How to install a foam lip on a 511

[Steve Mac]

Ya know I thought about this a long time and refused to believe there wasn't an easy way
that would not harm the horns and that would take less than 2 hours...
anyway that's how I am..
I'd rather take two years to figure out how to do it in a few hours.

I was on the right track but didn't think it through.
The pipe foam in Lowe's/Home Depot is okay.
Here's what I did:
1) take a dowel with foam and first cut a slice to use as a base...
this was what I finally figured out
http://www.steevee.com/images/foam1.jpg
http://www.steevee.com/images/foam2.jpg
2) apply it to the edge...
http://www.steevee.com/images/foam3.jpg
3) cut/shape attach the pipe foam to the edge plus the additional foam edge
http://www.steevee.com/images/foam4.jpg
http://www.steevee.com/images/foam5.jpg

The effect is appreciable...sounds like horn blare diminished. It sounds MUCH better.
This'll cost ya 10-20 bucks...hope someone finds this helpful!

[valhallax]

hey steve...
thats sweet , think it'll work for multicells? i understand the theory and you've done a nice clean job. looks like a lil' pink left from the smoothing of the bores.. i was wondering if you did a before and after measurement? love your system..i say go big or go home

[Steve Mac]

hey steve...
thats sweet , think it'll work for multicells? i understand the theory and you've done a nice clean job. looks like a lil' pink left from the smoothing of the bores.. i was wondering if you did a before and after measurement? love your system..i say go big or go home

The thing is...because it's reversible and because it takes a coupla hours...
I say go ahead and experiment with the multi-cells. If it reduces any disturbance
at the lip it should help. Just make sure you do not overlap the lip.
I say that because I foolishly attempted this with bad result.

[Art J.]

The shinny closed cell foam does not have acoustic properties like open cell foam.
Just thinking out loud............................

closed
Armacell 1/2 in. x 6 ft. Tubolit Foam Pipe Insulation - OEP05838 at The Home Depot

open
Thermwell Products Co. Inc. 1-1/4 in. x 3-1/2 ft. Foam Air Conditioner Weatherstrip - AC42H at The Home Depot

[Steve Mac]

The shinny closed cell foam does not have acoustic properties like open cell foam.
Just thinking out loud............................

closed
Armacell 1/2 in. x 6 ft. Tubolit Foam Pipe Insulation - OEP05838 at The Home Depot
open
Thermwell Products Co. Inc. 1-1/4 in. x 3-1/2 ft. Foam Air Conditioner Weatherstrip - AC42H at The Home Depot

It's shiny...not shinny
Anyway...
a) don't believe it's an issue if it extends the flare
b) no data to support that whatever type open cell foam used is "too open"
c) no data to support that whatever type closed cell foam used is "too closed"

But an easy technique for application would make it possible to experiment with
variants of pipe foam(not sure what to do with air conditioner seal) if they
could be sourced... And that keeps the hacker alive and the expense down.

[Art J.]

Not shine-e ?
I never could write or spell correctly anyways and the spell checker lets me down too.
I didn't know if the objective is to increase the flair or to dampen turbulent edges.
I keep open cell foam in my Rube Goldberg box of parts for various damping needs.....

[Steve Mac]

hey steve...
i was wondering if you did a before and after measurement? love your system..i say go big or go home

Just caught this...no I didn't. When I got the horns and saw how rough the insides
were I just decided to not bother even mounting a driver to them until they were cleaned up.