Page 1 of 2 12 LastLast
Results 1 to 25 of 29

Thread: Two stroke turbo - can it be done?

  1. #1
    Join Date
    Jan 2005
    Location
    Adelaide, South Australia
    Posts
    1,428
    My Cars
    Shitbox Suzi

    Two stroke turbo - can it be done?

    i will be getting a Zbox motor for my bike shortly, and im thinking a turbo would be nice

    http://www.zbox.com.au/large_engine.htm

    I think the problems would be if the seals can cope with a few PSI, finding a turbo small enough for a 66cc motor.
    Another issue is going to be oil supply for the turbo, but i can make something for that. i might be able to adapt up a charging circut from a motorbike, or just get a generator (old school on the wheel style) if i need an oil pump.


    Really, im looking for people who have done a two-stroke turbo setup, or have some knowlage on the subject.
    Where would i look for a turbo that small - i know they exist, i have seen photos.
    Fast, Cheap, Reliable - Pick any two, and the third is laughable

  2. #2
    Join Date
    Oct 2008
    Location
    erie, pa
    Posts
    19
    My Cars
    1994 525i 5speed
    wow diddnt know anyone else on this forum would have has one. i have a 2 stroke 80cc china motor on a 01 schwinn moab.

  3. #3
    Join Date
    Jul 2008
    Location
    portugal
    Posts
    129
    My Cars
    735i e32
    A good 80cc 2 stroke engine produces power in excess of 20hp. By the looks of it, that engine is very very very very.... chinese. Prety sure it wont last more than 3 seconds if you turbocharge it.
    "Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car.
    Horsepower is how fast you hit the wall, torque is how far you take the wall with you."

    by some guy on the internet

  4. #4
    Join Date
    Oct 2005
    Location
    garage
    Posts
    145
    How would boost affect a crank case compression 2 stroke?

  5. #5
    Join Date
    Nov 2003
    Location
    SF, CA
    Posts
    1,206
    My Cars
    92' 525i
    Why not just get a 100cc?

  6. #6
    Join Date
    Oct 2004
    Location
    Australia
    Posts
    2,663
    My Cars
    1994 M3
    12/71T GM diesel had 2 superchargers and 4 turbos, they are 2 stroke
    cheers, Alan



    1/4 mile-12.92 @ 108.64mph-NA 3.0L m3 daily driver

  7. #7
    Join Date
    Sep 2005
    Location
    Texas Hill Country
    Posts
    2,085
    My Cars
    '98 Turbo M3, '17 M3
    Quote Originally Posted by Orac View Post
    How would boost affect a crank case compression 2 stroke?
    Look at a diagram of a two stroke. The air/fuel/oil mixture enters through the crankcase to lubricate the bottom end.

  8. #8
    Join Date
    Nov 2006
    Location
    Hagerstown, Md
    Posts
    684
    My Cars
    1995 M3 Drag C4 Auto
    I think aerodyne used to make small sealed units that don't need lubrication, but they may have went out of business. I'm sure it wasn't small enough though. You may be barking up the wrong tree. Just look for another engine with more displacement/power. I know of a guy that adapted one to a 125cc motorcross bike. It was suppossed to be wicked.
    GDM ENGINEERING

  9. #9
    Join Date
    Aug 2007
    Location
    Hangover, PA
    Posts
    939
    My Cars
    03' M5
    would the motor your looking to do this to have reed valves?? cause i think the boost would just push through that and it wouldnt run right.. and would the exhaust have to be "tuned" for the right back pressure and air flow? therefor a turbo wouldnt be able to do that, just my 2 cents

  10. #10
    Join Date
    Oct 2002
    Location
    Ian's House
    Posts
    1,304
    My Cars
    S54 M-Coupe (Estoril Blu
    two strokes can be FI but not regular reed valve engines. it would have to be a Direct Port Injection Orbital Two Stroke. that is where the exhaust port closes before the fuel is injected into the engine.
    Maddog


  11. #11
    Join Date
    Aug 2005
    Location
    Ottawa, Canada
    Posts
    1,823
    My Cars
    10/96 318IS
    This is the smallest turbo known to me.
    Mitsubishi TD02 series.

    Don't forget you can pretty much cut the recomemnded CC's in 1/2 since 2 strokes push through twice as much air through them then the same sized 4 stroke engine would.

    http://cgi.ebay.com.au/Turbocharger-...742.m153.l1262
    Even still far too big for a 66 cc 2 stroke engine IMO.

    Main problem for turbocharging gas powered 2 strokes is that their are not many fuel injection systems for the 2 stroke engines yet.
    Orbital I think sofar is the only one, and is what is used on Evinrude\Johnson outboard boat engines.

    Guy in Ontario managed to boost Polaris sleds but did this by expensivly re-jetting the carbs with extra passages to open up when on the boost.
    Last edited by Jeffrie; 10-18-2008 at 01:53 PM.

    Current Mods....X-Brace, Stromung Cat Back Exhaust, 17/225/45 M3 Replicas, HotBits Adjustable Coil Overs, 40% LSD 3:91 Diff, E30 Gearbox, Boosted.

  12. #12
    Join Date
    Oct 2004
    Location
    A-town, Bitches!
    Posts
    6,049
    My Cars
    Escortizzle
    My old roommate wants to turbo the Lambretta (sp?) motor that is bored/stroked, etc., that he's swapping into his Rukus.

  13. #13
    Join Date
    Nov 2006
    Location
    minneapolis
    Posts
    1,855
    My Cars
    tite
    its been done. hmt

  14. #14
    Join Date
    Dec 2006
    Location
    Mesa, AZ 85202
    Posts
    1,564
    My Cars
    325i, 3/4ton Truck
    nitro methanol, IE rc car fuel, will give your 2 stroke a power boost. be careful cuz you can melt down the piston, use ratio no more then 25/75.

    you really dont want back pressure on a 2 stroke. a supercharger will work better.
    Becoming a Professional OT Troll . CAN Bus Project: http://www.youtube.com/watch?v=2QuRBQzGs-c VGT/VNT +LDA controller: http://dmn.kuulalaakeri.org/vnt-lda/

    Quote Originally Posted by [B]SilverBeam[/B]
    Dude you're the biggest asshole ever. I will never reply to your texts or call you back EVER!!!!!
    Quote Originally Posted by sparkchaser
    I'm Stupid
    Diesel > gas

  15. #15
    Join Date
    Oct 2005
    Location
    garage
    Posts
    145
    Quote Originally Posted by morerevsm3 View Post
    12/71T GM diesel had 2 superchargers and 4 turbos, they are 2 stroke
    Though they are diesel arnt they? They work completely different to a regular gas engine 2 stroke.

  16. #16
    Join Date
    Oct 2004
    Location
    Australia
    Posts
    2,663
    My Cars
    1994 M3
    Quote Originally Posted by Orac View Post
    Though they are diesel arnt they? They work completely different to a regular gas engine 2 stroke.
    still use intake ports, but have 4 valves/cylinder, all exhaust, still work in same way as any other 2 stroke except they are compression ignition instead of spark.

    small petrol 2 stroke exhaust will not be hot enough to cause decent exhaust gas expansion to spool turbo very well
    cheers, Alan



    1/4 mile-12.92 @ 108.64mph-NA 3.0L m3 daily driver

  17. #17
    Join Date
    Jun 2008
    Location
    Texas
    Posts
    49
    My Cars
    E39 540iA
    You will have a hard time turbocharging anything much less than 500cc. You will have to take the supercharger route.

  18. #18
    Join Date
    Jan 2005
    Location
    Adelaide, South Australia
    Posts
    1,428
    My Cars
    Shitbox Suzi
    so i would be best off running nitro, and looking into getting some headwork and exhaust tuning done.

    cheers for the help fellas, im tempted to get the 4 stroke, and bumping the compression up to about 10:1 - will let you know what happens.
    Fast, Cheap, Reliable - Pick any two, and the third is laughable

  19. #19
    Join Date
    May 2008
    Location
    California
    Posts
    179
    My Cars
    Supra

  20. #20
    Join Date
    Jun 2004
    Location
    Europe
    Posts
    1,203
    My Cars
    ofc
    I wouldn't buy that turbo with plastic impeller
    There is the Mitsubishi T01, but impossible to find

    about small turbos...
    http://www.aktivematrix.com/forum/vi...ca8ae0e7bfb752

    Your post suggested me some ideas about a motorized (FI ) dirt/mx bycicle...
    Last edited by nuvola rossa; 10-19-2008 at 09:02 AM.

  21. #21
    Join Date
    Sep 2008
    Location
    CT
    Posts
    1,536
    My Cars
    e34 for tha keeps
    PROOF:


    Turbocharged CR125.
    apears to be internaly wastegated.
    ...although its just kinda chillin the the vacuum hose hangin out
    with a draw through carb setup
    and i know those motors, it DOES have reed valves

    more pics in the link:
    http://www.dirtrider.com/news/141_04...ike/index.html

    Turboing a two stroke is alot of work.
    you need to seal up the carb so it wont leak boost.
    theres no oil pump so you would have to rig up
    a mech or elec one.

    HOWEVER....
    there is the myth of using car smog pumps as superchargers...
    in theory it could work on two stroke and your oil supply problem would be fixed... i once wanted to try it on my moped with the smog pump from an MG Midget. i think this summer i might attempt this again. also some RC car parts companies sell superchargers... but they look microscopic.

    but hey, the snowmobile guys turbo frequently.
    and if you can find an aerodyne one go for it.
    i think the company went under, but good luck.
    Last edited by XR000mb; 10-20-2008 at 11:03 PM.

  22. #22
    Join Date
    Nov 2006
    Location
    minneapolis
    Posts
    1,855
    My Cars
    tite
    i think you can just build a carb box - i read that somewhere that made it sound really simple. basicly incase the whole carb in a air tight box with a charge pipe to it. carb automaticly does its thing and thats it. i read somthing about a 1:1 fmu too i think..

  23. #23
    Join Date
    Jan 2005
    Location
    Adelaide, South Australia
    Posts
    1,428
    My Cars
    Shitbox Suzi
    http://www.blouchturbo.com/turbos/IHI_RHB3/

    Still not sure that the exhaust flow would spool it - even if i weld the wastegate up airtight.

    http://www.turbobygarrett.com/turbobyga ... 068__1.htm

    That seems to big as well.


    Perhaps a supercharger would be the way to go - i know they make them small enough for RC cars, perhaps there is something sized for what i need.

    Anyone got any links to good RC sites, or something like that?
    Fast, Cheap, Reliable - Pick any two, and the third is laughable

  24. #24
    Join Date
    Dec 2003
    Location
    Elwood, Illinois
    Posts
    1,768
    My Cars
    5 Series Sport Wagon
    We have (2) aerodyne turbos on our 1000cc mountain sled . And we have (1)aerodyne on our 600cc drag sled. Aerodyne turbos are internally oiled and have adjustable vane technology. The company went out of business but there are a few people who rebuild them and sell. They make some psyco power and I won't ride the drag sled (I'm to slow for it) LOL ///J.T.?//
    Lot's of new stuff hope it stays together a little longer. LOL

  25. #25
    Join Date
    Sep 2008
    Location
    CT
    Posts
    1,536
    My Cars
    e34 for tha keeps
    Quote Originally Posted by got psi View Post
    I won't ride the drag sled (I'm to slow for it) LOL ///J.T.?//
    nonsense. no such thing. ask long as the straight away is long enough haha.

    powerbands on two strokes are fun enough. adding FI would only make it funner

Page 1 of 2 12 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •