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RE: Official HPI MT2 Thread - 10/19/2005 6:43 AM   
friday13


 

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RE: Official HPI MT2 Thread - 10/19/2005 8:14 AM   
MT 2 in Ca.


 

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Status: offline 		Montrealer,

Could you post a picture of the other side. I want to look at the carbon fiber upper deck, and the venom temp. gauge. If you don't mind. I just may want to BITE your Style !!!

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RE: Official HPI MT2 Thread - 10/19/2005 2:13 PM   
montrealer



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< Message edited by montrealer -- 10/19/2005 2:24 PM >

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RE: Official HPI MT2 Thread - 10/19/2005 2:54 PM   
montrealer



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RE: Official HPI MT2 Thread - 10/19/2005 6:58 PM   
46u



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Status: offline 		Why carbon fiber pipes are not a good idea.
http://www.fantomracing.com/
Go to the page on pipes and you will see why carbon fiber pipes are not the best way to go. I cut and pasted the most important part. YOU NEED THE HEAT.

Our pipes are made out of steel. Why? …glad you asked. First, steel resonates better than aluminum, which makes the pressure pulses in the pipe stronger, providing for a better “supercharging” effect of the gases being forced back into the combustion chamber. Next, and most important, steel holds the heat in a pipe better than aluminum does. A hotter pipe is more effective in the scavenging process that a 2-cycle engine goes through, or in simple terms, a hotter pipe helps an engine burn fuel more efficiently, ultimately providing you with more horsepower and better fuel mileage. This is the reason carbon fiber pipes have never worked; they just don't get hot enough, as carbon fiber is not a good heat insulator. Another example of steel pipes being used in 2-cycle applications is in motorcycle racing. Factory motocross teams have access to any material they want, including carbon fiber and aluminum, but they always use steel, because it is the best material for making 2-cycle engine pipes. Finally, a steel pipe flat out sounds better than an aluminum pipe. They are more “throaty” and raspier, not to mention their unique factory look and durability sets them apart from all other pipes. If you are concerned about the weight, our pipes only way fractions more than their aluminum counterparts, and in our testing we have found no disadvantage from using a steel pipe versus an aluminum one.

< Message edited by 46u -- 10/19/2005 7:03 PM >

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RE: Official HPI MT2 Thread - 10/19/2005 7:16 PM   
montrealer



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Status: offline 		I guess here it's gonna be the word of one company against the other. Just like the asphalt makers versus the concrete makers battling for the pavement market or the nuclear industry trying to grab parts of the hydro electricity market.

The question I have is if I was satisfied with the performance of the stock plastic pipe provided with my kit, that does'nt get hot at all, wouldn't a carbon pipe with a proper shape and better heat conductivity properties be a better choice.

Anyways, I'll let you know how the truck reacts when I try it. That'll be the REAL test. No marketing here.

M.

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RE: Official HPI MT2 Thread - 10/19/2005 7:31 PM   
kihei11


 

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Status: offline 		I Have agree with 46u concerning steel pipe as a superior material and the resonance aka sound waves, for the pipe. I can site this as my son and I have this on going competition Between My evader,-.18cvr 56t spur and his rustler with a used t-maxx .15 pro motor. He had a stock pipe on it before and I'd routinly beat him in a drag race, I put an evader steel pipe on it and now he blows my doors off. I replaced my pipe on my t-maxx with a trx aluminum pipe and enjoyed better performance than the stock pipe, then out of couriosity put evader steel pipe on and wo consistant performance. Great observations 46u. I didn't realize what had cause performance increase till I read you explaination, I thought it was better flow, but it was sound and heat pulse.

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RE: Official HPI MT2 Thread - 10/19/2005 7:49 PM   
montrealer



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I'm no engineer or physicist but I would be lead to think that a material that isolates the heat inside the chamber (carbon, plastic) would keep the exhaust gases hotter rather than if it dissipates the heat like a metal pipe would. Doesn't a metal pipe act as a large heatsink ?.

Also, the first reason why I chose this material over metal is that I once flipped a buggy that was belly up on the track one day and I got a nasty burn on three fingers because I touched the pipe. Second reason is because of looks and uniqueness; I just don't want to get bored with this truck ever. Third reason is because if they say it can be done because it's never been done before it may just be because it wasn't done properly. With human creativity, nothing is impossible.

Anyways, like I said, it's risk I'm much willing to take.

< Message edited by montrealer -- 10/19/2005 7:55 PM >

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RE: Official HPI MT2 Thread - 10/19/2005 10:38 PM   
CS MT2


 

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Status: offline 		Actually, the carbon or plastic pipes won't isolate the heat as well because they do not absorb the heat as much as steel and will also cool much faster than the steel. For example, if the sun has been shining all day, around sunset, go and touch some plastic on a vehicle, then the metal. The metal will be warmer because it retains heat better. Needless to say, the hot exhaust gases will exit the pipe and not be trapped inside, it is the heat from the steel that is keeping it warm in there as compared to a plastic or carbon fiber pipe.

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RE: Official HPI MT2 Thread - 10/19/2005 11:11 PM   
46u



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Status: offline 		Like I always say run what makes you happy. If you do more research not only on the little engines we run but all so on full size two cycles you will see most feel the same about the materiels use for and exhaust.

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RE: Official HPI MT2 Thread - 10/19/2005 11:40 PM   
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Status: offline 		with all this chit chat about pipes. where can i find ones made of steel? so far everything i've found is aluminum

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RE: Official HPI MT2 Thread - 10/20/2005 12:27 AM   
montrealer



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Status: offline 		Well I'm back home (couldn't wait) and I started my engine without being able to run the truck in the street cause it rains like hell. The sound is defintly different, much deeper and closer to a real size truck than the motorcycle whine of a nitro RC car. I let it run for a while and the pipe does get a lot warmer than the stock plastic pipe (couln't touch it) so I guess it's good. I'll give you guys a full report once I actually get the chance to le the truck roll.

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RE: Official HPI MT2 Thread - 10/20/2005 5:30 AM   
f150dan


 

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Status: offline 		I'm so mad (and sad) because none of the parts I ordered from the LHS come in today. I was looking foward to installing some new stuff. It's kinda like Christmas every time I order something, haha I'm always so excited for the stuff to get here.

Maybe tomorrow. I really can't wait to get my new hex adaptors so I can run those dish wheels.

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RE: Official HPI MT2 Thread - 10/20/2005 5:32 AM   
f150dan


 

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Status: offline 		montrealer, if your happy with the look, sound, and performance of your new pipe, thats all that matters. I really does look cool as **** on there mang.


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RE: Official HPI MT2 Thread - 10/20/2005 6:14 AM   
montrealer



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Status: offline 		Yeah thanks.

I just wish I could compare with a similar truck side by side. Not to be right or better but just to know...

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RE: Official HPI MT2 Thread - 10/20/2005 6:56 AM   
f150dan


 

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RE: Official HPI MT2 Thread - 10/20/2005 8:17 AM   
Joebaby35



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Status: offline 		No matter what pipe you got it will be better than the stock pipe no doubt about it. There is no comparison between plastic and Carbon fiber. 2-stroke engines exhaust pipe have more to do with the way it is shaped then what it is made of. Yes the metal pipe will work better but the difference is so minimal you would never know unless you have very expensive equipment to test it with and even still is not real data that will match the way it performs on the road.

2-stroke pipes have more to do with how rigid the material is and the shape of the pipe. That is why a steal pipe is thought to be better then an aluminum pipe, but most everyone runs aluminum pipes instead of steal pipes. The shape and how rigid the pipe is will enhance the wav inside that is created when the spent gases are exiting. The wav goes back and forth inside the pipe so fast and with so much force that it actually goes all the way back into the engine and forces the piston back down which aids in getting the RPMs to get up so high (40 +RPMs). I read many articles about this on RC Nitro cars and 2 stroke dirt bike and Jet Ski engines (which I am also into) exhaust pipes. I don't claim to be an expert but I have a good understanding about this stuff and how it works.

Never listen to someone who will tell you it is not good you could have gotten better. That kind of advice comes from the KNOW IT ALL people in this world who try and put you down to make themselves feel better. I think the pipe looks really nice and I am sure it will perform well, so don't listen to anyone and enjoy the ride.

I heard from a guy at the track who had bought a carbon fiber pipe when they first got popular, that his truck ran the same with the new pipe as it did with his old racing exhaust pipe. But it cost way too much money just for the Bling factor when performance remained the same.

I don’t mean to piss off anyone but it sucks when you get something new and someone’s got to make you feel you did the wrong thing.

< Message edited by Joebaby35 -- 10/20/2005 8:20 AM >

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RE: Official HPI MT2 Thread - 10/20/2005 8:26 AM   
MT 2 in Ca.


 

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Status: offline 		Montrealer- "Biting " means (in the "80's") COPYING your Style! ""Wicked Truck!!!""

f150dan- I know what you mean!!! Going to my LHS is being a "Kid in a CandyShop!" Hopefully it'll
be Christmas for me tomorrow. Since I ordered Parts too!!

Kihei11 - "Howzit!!" Born in Hawaii! Mahalo!

I'm very happy to get all this information ,since i'm a "Newbie", I've been buying magazines ,but I never get the kind of information that you have conversed here!!!
Again "Thank You!!!

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RE: Official HPI MT2 Thread - 10/20/2005 8:41 AM   
46u



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Status: offline 		Just in case some did not see it in my other posts I ALWAYS SAY RUN WHAT EVER MAKES YOU HAPPY! Every one has a right to there own opinion and that is what a form is all about or at least that is what I thought. I never said I know it all and if I did I would not come to this form. I agree there are a lot that think they do and even if they buy junk will tell you it is the best thing since sliced bread. I agree some will look at a blue sky and try to convince you it is red just like they try to argue with fact. If you want to know more about pipes do not take any ones word for it do a search on the net and make up your own mind if you can think for your self.

< Message edited by 46u -- 10/20/2005 8:43 AM >

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RE: Official HPI MT2 Thread - 10/20/2005 9:42 AM   
MT 2 in Ca.


 

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Status: offline 		Man!! I was gonna ask about TSAIS.COM They have that pipe with the side pipe. "Oh Well".

Can I ask...why do some "coil" their fuel line? I was wondering if it was a gravitational pull or it had to be a certain length? Just curious.

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RE: Official HPI MT2 Thread - 10/20/2005 2:58 PM   
montrealer



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Status: offline 		Thanks Joebaby and 46u.

Don't worry guys, I'm not mad or disappointed. This subject just makes me curious like hell. I suspect like Joebaby said that I wont notice anything different unless I run my engine through the dynamometer test but; 1- I don't have a dynamometer and 2- Where on earth am I gonna find a dynamomter anyway???. I read this good article on pipes in RC Cars or XRC cars magazine (can't remember which one) and they too, after testing about 20 pipes, say the main difference is not material but rather the shape that will influence the powerbands.

Thanks MT 2 in Ca.

There you go, this just betrays my origin as I am what they call a french canadian (Quebec). In the 80's I was just struggling to communicate with the few anglophones kids in the neighbourhood, now I'm 39 and I kinda get the expressions but only the newer ones. That's why I also use weird sentences sometimes that you guys could probably cut in half most of the time

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RE: Official HPI MT2 Thread - 10/20/2005 3:01 PM   
montrealer



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Status: offline 		The reason why people "coil" their fuel lines or leave longer than needed lines is because you have this extra fuel in the line that may help you run a few seconds more during a race if your tank is empty. Fuel tanks in ROAR races have a maximum capacity depending on classes, this is a little trick racers have schemed over the years.
quote:

ORIGINAL: MT 2 in Ca.

Man!! I was gonna ask about TSAIS.COM They have that pipe with the side pipe. "Oh Well".

Can I ask...why do some "coil" their fuel line? I was wondering if it was a gravitational pull or it had to be a certain length? Just curious.



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RE: Official HPI MT2 Thread - 10/20/2005 6:03 PM   
46u



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Status: offline 		If you are really looking for a dyno do a search on this site as well as the net and you will find them but they are not cheap.

All so when it comes to an item just check and see how many race teams run it. I would think if an item were all that good every one would run it. Just my opinion and I am only 51.

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RE: Official HPI MT2 Thread - 10/20/2005 9:13 PM   
montrealer



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quote:

ORIGINAL: 46u

I would think if an item were all that good every one would run it. Just my opinion and I am only 51.


Or maybe they all just hate the color or something? I just don't care. I say maybe we should close the subject of the carbon pipe as it is now a question, I guess, of who's gonna have the last word. If everyone did what everyone else do because it was the best (or only) solution at the moment, we'd all be hunting lizards with rocks and running around with a leopard skin weenie cloths while that crazy looking guy, using a lance would be eating turkey and potatoes alone in his corner listening to the other knowledgeable guy's jokes and chat emanating from next door's cavern while they try removing scales and gravel between their teeth with a dirty stick after their slimmy raw lunch (uhhh, this illustration may be a bit overdone...)

Please wait, i'll gladly tell you if carbon sucks, or maybe it's going to be a total revelation and I'll be interviewed in next month's People magazine as the visionnary single buyer of Vantage's ridiculous cold as ice non-resonating dud carbon pipe that everyone else rejected because Tebo didn't use one. If it sucks, I promise I'll post a picture of myself wearing only this pipe (and winter's comming) running around the block as punishment for not listening to post-purchase opinions (maybe not ... ).

About the dyno, it's just like a stationnary bike for nitro racers so it's no fun. I don't plan on buying one (unless it's in carbon and I'm the only one) but thanks for the tip.

thanks

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RE: Official HPI MT2 Thread - 10/20/2005 10:23 PM   
ppereira007


 

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Status: offline 		thanks montrealer, i needed a good laugh this morning

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