Hi folks. I was wondering.. Why hasn't any of the MFGs created a 4 stroke nitro engine that can compete bottom end wise with the electric motors?

This could be a new dawn for Nitro.

In the Motocross industry, 2 strokes were king, and now 4 strokes are superior.

Can this happen in the R/C car industry??

Imagine that low end 4 stroke grunt sound..

BBBRRRRRRRRUPP

There is 2 stroke gas in 1/5th scale. The problem with 4 stroke is you need a way to introduce oil into the engine using external means. With 2 stroke the oil is mixed in the fuel, which is basically what we run now with nitro. To go 4 stroke you'd need an oil pump and someplace to store the oil until its used, and that means alot of extra weight. I don't think 4 stroke will be that mirco sized anytime soon, but i could see other alternatives to nitro fuels in the future. Stuff like bio deisel might be adaptable and produce good hp and low end torque.

http://www.thumprc.com/

He is currently working on an 1/8 application.

http://www3.towerhobbies.com/cgi-bin...SM&C=GCI&V=OSM

I like this topic.

I do think 4stroke will be around in the near future, it will pick up slowly and of course there will be many flaws at first.

I raced mx in the era where 4stroke took over the 125 and 250. At first there were only a few guys who ran them locally and they were quite a bit heavier but they had more torque, no oil to mix with gas, etc. The downfall was that if they stalled, they were a pain in the rear to start up again! The major companies took a few years to conquer it and BAM 4stroke took over the mx world pretty darn fast. (now 2 stroke is almost non existant in the 250 and 450 class)

Will this happen to RC? I can see where people would say yes and I can see where they'd say no. But yes I do think there will be a competitive 4-stroke motor out within a few years

OS 26?

There are Many 4 stroke glow engines. Even a few under the .40 mark.

I work in the lawncare industry and over the last few years there has been a trend in what they call 4mix engines being used in handheld equipment (blowers whips). While you still need to mix oil in your fuel they are pretty much a 4 stroke design with a 4 stroke power curve, so it is possible to have one without a oil pump and related items. From what i've read and heard they are still working the bugs out of them. Regarding rc I don't see it being feasible and cost effective. I have been wrong before though.

4stroke 8T
http://www.youtube.com/watch#!v=MXk1...eature=related

There are a few more vids on youtube.

http://www.youtube.com/watch?v=igEw0...eature=related

Sound like a 4 stroke MX bike....lol

Seemed pretty heavy to me. I dunno maybe eventually we'll move that way, i'm not ready to give up my nitro engines just yet though and expecially considering the price they are asking for a conversion + engine.

What the nitro big blocks dont have enough torque or speed?

I think we would be giving up a bunch of high end just for a little gain in the low end with the addition of more weight, moving parts and potential failures.

Until I see one smoke an average nitro of comparable displacement (probably not in my lifetime) I wont even waste my time hoping.

Blue smoke and the sweet aroma of Nitro...Yep thats where its at! breeth deeply Daniel son.

LOL i hear ya. When i watched that video i was thinking wow that sounds cool, but it seemed to handle like a tank. Had decent low end expecially for the gearing he was running, but i think he was running it at such a high gear ratio to make up for the loss of top end. Going down the straight i was not impressed, and going over jumps i was not impressed, but off the line and out of corners it did seem to be more powerful. I don't think that engine would do much on most race tracks but its an interesting development regardless.

Would be a great motor for a pulling truck.

I saw that 4 stroke video.

Potential is there. I wonder what type of top end it has.

I'd like to see what the inside of that truggy looks like. Did he have to shoe

horn the engine in the truggy or what.

Also, how is the weight distribution.


I am sure, there will be a time when Just like Motocross, the 4 strokes will be

beating the 2 strokes. The technology and the want just isn't there yet.

When someone creates this type of engine, I think e-buggies and truggies

will be given a run for their money.

A mass exit from the E-world will happen and back to nitro will happen once

people will be able to have the same abilities of electric.

(Monster Torque)

Yeah, 4-strokes work in MX because they're mated to a 5/6 speed gearbox. I'm not sure how innovators are going to conquer the weight and single speed diff setups that us off-road racers use.

It's just a matter of time. It'll be fun to watch the technology evolve and then watch business models embrace it. Stay tuned! I can see this being practically implemented on the on-road side of racing way before the off-road side, mostly because of the 2-speed trannys. Off-road bashers will hop on the train first. Fun stuff