings. start with practicing the exhaust, the exhaust is easier to port IMO. read up on it

Vell

Hello,

Resolved all my problems ^^ The engine will be rebuilt soon by Hayward Rotary in UK !

I prefer this way because of the difficulty to find good used parts and the time it take to search, find, receive and rebuild.

Thanks for all advices, I hope I will rebuild a rotary engine one day

djseven

iTrader: (56)

For others who see this in the future when you see damage like the above on the bearings that almost always indicates damaged to the e-shaft. It would probably still ride but considering you can get good used eshafts for $50.00 or less all day every day it just isnt worth the risk.

Monkman33

iTrader: (28)

You can get a brand new rx8 e shaft for less than $200 usd.