tommythecat

My Feedback: (2)

You are kidding aren't you? I love my 2.5r but there is no way on earth that this mill is pushing anywhere near 1.9 horses at any RPM. I have not run a 3.3 so I will refrane from commenting on them. I can tell you that a .18 TM is a great motor. I also like the traxxas mills, I have had insanely good luck across several 2.5's and a 2.5r, so I'm not just some traxxas hater...

The 3.3 conrod problems I've heard about do scare me a bit, but aside from some initial manufacturing defects I'm sure they must be awesome. Especially considering how many people I've heard singing their praises (given how much people like to bash traxxas products anytime they can find an excuse.

art_vandalay

Here's another link to a dyno Test from Xtreme RC Cars Magazine. [link=http://www.rc411.com/forum/showthread.php?t=2202&page=1&pp=10]This is a post from the Executive Editor[/link]

DaveG55

Yeah, that's the same list I posted. Too bad it hasn't been updated in a while but, as the EE said in the post, they want you to buy their magazine.

art_vandalay

I just think it's a shame how manufacturers have led people to believe that their little nitro engine the size of an apple is as powerfull as a riding lawnmower! I guess marketing doesn't have any real morals. It's exactly like computers..... "Hey buy our computer with a 800gb hard drive!! Its ten times as fast as a computer with a 80gb hard drive!!" They sell numbers.......... not performance.

tommythecat

My Feedback: (2)

OMG It's Art Vandalay!!! Are you still in the import/export business?

Steve455400

My Feedback: (11)

here it is in a magazine 2.5= 1.33HP , 2.5R= 1.9HP and 3.3 hasn't been tested

tommythecat

My Feedback: (2)

I would have a realy hard time believeing any magazine that try to claim that a 2.5 R has 23% more horsepower than a standard trx 2.5. Having owned several 2.5's and a perfectly tuned perfectly running 2.5, I would have to guess that those numbers are completely bogus regardless of the source. I may be wrong, I have been before, but I would have to witness the dyno testing first hand (and verify the methods) before I would accept numbers like that withou calling shenanigans...

Steve455400

My Feedback: (11)

well I read these number's in 2 different magazines and I did research and it was the same so I believe it's true so the 2.5R is acually stronger then the O.S .18 TM but personally I think the TRX 3.3 racing engine is pretty much one of the stongest high reving engine you can buy so far. I'm not against O.S engines or anything but I always hear O.S fans saying how traxxas engines are no good but it's not true cause I own 2 t-maxx 3.3's and they run good and I had them now for 8 months and I run them like I stole them and I have a Nitro 4 tec and I have a 2.5R and it holds a good tune and runs realy good so I think it's all in the tunning's and fuel and glow plugs in were you get maximum performance I use all traxxas stuff on my motor.

MaD_MaxX

I don't know about the US but here in E where I live I can get the RB TM323 for less money than the OS. That's why this engine is going into my Maxx although I also like the O.S. very much. I would say think about the orange one too before you make your decision

DaveG55

You can believe what you want I suppose but there's no way I believe a 2.5r is making almost 2 hp.
I can tell you from personal experence though that neither the 2.5 or the 2.5r can touch an OS .18 TM. I've got all three and the 2,5's just cannot do it. I haven't got my hands on a 3.3 yet so I won't comment on that but I'd sure be willing to put my TM powered Revo up against any 2.5 Revo and I think that it'd probably be a very close contest against a 3.3.
And for the record, I've got engines from half a dozen different manufacturers (including 3 Traxxas engines) and don't have a particular problem with any of them. Each engine has it's own pecularities but that's just the nature of nitro rc engines.

slayerphonics

lol 2.5 traxxas motor stronger then an OS .18tm? not a chance..

art_vandalay

tommythecat - Yes I'm in the import/export business still!

I own the trx 2.5r, OS18tm and the trx 3.3 . Yes, the 3.3 is definately faster than the 2.5r, but it still is not as quick as the OS 18tm. I will tell you that it is close, and I could easily see how tuning could make the difference between the two. I also think that you can't trust dyno numbers unless the results you are compairing have been done on the same dyno by the same engine tuners in the same environment. So, compairing results from two different sources is pretty worthless for RC engines. Hope that helps a little.

art_vandalay

Steve Losi - Have you ever owned any engines other than the 3.3?

DaveG55

Exactly, if you cannot duplicate the conditions as closely as possable then your results have zero credence.
I could set up a dyno in my basement and post the results and pretty much say anything I want and I guarentee that someone would quote me and repeat it as gospel..as long as the conclusions agree with what their preconcieved notions were. Otherwise they'd be calling me a liar Either way the results would be worthless when comparing engines tested on any other machine. That's what makes the list I posted previously at least reasonably believeable. All the engines are at least done on the same machine by the same group of people. Untill there are some sort of agreed to standards for dyno testing that's about as good as it willl get.

maliblu

I am leaning towards the O.S motor. what pipe should I get to go with that motor?

art_vandalay

THS pipes seem to be okay.....

Steve455400

My Feedback: (11)

I've owned O.S engines,Traxxas engines and I like them both but I have a t-maxx 3.3 and I personally think that it will beat an O.S .18TM I think that the reason why everyone thinks that a O.S .18TM is faster cause the person with the 3.3 either didn't have it tuned right or they weren't using the right fuel and glow plug set up. but you put a stock O.S .18TM up against my t-maxx 3.3 I gurantee I'll eat it up for diner! now I'm not saying I have the fastest t-maxx or anything cause I know for a fact that there are faster engines and t-maxx's but a 3.3= .20 50,000 Rpm's Vs O.S .18TM .18=40,000 3.3= faster and stronger yea the O.S .18TM might be faster then a 2.5 or 2.5R but not the 3.3

dcs161616

Why would you put in a .18 when u can get put a .28 in the revo 3.3. The .28 may not pull 40,000 rpms but it has mad torque. All you have to do is change the gearing to get the topspeed back up to normal. Also I just bought a revo 3.3 and broke it in today. It is very fast and will beat a friends .26 savage w/ 3-speed.

Freezetron

Because you also have to purchase a big block adapter kit, and I don't feel like doing that.

DaveG55

Ya know steve, you'ld be a whole lot more belivable if you'd quit with the unsubstantiated claims.
First you post up HP numbers that you cannot back up and now you're posting some totally off-the-wall rpm figures. First off the TM has a practical rpm of 3k to 29k, not 40k. And second, where did you invent that figure of 50k rpm for the 3.3? Traxxas does NOT publish the rpm or power specs for their engines. Those numbers are not on Traxxas' website or anywhere that the engines are sold. Which tells me that your either inventing numbers yourself or repeating something you've been told but cannot substantiate.
There's no way on God's green earth that the 3.3 makes 50,000rpm, period. Traxxas does not even try to make people believe that! And while they do not post exact rpm numbers they do publish a chart comparing the 3.3 to the 2.5 and it appears that the 3.3 makes it's peak power at just over 30k rpm - remarkably close to the TM's 29,000 - and nowhere near the 50k you're trying to make people believe.
[link=http://www.traxxas.com/products/nitro/trx33/trx_trx33.htm]Traxxas power/rpm chart.[/link]

Steve455400

My Feedback: (11)

well DaveG55 if you think I'm lieing about all this why don't you call traxxas them selves and ask them. I'm not making anything up and I'm not talking about how much RPM's they can push in the car/truck them selves I'm saying how much rpm"s they push on a engine dyno. cause now if you have it in a car/truck then yea there's no way on hell it's going to push 50,000 and yes the O.S .18 on a dyno will push 40,000 but in car/truck no.

art_vandalay

Engine dyno's actually have to put a load on the engine to simulate the environment in a car, because we all know that a motor at WOT with no load will die a horrible death [X(]. I've heard (not witnessed) of motors launching rods out of the block at less than 40k rpm's. I on the other hand believe that the Traxxas motor could hit 50k rpms............ IF IT WERE NITROUS INJECTED ON 50% NITRO @ WOT WITH NO LOAD ON THE CRANK!!! then it to would die a horrible death though.

It's really funny....I'm totally remided of when I use to sell car audio equipment. Low end manufacturers would always make the craziest claims on power output. Clarion was great about this, they had an amp they said was a 600 watt amp. Yet the amp was only fused up to 20 amps, which at very best would allow it to pull only 288 watts (14.4v * 20 amps=288 watts). So we at the shop came up with the term ILS POWER. ILS stands for "If lightning strikes". So, if lightning stuck the amp while it was in your car it was possible for it to do what the manufacturer claimed .

The TRX 3.3's 2+ HP @ 50k rpms must be its ILS power rating!! Maybe they need to come up with the RC equivalent of ILS.........like NIWOTNL (Nitrous Injected Wide Open Throttle No Load).

Beasley1

ILS lol [sm=drowning.gif]

DaveG55

Then post your so called dyno info. You cannot do it because nothing exists supporting your claims. Your obvious lack of koweledge and insistance on posting unsubstantiated claims is making you look immature and impossable to believe.

Steve455400

My Feedback: (11)

here you are DaveG55 I copied it from traxxas's website

The quality and smoothness of an engine's ball bearings contribute to the life and performance of the engine. The TRX 3.3 uses only top-grade, ultra-high performance, large diameter ball bearings. Top quality bearings improve power by reducing parasitic friction. The rear engine bearing uses a high-tech composite cage for reliable operation at engine speeds that approach 50,000rpm!

Notice it say's engine speeds that approach 50,000 Rpm's!!!