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Old 31-03-2008, 06:46 PM   #1
Andy_S
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Ok so here's some bits I did recently.

Timing Splitter & Towing Eye:



2.5" Stainless Exhaust System (Made by me)





and a choice of tailpipes ........ one for noisy & one for scrutineering



I've got the Fire Extinguisher on order, so I think that's everything:



Although I really fancy one of these (the one on the right):

[/b]
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Old 31-03-2008, 06:58 PM   #2
Marcus Nordblom
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looking beefy! Better top end?

//marcus
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Old 31-03-2008, 07:15 PM   #3
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Looking good
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Old 31-03-2008, 07:26 PM   #4
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Like it Andy. where did you get the inline silencer, It looks like a slip on job? just wot i need as I'm running out of paracetamol. Mines got an upswept oval jobby for that "full race note" according to the reciept. It's way too loud. My neighbours got a Bonnie with straight through and it doesn't even come close

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Old 31-03-2008, 07:41 PM   #5
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The old smaller bore (1.75") system should have had the peak torque lower down the revs, so I guess I've moved that to higher revs now.

Hopefully that gets me a better top end, but to be honest I just like the look of the big bore tubes

I made it from components I bought from these guys :

http://cgi.ebay.co.uk/T304-Stainless...QQcmdZViewItem

The single pipe rear box is made by my own fair hands from some of the tube which I slash cut & welded into a 6" X 450mm round silencer.

I know what you mean about needing headache tablets, the twin pipes act as amplifiers not silencers
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Old 31-03-2008, 07:53 PM   #6
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I got my exhaust parts from the same place, I thought the front box looked familiar.
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Old 31-03-2008, 08:00 PM   #7
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Looking good but I dont think itl pass the noise test
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Old 31-03-2008, 08:04 PM   #8
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Hmmmm, so i take it the front box makes it a lot more respectable then I was considering that but wasn't sure if it was a waste of money or not. Like the spotty peg bucket BTW
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Old 31-03-2008, 08:15 PM   #9
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Mine was alot quieter with the front box. My dad borrowed a meter from a mate and mine read 86ish dB at 3500RPM, the highest I could get it was just over 90dB. Unfortunately I don't have any readings before I added the silencer.
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Old 31-03-2008, 08:21 PM   #10
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I don't think the front silencer makes a huge difference (although Smurfy's comments suggest it is), I reckon it's the rear one that's doing most of the silencing ......... bigger is better and all that.

He deffinately wouldn't pass the noise test with the twin pipes, but with the single I'm reasonably confident. The two boxes are very different in construction, the twin is a totally hollow, whereas the single is a perforated through pipe with silencing 'wadding' around it.
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Old 31-03-2008, 09:18 PM   #11
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Looking good Andy you look like your almost there.

Paul
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Old 01-04-2008, 02:53 PM   #12
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The noise limit for sprinting was 110db in the 2007 blue book, has it changed this year?? I havnt got my liscence through yet.

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Old 01-04-2008, 03:12 PM   #13
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It depends which approach to sound testing that the scrutineer takes.

There are two methods of testing (so says the blue book);

i) At a 0.5m radius from the exhaust with the noise meter between 0.5 & 1m off the ground then max for Libra cars is 98db.

ii) Where the exhaust is not accessible, the test can be done at a 2m radius from the centre of the vehicle 1.2m off the ground and a max of 110db for for Libra cars.

There are quite a few bike engined Westfields at the Sprints and they run some really beefy looking silencers to keep the noise down, so maybe you will need to run with quite a substantial can too.

Just to be on the safe side order an analogue noise meter (got mine for 23 off e-bay) so you can do some 'testing'
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Old 01-04-2008, 08:03 PM   #14
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Quote:
Originally Posted by Andy_S

Just to be on the safe side order an analogue noise meter (got mine for 23 off e-bay) so you can do some 'testing' & I'll look in my 'blue-book' tonight & confirm the allowable noise levels.
Did you really??? 'Hands on hips, foot tapping'
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Old 01-04-2008, 08:55 PM   #15
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He registered your complaint at 92dB with it
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