i have the rbinnovations supercharger installed in my ofna lutra lx pro and it works great. if you dont believe me or you want to talk more about it email me i have pics too. [email protected]

is it with the stock force??.....show us a video cause im curious to see one with the supercharger

This design is too complex for the application. Making the engine richer to lean it out again makes no sense, it's the sam net result as running it lean to begin with! How do you even get the thing to idle correctly? First good roll over and there goes your $130. Nice idea though.

In an honest opinion from someone who has owned an awful lot of forced induction cars, the concept of super or turbo charged two strokes it prectically impossible. You cannot pressurize something without a sealed combustion chamber, end of story. All the air you are feeding in is just going right out the exhaust port because air will take the path of least resistence. A 4 stroke engine, yeah, it could work but for proper fuel managment, there is no room for a rising rate fuel pressure regulator on an RC vehicle. Use the search as was stated before. I myself have typed more than one very lengthy explainations of why no power adder will or can work. Its simply not possible. Use that 180 bucks to buy a better engine, you will be much happier.

Here is the picture of one with supercharger:

It will not work the engine is to small. It might be possible, it is most likly very possible but the cost will be tremendous. I was reading about it on a forum at http://hpiracing.com/ this is what one of the hpi staff had to say. "There are serious limitations on how much forced induction can be accomplished with a conventional 2 stroke engine. Even if it were possible, it would be extremely expensive due to the precision and complexity of forced induction."

what you would have to do is raise the intake port above the exhaust and add a reed valve too keep from flowing through the carb then u would need it to make a pulley that would overdrive to keep up with the motor after port the engine polish it and ull make serious serious power if some one does this show me pics cause i dont have enough money to do this

For those of you who say you cant turbo charge a two stroke engine why did the old 2 stroke tractors and transfer trucks have them? I know that is a whole diff ball game, but the fact is you can supercharge a 2 stroke! The 871 blower that is used on several cars today was origonaly developed for a 2 stroke diesel! Just some food for thought and I might just be an idiot so feel free to tell me if I am!

OK, you can turbo and supercharge a 2 stroke (petrol or nitro). So I agree with you. Also look at the Hyper 21, it has a turbofan built into it, right enough it works more like a direct drive supercharger, but in a way the whole H21 is just a turbo unit. I know people are so closed of mind/uneducated that they won't understand what I mean by that but when installed the rear of the crankshaft and the fan ace create a compressor (essetially a turbo) to increase the air to fuel mix. Unfortunately all this does is compensate for the bad leak the back plate has, so there is no power gain.

Nitro Supercharers do work on our engines but the gains dont produce enough power to compensate for the extra drag on the flywheel, theyre not race legal and they cut down run times/tank.

So in my opinion Superchargers are not worth in on 3.5cc engines. Now on a Chevvy Short block, mmmmm nice.

I agree with you Alex! These engines don't make enough power to produce more power from forced induction! The old saying goes it takes power to make power!

on a 2 stroke it sort of supercharges its self the piston comeing down decreasces the volume of the crank case pressurizing the contents and when the intake port is uncovered it comes rushing in and out the pipe and then the intake port gets closed up by the piston on the way up and right before it closes off the exhaust a pressure wave called the "blocking force" jams the extra fuel/air back in o and i forgot that when the exahust port is uncovered the exahust actually sucks the stuff throught due to the first cone shape of the exhaust then once the intake is closed and the gases get to the other cone of the exhaust it returns a pressure wave shoving the crap back in and the longer the exhaust the longer it takes for the gases to get back to the exhaust port so a longer exhaust is for low rpm power when a shorter exhaust is for high rpm top end power did u know u can slightly tune where ur motor hits its peak power just by sliding the exhaust forward or back in the exhaust coupeler but it wont be verry noticable so when u go supercharging this really u cant get more into the cilinder than it already does unless the pipe was designed to send back a stronger pressure wave but i dont know and as for the lean condidion thing yea it dosent makes scence to me to put a supercharger on top of the carburator then it is not gonna let as much fuel in because the boost from the supercharger is going to not want to let the fuel in so to solve this its better to put the supercharger after the carburator to maintain the proper fuel air ratio just like on most supercharged v8 motors the carb or carbs are on top of the supercharger and they can also be blown through without much trouble because they have a fuel pump and a needle and seat and a float bowl which is kept full by a valve controlled by floats and the jet basically the end is always submerged in gas and the supercharger or turbo system wouldent blow the gas out and when u give something more air u gotta richen it again beccaus if u dont it will be too lean and as for tractor buddie that would be a 2 stroke v12 detroit diesel a beast of a motor 98 cubic inches a cilinder i believe im not sure but my dad knows anyways this does not use the crank pressure type system to blow the fuel and air in it is supercharged and has a intake port in the side of the cilinder but the crank case is filled with oil and the air goes directly into the side of the cilinder and is blown in by the supercharger and it has a cam and exhaust valves so it can hold pressure so like yea im not sure if its direct injected into the combustion chamber right before top dead center like a modern desil or port injected but i dout carbruated but anyway the detroit works because the fuel air dosent go into the case which it cant because its a v and the area inside the v remains the same becaus when one piston is up the other is down so you will never see a 2 stroke v only inlines because the crank case can be seperated at the bearings and it can still do its crank pressure deal u might say o yea what about a rz500 nope its not a true v its 2 inline 2cilinder 250 motors arranged in a v no common crank and people talk about reed valves no they will make no difference with the turbo i think turbo banshees dont even use reeds, reeds on a motorcycle are simply so that when the crank pressurizing takes place it dosent just decide to go back out the carburator and anyways the way a rc crank is set up is sorta like a aprillia rotary valve which is out spanking the 125 road race hondas with reeds rotary valves are better more precice and dont flutter like reeds at high rpms and they seal better so dont even talk about reeds cuase with a turbo they reeds would always be open cuase they would have more pressure on the carb side cuase of the supercharger all they do is slam shut when they get the pressure from the crank case effect trying to escape out the carb wow i feel like a scientist here and im only 15 id like to hear what u guys think about my supercharging theories!!!!!!!!!

well there is a video over at Global hobby with a XLB running a rb supercharger....the bugy idles extremely well and it absolutely flies....it even sound neat.... The owner said it didn't increase power a whole bunch but it made the motor run alot smoother with a more linear powerband....The video is dam impresive I must say

i and i forgot u need more fuel pressure like with out the supecharger the fuel pressure is higher than the free air pressure and u need however much pressure is in ur fuel line + however much boost ur making with the supecharger and a little more to clear up the lean ness so what are u gonna do try toput a fuel pump welll the one thing u can do is get the rb innovations pressure thing that goes in the line from the exhaust to the tank that lets exhaust pressure in but not out and install that in the exhaust pressure line then there is a auxilliary pressure line from the supercharger and install another of those things on there and maby it wont be to lean so richen the carb a bit and the fuel air ratio will be proper but still u can only get so much into the cilinder barley more than stock if any when the point of a supercharger is to jam that s*** in there and the turbo banshees can make some sick power but they have exhausts and everything designed for it and the turbo and the turbo blows through the carburator on the carburatedones and it works fine because they have a needle and seat and are not pressure fed they are gravity fed and the way the float bowl is the boost just dosent affect it its like running it at a lower altitude with more air pressure

http://www.trickracing1.com/home.html

and i think thats all i have to say about this

Yes Yes Yes i hav seen these superchargers along time ago and was considering to buy one for my inferno. But like one of the guys said above one roll and there goes 130 bucks that could hav gone into a better engine. But i just think that the design isent good enough you see i am an apprentace, a son of a mechanic ( my Dad) and i hav learnt all of this stuff and how a turbos and superchargers work.

But you see the design is only thrusting down air via a fan and it has to make its way through the carbe and get to the engine. I dont think the design is perfected as it should be, it might work and there is only one way to find out. Oh and it will keep up with the engines revs you see they sell different ratios of the pullys and a supercharger runs wright of the crankshaft so every spin of the piston means every spin of the supercharger. That is why a supercharger has basically no lag or better know as Turbo lag.

The best possible way to maximize the performace is to have a computer controlled engine ( fuel injection) Which is probeberly impossible to have because you will need Air, fuel, crankshaft and more sensors hooked up just to get that and look at the size of the engine and car there is no way to get that stuff on the cars engine and chassie.



Blah, blah, blah lets just get a helecopter motor .96 or something and bolt that to your car problem solved lol.[>:][>:]

hi chaps couldnt resist when i saw the supercharger and thought i ll have some of that and i ll tell you you what my savage flys
my set up was k4.6,3 speed box,52/13 clutch /spur which was great always wheelie n but when i put the super charger on anh tuned it up man it took about 3/4seconds before it changed gear from 1st to 2nd so in the end i had to change the spur/clutch to 47/18 as my mate was getting the arse as his savvy couldnt keep up
now i reckon that the k4.6 engine is 2.9 hp plus the supercharger and i put the new 50% pully on then i must have 4.35 hp which is pretty close to the 5hp twinzilla but without the weight (2 engines + 2 fueltanks) for £150 instead of £350 for the twinzilla well i think its a bargin the ONLY problem is they only give you 1 pully for the 4.6 engine when you really need 2 and these guys want $28 to ship to the UK so make sure you get everything on your first order as spares are cheap but the shippings a stinger

http://www.hostdub.com/albums/avdub/...hargedSH28.mov


supercharged XTM Mammoth.....sounds pretty dam good and it sure seems to go fast....

Hve you rolled your savage yet with the supercharger? What happened? Or did you have the roll cage brought for the car?


Just interested because i roll my buggy and thats on the street imagine the monster trucks they are unstable as hell when adding huge amounts of power and sharp turning.

hi mate have i rolled my savage yet you betcha but i do have a rollcage that bolts onto the body shell iknow it may seem a bit flimsey and weak but its stronger than you think but yeah it protects the head and the pricey supercharger.
i have also added extra wide wheels on my savvy to give more stablity and it works a treat(now it dont roll over on bends but balances on 2 wheels) and i tell you savage owners you should defintley buy a metal geared servo for your steering the responce is excellent have look on ebay you can buy a tower pro (who?) for £10 new and i aint had no problems with it yet
But if your having problems with your stability going round corners then guess who does a rear wheel steering conversion for the savage yep the same people who make the superchargers (rb innovations) and if you want EVEN more power from your nitro engine these people also do a nitros oxide kit aswell (man!! rb innovations should be paying me) but you will have to start up another forum to find out if they are any good because i have run out of dollars to buy more gear

one of my friends baught the rb inovations supercharger, i never saw it mounted on his t-maxx. I asked why he doesnt try to use it after spending almost 200 bucks on it and he said its just to hard to tune, he finally did get it running close and it wasnt even a noticeable power gain.

My question about the supercharger is how does it still run while pressurizing a carburator that runs on vaccume?
wouldnt the carb have to be before the supercharger for it to run correctly?

hi mate im no expert but the principal about the supercharger is basic you are forcing more fuel through so the engine works faster a bit like a barbeque light the fire it goes good as its drawing what it needs on its own but when you start to blow/fan it the fire goes better why? because you are forcing it

but yeah the supercharger is a sod to tune but did your mate try the cut out on the intake where you make a gasket and start experimenting on what size hole is best to restrict the air intake also they do an aux pressure feed that is outlet from the supercharger that joins to a y connector so it connects both the supercharger ,exhaust to the fuel tank to keep up the extra pressure needed there is one other thing to try but i aint done it myself yet (but early days) and thats a hypervalve which is (looks like) a one way valve from exhaust/supercharger to fuel tank to stop any drop in pressure

did anyone find the perfect size hole for the intake gasket in the supercharger for the k 4.6 ????
cheers

i have a friend who owns a hobby shop and he has one on his rc10...its on a o.s 15 engine an old one......it doesent really help anything other the looks of the engine...in other words its more of a conversation piece than anything....now this guy is a big time drag racer he builds 7 second all motor street cars so i think he knows a thing or 2 about superchargers...he also says the nitrous kits are a joke also...he says to run a higher nitro content to achieve the same results of the nitrous kit..after all nitrous is about more oxygen and so is higher nitro content

dont want to be rude but all you people who aint got a supercharger you all talk about the science of how it cant work but i have one and all my mates who i go racing with will agree that it does work and not by a little bit but a major power boost that there standard savages cant touch but what do i know as i aint got a clue about the science

Nitrous oxide and Nitromethane are two completely different things buddy, you freind may know something about cars and superchargers, but you sure don't....

Nitromethane require less oxygen to burn then gas, so you can burn alot more of it inside and engine then with gas, and thus making more HP...Nitrous is basicaly injecting more oxygen into the motor, Nitro methane is about burning well with less oxygen, nitrous is all about adding more oxygen.


Now people who say you can't boost two strokes needs to sit down and quit talking about stuff they dont know....everyone says a 2 strokes ports are open so it can't make boost....Well have any of you net experts ever tried blowing thru your motor carbutrator ?? as I can assure you there is plenty of air resistance inside the engine, hell blow into one end of an opensn straw and measure the pressure inside, and it will be higher then atmospheric, if it didn't reach higher pressure air would never be forced out the other end....I can assure its much much easier to blow ait thru a straw then it is to blow air into a nitro engine

Air is not sucked into a engine as you all think, air is actualy forced into the engine by atmospheric pressure, 14.7 psi is average atmoshpheric pressure....SO an engines ability to breath is limited by how much air can be pushed in with 14.7 psi, the supercharger will increase the force with which the air is pushed into the motor......As a result more air enters the motor which means more fule can be burnt, which means more power...

yeah i know the now the difference between nitromethane and nitrous trust me i guess i just didnt word that right....

I find it extremely funny that all you supercharger owners are willing to brag up and down about how it "definately works and makes it a ton faster" but no-one ever posts any empirical evidence that it works... The only empirical testing by an independant source showed a very very minor improvement in power at the cost of much difficulty tuning... When you guys decide to do some timed runs then maybe I'lll buy it....