matt_gsxr
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| posted on 4/12/08 at 11:51 AM |
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Silencer purchase question
Hi there,
I understand that manifolds are going to be expensive as they are custom made, but silencers should be fairly general?
Something like a 6inch diameter, ~2ft long stainless repackable item with a rounded pipe coming off at 90degrees should be pretty commonly used. This
should be good enough to bring the noise down for track and SVA. The variable in this would be the inlet pipe diameter, but there are even adapters
for that.
So, how much should I be paying for something of this sort. I have a quote of £200+VAT is this fair, I am surprised there are no group buys on these
things.
Any thoughts appreciated
Matt
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rb968
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| posted on 4/12/08 at 12:16 PM |
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I was intending to buy a standard ish bike can from ebay and then have the expensive manifold etc made to keep the cost down. Is that likely to be too
loud then? If I stay clear of race cans surely it won;t be much noisier than the original bike exhaust?
Rich
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Kriss
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| posted on 4/12/08 at 12:47 PM |
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im in a similar position
I have an R1 2003 FI engine with standard air box, normal kit car BEC manifold with a tiny carbon micron "race" can on the end.
Spits blue flames and was 107 db at 5500 rpm static test
i need a quieter can big time but still stuck with what exactly to get that isnt mega bucks!
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rb968
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| posted on 4/12/08 at 01:06 PM |
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Where did you get your manifold made , was it MK?
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matt_gsxr
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| posted on 4/12/08 at 01:11 PM |
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Rich,
I agree with your theory. But, in practice lots of people have problems with noise with motorbike silencers.
It may be that it is the racier ones that cause the problem, and standard product cans are fine.
I suppose in some cases the bike has dual exhaust, and in this case you will always need to do some magic (that is my situation). Also standard cans
are quite restrictive (I say that only from what I have read). I think original bike-can should be the official locost option.
Matt
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matt_gsxr
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| posted on 4/12/08 at 01:13 PM |
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Kriss,
I am meeting with an exhaust man over the next week, and will ask him what his price for a bulk purchase would be.
We might be able to save a few quid.
Matt
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PAUL FISHER
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| posted on 4/12/08 at 01:46 PM |
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Might be worth giving MK sportscars a call, 01709 816138,they supplied me with a big silencer for my ZX10r,reduced my db reading from 105 to 98,I
think it was around £150..jpg)
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Pdlewis
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| posted on 4/12/08 at 03:41 PM |
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Id be interested in an exhaust if you could get a bulk discount (I need an SVA friendly one)
Build Photo Album
Updated 05/02/2009
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piddy
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| posted on 4/12/08 at 03:54 PM |
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You should be able to get an exhaust can as supplied by MK & Luego for around the £150 mark.
 
Rescued attachment dcp_4705 smal.jpg
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Kriss
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| posted on 4/12/08 at 04:13 PM |
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Thats exactly what I am after paul. Will measure mine up tonigth and give them a call tomorrow, looks fab, is it repackable?
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INDY BIRD
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| posted on 4/12/08 at 04:27 PM |
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Hi
Il be honest with you that lenght of can will nedd repacking very often to keep the noise levels down as the length of the can does determin how quiet
they can get down too,
I have pauls zx10r car now and this needs repacking last time out it tested at just over 101 DB so goes to shopw they need doing often,
the can i have you will see post on bec forum will stay quiter for longer due to its length, 34" main body,
My previous exhaust was similar in length but 5" and at sva measured 97 db,
So althought look expensive if you go to a track day and cant get on for noise levels it would have paid for the better can in the first place,
Still hope you find what you are looking for within your budget
not easy to do ,
Also stainless all over can will much noiser than part ali or ali all over
All the best
Sean
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rb968
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| posted on 4/12/08 at 08:36 PM |
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So am I barking up the wrong tree with a standard can if the zx9 bike is too loud anyway for trackdays. Are we concluding that because of a different
exhaust length or design we need extra silencing /bigger to get noise levels down ? Who's running a bike can and got reasonable noise levels?
Rich
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INDY BIRD
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| posted on 4/12/08 at 09:40 PM |
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Hi
Ive tried several different cans with mixed results,
R1 carbon was around 102 db on a blackbird engine with full flow filter on and around 100 db on a zx12r,
but in the end went for this on my indy (pic attached) 7" ali down to 97 db measured at brands hatch,
prob with bike cans seem to be ok at first but then just get louder
only my opionion sure some one will share theres soon,
pic attached of can on mk bird
 
Rescued attachment indy side aero exhaust.jpg
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matt_gsxr
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| posted on 5/12/08 at 11:50 AM |
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I will ask around whether the normal suspects can offer a bulk buy (x10) on a 6 inch diameter, 30inch long (silencer section), stainless steel,
repackable exhaust, with an SVA compatible outlet.
The list price on one of these is
£200+VAT wunoff
£190+VAT cbs (including shipping)
if there are any worthwhile discounts available I will start a list of interested parties.
Matt
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bigfoot4616
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| posted on 5/12/08 at 09:32 PM |
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INDY BIRD
where did you get that silencer from, and how long is it?
cheers
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matt_gsxr
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| posted on 5/12/08 at 10:12 PM |
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Best priced on a 6 inch diameter, stainless steel, repackable exhaust, with an SVA compatible outlet.
seems to be
£150+VAT + £10 shipping (optional) from MK sportscars
They have suggested a reasonable discount based on a group buy of x10
So if we can get together a list of 10 people who can commit to this then that would be good. Please post interest.
Thanks,
Matt
List:
Me x1
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Kriss
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| posted on 6/12/08 at 11:52 AM |
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2. kriss
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INDY BIRD
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| posted on 7/12/08 at 10:19 AM |
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Hi
The can is on my old car sold about 2 years ago,
the can was made in ashton i think cant remember the company name if i do i will u2u you,
was a 7" can 30" long made fron poloshed ali,
thanks
sean
ps cost was £370 fitted again not cheap but on my car and brothers zx12r indy gained around 15bhp and was very quiet can,
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bigfoot4616
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| posted on 7/12/08 at 07:53 PM |
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cheers.
i'm trying to knock of a couple of db's, was measured at 100 recently with my 5" silencer. problem i have is not much room for more
length.
100 db was at 8500, i went slightly past the 8200 he wanted but i dont think 300 revs will affect it much
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INDY BIRD
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| posted on 7/12/08 at 09:15 PM |
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Bigfoot
What engine is it for at that rpm then persume bec ???
If cant make a can any bigger what about induction noise or metal side pannels resonaiting??? have you checked these??
Thanks
Sean
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matt_gsxr
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| posted on 7/12/08 at 09:29 PM |
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so.
1. Me
2. Kriss
Doesn't look like we will get to 10 does it
Matt
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Kriss
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| posted on 7/12/08 at 10:51 PM |
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my mate on the sestfield forum said there is a group buy on the for cb (or someone like that" exhuast? £204 he seems to recal made to order.
will try get some more info
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bigfoot4616
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| posted on 7/12/08 at 11:16 PM |
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quote:
Originally posted by INDY BIRD
Bigfoot
What engine is it for at that rpm then persume bec ???
If cant make a can any bigger what about induction noise or metal side pannels resonaiting??? have you checked these??
Thanks
Sean
its a fireblade.
induction noise shouldn't be a problem as i have an airbox fitted, don't know about panels resonating.
i will be able to go a little bit longer on the can but most of the larger diameter ones i've seen have been to long.
problem i have now is that i forgot to check how much room there was before pulling the car apart so untill it goes back together i'm just
looking out for different options
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matt_gsxr
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| posted on 8/12/08 at 09:57 AM |
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Group buy silencer MK
Hi there,
So if we can gtup to 10 we can get a price of
£150 inc VAT + £10 delivery (if necessary). This is a reduction of 15% over buying individually, for what is already a good value silencer.
specification is 6inch diameter, stainless, repackable.
This is for the one pictured previously
A £22 saving isn't much, but I think its worth it. And £150 is a lot less than £204
Matt
1. Matt
2. Kriss
3. Dan
4. Nathan
5.
.jpg)
[Edited on 8/12/08 by matt_gsxr]
[Edited on 11/12/08 by matt_gsxr]
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Dan
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| posted on 8/12/08 at 05:17 PM |
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silenced
Well iam up for a purchase at that price
10 seems a tall order though
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