J666AYP
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| posted on 21/3/21 at 11:24 PM |
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Exhaust silencer diameter Q
Hi all,
Just in the process of ordering the exhaust silencer and gubbins for finishing the exhaust system off. Just wondering if I would be better off with a
6" or 7" diameter silencer? (3" bore and 18" long).
Thanks,
J
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ianhurley20
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| posted on 22/3/21 at 08:38 AM |
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I simply went for the biggest straight through silencer I could fit - 24" x 7" 52mm bore - car sounded great, only got noisy when on full
throttle but a lovely noise the rest of the time and 5db below legal limit at IVA
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big_wasa
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| posted on 22/3/21 at 11:34 AM |
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6x20 with a 2.5" bore on mine its a very quiet with the turbo and a cat.
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simon04
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| posted on 22/3/21 at 09:10 PM |
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turbo motors are normally quieter than Nas.
6 inch is a good big size and about 600 to 700 long
Repackable if poss
HAve a look at tiger ot striker or the other big boys like westfield and caterham
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J666AYP
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| posted on 23/3/21 at 08:21 PM |
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Thanks for the input gents, appreciated.
Just to confirm does a 'Q' plate need a cat for the IVA? Seem to be getting conflicting information online?
J
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obfripper
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| posted on 23/3/21 at 08:51 PM |
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quote:
Originally posted by J666AYP
Thanks for the input gents, appreciated.
Just to confirm does a 'Q' plate need a cat for the IVA? Seem to be getting conflicting information online?
J
For the iva you'll need to pass the test applicable for your engine, that should be a cat emissions test for your merc engine unless it's
pre aug 1994 which i guess is unlikely.
As the donor was capable of passing a cat test, so long as you have a reasonable size/quality cat fitted there shouldn't be a problem, the
original one being the best option if you still have it.
Once iva is done, if you're on a 'q' plate, then for mot you will only require a visual check.
Dave
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J666AYP
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| posted on 23/3/21 at 11:46 PM |
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Thanks Dave,
Thats cleared up the confusion for me 
J
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