Jon Ison
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| posted on 15/3/14 at 11:26 AM |
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Good idea, mad idea update with a few photos
Prototype under way,
Slot on bolt head so I know where butterfly is...
 
Fully closed
1/2 open
Going to try it on car later today, will update and confirm, good idea or bad idea.
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40inches
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| posted on 15/3/14 at 11:36 AM |
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I have a Decibel Meter if you want to borrow it Jon? I'm in New Whittington.
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Slimy38
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| posted on 15/3/14 at 11:39 AM |
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I vaguely remember you were talking about a locking nut to fix it in place, where will that end up? And I'm guessing it won't be a nyloc
nut, I can't imagine it staying locked once the exhaust is up to temperature!
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Jon Ison
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| posted on 15/3/14 at 01:01 PM |
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there are two, one above and one below, just ran it up acustafil still needs to fully expand but just with it in place the noise as come down, 101 in
iPhone app at 8k revs down to 97 with it closed, seems like result.
40inches u2u me a number to contact you on, a proper meter as to be better than iPhone app
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Jon Ison
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| posted on 15/3/14 at 01:15 PM |
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Can you spot the deliberate mistake ?
I put the bolt in wrong way around, the bold head is on the underside, now the disc is welded to the bolt cant move it, never mind.
101 max fully open on iPhone app at 8k revs, even with it in place but open there is a definite difference from before, maybe it altering flow enough
to make more use of the silencer, dunno ?
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