Engine Choice.
 

Looking at a new engine for my buggy. I have narrowed it down to either the Hyper 7 8 Port or the OS RG (P). Both are similar in price. The hyper looks like it would be a better performer. What do people think? I guess I will need a new exhaust to go with whichever I choose. Any suggestions there? Was thinking of the Jammin JP-2.

RE: Engine Choice.
 

I'm new to 1/8 buggies, but I can say something about the O.S. engine. I put one into my XTM to replace the stock .247 engine that was in it. The .247 was a beast. It really hauled, but it died on me, so I got the O.S. I will say that it isn't the fastest and it doesn't produce the most horse power, but it does have more than adequate horsepower and it has enough top end to be competitive on a tight track.

I can also say that I don't think that I'll ever go out and buy a new engine that isn't made by O.S., if all of them are made like the RG. I have the "X" version with the pull start. Tuning is VERY easy and it holds it. Starting is also VERY easy. This thing has been the least tempermental engine I've ever messed with. If you want all out performance, then go for the hyper. If this is going to be your only engine for now and you want dependability and ease of running, go for the O.S.

RE: Engine Choice.
 

Thanks for the input. Yeah I want the pull start as well. The GX.21 engine that is in my buggy now is just an absolute pig of an engine. It runs too hot, wont restart until it cools down and won't hold tune thanks to the needles that like to back out by themselves.

I am tempted by the power of the hyper but I don't want to start down a track that ends in less time driving and more time fixing just for some extra power. I want to be able to go out and run my buggy without having to mess around trying to get it to run. I spend far too much time doing that now with the GX.21 and I am getting sick of it. I want something reliable, easy to tune with a reasonable amount of performance. I could probably go just about any other engine to out muscle the GX.21.

RE: Engine Choice.
 

I have both, and would say go with the RG, The Hyper is a pain to tune, doesn't hold a tune like the RG. The RG has more bottom end power, while the Hyper has only a slight advantage on the very topend. I wouldn't give an RG for 3 hyper 8 ports. The RG will smoke the current motor you are running and is about the most reliable easy to tune engine out there.

RE: Engine Choice.
 

Ok so it looks like the RG is the go. What pipe and manifold should I match it up to?

RE: Engine Choice.
 

JP2 will get the most out of an RG in the mid to high RPM range without sacrifice to the low end.

RE: Engine Choice.
 

Can the RG handle 30% nitro?

RE: Engine Choice.
 

Not sure about the 30%. I currently use 20% in my GX.21 and would probably just continue on using that for the new engine.

RE: Engine Choice.
 

I've got a GX21 and a OS RG. The GX I have is easy to start and holds a tune ok once I found the right plug (OS A5 ). Apparently there is a question on longevity though mine is still ok. I just found the whole inferno RTR a cheap POS (the engine was the best bit).
But I Have to admit the RG is much better. I run mine with an 086 pipe (RB clone) and it flies. Its still quite new for me but it was well worth changing the GX for. A friend of mine has one and runs with a JP2 (jammin) pipe and says thats good too.
So I think either of these will do for you.
Stick with 25% or less, you hear stories of snapping conrods on 30% in RGs

RE: Engine Choice.
 

So you have an inferno rtr as well? What other mods have you done to yours?

RE: Engine Choice.
 

Its just got a metal spur gear and a couple of (cheap) chassis braces. Its going to be sold soon, I was breaking stuff faster than I could replace it. The engine I liked though, started easy and ran well (if a little slow). In the end I bought a hyper because the parts are MUCH cheaper and theres more choice available. The RG is in the hyper with the pipe. I built the new one from a kit and replaced a few bits with stronger items so it should (?) take much more punishment.

RE: Engine Choice.
 

The RG can run on 30%. Just go with a cooler plug and richen the engine.

RE: Engine Choice.
 

What do people think of putting an O.S. 30VG into a buggy?

RE: Engine Choice.
 

Have u guys looked into the Novarossi N21b or the Top T21BF which is the exact same engine?? They tested it on the X dyno at 1.33hp and 59 in/oz of TQ!! Thats more then last years Novarossi 5 port P5X which is a 300$ mill which dynoed 1.11 hp and 44 in/oz TQ. The Novarossi is only 189$. I have one on my Mayhem buggy and its a beast. Takes a lil over a gallon for the engine to get broke in due to the VERY tight tolerances on the sleeve and piston. But once broke in its a screamer! Walks all over the OS RG with ease.

RE: Engine Choice.
 

hey what about this looks good to me??[link]http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6044158030&rd=1&sspage name=STRK%3AMEWA%3AIT&rd=1[/link]

RE: Engine Choice.
 

Passsss. Some STS engines are great, but without part support, it's useless. Might as well get the Hyper 8 port and slap on a new car - then it'd be a better engine. :)[8D]

RE: Engine Choice.
 

you have a point since youd have to get everything from hong kong but i think im gonna go for it when i get the chance and take my chances the price is right so why not.

RE: Engine Choice.
 

I've been looking into the STS engines myself. I've been reading good things about them and they can be had for very LOW prices on ebay. As far as parts go, www.racernine.com is a dealer and the prices aren't bad. A piston/sleeve set us $50, shipped in the CONUS. That would just about make it worth doing an overhaul on a $110 engine. Of course, the conrod is another $28 though.

Now that I think about it, for $110 or so for an engine, when it dies, I'd just get another engine.

What I was more interested in was the .21 engines. I wonder how those run.

RE: Engine Choice.
 

You should think about getting a Novarossi Rex R21B or N21B (there the exact same) and getting a JP-2. Its a great combo, and you can get it off nitrohouse for around $240

RE: Engine Choice.
 

I have run 7+ gallon of 30% through an RG with no problem .

RE: Engine Choice.
 

The .21 has a more linear and smooth powerband from top to bottom so they run a lot faster offline and in top on compared to those larger engines. Offline my RB S5 would easily pass the picco .26. The picco has too much low end and the car can skid offline...not to mention it didn't like the diff setup. For the price of $110, yeah might as well buy a new .21, but check the price of a rebuild for an engine - each manufacturer and where they are sold pricing will vary.

RE: Engine Choice.
 

The os rg is a great, reliable, cheap engine you cant go wrong with that.

http://www.rcboca.com/product.php?pr...1&cat=7&page=1

it even comes with an airfilter, always nice.

you may also want to consider the gs bo1... its also very cheap, its what im running now as my back-up motor (i had a ws7 II but i had to send it back to the manufacturer) Although the bo1 has nowhere near the power of the ws7 II its to be expected and i am fairly happy with it considering how much i have paid for it...

http://www.rcboca.com/product.php?pr...2&cat=7&page=1

RE: Engine Choice.
 

That GS looks like a fun mod project. :D:D:D

RE: Engine Choice.
 

I am unsure now as to the best way to go. I really like the thought of the 30vg in my buggy. With all the torque I could potentially run much larger clutch bells. But everyone seems to really like the RG. I like the price if the RG as oppsoed to the 30vg.

RE: Engine Choice.
 

Well do whatever you like.
Why do you like the thought of a .30 in your buggy? What are you going to do with it?
The massive torque from a .30 will most likely just make your wheels spin and make it really hard to drive round corners.

RE: Engine Choice.
 

I just have it for bashing and stuff. The way I look at it is if I am gonna go through and spend money on a new mill then I want to make sure I get what I want. If you guys think the RG will suffice then I will more than likely take your advice and go with it. It's just a typical of me and prbably heaps of other people to go with the biggest and baddest you can fit in.

RE: Engine Choice.
 

I'm with SManMTB. Anything bigger then a .21 engine is unnessisary in a buggy. You just don't have the weight or the drag in the drive tran (like the monster trucks do with those huge tires and weight) to need all of the torque that those big displacement engines have. With .21s you will get more RPMs and the RPMS tack up faster when it gets into its power band. I'm racing the sportwerks .21 right now and I can break loose all 4 tires on any terrain that I've driven on yet and it still has high RPMs. There are some good big displacement engines though that wont murder your wallet... I've raced the mach .26 for a while and I've driven quite a few sportwerks .26 engines. Both only $140 and you can still beat people running those high dollar engines around the track (not in a drag race but and engine wont help you in the corners). Any of the engines that I stated make more power then the O.S. .21 RG, they are all very easy to tune and hold it well, they last just as long as the O.S. RG, and not that much more expencive. The RG is a great engine too... there are people running them at the local track and all you need is a polish job and a JP-1 pipe and that thing will scream.

RE: Engine Choice.
 

Thanks for the advice. Pardon my ignorance but what do you mean by a polish job?

RE: Engine Choice.
 

Polish job as in porting and getting it polished up (make it shiny ;)). The porting alters its timing and will make it a lot faster. STay .21 and be happy! [8D]

RE: Engine Choice.
 

Yeah but I didn't mean porting too. Polishing the inside of your crank shaft and the outside of the ports on your sleeve will let fuel and air flow a lot easier giving you a more efficient running engine.

You can also port your engine which requires some grinding on the outside of the sleeve but it mainly redirects the fuel flow into the cylinder and it can change timing. I don't sujest doing that untill you understand how these engines work first.

RE: Engine Choice.
 

It doesn't change timing unless you grind on the upper edge of the port. ;)
No worries.... grind away.

RE: Engine Choice.
 

What about something like this? [link=http://cgi.ebay.com/NIB-OEM-SH-21-Buggy-Engine-ABC-W-Pullstart-2-4hp-RTR_W0QQitemZ6047304950QQcategoryZ34062QQrdZ1QQcmd ZViewItem]SH .21 OEM[/link]

I know that parts would be hard to come by, but considering the price, I'd consider it a disposable.

RE: Engine Choice.
 

wELL, IF YOU WANT TO GET THE NOVAROSSI GET IT AND THE jp-2 off of nitrohouse its really cheap there, andnthey have good service.

RE: Engine Choice.
 

..... and if it doesn't perform to your liking you just wasted $70.......:eek:

RE: Engine Choice.
 

OS, RB, Novarossi, JP - you can't go wrong with any of those. You get what you pay for...remember that. Still want more than the OS .21RG, the RB Eco .21 is $179.99 and has plenty of power.

RE: Engine Choice.
 

Forgot about the Eco. Haven't tried it but teh quality should be great.

RE: Engine Choice.
 

http://www.rbproducts.com/mainEn.php...roduit=01003-E

Great engine for those on a low budget. http://www.rbproducts.com/images/RB%...PT/01003-E.jpg