if you want more speed, try a different prop. a good carbon fiber prop should outperform that apc.

Originally Posted by aussiesteve

Wow, Can I get you to set up my engines for me? You must be one heck of an engine set up person. I have yet to see a walbro carbed 2 stroke retain an exact rpm reading down to the last digit, from one run to the next.

Having got that off my chest, why are you chasing rpm specifically? In the top end engines (one of which is the one you are posting about) you would do yourself much better to prop it to within the power band and use an appropriate exhaust system rather than messing with the porting. When you say you are chasing more RPM, why is that?
If it is because your plane isn't going fast enough for your liking, you may be more satisfied going to a higher pitch prop. If it is because you want an engine that absolutely wrings out and lets you go very fast, I would suggest you speak with Ralph Cunningham (Antique on these forums) and ask him his opinion on what to use as I know for sure he would be able to give some great advice. You can most likely sell the 3W to fund the new product.

Ok, that is my $0.02 (0.128 RMB)

Who is Ralph Cunningham?

Originally Posted by jamesrxx951

if you want more speed, try a different prop. a good carbon fiber prop should outperform that apc.

What would you suggest?

APC makes CF props

Ralph Goes by the name of "Antique" on these forums.

He is one of the most experienced Gas engine people for our hobby out there and he knows his performance engines very well. Many of the other experienced people have been started out by Ralph as he has been working on our engines for a very very long time indeed. There would be very few he hasn't experienced at some time or another.

I don't have contact details for him right here but maybe someone will be able to supply them to you.

Originally Posted by aussiesteve

Ralph Goes by the name of "Antique" on these forums.

He is one of the most experienced Gas engine people for our hobby out there and he knows his performance engines very well. Many of the other experienced people have been started out by Ralph as he has been working on our engines for a very very long time indeed. There would be very few he hasn't experienced at some time or another.

I don't have contact details for him right here but maybe someone will be able to supply them to you.

Thanks for the info

Best prop for speed on a 55-65 cc engine is made by APC for our USRA G62 powered AT6s..A stock 62 with an open header turns 9000 in the air, the 3W should do as well.Take a ride to Rabbit Dry Lake near Victorville the weekend of 10-15 and see some 55-65cc P51s racing about 130 mph with these props...

Originally Posted by antique

Best prop for speed on a 55-65 cc engine is made by APC for our USRA G62 powered AT6s..A stock 62 with an open header turns 9000 in the air, the 3W should do as well.Take a ride to Rabbit Dry Lake near Victorville the weekend of 10-15 and see some 55-65cc P51s racing about 130 mph with these props...

Thanks for the info. I was planning on coming out anyway

Look for us in the Wreckless Racing tent/s


Don Corum, Chuck Hebestreit, Rick Maida, Richard Verano, Loren Tregallas, maybe few more...

Originally Posted by antique

Look for us in the Wreckless Racing tent/s


Don Corum, Chuck Hebestreit, Rick Maida, Richard Verano, Loren Tregallas, maybe few more...

Sound good. See you then