Expansion chamber , but needs research & development

[djase10]

Cheers misteright1_99.

Only slight belly-
Yeah that's next on the agenda , to extend the belly,
(I'll probably use a fly spray can or similar for the extension).

Jase

 

[beachcruiserD]

Hi All
Now that i have my Gasless MIG welder,
i can weld thin steel
without the worry of BLOWING HOLES through the work!!

Time for what i have wanted to do for AGES ..

Develop a cost effective expansion chamber..

SO....

Bought a cheap pocket bike expansion chamber,
& cut it up,
& welded it together so to fit a HT 48cc..

Results are ..
without muffler ==TOO Loud , bottom end power increase ONLY,
LOST top end power ..
with muffler
What a beautiful sound it has, it almost sounds like a 4 stroke thumper.
lovely exhaust note, louder , but not Aggressively loud..

sounds & looks the part ..

BUT, as before
= BOTTOM END POWER ONLY.
So------- some further research & development is required..
A pleasure to do ..

Yes i could have bought a BETTER pipe to start with, but $75 JUST to cut up and see what happens isnt in my book..

Only cost me $10. for the pipe i used..

Jase

SO HAVE YOU NOTICED ANY CHANGE IN PERFORMANCE? SORRY FOR SHOUTING......im curious about expansion chambers and the peformance related with one, and how much total $ and effort you put into a well performing one too, thanks,beachcruiserD

 

[djase10]

$20AU -1/4 roll mig wire & About 6hrs

SO HAVE YOU NOTICED ANY CHANGE IN PERFORMANCE? SORRY FOR SHOUTING......im curious about expansion chambers and the peformance related with one, and how much total $ and effort you put into a well performing one too, thanks,beachcruiserD

Hi beachcruiser.

$20AU -1/4 roll mig wire & About 6hrs of work / r&d.

Definite bottom end improvement all round with all the pipes i've done..


BUT i cant be 100% decisive on top end ====
DUE TO A FUEL STARVATION PROBLEM I"M HAVING at a certain rev range.

It is definitely worth the effort , thats for sure,

& extending the belly of the expansion chamber ,
( as picture suggests ),
is next on the cards,

I think thats where the top end is ,
( but space is also an issue), it's all R&D..

I'll update as i progress..
Jase

 

[xPosTech]

Wow what a neat pic edit. I think you photoshopped (or printed and snip snipped?) it rather than chop up your garage floor and pipe with a guillotine. But man, did it do a number on your finger!

I saw a container for spare coal oil or Coleman® fuel at the local G.I. Surplus that might be ideal for matching boost bottle and resonator. Guess I'll have to pick up one or two, try them out and post pics. It comes in a beautiful metallic magenta anodized finish, teardrop on one end and squared off on the other.

Taking my memory into consideration it was 750 ml and about 8 bucks (and purty). About the size and shape of those tall R-134A refills (Super Chill?) with the gauge on top.

Shame it's aluminum. I'll try not to wreck the finish.

Ted

 

[jlebh1]

how good do those gassles mig welders weld? i was thinking of getting one also do you think that the expansion chamber would work with the 66cc HT engines?

 

[djase10]

gassless mig welds great

how good do those gassles mig welders weld? i was thinking of getting one also do you think that the expansion chamber would work with the 66cc HT engines?

Hi jlebh1.

Yeah i'm very happy with the welder and recommend one,
BUT make sure it can also take 5KG spools as well as the LITTLE 900gram spools.

AND can use gas also.

as for the expansion chamber thees pipes are a little small for a 70 ,
and as mentioned B4, the belly needs extending.
Jase

 

[djase10]

Latest expansion chamber V3 FOR 34RED

Yep latest Version 3 expansion chamber,

specifically designed for 34RED.

Exhaust port to chamber u bend to muffler.

**************************************************

BOTTEM END CENTRAL.

34T sprocket
only good for hill climbs & major head winds.

overall=
****=
abso usless top end, THE WORST of all iv'e made.

Looks excellent ,

way to loud (even louder than my stingray) without the power.

I need the correct figures for these motors to continue this properly??.
Jase

 

[jlebh1]

is that the one on youtube?

 

[djase10]

yeah the one on youtube.

is that the one on youtube?

Yeah thats the one.
Enjoy your arc welder jlebh1.
Jase

 

[djase10]

does anyone have the correct info to fill in these boxes??

Hi'yas all.
Yeah, does anyone have the correct info to fill in these boxes??

any info would be good
as i dont have the tools to measure them.
Jase