washers in exhaust

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razzle51
Posts: 34
Joined: Wed May 09, 2007 12:07 am
Location: Iowa

washers in exhaust

#1

Post by razzle51 » Mon Jan 03, 2011 10:00 am

looking fot the pic. someone posted of how they put the washers in their exhaust like the old 305 scramblers had. could you please repost and how does that work for you on your pan



JR JOHNSON
Posts: 325
Joined: Thu Jan 07, 2010 5:13 pm
Bikes: 1941wla,1946el,1947fl,1950fl,1959flh,1972flh,4 twinkies,1 evo
Location: oregon

Re: washers in exhaust

#2

Post by JR JOHNSON » Tue Jan 04, 2011 2:09 am

hi look up knight rider performance,go to motorcycle performance guide,go to [ making drag pipes work],little info there on drag pipes,and back pressure stuff........with respect.............JR

razzle51
Posts: 34
Joined: Wed May 09, 2007 12:07 am
Location: Iowa

Re: washers in exhaust

#3

Post by razzle51 » Tue Jan 04, 2011 9:12 am

JR JOHNSON wrote:hi look up knight rider performance,go to motorcycle performance guide,go to [ making drag pipes work],little info there on drag pipes,and back pressure stuff........with respect.............JR
Will do, thank-you

mbskeam
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Re: washers in exhaust

#4

Post by mbskeam » Fri Jan 07, 2011 6:00 am

oh that was me....
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Schwee
Posts: 136
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Bikes: 57 Pan, 42 WLA
Location: SW Florida

Re: washers in exhaust

#5

Post by Schwee » Fri Jan 07, 2011 3:22 pm

mbskeam,

Really? Those little washers really make a difference?
I've been running 2" drag shorties, without baffles, since 1975.
Partners say my pan goes "fast and far."
What would I expect if I made this mod?
Actually feel a performance difference?
Sound different?
Need to do anything to the old M-74?

razzle51
Posts: 34
Joined: Wed May 09, 2007 12:07 am
Location: Iowa

Re: washers in exhaust

#6

Post by razzle51 » Sat Jan 08, 2011 9:32 am

mbskeam wrote:oh that was me....

Image

Image
Help me out here, how should you determine what size washers to try.For example , say you have exhaust that end up at 21/4" id at the end, could you use 2" washers and rotate them as to where it might make a difference. After you put yours in, did you realize a difference on the bottom and top end?

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