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RE: Holy S**t - 3/10/2007 3:11 AM   
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RE: Holy S**t - 3/10/2007 3:16 AM   
ehroof


 

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RE: Holy S**t - 3/10/2007 6:20 AM   
slide150


 

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Status: offline 		what the guys are saying is right they are worthless for the 2 stroke i know this from my experience from 2 stroke motorcycles the compression in a 2 stroke isnt enough to handle a supercharger a 2 sroke works better off of the porting and piston size thats just my .02 worth

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RE: Holy S**t - 3/10/2007 6:50 AM   
arlo1


 

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Status: offline 		I have my facts right I work on two and four strokes for a living. YOU NEED TO GET YOUR FACTS RIGHT! A nitro engine is a two stroke by two strokes they meen it strokes the piston 2 times per power cycle. As the piston goes up it compresess the air and fuel above it WHICH IS A COMPRESION STROKE, WHICH HAPPENS EVERY TIME THE PISTON GOES UP! and at the same time it is pulling in air/fuel under neath the piston through the carb then the crank in our case, then when the fuel ignites above the piston the piston is pushed down WHICH IS THE POWER STROKE, and at the same time the port the carb above of closes because the crank spins, and the air fuel under the piston is compressed a little till the ports in the side of the cylinder are uncovered and the fresh air fuel flows from underneathe the piston to above it which pushes the burnt mixture out this is why two strokes including nitro buggy engines ect. use tuned pipes and make more power from certain pipes because the pipe uses the pulse to help stop the fresh air fuel from exiting the cylinder out the exhauste port. SO THERE FOR A NITRO ENGINE WHICH IS A TWO STROKE HAS TWO STROKES ONE IS COMPRESION AND THE OTHER IS THE POWER STROKE! If your engine had no compresion it would not start! A four stroke uses four strokes of the piston to do all of this this is why ama rules alow four strokes to be 450 cc in the 250 class because the two strokes have twice as many power strokes per crankshaft revalution
quote:

ORIGINAL: ehroof

2 stroke=ignition/exhaust you need to get your facts straight, a nitro does not hava a compression stroke. it pulls fuel and ignites on the same stroke then exhausts on the other stoke, the compression and ignition are on the same stroke.



< Message edited by arlo1 -- 3/10/2007 6:56 AM >

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RE: Holy S**t - 3/10/2007 6:55 AM   
ehroof


 

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Status: offline 		lol. whatever, all i know is that they DO NOT WORK on a nitro engine, they just look good. if you read what i said, i think it was the same as you said, just shorter.

< Message edited by ehroof -- 3/10/2007 6:56 AM >

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RE: Holy S**t - 3/10/2007 6:58 AM   
arlo1


 

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Status: offline 		NOT EVEN CLOSE AT ALL YOU ARE COMPLEATLY WRONG! I SAID TURBOS AND SUPERCHARGERS DO WORK AND NITRO ENGINES DO HAVE COMPRESION YOU ARGUED AGAINST THE TRUTH!
quote:

ORIGINAL: ehroof

lol. whatever, all i know is that they DO NOT WORK on a nitro engine, they just look good. if you read what i said, i think it was the same as you said, just shorter.



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RE: Holy S**t - 3/10/2007 7:00 AM   
ehroof


 

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Status: offline 		oh, sorry, you said they do work so they must, i was refering to the compression/igniton stroke and exhaust stroke on a 2 stroke engine. read what i said again.

< Message edited by ehroof -- 3/10/2007 7:01 AM >

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RE: Holy S**t - 3/10/2007 7:04 AM   
arlo1


 

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Status: offline 		Nitro engines use ignition it is called a glow plug. I and many other people in this world have seen and used forced induction on two and four stroke and it does work! Just think of this your engine makes power by burning air and fuel, if you force more air and fuel in guess what happens! More power! Someone else with some knoledge, back me up here!
quote:

ORIGINAL: ehroof

oh, sorry, you said they do work so they must, i was refering to the compression/igniton stroke and exhaust stroke on a 2 stroke engine.



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RE: Holy S**t - 3/10/2007 7:06 AM   
ehroof


 

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Status: offline 		works excellent on a 4 stroke, not so great on a 2 stroke, by the way i know all about the glow plug deal, lol.

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RE: Holy S**t - 3/10/2007 7:09 AM   
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Status: offline 		If you are admiting they do work on two strokes but better on fourstrokes I agree. They work on boath but better on fourstrokes. Still make alot more power on boath.
quote:

ORIGINAL: ehroof

works excellent on a 4 stroke, not so great on a 2 stroke, by the way i know all about the glow plug deal, lol.



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RE: Holy S**t - 3/10/2007 7:11 AM   
ehroof


 

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Status: offline 		type in supercharger in the search above and read the comments about it. i am not going to argue about it, do some research on it before you start shooting off.

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RE: Holy S**t - 3/10/2007 7:28 AM   
arlo1


 

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Status: offline 		I have done my research I worked in a dynojet dyno shop for 4 years and am a licenced motorcycle mechanic of 5 years ten in the trade. I got honers and asked to teach the program! You force more air and fuel into a engine and it makes more power it is a simple concept. To top it all off "superchargers" came from old 2 stroke diesel engines in the begining like the 6-71 jimmi I have in my garage for my 440!
quote:

ORIGINAL: ehroof

type in supercharger in the search above and read the comments about it. i am not going to argue about it, do some research on it before you start shooting off.



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RE: Holy S**t - 3/10/2007 7:32 AM   
ehroof


 

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Status: offline 		very well, but they dont work on nitro engines, i am not arguing about automobile engines, i am talking about nitro rc engines, do a search on this site and see what people have to say about it, i did my research on it, thats why i dont have one, i am not responding to this anymore, its seems pointless, you will keep telling me about supercargers on 440's and other automobiles.

in case anyone else would like some research on the subject, i think the first 2 threads say it all, but what do i know??

http://www.rcuniverse.com/forum/searchpro.asp?phrase=supercharger&fuzzyMatch=on&author=&forumid=ALL&topicreply=combined&message=subject&timeframe=%3E&timefilter=0&language=single&top=500&criteria=AND&minRank=0&sortMethod=d&submitbutton=+OK+

< Message edited by ehroof -- 3/10/2007 7:39 AM >

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RE: Holy S**t - 3/10/2007 7:35 AM   
arlo1


 

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Status: offline 		700cc yamaha triple is a 2stroke sled engine not an automobile. The only difference between a two stroke sled engine and a nitro two stroke, is the fuel and the glow plug it still uses the same princeables of operation!

< Message edited by arlo1 -- 3/10/2007 7:39 AM >

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RE: Holy S**t - 3/10/2007 7:35 AM   
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Status: offline 		arlo1 is right on the money, as far as the mechanical workings of the 2 stroke! Now if it works better with or with out a blower/compressor/turbo I have not tried. Now in theory it should make more power with a turbo. It is the same idea as a motor will make more power at lower elevation than higher elevations because at lower elevations the air is more compressed. If I were to say that a turbo would not work on a 2 stroke I would almost be saying that a 2 stroke would not work at lower elevations! Lower elevations=higher air density.

< Message edited by RoadBurner -- 3/10/2007 7:36 AM >

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RE: Holy S**t - 3/10/2007 7:36 AM   
arlo1


 

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Thank you very much!

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RE: Holy S**t - 3/10/2007 7:43 AM   
ehroof


 

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Status: offline 		roadburner, i am not saying a turbo/supercharger does not work, it just does not work on a nitro engine, and no where near as good on a 2 stroke engine as it does on a 4 stroke engine. i agree with how the 2 stroke engine works, i just said it in alot less words.

take a read: http://www.rcuniverse.com/forum/searchpro.asp?phrase=supercharger&fuzzyMatch=on&author=&forumid=ALL&topicreply=combined&message=subject&timeframe=%3E&timefilter=0&language=single&top=500&criteria=AND&minRank=0&sortMethod=d&submitbutton=+OK+

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RE: Holy S**t - 3/10/2007 7:45 AM   
arlo1


 

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Status: offline 		these engines are two strokes that is what we are saying!
quote:

ORIGINAL: ehroof

roadburner, i am not saying a turbo/supercharger does not work, it just does not work on a nitro engine, and no where near as good on a 2 stroke engine as it does on a 4 stroke engine. i agree with how the 2 stroke engine works, i just said it in alot less words.

take a read: http://www.rcuniverse.com/forum/searchpro.asp?phrase=supercharger&fuzzyMatch=on&author=&forumid=ALL&topicreply=combined&message=subject&timeframe=%3E&timefilter=0&language=single&top=500&criteria=AND&minRank=0&sortMethod=d&submitbutton=+OK+



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RE: Holy S**t - 3/10/2007 7:46 AM   
arlo1


 

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Status: offline 		just because you read it one the internet on a forum it must be true right? I have used them in real life they work.

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RE: Holy S**t - 3/10/2007 7:47 AM   
arlo1


 

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Status: offline 		http://www.rcuniverse.com/forum/m_4297256/anchors_4297256/mpage_1/key_supercharger/anchor/tm.htm#4297256 read this one!

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RE: Holy S**t - 3/10/2007 7:53 AM   
RoadBurner



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Status: offline 		I just thought about something.....If you induce more air and fuel into a 2 stroke motor that has a tuned pipe (especially a RC small scale pipe) you might be pass a threshold of the tune pipe. In other words the tuned pipe might not work properly as the dynamics will change with more fuel and air. It makes sense that this window of operation might decrease with a decrease in scale. Just a thought though!!!

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RE: Holy S**t - 3/10/2007 7:54 AM   
arlo1


 

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Status: offline adamshowtime, hello.
First time to the forum, I'm the owner of the blue skyline with twin supercharger s w/ intercooler, these pictures were submitted to HPI website. (Previously was a single supercharger on the supra) Please note that the supercharger is a research mark-up for R/C product development. the SC that you saw was hand-crafted. meaning less precision and tolerance on the casing, tubine and shaft. I have tested them up to 20,000 rpm. the SC itself does not boost pressure but increase a lot of CFM. the intercooler was spreaded with CO2 to lower the intake temp. the A/F ratio need to adjust to a slightly richer setting....

Bottom line: the Supercharger does help but not a lot on a 2-stroke engine. I have seen a big improvement at the top end (where CFM is at its highest level) but at low end, it is just almost inpossible to tune without pressure regulator.

Keep your eyes out on the hpiracing.com gallery. I will be posting new pictures for my RUF porsche with rear mounted intercooler and lancer EVO V. Both supercharged and intercooled. I'm also working a chassis dyno bench. it will read Hp, engine speed and wheel speed.

Any one interested in my development, please email me taoarcdesign@aol.com

PS. the supercharger is a registered design.
This is the guy who owns the car you are arguing about!

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RE: Holy S**t - 3/10/2007 7:56 AM   
arlo1


 

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Status: offline 		It is true you might need a different pipe to make the most of the new way the engine is working.

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RE: Holy S**t - 3/10/2007 8:01 AM   
ehroof


 

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Status: offline 		read the other 500, lol, bro i am done with this, it doesnt work on a nitro, i am sorry , it does work, it gives you a 3% gain in power, wow, definately worth the $150+. LOL. Much better than a tuned pipe or higher nitro fuel. I did the research the end of last summer, i was going to put one on my hpi rs4, i started to do the research, not just on this forum but on the rest of the internet, for every person who had said something good, about 1,000 said something bad, not to mention the guys at my lhs. buy it, put it on your car and you can race your snowmobiles and 440. i see you said you used one and it works, you used it on your nitro? you have pictures?? if not, how can you say it works, if you read 98% of the information on them, you will read they dont work.

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RE: Holy S**t - 3/10/2007 8:07 AM   
ehroof


 

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quote:

ORIGINAL: RoadBurner

I just thought about something.....If you induce more air and fuel into a 2 stroke motor that has a tuned pipe (especially a RC small scale pipe) you might be pass a threshold of the tune pipe. In other words the tuned pipe might not work properly as the dynamics will change with more fuel and air. It makes sense that this window of operation might decrease with a decrease in scale. Just a thought though!!!


one of the arguments is that since the exhaust and intake are open at the same time on an rc engine the superchager will not be able to make any pressure, it will just push fuel and air out the exhaust making the tuned pipe not work properly, also will add more air to the mix and you will have to compensate with more fuel because it is running leaner, cancelling out the effects of the supercharger. supercharged 2 strokes on a bike or snowmobile use a different carb set up with a reed valve that will stop what i was saying above, its a little different of an intake system that is on our nitro engines, or the newer models would be fuel injected.

< Message edited by ehroof -- 3/10/2007 8:09 AM >

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