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#263583 - 07/08/09 3:06 am Sweetening the exhaust note  
Joined: Feb 2006
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Florida TR6 Offline
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Florida TR6  Offline
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Florida
In the wonderful book Big Sid's Vincati, there's the following comment (page 256) regarding the great Vincent tuner Sid Biberman using a trick he learned from Denis Manning (BUB company):
Quote:
Sid told Denis that he still used an old trick of his - pouring a can of classic Coke down the muffler to sweeten the exhaust note


1. Anyone ever tried this for a vertical twin stock or repo muffler and what was the result (mellower sound, no change, negative results, a sticky mess)?
2. Regardless, a Mr. Wizard question: how the heck can pouring Coke through a muffler alter the exhaust note -- seemingly, though not so stated in the book, the change in exhaust note is not short-lived or SId and Denis wouldn't bother to do it??


"For every problem, there is a solution that is simple, neat, and wrong." H.L.MENCKEN
'06 T100 Bonneville
'70 TR6 Bitsa, Pazon EI
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#263609 - 07/08/09 8:41 am Re: Sweetening the exhaust note [Re: Florida TR6]  
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Ger B Offline
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Ger B  Offline
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NL
Try this in the evening of March the 31st, leave overnight and start the bike the next morning... grin


Ger B

#263879 - 07/09/09 6:45 pm Re: Sweetening the exhaust note [Re: Ger B]  
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snowbeard Offline
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US citizen in Lisbon, Portugal
I think someone's having you on there. it could be a joke, like putting that NOS energy drink in your gas tank. (don't do this either)

it could be something along the lines of eating out the packing a bit, coke is an acid, and might break down the steel wool type packing?

maybe the sugar blocks up some of the spaces? or maybe it just gurgles in there until it dries?

whatever it is, I certainly don't plan on trying it, but let us know how it went, eh? wink


=================
/1957 BSA A10 Spitfire Scrambler (in a friend's shed)
/1960 BSA Super Rocket Basket Case (in the attic!)
/1987 BMW K100LT nekkid
#263907 - 07/09/09 9:58 pm Re: Sweetening the exhaust note [Re: snowbeard]  
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R Model Tony Offline
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White Rock, BC
Classic Coke should only be poured into RUM. Unless it's aged rum, in which case the rum should be poured into ice ;-). Tony

#263914 - 07/09/09 10:18 pm Re: Sweetening the exhaust note [Re: R Model Tony]  
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Alex Online content
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Alex  Online Content

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Seattle
Maybe it was supposed to sweeten the SMELL of your exhaust? Do you think I'm KIDDING?


A smattering:
'53 Gold Flash
'67 Royal Star
'71 Rickman Metisse
'40 Silver Star
'37 Rudge Special
sixtyseventy Lightboltrocket road racer...and many more.
#263967 - 07/10/09 9:49 am Re: Sweetening the exhaust note [Re: Ger B]  
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Tiger Offline
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Tiger  Offline
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Melbourne Australia
Originally Posted By: Ger
Try this in the evening of March the 31st, leave overnight and start the bike the next morning... grin


I understood Ger, and thought it quite witty.


1969 TR6R
7.62 x 51 is not a maths puzzle.
#263978 - 07/10/09 12:35 pm Re: Sweetening the exhaust note [Re: Tiger]  
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Ger B Offline
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Ger B  Offline
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NL
Quote:
which case the rum should be poured into ice

Listen very carefully I shall say zis only one more time: Aged rums as aged single malts are not poured onto ice.
They are carefully poured into crystal, slowly so no air enters.
Than, and only than, one small teaspoon of fresh well water is added with either a silver or an ivory spoon, and allowed to disperge on it's own force. whisky whisky whisky

Ice... grumble grumble...

Quote:
I understood Ger,


I think you were the only one so far laughing


Ger B

#264018 - 07/10/09 5:13 pm Re: Sweetening the exhaust note [Re: Ger B]  
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R Model Tony Offline
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White Rock, BC
"Ice... grumble grumble..."

Geeze Ger...I was trying to be witty...

Guess it didn't work ;-)

Last night my sip of Moorleys went directly into a shot glass, (no crystal) and then slowly across my tongue. The only thing I put ice in is a martini shaker. :-)

I think the best way to "sweeten" the exhaust note is to add a little Castrol R to the fuel. Unfortunately YOU can't smell it...only those riding behind.

Sorry for hijacking the thread guys...

Tony

#264022 - 07/10/09 5:35 pm Re: Sweetening the exhaust note [Re: R Model Tony]  
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Ger B Offline
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Ger B  Offline
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NL
Quote:
Geeze Ger...I was trying to be witty


So was I... Guess it didn't work laughing


Ger B

#264075 - 07/11/09 2:36 am Re: Sweetening the exhaust note [Re: Ger B]  
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Tiger Offline
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Melbourne Australia
I think the best way to "sweeten" the exhaust note is to add a little Castrol R to the fuel. Unfortunately YOU can't smell it...only those riding behind.

Last week I was given a sealed 1L bottle of "Castrol A747" which is apparently a castor/synthetic high performance two stroke lubricant.

To be run at 50:1 in water cooled engines that operate at 12-13,000 RPM and between 16-25:1 in engines that run between 12-18,000RPM.

Very tempted to try 200:1 in the tank of the TR6.


1969 TR6R
7.62 x 51 is not a maths puzzle.
#271640 - 08/23/09 2:39 pm Re: Sweetening the exhaust note [Re: Tiger]  
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Tigerguy Offline
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USA
This reminds me of another little known racer trick from back in the day; strip your bike down to the bare frame and immerse it in a bath of Diet Coke for a month. It will be several pounds lighter afterwards, giving you a competitive advantage. Judges and race stewards will be oblivious, who weighs a frame? Note that this only works with Diet Coke, if you use regular Coke by mistake the frame will become heavier. You have been warned.

I once cut a piece of Swiss cheese to the exact size of my rear sprocket. I then laid the cheese on the sprocket and poured Diet Coke in the holes. The cheese resisted the Diet Coke but the holes were neatly eaten through the sprocket - a perfect lightening job without using a drill press!

#271746 - 08/24/09 12:50 am Re: Sweetening the exhaust note [Re: Tigerguy]  
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Bob~NJ Offline
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Bob~NJ  Offline
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Camden NJ USA
Hi all,
Just to keep the thread on the technical side of things it has to be kept in mind that a can of Coke will sink in water but a can of Diet Coke will float.

Cheers~Bob


A65LB
#271780 - 08/24/09 12:00 pm Re: Sweetening the exhaust note [Re: Bob~NJ]  
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76degree-triumph Offline
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melbourne, australia
Evigee, A good egg sinks and a rotten or shabby one floats. Is this your way of saying leaded Coke with sugar is better than Diet/Zero with no sugar, but now with calorie free untested chemicals? I stick to the leaded version, sugar cain must be better than flavour enhancer 100-999.
P.S I have tried to disolve a tooth in coke (my son's whilst asleep waiting for the tooth fairy)over night and it appeared as normal the next morning. So I came to the conclusion that either Coke does not rot teeth or the tooth fairy is a lie.
Please be gentle on me as I've been good all year and waiting for Christmas.
Cheers, Chris.


1950 Speed Twin outfit
1951 Thunderbird outfit (76 degree racebike, or is it 90 deg now?)
1955 BSA D3 minibike outfit
Triumph solo's
#271795 - 08/24/09 3:52 pm Re: Sweetening the exhaust note [Re: 76degree-triumph]  
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hh Offline
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British Columbia
All Coke is poison and it definitely eats teeth. An overnight test without careful weighing won't demonstrate this however. Read this:

http://news.softpedia.com/news/Cola-Destroys-Your-Teeth-50000.shtml

Regarding diet vs. "regular" sugar Coke: diet contains a synthetic neurotoxin, aspartame; regular Coke contains high fructose corn syrup which causes diabetes and obesity and also contains the neurotoxin mercury. And if that weren't enough, it's mostly from genetically modifed corn which has been shown to disturb normal human metabolism and immune function and will likely be shown to be much worse than originally believed as actual test results on humans are studied in the future.

So as the saying goes: choose your poison, or not (my choice.)


"Beer is proof that God loves us and wants us to be happy" - Benjamin Franklin
#271813 - 08/24/09 5:28 pm Re: Sweetening the exhaust note [Re: hh]  
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Western Oregon
At our Costco I noticed they sell cases of Coke made in Mexico. The ingredients list showed cane sugar instead of the corn syrup. I still didn't buy it, 'cause I had no rum.

I like beer better than I do Coke.


Ed
1970 Bonneville
#271816 - 08/24/09 5:47 pm Re: Sweetening the exhaust note [Re: enigmaT120]  
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hh Offline
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hh  Offline
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British Columbia
Here's a 2004 story about the Mexican Coke:

http://www.signonsandiego.com/uniontrib/20041109/news_1b9mexcoke.html

Interesting that it's making it all the way to Oregon now. With a pH of 2.5 (similar to regular table vinegar), compared to battery acid at 1, I still wouldn't recommend it for human consumption in beverage quantities regardless of the sweetener.


"Beer is proof that God loves us and wants us to be happy" - Benjamin Franklin
#271860 - 08/24/09 10:45 pm Re: Sweetening the exhaust note [Re: Florida TR6]  
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Britbodger R.I.P. Offline
In Remembrance
Britbodger R.I.P.  Offline
In Remembrance

Joined: Aug 2001
Posts: 3,913
Houston Texas
Dunno about the Coke thing but, IMHO, the absorption type mufflers have a much sweeter sound than do the baffled type the latter sounding kinda harsh whereas the former have a throatier sound.

Dry frame Triumphs came stock with absorption type (made by Burgess I think). Not sure about later model Triumphs.

My 2c

Last edited by Britbodger; 08/24/09 10:46 pm.

Moderated by  Alan_nc 


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