Exhaust My nEw Exhuast flangle and down pipe

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chieflets

Guest
#1
Made up new flange bracket to suit the 80cc retangle cylinder port to oppose circle. also increased the down pipe to 1 1/4 inch (32mm)

sound still the same will test performance next few days

Chief


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P

psuggmog

Guest
#3
I am in the process of making a new pipe for my motor as well. I wanted to make a pipe that matches the port and then transition to round cross-section. I carved a wooden dowel to fit the port shape. My plan is to use this as a internal form to hammer the end of the pipe to the shape of the port. I have already made the pattern for the flange. I want a longer exhaust pipe as well to get the oily exhaust away from my bike.
 


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uncle_punk13

Guest
#5
I'm in the process of adapting the long (motorcycle type) exhaust from my late fifties 48cc Puch (two stroke) moped.
I'm interested to see how well this will work...
Rif
 

G

Guest

Guest
#6
I'd pay you good $$ for a new exhaust flange with downpipe..I get someone to weld it to my existing muffler. Let me know if you are interested in making another one for sale. I'd be others would be interested in buying them...could be a good way to earn a little extra cash.
 

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gone_fishin

Guest
#7
in an early phone call with dennis foster, he told me the longer exhaust gave a surprising performance boost.
 

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gone_fishin

Guest
#8
DrewD said:
I'd pay you good $$ for a new exhaust flange with downpipe..I get someone to weld it to my existing muffler. Let me know if you are interested in making another one for sale. I'd be others would be interested in buying them...could be a good way to earn a little extra cash.
no kidding. anyone who'd do custom exhaust could set up shop in "buy/sell/trade"...that'd be cool to see :)
 

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chieflets

Guest
#9
what happened to my avtar.....


Yes i could make some money but it be pointless if it didn't improve the performance. I will test in next day or 2 just recovering from my pocket bike injuries 110 km/h death woobles stack

Chieflets
 


C

chieflets

Guest
#11
k tried my new exhuast out and square flange to suit the cylinder port bottom end lost slight torque but i noted that my midrange and topend toque improved dramtically i was going up a street 800m long with bottom to top 7 of metres diffrence my max speed was 48km with 80cc chineese and 44t rear sprocket. the motor just seemed to wanna go and go will have to try on flat surface next day or two

Pro's
I gained 2km/h speed increase with more torque in midrange and topend which Iam pleased about cause thats what i was aiming for over the standard chrome pipe


Con's

Lost bottom end torque
 


C

chieflets

Guest
#13
I can fabricate you one the only thing is do u want whole exhuast or just flange and downpipe and u cut ur old muffler up and get some to weld it ur way


I just wanna do 2 more test with the pipe will let you knowby tommorow might even have better concept

just hang in there for day or 2

Chieflets
 

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Guest

Guest
#14
Flange and downpipe is all I need. I'll get a local shop to weld on my old muffler. I'm at 7200 feet in altitude and could use every bit of power I can get.

THANKS,
Drew
 


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