Ryobi
 

Dear All
I have a converted Ryobi 31cc engine in my 1/6th scale Spitfire.
I am getting 6100 rpm on an 18/8 prop, this is not quite enough for the spit.
The question is what kind of rpm are other people getting with this set up.
A friend of mine told me that some people are getting nearer 7000 with this set up.

Regards Phil G.

RE: Ryobi
 

are you running the stock carb?

while most think that 7000 rpm is where it is at, I got better static thrust with a 16x8

Darin

RE: Ryobi
 

Dear Darin
Yes I am using the stock carb.
We are now putting diferent piston rings on, they are the ones from Frank somebody in the US.
Sorry I can't remember his other name.
Regards Phil G.

RE: Ryobi
 

Hi nmacwarbirds! I was getting 8100 rpm's on an APC 18x6W prop, I was using the orignal carb with the venturi opened up to .400 in diameter, gutt out muffler and the reed valve stop set at 1/8 inch clearence I am at sea level using regular gasoline (87 octane) and amsoil at a 50:1 ratio but you can use a good synthetic 2 stroke oil at a 40:1 ratio,now I am using the same engine,but I've changed to gasoline/ethanol mixture(60/35 %) Nitro 5% and amsoil at 50:1 ratio (about 2.3 oz. per galon) and using a glow plug as my ignition source and I am getting 8000 rpm's but better torque and power.

RE: Ryobi
 

aeronut is right on about the muffler, try running it without the muffler, put the Frank Bowman rings in it and you should be there . Is it a twin ring model?

ps if you end up getting a new carb for it get a wt499 it will work for gas and if you like, run it on glow as well.

Darin