RB Engine Thread
 

I haven't seen a thread started on RB engines so I figured I'd start one.

I have a question about the RB V12 5 port engines. Anyone use it? How do you like the power? How's the power compared to a Mugen X12. I only race at the club level, and I'm looking for an engine that'll keep up with my Mugen X12 at Sun Valley's long straightaway, and thru the corners of course.

RB 5 port is a strong mill and should keep up fine with the X12. I wish I had a long straight. I have a 5 port V12 Rody sitting in my box just waiting for enough room to stretch it's legs. It's certainly more engine than I have room for locally. I run a 3 port V12 most of the time, and it seems to run as well as the Mugen X12 also. It has a little less top end than say a JP mod or some other modded 3 ports, but it's also considerably cheaper. If I were to buy the V12 3 port Rody I'm sure it would perform more like the other mods available.

Thanks for the reply. The price difference between the 3 and 5 port isn't that much actually. The 5 port sells for 249 and the 3 port I believe sells for 229, both at acehardwarehobbies. Those are the best prices I've seen so far. I'll be picking up the 5 port soon. I was just curious to know if its in the same league as a Mugen X12 or even an OS 12TZ 5 port.

Of course they are not in the same league. The OS falls way short of a Standard V12 let alone Rody!!!

Wow, the OS12TZ isnt even as fast as an RBv12? I guess that answers my question!!! I'll be gettin the RB V12 5 port soon :)

The OSTZ 3-port is a fast engine and sounds terrific when matched with the OS pipe. A few racers at my local track use them. They are both great engines at great prices. The V12 should out shine it by a little, but shouldn't be too noticable. If you picked the V12, check RB's site for their matched pipe.

See, I experienced the same thing. When I raced against guys that have OS 12TZ 3 port motors, they were able to hang with my Mugen X12 on the straight. The straightaway at my local track measures 150 ft. Pretty damn long...and if the OS 12TZ can hang with my X12, that's pretty damn impressive to me. Only engine I've seen that can smoke my X12, is an RB v15.

Still deciding on what to get...but I'm definitely leaning towards the RB V12 5 port. Since my local track hosts club races, they allow any motor to run.

If you local track allows any engine, I would say for the ultimate HP at a killer price, the OS 18 TZ is the engine. This is if your track is large enough. This engine is on par with the Rody V15 but at less than 1/2 the price.

So the OS 18TZ has as much power as an RB V15? Hmmmmm...even more? Hmmmmm... ;)

I might have to look into that. Its only 179 at towerhobbies, and they're offering a 25 dollar discount.

So I'm assuming that the Mugen MTX3 prospec drivetrain can handle this motor?

Thanks for the insight!

Actually, I was looking at the Max RPMs on the motor, and it seems somewhat low...34K max. Although, its rated at 1.8hp at 29K.

I would take the ratings with a grain of salt. Unless you are comparing ratings of one engine to the next from the same manufacturer, or from an idependent like a magazine or something. Each company uses their own environment, dyno, fuel, data collection process, etc. Some optimize them beyond realistic conditions to yield higher numbers so even though Manufacturer A says 2.5 HP @ 40 zillion RPM and Manufacturer B says 1.3HP @ 37000 RPM doesn't necessarily mean engine A is better, just better in their test. You could put engine B in the same conditions and possibly get very similar or better results. Now when EXtreme RC or RC Car Action etc. does dyno testing, they use the same dyno for every engine so you can trust that data more. Ratings are really useful if you want to say compare an OS-12CZ to and OS-12TR because they are both done by OS on thier own dyno with their own process.

Yes the MTX3 prospec can easily handle it. A higher displacement engine will generally produce more HP, but I doubt you will see the full benefit unless you drop your gear ratio to exploit it. As you noticed, RPM's are usually not higher, but the increased torque lets it put down more gear without flattening out.

I agree.

But what I'm looking for more, is an engine that can hang with my X12 or an RB V15. I know its comparing apples to oranges, but I dont have 350-400 to spend on a V15. Just looking to see if anyone has experience with other engines that can hang with these two. Right now, my max price is 249, which the RB V12 5 port fits into quite well. But if I can find a similar powered engine, for less, I'd definitely consider it.

Thanks for your insight though.

I believe the final gear on the prospec is a 58. Not sure...what gearing would you recommend?

O.S .18TZ is the best bang for the buck (hp vs price). But this engine may be too stressful to your car. Also, the fuel economy is not good. Try getting a good reliable .12 (RB, Novarossi, O.S...etc). You'll have longer running time with .12.

GFD - maybe you can just give me your RB V15 rody ;) lol j/k

Yeah, i'm still leaning towards the V12 5 port. I don't really care about having a legal engine, as a lot of the guys I run with, run outlaw motors. Plus I have my X12 to use in ROAR or other sanctioned events, where they care about motor size.

I agree with GFD about the .12 and better fuel mileage. Especially if you run longer mains at your track. I like being able to pit later than everyone else. It takes the pressure off your pit guy and makes it a lot easier to deal with pit traffic.

I think the Pro-spec will handle the horsepower, I just think it might be overkill anyway. Trust me, and RB V12 5 port will run as well as your X12 if not better. There is already enough power there. Too much power is just a waste anyway unless your track is giant and you can really use it. I couldn't begin to tell you where to gear an .18-TZ because I've never ran one before. Haven't had one on a dyno either. Gearing is subjective on every track anyway. Our track has a different layout from race to race and I sometimes have to change gearing just to accomodate that.

The track I race at is definitely HUGE. Its the largest on road track in california, according to others. Sun Valley has a long straightaway, and the turns are more of sweepers in my opinion...its setup for 1/8th scale racers, more than 1/10th scale. Very fun track to race at.

I'll most likely get the RB V12 5 port. Only thing I hate about having a turbo engine, is the damn plugs...so expensive! ;)

I have grown kind of fond of the turbo plugs. Not having to find more copper gaskets all the time is worth it to me. I have used the same plug for nearly a season on my RB V12 3 port. It still runs great. I never put a new plug in for a club race unless it is absolutely toast. For bigger races, I generally run a new plug just for insurance. If I can't afford a few glow plugs, then I probably shouldn't be racing anyway. My Tire bill is probably higher than my whole car in a season. :cry:

I hear yah about the damn foam tires. I must go thru a set after every day of racing. Pisses me off. I can definitely afford the plugs (I must have spent over 2K the past 2 months!) its just I like having spares, and the turbo plugs can add up. My X12 isn't turbo so this will be the first time I'll be using a turbo engine.

Try Ultimate Hobbies in Orange. I got my 3 port V12 for $199

Not bad! How much for a 5 port RB? I'll call them up tomorrow!

hi there.
i already tried RBv12. for me it's just a normal engine. b4 i run the engine, i checked everything the internal parts and i dont find any special mod inside it. if i not mistaken, there's 2 type of RBv12. normal n Rody version. look 4 Rody's version if power is considered. otherwise go for OStz, or sirio evo3, the hottest in the market.

So what if there is no crazy cuts or grinds. Have you seen inside a TZ yet? You wont find any there either. How quick a motor is mainly depends on the port timing. These cuts and grinds on the sleeve and crank are not the only difference between a rody and a standard V12. They also have different port timing. Also, open up any Novarossi engine and you wont find anything in there either except for a 'turbo flute' on the crankshaft which the RB also has.
+ buy any Nova or RB and you can be sure that the thing will last. The components used on these engines are second to none.

p.s. Visit the Sirio thread, and you will find some very unhappy people there. No doubt the motors are fast but they use rubbish carbs and break crankshafts very easily and frequently...

i do agree with u rody. the sirio carb is not reliable. only suitable 4 big track. what i'm trying to say is, once i bought the v12, i expect there's something new inside it compared to x12. at my place the v12 is much expensive compare to the rest(non mod engine). whta i did to my v12 is 'port n polish'. then only i feel the power of RB. my previous engine was RB Rody Roem. i love the engine especially the top end.. thanx 4 ur explaination.

I agree, the Novarossi engines are very reliable engines. I have heard the same about RB engines, which is why I am looking to buy one.

If this is the great Rody Roem, I have to say, its a pleasure talking to one of the best tuners out there. Thanks for visiting this thread.

Quick question...How does the RB V12 5 port, match up to the OS 12TZ 5 port, as far as performance? I dont mind paying the extra money to get the RB if I know for sure it'll beat an OS12TZ, or even my Mugen X12 engine.

:lol: :lol: :lol: :lol: , that is funny! Im not the real Rody Roem. I think the real Rody has a bit more manners than me and will not bag opposition engines like i do... :lol:

You can talk the the real Rody via rbproducts.com and he will personally reply to any questions you ask. Very nice guy and one of the smartest you will ever talk to.

Quick question...How does the RB V12 5 port, match up to the OS 12TZ 5 port, as far as performance? I dont mind paying the extra money to get the RB if I know for sure it'll beat an OS12TZ, or even my Mugen X12 engine.[/QUOTE]

Both are powerfull engine. If u wanna have the maximum power of V12, match up with RB Concept tuned pipe.

Snowboardgeek, where do you race? Just wondering.

Nitrodude, I race at Sun Valley. But I do work very close to your area...I work in Port Hueneme. I tried out Camarillo's race track, but felt it was too small.

Rody - My mistake :)

I should be getting that RB engine by next Tuesday. Thanks for the replies everyone. Lets keep this thread going! I dont want to limit this thread, to only my questions. RB engines from what I have heard, are right up there with Novarossi's. Lets keep the thread moving along!

Both are powerfull engine. If u wanna have the maximum power of V12, match up with RB Concept tuned pipe.[/QUOTE]

I have the OS 12TZ 5 port and it is a super fast engine. I just raced my brother's EVO 3 (3-port) in the long sweeper at Revelation yesterday, and the OS came out on top. For the price, it's hard to beat the OS 5-port. I haven't tried the RB V12 5-port as I expect it to be on par with the OS.

I have the OS 12TZ 5 port and it is a super fast engine. I just raced my brother's EVO 3 (3-port) in the long sweeper at Revelation yesterday, and the OS came out on top. For the price, it's hard to beat the OS 5-port. I haven't tried the RB V12 5-port as I expect it to be on par with the OS.[/QUOTE]

Yeah but how does that OS compare to your JP FX12?

I have an RB X12 5 port and a V12 3 port Rody. They are excellent engines and I would recommend them to anybody. I have never seen an OS engine that could run with a Novarossi based engine. I'm not saying that they can't, I've just never seen one.

My JP is not fully broken-in yet, so it's still slow. To my surprise, my OS TZ 5-port is one of the fastest engine on my track. My EVO 2 5-port or previous EVO 3-port are about 10-15% behind in power. OS did a great job with this engine. Honestly, I'll be happy if my JP after break-in can keep up. It is that fast!

Yeah but how does that OS compare to your JP FX12?

I have an RB X12 5 port and a V12 3 port Rody. They are excellent engines and I would recommend them to anybody. I have never seen an OS engine that could run with a Novarossi based engine. I'm not saying that they can't, I've just never seen one.[/QUOTE]

How would you compare the RB X12 5-port with the V12 3-port Rody?

The V12 3 port rody is stronger. Primarily because the V12 series in general is better than the X12 series RB mills. Rody know how to mod an engine and I am definitely impressed with the Rody mods. Some of the other top mod guys do just as good of work. The JP mods done by Richie are hot and so are the Hottinger engines. I can get RB support here local though so I am kind of fond of RB engines.

The Mario Rossi Rex engines are very good also!

How would you compare the RB X12 5-port with the V12 3-port Rody?[/QUOTE]

I have never ran them in the same car. My X12 is modded and it runs very good. I would guess they are similar on the top end but the Rody may have a little more bottom end. We are not allowed to run 5 port engines here so I used to run the X12 in my stadium truck just for fun. Bad idea... it spent alot of time on the roof. It is a very fast engine.

anyone knows a good place to get RB engines? I prefer USA shops. thx.

acehardwarehobbies.com

I have been running an OS.12TZ 5 port. This weekend I'll be testing an RB.12 X12 Rody. Are these normally a 3 or 5 port? Or did they make both? I was thinking about gearing the RB the same as the OS. Does that sound like a good idea?