HAY ANY ONE KNOW ANYTHING ABOUT THE EVOLUTION 26 OR 35 GT GAS MOTORS IF THERE ANY GOOD ,I GESS THEY ARE THE MORRIS HOBBYS MVVS THAT THEY USE TO HAVE ,AND I THINK THEY STILL SELL THEM AS MVVS,IS THE EVOLUTION THE SAME ENGINE AND IF THEY ARE ,ARE THEY ANY GOOD,IM THINKING OF BUYING ONE .
I CAN GET THE 26CC FOR $350 AND THE 35 FOR $400 .
I STILL THINK THERE A BIT HIGH IN PRICE, THATS Y I WANT TO KNOW IF THERE ANY GOOD OR NOT.

THANKS, JOHN

I have the 35cc MVVS, it's a well made motor but a little heavy, it will pull a 15, 16 pound plane, I have mine in an ARF 82 inch Gee Bee Y, it weighs 15 pounds and it's a high-drag plane, and it flies great, I burned 89 octane last year but this year I'm going to 94 octane so I'm sure it will pull a bit better, I'm sure in a lower drag plane even at 15 pounds you will have better results,,,

with 89 octane mine will twist a Zinger 20x8 pro at 7590 tops (pretty much the same as the ZDZ & Brison 40), I tuned for flight at 7400,,,

in fairness to the ZDZ & Brison 40 the MVVS 35 will not pull a Zinger 20x10 pro, while the ZDZ and Brison will..

so if you have a large cowl like a Gee Bee then a 20x8 is the prop you will have to use, if you have a small cowl then you could twist a 18x10...

Jim

My Evolution 26 turns an APC 18-8 at 7900 RPM using 87 octane and Bisson side mount muffler.

I think it is a light engine, not as light as some others, but at less than 3 pounds for engine, muffler, mount and ignition, that's pretty light

Can compare the ZDZ40RE with same prop (Menz 19*10) and exhaust configuration to the MVVS35. The MVVS35 did 200 rpm better.

Just to be fair -- the ZDZ40 RE--will on a JMB muffler turn 21x8 Mejzlic at 7200- and on pipe with 22x8 Bambula wood - at 6700 easily and that is one heavy load .
two different engines - also we have tried different carbs to reduce low end vibes --and it works -
On a good in cowl muffler on a third engine - a 22x8 Bambula at mid 6000-
Other 40's I have run were pretty much in same ballpark-
The carbs have been on some frankly a problem PITA --but it has always been--the carb -- not the engine .
The 26 Evolution is just plain ol one of the best really small gassers I have ever seen - mine likes to run over 8500/ aprox on the ground for all around best power and that ends up 9500 in the air - on the current Funtana - on the Showtime this setup was simply ballistic I have use the supplied pipe and header same results -
anyone who gets poor performance with this engine either has done something wrong - or somehow damaged the engine .

What prop are you turning on the 26 and getting 8500 rpm?

which props?
actually I use mostly Skorepa props but I alsorework Zinger Pro
essentiually they are "about" 18x6 "types some 18x8 .
and I always use tuned pipes I have used the stock one excellent and Ed's new CF pipe same performance less noise and about 1/2 the weight .

I have a 35GT and love the power it gives me. What I like the most about it is the mounting capabilities. I used the stock mount with no problem when I placed it in my Giant U-CAN-DO. 20x6 prop and hover at a little over half throttle.

Are you having the BLACK GOO problem? What oil are you using and what mix?

I have the 26cc with tuned pipe. Turns a 18-6 Mejzlik 9300 on the ground. The motor is a sweet heart and runs great. Only complaint is the spring loaded choke, it is a pain. A detented choke would be much better. I just prime mine since the carb is right up front and it starts great with no choke.

What airframe is your engine in Xcell?

Fiery
Ultra R/C Giles 202