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Author Topic: hitchcock's efi silencer.  (Read 869 times)

wildbill

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hitchcock's efi silencer.
« on: August 20, 2013, 02:11:31 AM »
my second efi silence purchased from hitchcock's uk does not sound as good as the original one. especially under load on the hills.you can hear number two on my B5 video.
although both units looked identical the internal inspection revealed that once the baffle was removed the exhaust outlet it was blocked by a metal plate with a quantity of perforated holes.
the total length of this baffle was about 6 or 7 inches and the baffle on the original muffler was a lot longer....more like 10 inches.
when i get myself a longer/larger drill bit i plan to drill out a few of the perforated holes and see if i get the deepness of note which the original exhaust had.
i might even drill the whole lot out and if i strike any drama i can again order the long baffle from hitchcocks or they may have a universal fit on the net.
2011 C5 black/chrome
2012 C5 maroon/chrome 
2013 B5 black
2014 Continental gt
2014 C5 tan/cheery - upgrades and work in progress

2004 mazda-speed miata
2001 bmw z3 2.2

High On Octane

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Re: hitchcock's efi silencer.
« Reply #1 on: August 20, 2013, 02:31:39 AM »
There's all kinds of aftermarket bolt-in baffles available on ebay for cheap.

Scottie
Scottie J
Denver, CO

1958 Enfield/Indian Trailblazer

wildbill

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Re: hitchcock's efi silencer.
« Reply #2 on: August 20, 2013, 02:46:38 AM »
forgot the photo -thanks for the ebay tip

2011 C5 black/chrome
2012 C5 maroon/chrome 
2013 B5 black
2014 Continental gt
2014 C5 tan/cheery - upgrades and work in progress

2004 mazda-speed miata
2001 bmw z3 2.2

Ice

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Re: hitchcock's efi silencer.
« Reply #3 on: August 20, 2013, 05:12:13 AM »
Oh-my-God, how is the poor bike supposed to exhale through that! ?

Wildbill, please for the good of the order do post your progress and findings.

Cheers in advance.
I can break it better,,,,at night, in the rain, on the trail,, 20 miles from nowhere.

REA #136

"TIMEX", the '06 Iron Barrel Military that takes me everywhere I want to go... and some places I shouldn't.

D the D

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Re: hitchcock's efi silencer.
« Reply #4 on: August 20, 2013, 05:38:52 AM »
That is one serious obstruction!  I had to take a second look 'cause at first I thought it was a spark arrester, but even a lawn  mower has more open breathing than that.
'07 Iron Barrel Military (Deceased 14 September, 2013)
2014 Yamaha Bolt R Spec V-Twin
1975 XLCH

wildbill

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Re: hitchcock's efi silencer.
« Reply #5 on: August 20, 2013, 05:57:11 AM »
plus the baffle. as soon as i get the long drill bit - i will open it out.
surprisingly it did run better with this on when compared to the standard job but i felt it could do a lot better
2011 C5 black/chrome
2012 C5 maroon/chrome 
2013 B5 black
2014 Continental gt
2014 C5 tan/cheery - upgrades and work in progress

2004 mazda-speed miata
2001 bmw z3 2.2

mattsz

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Re: hitchcock's efi silencer.
« Reply #6 on: August 20, 2013, 09:26:07 AM »
Huh.  I posted the same pic of my EFI silencer, and nobody said anything!  ;D

Curious to see what happens if you mod this - deep exhaust would be nice, but I don't want more decibels!

JVS

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Re: hitchcock's efi silencer.
« Reply #7 on: August 20, 2013, 09:38:14 AM »
That is exactly like my EFI silencer  :-X It is loud enough, not sure about the deep tone though. It's kind of the blatty type, but still good. It will be interesting to notice the difference once wildbill goes ahead with this little project. Another video with the modified silencer will be great. I'm thinking of getting a long bottle hollow silencer from RE's homeland sometime in the future..as the short bottle hollow was quite bad at higher RPMs. Anyways, let us see how this will turn out.
Sons continuing wars, our fathers were enemies


wildbill

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Re: hitchcock's efi silencer.
« Reply #8 on: August 20, 2013, 10:16:34 AM »
check out this video link. my bikes were just there for the photo session but i dubbed the exhaust note from the black one to the video.
it's this black bike which had the efi muffler with no perforated holes in the outlet.

http://www.youtube.com/watch?feature=player_detailpage&v=YooHlR_g-Ls


2011 C5 black/chrome
2012 C5 maroon/chrome 
2013 B5 black
2014 Continental gt
2014 C5 tan/cheery - upgrades and work in progress

2004 mazda-speed miata
2001 bmw z3 2.2

wildbill

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Re: hitchcock's efi silencer.
« Reply #9 on: August 20, 2013, 10:23:33 AM »
same bike standard muffler

http://www.youtube.com/watch?v=et0nhhI09qE&feature=player_detailpage

same bike with the first efi muffler and you can hear the difference

http://www.youtube.com/watch?feature=player_detailpage&v=CaDmfvAcZYU

2011 C5 black/chrome
2012 C5 maroon/chrome 
2013 B5 black
2014 Continental gt
2014 C5 tan/cheery - upgrades and work in progress

2004 mazda-speed miata
2001 bmw z3 2.2

sparklow

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Re: hitchcock's efi silencer.
« Reply #10 on: August 20, 2013, 03:24:44 PM »
I had the EFI silencer dealer installed at time of delivery on my 2011 B5. This was in 2012 as I bought the bike as a leftover model. I have had it off once myself and I can report that it has no baffle which fully obstructs because I could see light through the muffler when held up to the light. The sound and performance of the bike are great. There have got top be multiple design variations of the EFI type silencer out there!
« Last Edit: August 20, 2013, 04:23:02 PM by sparklow »
2011 B5
B5, like a Model T, comes in any color, as long as it's black.

The_Rigger

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Re: hitchcock's efi silencer.
« Reply #11 on: August 20, 2013, 03:47:20 PM »
It is loud enough, not sure about the deep tone though. It's kind of the blatty type, but still good.

SAme note I get with Hitchcock's upswept system... Probably the same muffler on a different pipe.  I wish it were just a touch quieter, but in general I like it. Far and away better than what comes out the OEM telephone pole...
-Dave
2012 C5 Special
Central Michigan, USA (when I'm not working somewhere else)

barenekd

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Re: hitchcock's efi silencer.
« Reply #12 on: August 21, 2013, 12:57:52 AM »
Mine was similar to Sparklow's. Had a great sound and ran pretty well, although the Dominator had more power, but was a lot louder. Cold be repacked but lost some power.  The Goldstar muffler was pretty decent performer too.
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Ice

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Re: hitchcock's efi silencer.
« Reply #13 on: September 04, 2013, 04:13:01 AM »
wildbill, any progress yet ?
I can break it better,,,,at night, in the rain, on the trail,, 20 miles from nowhere.

REA #136

"TIMEX", the '06 Iron Barrel Military that takes me everywhere I want to go... and some places I shouldn't.