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Author will this increase power?
chris_uk
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Registered: 8th Jul 03
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11th Feb 05 at 22:41   View Garage View User's Profile U2U Member Reply With Quote
shortening the length the exhaust gasses have to travel.

ie, making your exhaust shorter..

or example mke the exhaust come out of the side of the car behind the front wheels?
Matt H
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11th Feb 05 at 22:43   View User's Profile U2U Member Reply With Quote
Stop being gay
vxsri
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11th Feb 05 at 22:51   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Matt H
Stop being gay


helpful. :lol:
SteveW
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11th Feb 05 at 22:52   View User's Profile U2U Member Reply With Quote
im guessing matt meant

"i am thinking this would not increase your BHP in any way "
Fad
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11th Feb 05 at 22:52   View User's Profile U2U Member Reply With Quote
no surely it'd reduce back pressure with is required on NA cars and a loss if anything? could be talking out f my arse here though
Drew
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11th Feb 05 at 22:53   View User's Profile U2U Member Reply With Quote
why not take off ur exhaust system, and for good measure, ditch the manifold too
vibrio
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11th Feb 05 at 22:53   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by chris_uk
shortening the length the exhaust gasses have to travel.

ie, making your exhaust shorter..

or example mke the exhaust come out of the side of the car behind the front wheels?


please delete this thread and go to bed without supper
vxsri
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11th Feb 05 at 22:54   View User's Profile U2U Member Reply With Quote
lol

i bet he's sorry he asked!
Ian
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11th Feb 05 at 22:54   View Garage View User's Profile U2U Member Reply With Quote
Same net effect as increasing bore so yes, in most cases. Can lose power though in the same way that an exhaust which is too large will due to the disproportionate reduction in back pressure.

Increasing bore is easier and you can keep the cat, and it'll also warm up quick enough if you keep back pressure before the mid box which will be less hassle at MOT time.
Drew
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11th Feb 05 at 22:55   View User's Profile U2U Member Reply With Quote
ian - can u do an ip check with pug nut on this one?
Matt H
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11th Feb 05 at 22:57   View User's Profile U2U Member Reply With Quote
Sly_SRi
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11th Feb 05 at 23:28   View Garage View User's Profile U2U Member Reply With Quote
But surely if you get the engine set up it would run more Bhp, because idealy an engine wants to run without any exhaust at all. Think of a dragster (i realize they are not NA)

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Drew
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11th Feb 05 at 23:30   View User's Profile U2U Member Reply With Quote
no, a car does not want to run without an exhaust, as mentioned above, u lose backpressure which aint good
vibrio
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11th Feb 05 at 23:46   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Sly_SRi
But surely if you get the engine set up it would run more Bhp, because idealy an engine wants to run without any exhaust at all. Think of a dragster (i realize they are not NA)


yes if it is mapped then you'd see a gain but they require back pressure for low down torque. also if the major restriction is further back than the point you cut it at it's not going to do much good

 
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