Weed whacker build - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Build Threads Building a motor? Post the progress here.

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 10-19-2009, 07:04 PM   #1
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Jul 2009
Location: Batavia, IL
Posts: 604
Total Cats: 0
Default Weed whacker build

Turns out my dad got a new weed whacker because the old one was old, leaky, and didn't have all the new add ons, so he gave it to me. I thought about adding a turbocharger to it. It IS possible on a 2-cycle engine, although the turbine will see a lot of oily exhaust. Also, a different carburetor will need to be fitted for a blow through application, so that the bowl and feed will not get pressurized, and that the venturi will see more fuel for a proper a/f ratio. I have yet to figure out where to get the turbo. I will be constructing the manifold/tubing myself. These guys were able to do it: Two stroke engine with turbo

Anyways, here is how it looked... not too bad. The carb was really gummed up and the muffler was plugged.

Name:  IMG_2781.jpg
Views: 1
Size:  61.1 KB

Teardown begins:

Name:  IMG_2783.jpg
Views: 2
Size:  91.9 KB
Name:  IMG_2785.jpg
Views: 1
Size:  68.6 KB
Name:  IMG_2786.jpg
Views: 1
Size:  52.3 KB

Ported the exhaust port, as well as the intake a tad. I need to find a pressurized carburetor for a blow-through application, but in the meantime, I am just going to mess around with this one. I got all the dried 2-cycle oil out of the passageways with carb cleaner and compressed air.

Name:  IMG_2787.jpg
Views: 1
Size:  48.9 KB
Name:  IMG_2795.jpg
Views: 1
Size:  58.5 KB
Name:  IMG_2798.jpg
Views: 1
Size:  65.2 KB

When I removed the emissions screw cover, I found there was no HI speed adjustment for the jet, just idle. Not the best of carburetors.

Name:  IMG_2811.jpg
Views: 1
Size:  58.9 KB

Polished and cleaned the muffler, changed the spark arrest.

Name:  IMG_2807.jpg
Views: 1
Size:  54.5 KB

The cylinder and piston had very minimal scoring which is surprising, so I just installed new rings and reassembled everything with (mostly) new gaskets. Here's how it looks now:

Name:  IMG_2816.jpg
Views: 1
Size:  101.7 KB
Name:  IMG_2817.jpg
Views: 1
Size:  99.0 KB

And here is a video:



Still trying to figure out where to get a properly sized turbine and compressor. Maybe a Smart
Cococarbine3 is offline   Reply With Quote
Old 10-19-2009, 07:07 PM   #2
Elite Member
iTrader: (24)
 
kotomile's Avatar
 
Join Date: Oct 2006
Location: Monterey, CA
Posts: 7,578
Total Cats: 40
Default

I can't believe you have a build thread for a weed whacker, lol.
kotomile is offline   Reply With Quote
Old 10-19-2009, 07:11 PM   #3
Elite Member
iTrader: (6)
 
Loki047's Avatar
 
Join Date: Sep 2005
Location: Chicago
Posts: 4,145
Total Cats: 0
Default

This is the next video for me. '

**** it...
Loki047 is offline   Reply With Quote
Old 10-19-2009, 07:15 PM   #4
Elite Member
iTrader: (10)
 
Join Date: Oct 2008
Location: Seattle, Wa
Posts: 1,780
Total Cats: 30
Default

Mitsubishi TD01H or TD02H. Still way WAY to big, but its about the smallest thing you will get.Teh CHURBO!!!
Jeff_Ciesielski is offline   Reply With Quote
Old 10-19-2009, 07:18 PM   #5
Elite Member
iTrader: (2)
 
miata2fast's Avatar
 
Join Date: Aug 2009
Location: Dover, FL
Posts: 2,899
Total Cats: 109
Default

Cummins diesel. You should not have a problem finding one at the junk yard.
miata2fast is offline   Reply With Quote
Old 10-19-2009, 09:08 PM   #6
Junior Member
iTrader: (3)
 
Join Date: Mar 2008
Location: Murphy, Tx
Posts: 182
Total Cats: 6
Default

Turbo won't work to well with a two stroke it'll just blow the mixture out the exhaust without significantly increasing the cylinder pressure. So you get a big increase in fuel consumption with almost no power increase.
Fidgitk is offline   Reply With Quote
Old 10-19-2009, 09:28 PM   #7
Elite Member
iTrader: (15)
 
Join Date: Dec 2007
Location: San Antonio, Texas
Posts: 4,889
Total Cats: 28
Default

I'll bet that Vespa is ear-splitting when it goes by.

Two-stroke turbo engines are pretty common in large diesels. The one I have seen first hand (425 HP in a military vehicle) was a Detroit V8 with a supercharger and a turbo in series.
ZX-Tex is offline   Reply With Quote
Old 10-19-2009, 09:30 PM   #8
Elite Member
iTrader: (12)
 
Join Date: Aug 2006
Location: Central-ish VA
Posts: 4,449
Total Cats: 16
Default

Get a garrett gt12
TurboByGarrett.com - Catalog

Then add a trigger wheel, injector, and microsquirt.
neogenesis2004 is offline   Reply With Quote
Old 10-19-2009, 09:36 PM   #9
Elite Member
iTrader: (2)
 
miata2fast's Avatar
 
Join Date: Aug 2009
Location: Dover, FL
Posts: 2,899
Total Cats: 109
Default

I have seen a turbo charged 2 stroke snowmobile before.
miata2fast is offline   Reply With Quote
Old 10-20-2009, 12:23 AM   #10
Elite Member
iTrader: (46)
 
Stein's Avatar
 
Join Date: Dec 2007
Location: Nebraska
Posts: 4,812
Total Cats: 138
Default

Smart car turbo. It's beyond tiny and available on ebay for $130 or so. Compressor wheel is like 16mm or something stupid.
Stein is offline   Reply With Quote
Old 10-20-2009, 12:38 AM   #11
Elite Member
iTrader: (1)
 
NA6C-Guy's Avatar
 
Join Date: Feb 2008
Location: Birmingham Alabama
Posts: 8,038
Total Cats: 43
Default

Build a powered r/c grill. Buy a small Weber grill and set up some wheels on the legs and rig this little guy up to it. Set up a simple steering system and buy a universal r/c controller. I don't think a turbo is going to work too well, so might as well do something funny.
NA6C-Guy is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
LucaCarMods's Boosted Dutch Miata Build! LucaCarMods Build Threads 11 02-14-2016 07:13 AM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Is my swirl pot design okay? FrankB Race Prep 10 10-02-2015 10:00 PM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM
Image resizer concealer404 Front Desk 3 09-29-2015 01:41 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 06:43 PM.