My modified Collari has a little more bottom than my regular 35+21. The Collari engine has a lower exhaust timing. It is also better on fuel mileage without sacrificing much at all up top.

The Collari crankshaft is also longer at the clutch end. This does away with the thrust bearing retainer. Instead you just use the supplied washer.

Murnan Modifieds did a great job on my motors. I sent two Max XP3.8's They are ballistic. Thanks Murnan for the hard work.

I would like to congratulate team drivers Scotty Gray, and Eric Jones for making the A main in Sedan at the US National Championship at Nuggets Ranch Raceway.

Scotty Gray qualified 2nd overall which put him directly into the A main with only 4 drivers going directly in. Eric Jones was able to finish his semi final fast enough to make the show.

Scotty ended up finishing 5th, and Eric Jones finished 9th. Both drivers encountered some trouble during the race.

Scotty, and Eric were running the RBM3. Scotty used the RB 2668 exhaust, while Eric used the Novarossi 2660. They were both setting the fastest straightaway speed during the final. Both hit 63mph on my radar gun. The other cars in the A final were topping at 61 mph. During the week the fastest 8th scale I was able to radar hit 63 mph.

My modified Novarossi Keepon .12, and Flash .12 were also hitting 63 mph. During qualifying.

I would like to thank everyone who ran my engines this year. It was great to see everyone so happy with them.

Thanks. The Maxpower XP3.8 stock version you sent is a great platform for modification. They are a pretty wild .12 engine after my modification.

Yes I have to agree!!

I am happy to introduce the new RBM3 for 2013. It is available now.

http://www.murnanmodified.com/produc...745ba44c3d00b4

Myself and a few other Team drivers ran this motor at the Nations and all I can say is WOW! Very easy to tune, very consistant and provides massive power thru all bands. I have two of them. Definitly the powerplant of choice!
Uriah has found the answer with the new modifications.

I just wanna thank murnan for helping me get into 1/10th nitro onroad. I'm hoping the onroad scene in east tn grows and our track will soon host some big events in the near future!

Please tell us more about this engine.

The engine has more bottom, and midrange with the same great top end, and runtime. My team has been testing it for some time now with great feedback.

Cheung Hang Hung – KM Racing/Murnan RBM3 Balanced finishes 9th at the World Championship!

Great job buddy!

Uriah, CONGRATS for getting one of your engines in the finals!

+1 Congrats it's not easy these days with the talent that was there @ the Worlds well done

Awesome result!!

We now have the new M21 on road engine for 2013. The new engine has a longer stroke than the 2012 model. The new engine offers more power, especially in the low, and midrange of the powerband. Fuel consumption is also improved.