Looking to make an expansion chamber...

[Motor Boys]

I was wondering if anyone had any tips on fab.ing up a quick expansion chamber. I was thinking of buying one but not sure if it is what I am looking for .. So i want to make a little tester first and see where it takes me. Any tips would be great pic's would be outstanding.
Thanks

Ps I have a welder and everything i would need, just would like to try something new.

[Motor Boys]

Can anyone help me out?

[2door]

Originally Posted by Motor Boys

Can anyone help me out?

You might want to take a look at this thread > http://motorbicycling.com/f4/expansi...ers-12490.html and if it doesn't help use the search feature, key word, 'expansion'. I think you'll find some very good information easily available.
Tom

[Motor Boys]

Thanks 2 door

[Venice Motor Bikes]

Norman knows how to make them... PM him & ask.

[freewheeling frank]

they work. but just punching out the stock mufflers has worked well for me that is drilling holes not only the end caps but internaly ya the get loud no louder than the herd of harleys, bought a tuned from spookytooth, just to tight for my builds barely rubbed the front tire but did increase power, no more than opening the stock muff up the units that are high up against yer leg seem to get better reviews

[tyrslider]

Old 2 smoke tuner books usually have basic designs. Now there's software simulators but back in the day it was trial and error. It can be a lot of tuning work and you really want to have spare jets in different sizes! HuckerSteve likes his Sick Bikes ex chamber and his bike is rediculously fast!

[foureasy]

there is nothing quick about it

[Motor Boys]

Thanks for the help guys, just looking to see if they make a big difference.... do they?

[foureasy]

a bigger difference than anything else you can bolt on..... if done properly, it can create as much as 6psi of vacuum or pressure to "supercharge" the motor during a specific rpm range. but there is more to it than a longer header or holes in the stock pipe.