O.S. Engines FS26 II four-stroke car engine

[StevePond]

http://www.rccaraction.com/pics/os/OS_FS26V2_1.jpg

O.S. Engines will be delivering a new four stroke engine for enthusiasts of these throaty, torquey engines. Details are few on the exact differences between this engine and the original version, but we'll update you as we learn more.


http://www.rccaraction.com/pics/os/OS_FS26V2_2.jpg

[Racer Rob]

Looks like they just put a 2 needle carb on it to me.

[packerfan3022]

are they gonna put a pullstart on it?

[StevePond]

It doesn't have a two-needle carb, but it's a bigger carb than the original four-stroke, and it can be replaced with a 10ER two-needle carb very easily. The manifold also features a clinch-type carb retainer, so the angle of teh carb can be adjusted. It will also be available as a pull-start model.

[thedarkness]

that thing needs a blower! i wonder how long untill you can only use four stroke r/cs in california.

[racinlosi]

Hopefully a long time! I ride at the desert all the time, and then this will mean all new quads. Do you think families can use $50+ thousand in one weekend after that law? I don't think so! Plus RC is better off with 2 stokes, for the cars. But 4 stokes are still cool! :D

[fuzzy2133]

redo the FS40 in pull start now! although the 26 is a good start. :D 2 stroke R/C cars will never be outlawed, a very low amount of people even know they exist and that is good for us.

[RCMadMatt]

A four stroke 4wheel drive stadium truck would be interesting. :)

Matt

[racinlosi]

A four stroke 4wheel drive stadium truck would be interesting. :)

Matt

I am thinking about that for my NMT with a supercarger on the 4 stroke, but then the carbon fiber tuned pipes came out. Now I am stuck on 2-strokes still. :D

[nolanfarmer]

That is a new valve cover with more room in it. This would lead me to suspect it has more lift and\or a different rocker arm design.


Nolan

[RCMadMatt]

I am thinking about that for my NMT with a supercarger on the 4 stroke, but then the carbon fiber tuned pipes came out. Now I am stuck on 2-strokes still. :D
//*the carbon fiber pipe is not the thing you were looking for*// :cool:
If you build the 4 stroke NMT, it will be cool!! And you will be happier!! ;)


Matt

[racinlosi]

haha, funny guy! Well, would the carbon fiber tuned pipe they make for the 2 strokes work with this engine? And if not, how come?

[fuzzy2133]

haha, funny guy! Well, would the carbon fiber tuned pipe they make for the 2 strokes work with this engine? And if not, how come?

it should work, just be more of a muffler than tuned pipe.

I hope O.S. did the right thing and made the cam as high performance as they could. be even better if the rocker arms are full roller rockers. :cool:

[wildcat1971]

what type of car is this for? Does not seem like it will work in 1/8th scale offroad

[racinlosi]

OH, also, does this need any convertion to run in a car? What size mounts can this work on without a convertion. And what is all needed to get it running a car?

[tntpower]

Is it a nitro or gasoline engine?

[GilbertCCK]

actually Japan aready issue a month at least, also Kyosho had the conversion kits which make it work on 05 series and V-One series. I just got one set ordered from Japan and tested it 2 weeks before.. the engine sound really like the real car..but proformance....I still have no idea how to make it good... it just have one needle for adjust.....+_+!

[fuzzy2133]

one needle should be all that a 4 stroke needs. it won't load up with fuel like a 2 stroke.

[Dan H]

what type of car is this for? Does not seem like it will work in 1/8th scale offroad

There's a drop in conversion for the Kyosho FW04 and it was released as a kit a while ago. I have the older 4 stroke .26 in my FW04 and while its different, the only real advantage is fuel mileage and torque out of the corners on small tracks.

Thats why I removed the .26 in favor of a 2 stroke. However, I hope this new .26 has more power and a little more top end. Then I might consider dropping another thumper in my FW04. :)

[ProF1TOOL]

GilbertCCK- I've have been thinking of getting that kit but I wasn't aware that it's out. What shop did you order it from and what was the cost?

Thanks

[dragoneuh]

That's a hugh Pinion.
This motor must have lots of torque...

[sosidge]

These engines are amazing pieces of engineering to me... but four strokes is a lot of time between combustion for just one cylinder, it must affect the engine's performance.

Now if they made a compact twin for cars... that would be amazing!

[losi4life0007]

Any conversions out for a stadium truck yet???

[jakestreats]

Hi i have done a few conversions for a stadium truck ,but mostly supertens with 2 speed boxes ,i have one for sell which is on ebay at moment my id Ebay name is jakestreats or goto my webpage ,thanks :D Its all new in the box (special addition superten four II ) with all upgrade as standar :eek: d
www.picturetrail.com/jakestreats

[LiTtl3_Mik3]

Hey steve,

Can this motor fit in to a regular tourer like a trinity G4?

mike

[ProF1TOOL]

Hey steve,

Can this motor fit in to a regular tourer like a trinity G4?

mike

No, it won't fit.

[Drillah]

It also fits into the 1/5 ThunderTiger Bike :) (With a bit of persuasion)


Since this engine likes to get REALLY hot, I wonder why they did not make the new one with bigger fins or even put some fins on the valve cover.

[fuzzy2133]

does the valve cover get hot enough to where fins would help?

[Drillah]

It's really hard to get a good temp reading in the bike, much less get a reading on just the head or the cover separately. I'm planning on getting a venom temp monitor so I can see where it's geting the hottest, hopefully the cover so I can make a new one with fins on it.
There have been a few guys who have made their own devices to mount under the head using modified computer CPU heat sinks and they've said it keeps the temp down and they don't need their fans anymore.
I've also heard that running 30% helicopter fuel keeps them cool while adding a bit of power too. Something about no castor in it and heli fuel is designed for engines running at half throttle all the time....hovering with not much airflow over the fins. I've yet to try this though as I'm doing a bit of upgrading at the moment.

As mentioned earlier by someone else, I too hope this engine has more top end power.

[Dan H]

Drillah, that looks sweet! Any more info on the modifications done?

[Drillah]

I had to remove most of the left frame.
Machined a 90 carb intake.
Custom exhaust 90deg manifold.
Custom motor mounts.
Custom SSTL drive shaft (layshaft).
Things I'm still working on....
- New carb intake manifold.
- Custom valve cover with fins.

[jakestreats]

hi i would be interested in some Custom valve cover with fins if you are willing to sell them.

[Dan H]

I had to remove most of the left frame.
Machined a 90 carb intake.
Custom exhaust 90deg manifold.
Custom motor mounts.
Custom SSTL drive shaft (layshaft).
Things I'm still working on....
- New carb intake manifold.
- Custom valve cover with fins.

I would be most interested in a new carb intake manifold that allows a transverse engine setup. (thinking of doing a new project) Similar to the manifold on RCCA's RC10GT 4 stroke project.

[Drillah]

OK guys, as I make progress with making the parts I'll keep you updated. It might be a while becuase I do it in my spare time and also use the machines at my work so if you don't hear from me for some time check this thread: http://www.rcgroups.com/forums/showthread.php?t=198444&page=1&pp=15 as I am there pretty often.

[nolanfarmer]

I have wanted to do a FS26 in a bike. Looks like you beat me to it. What you need is a head with the intake port coming out the side. I will let you know if I get around to designing one. The motor will probably never run right with a 90 degree manifold.

Nolan Farmer
FPM

[RespirologyRC]

I wonder what ever happen to the big push for on these engines?

[Kmot]

Mr. Farmer:

Did you ever make kits for the conversion of the F201 available? I remember reading about the car a few years ago with fascination. But then I do not remember hearing much more about it.

[minitdriver]

this engine sounds really cool. Of course it's i think too early get super excited about its performance. I think they only way to think about this, is like with dirt bikes. For a long time 2 strokes were the only way to go because 4 strokes were "weak". But after more and more of a push(from treehuggers mostly) 4-strokes were pushed into the #1 priority spot and look now. They perform better, faster, and more reliably then a 2-stroke ever could.

so maybe we as rc enthusiasts should show more effort and interest in 4-stroke engines, cuz i doubt an environmentalist will poop a brick about a .12 rc engine. who knows, maybe in a few years 4-strokes and 2-stroke will be battling it out on tracks all over. That would be freakin awesome.
stay classy

[pleaseletmeon34]

Yes Mr Farmer,
When will you be offering the F1 kit? Looks like people all over the world are waiting for it, its on just about every R/C forum. I myself went out and bought an FS 26 when I saw pictures of your car, thinking the kit would be out shortly.

[Drillah]

I have wanted to do a FS26 in a bike. Looks like you beat me to it. What you need is a head with the intake port coming out the side. I will let you know if I get around to designing one. The motor will probably never run right with a 90 degree manifold.
Nolan Farmer
FPM

Thanks alot.
I haven't touched the bike for a few months. I mean to make the carb adapter from tubing straight off a flange so the 90 won't be too abrupt.
If you come up with something let me know what I can do to assist.

Did you see the terrible riding in my vids?

[Mr. Schumacher]

Did you see the terrible riding in my vids?

Any links for your video?

[Drillah]

There on my home page. click my name then go to homepage.

[Mr. Schumacher]

The 4 stroke bike is slower than I expected. Is there any way to improve the pace?

[kawasakirider]

i highly doubt you would get much power out of such a small 4 stroke engine

[kawasakirider]

this engine sounds really cool. Of course it's i think too early get super excited about its performance. I think they only way to think about this, is like with dirt bikes. For a long time 2 strokes were the only way to go because 4 strokes were "weak". But after more and more of a push(from treehuggers mostly) 4-strokes were pushed into the #1 priority spot and look now. They perform better, faster, and more reliably then a 2-stroke ever could.

so maybe we as rc enthusiasts should show more effort and interest in 4-stroke engines, cuz i doubt an environmentalist will poop a brick about a .12 rc engine. who knows, maybe in a few years 4-strokes and 2-stroke will be battling it out on tracks all over. That would be freakin awesome.
stay classy


im sorry i dissagree with the thing you said about four stroke dirt bikes having more power than two stroke dirt bikes nowadays a 2 stroke 125 is i tiny bit faster than a 4 stroke 250 and a 2stroke 500 would flog a four stroke 500


Trent

[that_one_guy]

ya its like a raptor vs a banshee; the 350 2stroke banshee will outrun(mostly) a 660 4stroke raptor (depending on mods, of course). but i dont know about the new 700 efi raptor...

and if you look in races, they normally let 400 4 strokes run with the 250 class.

the thing about fulsize motors is 2 strokes have a crazy powerband, get on the gas at idle on a 250, nothing. wait a second and hold on to your ass!!! hop on the gas in a 400 4 stroke at idle and youl break the tire and have a crazy ride. i like 4 strokes in the woods/trails, and 2strokes for fields and track, personally

[NiMo]

I like the way you describe the drivability of torque over revs, i recently tried an OS 18 in my FW05, on standard 20/26 (37T diffs) gearing the car was just to quick out of the corners and was difficult to control the torque, but after switching to 23/28 gearing I still had a little too much toque but it was so much more drivable, and although slower than a .12 Rossi in a straight line it was so quick and easy to drive through the infield, by the way I had to remove it due to complaints from other racers.
Now I am thinking of putting the FS26C in to the car but I would need to get some bigger gears to match the torque of the motor, I believe Kyosho released some 31/34 gears but I have never seen them for sale anywhere.
I had to adjust the 2nd gear clutch to about half a turn for the .18, this is normally at 2 turns for the .12, so what would the settting be for the 4-stroke?

[rc_rich]

Steve, will thie engine be available with an SG crank?

[mrkinigit]

how long before we see somthing like this in a savage? or am i not looking hard enough?

[NiMo]

Not a Savage but here are some Tmaxx 4-stroke vids
http://www.rcgrabbag.com/rccars/videos/contemporary.htm

[nolanfarmer]

Thanks to all those still interested in the Four Stroke conversion for the Tamiya F201 chassis.
After near disaster from an ailing economy ( Which was the reason I had the free time and tools to produce the machine in the first place) I now have taken full ownership of Farmer Plastics and Machining and am spending a few hours each week on the next revised prototype.
I still don't know If I can ever find the time or resources to offer a kit But I promise to try.

I will keep you all posted.

Nolan

I love my thumper!

[nolanfarmer]

Yes I saw the vids Drillah.................I've vever driven a bike, it looks tricky.
I would love to make a V-Twin bike, Hmmm.

Nolan

[pleaseletmeon34]

Build the Tamiya first :D . Might be easier to to build an opposed twin bike

[smoky]

would a 8th scale buggy be a good app for a 4 stroke the tmaxx video looked like it has pretty good power. anyone with exp?

[smoky]

would this 4 stroke fit in a 8th scale buggy. i think thatd be pretty kick ash.

[that_one_guy]

are there any mods for 4 strokes, like cams and rockers like 1:1 scale motors???
i think it would be sweet to have a short stroke 4 stroke with a really high duration cam with some overlap and that would mabey give some rpm and horses, but make bottom end less than desirable.
i donno, in 1:1 scale, i personally would like to have a high revving chevy small block 380 (4.155 bore x 3.50 in stroke)that makes 600 hp at 8k and 400 lb-ft at 6k, than a stroker 383 (4.03 bore x 3.75 in stroke)that makes 500 hp at 5k and 500 lb-ft at 3800k.

the differences between those motors are the bore x stroke, cam, and intake.(and lighter components in the screamer) and i personally think that if a company made a .26 4 stroke that spun 15-20k and belted out a couple horsepower they would be popular

just what i think...

[zakerid]

4 stroke revo (http://home.comcast.net/~dp250f/video/RevoThumper.wmv)
here is this build thread (http://www.rcccs.com/index.php?showtopic=683&view=findpost&p=9486)

[N2-4x4]

Hmm that is very intersting find.

[nolanfarmer]

The bad news is the FSF1 project has been shelved again for various reasons related to manufacturability and cooling problems with the stock engine.
The good news is I have started an even better project in my opinion. It all revolves around a new head I am machining. I can't figure out how to post the pictures here so go to http://www.rctech.net/forum/showthread.php?t=47677&page=15&pp=30&highlight=fs26s-c
Lets put out heads together, (pun intended). If this thing works there will be more applications for this engine.

Nolan Farmer

[TRXrevoRacerOS18]

what do the four strokes run on, nitro of gasoline, if they run on gasoline im definately buying one

[TRXrevoRacerOS18]

im guessing nitro, according to the vids i watched

[zakerid]

nitro...

[awnelson]

I have added pics in General Discussion since they cannot be added to the moderators post.

[Pat Fierle]

Would this motor fit into a xxx-nt drake? I think it would be cool to put it into a stadium truck. Has anyone ever tried doing this other than i beleive it was the r/c nitro mag that put it into the rc10gt.

[Sherminator]

how many RPMs is that thing gonna produce??