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SUPER CHARGED WR450F

By scheffaa,
in WR400F/426F/450F

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scheffaa

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hey all,

i have heard that you can buy superchargers for wr450f's, they cost around $5000, just wondering if anyone has installed one or ridden a bike with it. the bike has plenty of power but a few more ponies carnt harm.

03 wr450f, fully stocked with after market parts

live to ride and ride to live

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donutman126

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that would be sick if its possible im not shure but i have a t-maxx rc car i know its not the same but if you buy a supercharger for those u have to rebuild the engine every like 4 quarts of fuel where a stock t-maxx can go like 10-15 gallons of fuel no problem so i bet your engine wouldnt last long

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Grand Master

Ride

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I have actually looked into manufacturing a supercharger system for the YZF250 and the biggest issue on a thumper is the interrupted power pulses that make a large intake plenum necessary. It is more of a packaging issue than anything else. Also the reliability can be dialed in or out depending on what PSI boost you decide to run. You can make 3% more power or 200%, just depends on how far you want to boost it. Unlike "Yawn" above i think a supercharging makes sense. Nice power increase from top to bottom and adjustable as needed. I still want to try a 250F with one, light AND fast.

K

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wrooster

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wrooster, i think you should get over yourself, anyone true bike rider is always after more power unless you are a fairy rider.

what you seem to be saying is that and modification is not worth it.

hmmm, what i could do with an extra $5K... let's see...

buy another bike.

buy 4 weeks at a villa on Santorini or Mykonos Greece.

buy lots of shares in GOOG.

buy a BAJA/Mexico trail riding adventure incl airfare.

buy plane tickets to every major European capital.

buy a pair of custom Benelli over-and-under shotguns.

buy 20 cases of Casaloste DOCG wine from Italy.

buy plane tickets to .AU/.NZ and do fsck-all for a month.

buy my wife a pair of 1ct diamond earings.

or add a supercharger to a 250lb trail bike that already has 45+ HP. ?

read my sig. take a look at the pictures. more power sometimes means you just hit the trees faster. besides, adding a supercharger to an engine with an already high factory compression ratio likely will mean you'll soon see the end of the connecting rod without having to disassemble the motor.

i'm not telling you how to spend your money. you asked (in the 250F forum i might add, before this thread was moved here by Sunruh) what we thought about spending $5K on a supercharger for the WR450F. i opined. you didn't like my response. move on.

> what you seem to be saying is that and modification is not worth it.

that's exactly what i'm saying. as you progress in life you'll notice that not everyone agrees with you. concurrently, you don't have to agree with everyone else. but if you have $5K and want more power for your WR450F via a supercharger, go ahead and buy it -- i'm not, nor is anyone else, stopping you. then tell us how it works out here, or do a writeup for a magazine article.

jim aka the wrooster

'01 wr250f

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Grand Master

Ride

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I'm not telling you how to spend your money. you asked (in the 250F forum i might add, before this thread was moved here by Sunruh) what we thought about spending $5K on a supercharger for the WR450F. i opined. you didn't like my response. move on.

Actually well said. I think the idea has merit for the smaller bikes and could be designed and built for much less that $5000. It is an interesting idea to me but I've always had an affinity for supercharging.

Cost rationality really does not apply here though as someone looking for a supercharger is already off the deep end like a lot of us. Do we really need $800 exhaust pipes that add .5 HP? Do we need $10,000 XR50's? $400 CF air boxes? $2500 forks? $300 hubs and clutch baskets? This is not a rational sport. Some like to be extreme. That is the market for the supercharger. A lot of people justify $2000 for custom wheels for there car when the ones that came with it go around just fine. It's all what you want to do with your money. If someone wants a supercharger for their 250 pound 45+ HP (they don't make that much but whatever) bike so be it. I won't judge. Maybe that same person thinks your crazy for buying $150 Nikes when $20 Walmarts cover your feet also.

Where was i going with this ? Oh, yah, I guess I'm saying that instead of posting a yawn maybe you could have just left it alone or had some input one way or another. No big deal just an observation.

Now back to installing my $300 flexxbars on my $7000 Ferrari (Husky) motorcycle which cost me $200 a month to keep tires on.

This is a ridiculous sport... and I love it. :awww:

:devil:

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Mike_socal

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How exactly are you going to supercharge a 250/450f? There's not a whole lot of room to mount a supercharger let alone the brackets to hold it. Where does the belt run and what does it run off of? Maybe you could run it off the chain but I think that would be difficult to get working with the swingarm axis. Wouldn't a turbo be a lot easier to mount and it wouldn't rob as much power as a supercharger?

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Ride

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Run it off the cam out one of the head openings, mount the SC right to the head where the carb goes and mount the carb to that. You can't use the drive chain for many reasons but mainly because it does not rotate in relation to the motor because of the gears.

Turbos create a lot of heat, need special oil requirements and volume / cooling, and cause major throttle lag which is acceptable in cars but not bikes. They are also typically week on the bottom end and make all the power on top.

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Mike_socal

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I think running a belt off one of the cams with some sort of cog pulley would put quite a bit of pressure on the bearing on that side. You would also have to devise some sort of seal around the cog pulley setup so that oil doesn't start pouring out when the bike falls. Then you would have to mount the supercharger so that the head unit pulley is lined up perfectly with the cam pulley otherwise you'll start throwing belts. I thought you could size turbos small enough to eliminate most of the lag. A turbo sounds so much easier than a supercharger although I don't think either would be very easy to fabricate for a skinny dirtbike with a 12:1 compression motor.

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Hamish

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Run it off the cam out one of the head openings , mount the SC right to the head where the carb goes and mount the carb to that.

So as well as changing the gearbox on a regular basis, you will be doing complete top end rebuilds when it snaps the cam chain and destroys the top end. Forced induction on dirt bikes is a complete wank in my opinion. If a 525Sx hasn't got enough power for you, you must be a damn fine rider ? Anyway, the current lineup of 4 strokes are top heavy enough as it it, without bolting on more weight. Thats why the 250 s smokes still beat the big 4 strokes on most tracks with ease.

my 2 cents

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jwriott

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Thats why the 250 s smokes still beat the big 4 strokes on most tracks with ease.

I agree that the new bikes are fast enough but have you seen Ricky Carmicheal on the CRF450? 250cc, 2-strokes aren't even close.

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durtslinger

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a supercharged WR450 would draw enough attention at a trade show or convention to justify the cost to a dealer or parts supplier if the installation was up to snuff.

I personally would not want to be 20+ miles back in the woods with this hair dryer atached to my bike- I am running a stocker 426 and I have yet to find myself thinking, "this bike is too slow, I sure could use a supercharger" Now, my friends who ride those red bikes, they may tell you different! ??:devil::awww:

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Hamish

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I agree that the new bikes are fast enough but have you seen Ricky Carmicheal on the CRF450? 250cc, 2-strokes aren't even close

hehe..ok maybe I wasnt entirely correct. All the SX races that I've see down here in OZ the 2 smokes win the top 5 or more places in the pro open class. Natural terrain MX tracks would obviously be a different story. But in the pro lites, the 250F's are way more competitive.
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