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Old 06-04-2004, 08:22 PM   #1 (permalink)
Insane
 
Location: Toronto
How bad of an idea is this...

I am planning on turbocharging my two stroke weed whacker. It seems like just some fun project and if it worked I could kick the shit out of some weeds. What I am asking is, is it possible to get a turbo or even make one that is small enough to fit onto my weedwhacker engine? It's 22 CI's I think. I've got an extra so breaking it is not an issue.
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Old 06-04-2004, 08:37 PM   #2 (permalink)
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Location: Don't worry about it.
I'm sure it's possible. Building the turbo would be the hard part I would guess. Those engines run hot already as well, it's only going to run even hotter.

Heat will be an issue.
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Old 06-04-2004, 08:49 PM   #3 (permalink)
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Location: Wisconsin...
That will be tough trying to find a turbo that small.....i'm thinking of turboing my motorcycle myself.
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Old 06-04-2004, 10:14 PM   #4 (permalink)
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Don't feel crazy ickma, I have been thinking about something quite similar for a bit. Turbo charging a Toro lawnmower. I want the light weight of a 5.5hp Kawi, but with the power of the 18 horsers on the Z mowers. Biggest problem has been finding a turbo small enough. Those little engines just don't move much air.

Your weedwacker is probably 22 cc's. 22 cid would be hard to hold, thats 1/4th the size of the engine in my Toyota.
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Old 06-04-2004, 10:51 PM   #5 (permalink)
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Location: Champaign, IL
First off you have to find a turbo. Then you have to figure out a way to cool it. Then you have to fab all the custom parts. Then you have to hope it doesn't explode. Twould be awesome if it worked, but have fun!
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Old 06-05-2004, 08:03 PM   #6 (permalink)
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hmm ... I googled "lawnmower turbocharger" and the only thing I got that was remotely on topic was a site about turbo'ing a Geo Metro.
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Old 06-05-2004, 08:56 PM   #7 (permalink)
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Location: On a gravel road rough enought to knock fillings out of teeth.
Well, I once toyed with the idea of running a line from the discharge on my leaf blower back into the air cleaner.....
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Old 06-05-2004, 09:20 PM   #8 (permalink)
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Location: Aliso Viejo, California
Quote:
Originally posted by MrSelfDestruct
hmm ... I googled "lawnmower turbocharger" and the only thing I got that was remotely on topic was a site about turbo'ing a Geo Metro.

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Old 06-06-2004, 01:27 AM   #9 (permalink)
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Location: norcal
kinda related....i have heared of people using automotive a.i.r. pumps as blowers on lawnmower engines...havent done it myself yet..maybe this summer
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Old 06-06-2004, 08:39 AM   #10 (permalink)
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What would be the point? It wouldn't make it any better on the other end. It's goverened to a certain engine (and shaft) speed. All you might do is get it to full speed faster - and that's assuming turbo lag is shorter than the time it takes to get it to full speed now.
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Old 06-06-2004, 10:25 AM   #11 (permalink)
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Location: Ohio
Maybe NOS would be easier.
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Old 06-06-2004, 10:53 AM   #12 (permalink)
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Location: Somewhere over the rainbow
I think there was a very small dodge omni turbo at one time? I believe it was a three cylinder turbo. Don't quote me. I'll do some looking, see if i can't find it...
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Old 06-06-2004, 11:46 AM   #13 (permalink)
Crazy
 
Location: Philly
A daihatsu in Australia used a really small IHI turbo. It was a three cylinder econo-box. Start scouring google and ebay and it should turn some stuff up.

Also, there is a turbocharged barstool out there, Im pretty sure it uses a tiny turbo. That would be a good place to look.
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Old 06-06-2004, 12:27 PM   #14 (permalink)
Insane
 
Location: Kentucky
Quote:
Originally posted by merkerguitars
That will be tough trying to find a turbo that small.....i'm thinking of turboing my motorcycle myself.
It has been done, many times.

Easiest with 1000+cc sportsbikes, but there are some GSXR600s that have been turbocharged with small garret turbos ( the ones for the 1.3 liter beetle, I will try to find specs...)

As far as a weedeater, how to turbo it? Good luck. It is a tiny engine, and two stroke. I don't know of any turbocharged two strokes in existance ( well, except for diesel engines )

If you did manage to find out a way to turbocharge it, you would be rolling in dough.

Remote control cars/airplanes and 50cc pocketbikes/racebikes are two applications that would use it in great numbers....

But, you have the following problems :

Do a google search for model aircraft gas engines... they are about the same size, displacement wise. I read an article once that said they don't have enough exhaust pressure to drive a theoretically matched size turbo.

I believe it.

Problem number two : You forget that these small two strokes have a pressurized crank case. Are you going to blow up the crank case from turboing?

And three has already been mentioned. Heat.
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Old 06-06-2004, 01:01 PM   #15 (permalink)
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Quote:
Originally posted by Stare At The Sun
I think there was a very small dodge omni turbo at one time? I believe it was a three cylinder turbo. Don't quote me. I'll do some looking, see if i can't find it...

You're correct, although it was a 4cylinder. I actually saw one a month ago. They're pretty cool. It's the Dodge Omni GLH (which stands if I recall for "Goes Like Hell") and the thing was just FAST for an Omni.
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Old 06-06-2004, 05:26 PM   #16 (permalink)
Insane
 
Location: Toronto
I'm thinking about attacking a cordless drill to it and making it a blower instead. That way I don't have to worry about not enough pressure from the exhaust. If I figure it out I'll be sure to tell you all.
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Old 06-06-2004, 07:33 PM   #17 (permalink)
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Location: Wisconsin...
Yeah..pressurizing the crankcase would be a bad idea on the really cheap 2 stroke weedwhips...due that the seal some of the bottom ends with a plastic cover....
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Old 07-05-2004, 07:46 AM   #18 (permalink)
Upright
 
Quote:
Originally posted by shakran
You're correct, although it was a 4cylinder. I actually saw one a month ago. They're pretty cool. It's the Dodge Omni GLH (which stands if I recall for "Goes Like Hell") and the thing was just FAST for an Omni.
just so you know, the omni glh and glhx have vw motors (gti) and there are a few companies making turbos for them, the glhx was a shelb project and has a big throttle body and intake. i ahvve been looking for one for my own gti
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Old 07-05-2004, 08:20 AM   #19 (permalink)
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Location: Indian-no-place
http://powersports.honda.com/the_sto...eTitle=&bhcp=1


This was accomplished by creating the world's smallest turbocharger unit, boasting a scant, 2-inch-diameter turbine capable of spinning at a stratospheric 200,000 rpm to produce maximum boost of 18.5psi and goose the normally aspirated CX's peak horsepower from 50 to 82bhp at 8,000 rpm.

You you need to find one of these 2" turbos off of a '82 Honda CX500 turbo.

-SF

Actually, I'd use this turbo on one of those 2-cycle scooters! The turbo would help you get up to max rpm faster, that'd be one hell of a little scooter!

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Old 07-05-2004, 04:22 PM   #20 (permalink)
Upright
 
If you attached a drill for the "turbo" it would then be closer to a "Supercharger". One of the big problems there is regulating the speed of the drill to the motor. I have also never seen a turbocharged or supercharged two stroke. I think this may be the stoper for you. Two stroke motors are very finicky on exhaust and intake pressures. I do know that if you start messing with the exhaust on a two stroke bike you can really mess it up. Don't give up. People with difficult or impossible dreams are the sparks to great inventions.
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Old 05-26-2005, 12:25 AM   #21 (permalink)
Upright
 
hi im new here,

i have found this site from google and i have Built a turbocharged go kart.(almost finished and its in the Testing stages)

engine type:
Victa @ stroke 150cc engine (now 169cc

modifications are:-bigger carburetor
-oversized piston to 040"
-Fule pump

The turbo is from a Subaru foresta (TF035Hm)

custom made manifold,



here is a link to the engine two weeks ago, i will post new pick of the engine


Last edited by 2-stroke turbro; 05-26-2005 at 12:27 AM..
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Old 05-27-2005, 03:38 PM   #22 (permalink)
Crazy
 
noblejr's Avatar
 
Location: Atlanta
Quote:
Originally Posted by BoomTruck
Well, I once toyed with the idea of running a line from the discharge on my leaf blower back into the air cleaner.....

This sound like it would be an easy project. I might have to try it out.
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Old 05-28-2005, 01:20 AM   #23 (permalink)
Upright
 
aa

Quote:
Originally Posted by noblejr
This sound like it would be an easy project. I might have to try it out.

LOL sound easy but................ it took me about a few months.....i still have fuel issues and also have piping and Boost issues so i just bought another turbo last night witch is as big as my palm and ill be doing that soon and it cost me around $1000+ and still counting teh dollas this is just the engine....
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Old 05-28-2005, 07:44 AM   #24 (permalink)
Crazy
 
Quote:
Originally Posted by MrSelfDestruct
hmm ... I googled "lawnmower turbocharger" and the only thing I got that was remotely on topic was a site about turbo'ing a Geo Metro.

hahaha

That's funny.
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