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> Engine back pressure
ltrhdevo
post Feb 8 2012, 11:41 AM
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Thunderheaders are a few years old. What the hell can I put in the end of the pipe to give it a little more back pressure.
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deuce04
post Feb 8 2012, 01:14 PM
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QUOTE(ltrhdevo @ Feb 8 2012, 11:41 AM) *
Thunderheaders are a few years old. What the hell can I put in the end of the pipe to give it a little more back pressure.



Thunderheaders dont use any packing so I guess you have to live with it.
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ltrhdevo
post Feb 8 2012, 03:41 PM
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Well my gears are going and plan on making something home made. Some thing as a bolt in baffle just past the end cone.
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frisco-rigid
post Feb 8 2012, 04:38 PM
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You might consider using the old bolt n washer trick..

Simply drill a 1/4" hole near end of exit..

Then get a 1/4" bolt and weld a fender washer or washer of your size choice to it so it looks kinda like a sucker..

Slip a "lock-nut" on the bolt threads and then put the "sucker" in the hole you drilled and lock with another nut on the ouside..

It's as old as the hills and pretty darn effective as a band-aid on a somewhat in-efficient exhaust system..

I participated in a discussion about this trick and some other stuff on another site a few years ago..

Here's the link to that thread if you're interested..

http://www.aimag.com/forums/harley-exhaust...er-inserts.html

have a ball
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ltrhdevo
post Feb 8 2012, 10:15 PM
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QUOTE(frisco-rigid @ Feb 8 2012, 01:38 PM) *
You might consider using the old bolt n washer trick..

Simply drill a 1/4" hole near end of exit..

Then get a 1/4" bolt and weld a fender washer or washer of your size choice to it so it looks kinda like a sucker..

Slip a "lock-nut" on the bolt threads and then put the "sucker" in the hole you drilled and lock with another nut on the ouside..

It's as old as the hills and pretty darn effective as a band-aid on a somewhat in-efficient exhaust system..

I participated in a discussion about this trick and some other stuff on another site a few years ago..

Here's the link to that thread if you're interested..

http://www.aimag.com/forums/harley-exhaust...er-inserts.html

have a ball



thanks
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blowout
post Apr 30 2012, 08:49 AM
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Als
o see ife they make reverb cones that fit inside the header where it mounts to the head.
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