exhaust flap/valve/butterfly
29 September 2010, 11:01 AM
#1
exhaust flap/valve/butterfly
as above really
on some cars they have a butterfly type valve in the exhaust and this opens up with the different amount of back pressure.
so when you are cruising along the valve is part closed, and when you put uour foot down, the pressure in the exhaust increases and the valve opens up.
is there anything like this on the market a all?
on some cars they have a butterfly type valve in the exhaust and this opens up with the different amount of back pressure.
so when you are cruising along the valve is part closed, and when you put uour foot down, the pressure in the exhaust increases and the valve opens up.
is there anything like this on the market a all?
29 September 2010, 11:18 AM
#3
i think they did, but from what i remember it was silly expensive.
apexi use to do one as well a long time ago
the reasion is, that i love my exhaust on my car (custom made titanium one) but it is just abit tooo loud for me now, mainly when doing motorways etc.
would putting a box in the centre section make it quiter?
apexi use to do one as well a long time ago
the reasion is, that i love my exhaust on my car (custom made titanium one) but it is just abit tooo loud for me now, mainly when doing motorways etc.
would putting a box in the centre section make it quiter?
29 September 2010, 11:26 AM
#5
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yes mate. putting an extra box in the center section will make your car quieter. it shouldnt affect the performance much. but just to let you know "the less amount of boxes the less restrictive the flow is"
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29 September 2010, 05:37 PM
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I've got a full titanium system and made enquiries a little while ago about doing welding on it... you're gonna struggle mate!
I had a butterfly valve on my 200SX which fitted between exhaust sections and was manually controlled from within the car by pulling a lever to either open and allow full flow, or close to restric flow and completely eliminate the noise... and power. But for motorways it was brilliant.
It was on the car already so couldnt help you with where to get one from... and that car came direct from Japan so I'd start the search there, lol
I had a butterfly valve on my 200SX which fitted between exhaust sections and was manually controlled from within the car by pulling a lever to either open and allow full flow, or close to restric flow and completely eliminate the noise... and power. But for motorways it was brilliant.
It was on the car already so couldnt help you with where to get one from... and that car came direct from Japan so I'd start the search there, lol
29 September 2010, 08:54 PM
#10
a bung is a option, as use to have one in my old nur spec, but it was a pain when you wanted to put it in and out etc.
think i am gonna try and look out for a butterfly valve, or if anyone has blue prints on how they are made, ill get one made up.
phoned powerflow today and they wanted £130 for a sentre section with a box in. sound about right?
think i am gonna try and look out for a butterfly valve, or if anyone has blue prints on how they are made, ill get one made up.
phoned powerflow today and they wanted £130 for a sentre section with a box in. sound about right?
29 September 2010, 09:09 PM
#11
have found this on ebay (the apexi butterfly)
what what size would i need? i have a 3 inch pipe. (76m i think) so the 80mm and trim down?
http://cgi.ebay.com/ebaymotors/Apexi...Q5fAccessories
what what size would i need? i have a 3 inch pipe. (76m i think) so the 80mm and trim down?
http://cgi.ebay.com/ebaymotors/Apexi...Q5fAccessories
if so which did you go for and how hard are they to fit?
23 November 2010, 02:30 PM
#18
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just sick of getting a smelly and carboned up hand putting it in and out lol so fancy one of these
the price isnt too bad either on the apexi ones.
23 November 2010, 03:12 PM
#20
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long journey is in fact better on the newage!
my titanium exhaust on the classic was bad, but the sound deadning etc on newage has improved greatly! inside it doesnt bother me and i can have a good conversation etc with no one complaining.
it got measured at sso 2010 at 101 db
it's local journeys where it can be a problem, bouncing off buildings and cars etc.
my titanium exhaust on the classic was bad, but the sound deadning etc on newage has improved greatly! inside it doesnt bother me and i can have a good conversation etc with no one complaining.
it got measured at sso 2010 at 101 db
it's local journeys where it can be a problem, bouncing off buildings and cars etc.
23 November 2010, 03:26 PM
#21
hi can you help me with this exhaust bung issue, ive never heard of them before but my neighbours are complaining when im up at 5 starting the car, its only a standard 01 reg uk300 so not as loud as alot ive heard but its still enough for them to have a moan. Would a bung work for me? What size do i need for the standard prodrive exhaust (it has the ppp) and do you just stick it in the exhaust? Sorry if there stupid questions.
23 November 2010, 03:48 PM
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they are complaining on a standard prodrive exhaust? i dont think you can get a bung for an exhaust that small.. best advice would be to just keep the revs under 2k rpm when your leaving.
23 November 2010, 03:58 PM
#23
thats the prob it is just the car running they are moaning about not when i drive off, i always keep the revs low the problem is they dont like that i start it and let it warm up! Maybe im just been too polite and should think **** em i got a decibel app for my phone and it was only 70 and that was outside next to the car where it echo's the mad woman next door was even stood at her window staring at me when i left for work monday morning!!!!!!!!
23 November 2010, 04:48 PM
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o as for letting it warm up, theres no need to sit in the car.. just set offkeeping revs below 3k rpm until up to operating temp. no need to let it warm up like that or if you still want to warm it up, jsut drive off immediately out of your estate and park up on a main road or open road and let it idle..
but like i said, no need, just drive off and keep the revs low
half the disels thats fly up and down my road have got to be louder than 70db
but like i said, no need, just drive off and keep the revs low
half the disels thats fly up and down my road have got to be louder than 70db
Last edited by eggy790; 23 November 2010 at 04:50 PM.
28 June 2017, 01:15 PM
#28
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hi can you help me with this exhaust bung issue, ive never heard of them before but my neighbours are complaining when im up at 5 starting the car, its only a standard 01 reg uk300 so not as loud as alot ive heard but its still enough for them to have a moan. Would a bung work for me? What size do i need for the standard prodrive exhaust (it has the ppp) and do you just stick it in the exhaust? Sorry if there stupid questions.
You don't happen to live in Bordon do you?
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