Need some info on os motor

[Childresshunt]

i recently bought a used revo 3.3 from a guy locally and he game me the truck all parts and 3 motors the stock 3.3 a picco 26 max on the truck and this os max rz that i know nothing about havent even seen this set up b4 but the motor sounds like its still got some pop in it

 

[Childresshunt]

pics of the motor

 

[chickenman242]

i could be wrong but looks like a marine engine
they appear to be nipples on the backplate and under the carb
best bet is to check the os website and look under the engine timeline,that show all the engine that they have manufacured

 

[Non Crimen]

https://www.rcnitrotalk.com/forum/showthread.php?t=79315

This is what I have found


Sent from my Pipboy-3000 in the Capital Wasteland.

 

[Rolex]

A marine engine would have a water cooled head. This appears to have a boost system.

Whatever, OS makes a good engine.

 

[Non Crimen]

Possibly a O.S. .21 RZ-V01B


Sent from my Pipboy-3000 in the Capital Wasteland.

 

[frickenjoey]

Possibly a O.S. .21 RZ-V01B

Yes it is. I had one in an Inferno buggy once several years ago. It was a decent engine. Here is the instruction manual for it. Not sure if the pump on the back really did much for it but it DID look cool...lol

http://rcdocuments.com/documents/OS Max 21rz-v01b-v01b-p-manual.pdf

 

[chickenman242]

deff aint seen one of them before

 

[2revo1maxx]

Yeah that's a boost system, I don't know anything about that particular engine though.

 

[Greywolf74]

Is the "boost" part of the engine something OS did or did someone modify it that way? Never seen that before.

 

[frickenjoey]

I will say mine ran very smooth and was the most forgiving engine for tuning I have seen. Not the fastest but, a good engine. I was pretty new to the nitro game I wish I would have pulled apart the pump just to see what was going on back there.

---------- Post added at 11:58 PM ---------- Previous post was at 11:57 PM ----------

It was made like that by OS. It was strange. I have the IPB in the link above

 

[2revo1maxx]

As the piston comes down, there's pressure created in the case that pushes the mix up into the combustion chamber while the crank scoop is closed. I have to assume the hose from the case is pressurizing the scoop (rotary valve) area about the time it starts to open up again for the next cycle.

 

[Childresshunt]

so my ? on this motor would be how do I start it the only way I can think of to is with a bump box which I will havw to put it in my firestorm to use one

---------- Post added at 11:40 PM ---------- Previous post was at 11:35 PM ----------

instrusvtion manuel confirmed the bump box but my other ? ia what head bolts should work with this motor they are missing

 

[frickenjoey]

As long as the head bolts will fit or are long enough they will fit. Most use a 2mm metric thread. See what you can find and if it fits..use it!

 

[Childresshunt]

Thanks for all the input guys ill deff be trying to find some head bolts and prob try and put this motor on my firestorm to see if it will fire off on account of that being the only car i have tht i can use a bump box
also on the other thread for this motor it said you could plug the rear hole and put a new back plate on for starting at least thats what i got out of it what would be a back plate i could use

 

[Snook Man]

That engine probably does not have a pin on the crank for a starter shaft.
If it doesn’t, you would need a different crankshaft to use a backplate capable to use with a pull, roto or electric starter.
Pull the backplate and look to see if there is a pin on the crank journal that sticks out past the connecting rod.

Bump start will work on a revo with the correct size flywheel and a starter box that fits.

 

[Childresshunt]

your prob right bc the motor came from the factory like it is but ill check to see anyways just for kicks and giggles lol but i didnt know that ill deff have to look into price of one for the revo if the motor runs but i dont wanna spend that kinda money just to see if it is gonna run. I'm going to build me a starting test station for a nitro motor at my dads automotive shop hes got all the stuff ill need to do it just gotta make a design in my head. i will only use it to crank and idle the motor tho bc i no not having a load on the motor and reving it wouldnt be good for the motor at all

 

[benlinus]

insanely fast get ab mods to tune it he has great results with this motor i ran mine today and it was superb miles faster and more powerfull than the force one in the rtr

 

[frickenjoey]

I have had AB mods but I still think ERCM is a way better product. Yes AB is pretty good however Robin does the best work I have seen. So far I have had three different modders and I am sticking with ERCM. What kind of engine did modded?

 

[sv250]

X2 for ERCM. I have owned Ab, Rb, Eb modded engines. Robins are better.