spunky
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 posted on 23/4/04 at 08:05 AM |
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induction roar...
Chaps,
A quick question.
There has several mentions of induction noise while undergoing SVA. What are the implications regarding the test.
I understood the only noise test was 101dB at the exhaust.
Reason I ask is I have two 62mm throttle bodies howling 10" behind my left ear...
John
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David Jenkins
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| posted on 23/4/04 at 08:16 AM |
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The only test they do is to stand a noise meter a fixed distance from the exhaust outlet, at 30 degrees to where it's pointing. If this meter
reads over the limit then you've failed, whatever the source of the noise!
Incidentally, rally drivers have problems with their noisy gearboxes (straight-cut gears)! They get noise tested with their heels up and gears
selected.
David
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colibriman
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| posted on 23/4/04 at 09:17 AM |
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2 thottle bodies? what engine you using...a bike twin?
i looooove the sound of a big twin and wishing i had picked one for my current project.....next time then......!
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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timcrasher
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| posted on 23/4/04 at 09:48 AM |
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engine choice
Yeh, Spunky,
Is that a VTR/ Sp1 engine in your beast ?
It will sound like a lancaster bomber taking off when your flat out down the road!!
Awesome
Cheers
Tim
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spunky
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| posted on 23/4/04 at 10:50 AM |
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It is an SP1 and it does sound a touch 'fruity'.
Gotta fit a different zorst and cat for SVA.
Reckon you'll hear me going up Beacon Hill Tim...
John
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Brooky
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| posted on 23/4/04 at 01:28 PM |
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They run the engine to 3/4 revs and test the noise then, but when i went for my sva the tacho was reading wrong. For some reason it thought i had 3
cylinders not four so it was reading high and when they revved it to 7000 sih rpm it was actually only doing 5500 - much quieter. i soon fixed the
error when i left the sva centre (if you know what i mean )
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alister667
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| posted on 23/4/04 at 07:48 PM |
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Ahhhhhh! Interesting. Tell me just out of interest Brooky, what engine did you use, and where abouts did you look to 'solve' this 3/4
revving tacho problem?
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Kitlooney1000
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| posted on 23/4/04 at 08:36 PM |
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have the same problem on my revcounter too. it reads 6000 rpm at 70 mph, but the engine is not revving hard, so how to fix please.............?
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TPG
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| posted on 23/4/04 at 09:36 PM |
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Sva rev counter
At Beveley they use an independent clip on job rev' counter on one of the 'leads.........
..Which was nice..
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alister667
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| posted on 24/4/04 at 02:04 PM |
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quote:
Originally posted by TPG
At Beveley they use an independent clip on job rev' counter on one of the 'leads.........
The don't do that in N. Ireland. I'm dying to know how this is done. For academic reasons only of course!
http://members.lycos.co.uk/alister667/
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Brooky
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| posted on 24/4/04 at 03:13 PM |
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Its a fireblade engine and it wasnt really a problem, the tacho has a button to tell it how many cylinders the engine has - it then counts that many
pulse etc. I simply told it i had a 3 cylinder engine for a while thats all. When i had passed i retold it i had a 4 cylinder engine. It was a scam to
pass the noise regs.
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alister667
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| posted on 24/4/04 at 06:08 PM |
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I take it the tacho is not part of a set of standard blade clocks?
http://members.lycos.co.uk/alister667/
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