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Nov 27, 2012 19:12:24 GMT
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Been reading from exhaust people that the bmw 520i rear exhaust box is restrictive and as I know heavy.
Considering deleting rear box and either fitting cherry bomb or straight pipe giving me options for bolt in baffles
Doing this after getting mot
Anyone took out rear box completely and does or did it affect general running etc of engine/ noise etc.
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Last Edit: Dec 4, 2012 19:04:42 GMT by jeepmad
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Nov 27, 2012 19:39:08 GMT
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It'll really depend on the car - some cars can lose the rear box and not sound all that loud, whereas some will be undriveably noisy. If the box is restrictive, this suggests that it's restrictive for a reason - either to limit power a bit to help sell the 525 or whatever, or more likely to reduce the noise. BMW aren't stupid!
Taking the box off and replacing it with a cherrybomb (or a larger and better silencing straight through type box) will remove pretty much all the flow restriction. It's very unlikely to make the car run poorly, but also unlikely to make it a lot faster.
If the box is removable, just take it off altogether and see if the car goes any better.
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Nov 27, 2012 20:24:36 GMT
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that all sounds logical in many ways
agree bmw are quality engineers hence asking questions in advance of any modding if at all any
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rodney
Posted a lot
https://www.facebook.com/RD-vehicle-transport-and-recovery-services-525622614268010/
Posts: 1,677
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Nov 27, 2012 22:15:46 GMT
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ive got a stainless 325i exhaust for sale  |
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Last Edit: Nov 27, 2012 22:53:30 GMT by rodney
facebook: rodney dean / rd transport  |
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rodney
Posted a lot
https://www.facebook.com/RD-vehicle-transport-and-recovery-services-525622614268010/
Posts: 1,677
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Nov 27, 2012 22:52:52 GMT
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facebook: rodney dean / rd transport |
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decided on short back box with about 3 inch outlet or cherry bomb
any going cheap laying in your garage?
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itll sound wibblepoo don't do it buy a system off ebay
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