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Jan 25, 2007 12:32:58 GMT
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I am finding that twin 40's on ramflow air filters are on the noisey side  . I was thinking of building /buying a closed air box that will work with twin carbs. Something like this. www.twminduction.com/Filter/FilterAirBox.htmlAnyone used such a set up? Are there cheap/ DIY alternatives? |
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Jan 25, 2007 12:58:22 GMT
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The old Lotuses used to have an arrangement like that box but on the intake it had a silencer that looked like an exhaust silencer. I've seen the same on Jags. My suspicion is that adding the box itself won't make it much quieter as it will echo and resonate inside. Run it down some ducting to the front with thick pipes and it will aim the noise forwards of the car and it might help.
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Jan 25, 2007 13:11:46 GMT
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Could you not line an airbox with dyna mat?
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Jan 25, 2007 13:35:35 GMT
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Sorry I have no idea. I am now busy watching your avatar.
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Airboxes-tell me moreBenzBoy
@benzboy
Club Retro Rides Member 7
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Jan 25, 2007 13:39:47 GMT
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The old Lotuses used to have an arrangement like that box but on the intake it had a silencer that looked like an exhaust silencer. I've seen the same on Jags. Older Mercs have them too. I soon binned that! ;D Makes a lot of difference to the noise but I found the one on my car quite restrictive. |
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tigran
Club Retro Rides Member
In rust we trust. Amen.
Posts: 6,444
Club RR Member Number: 142
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Airboxes-tell me moretigran
@tigran
Club Retro Rides Member 142
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Jan 25, 2007 13:41:00 GMT
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Sorry I have no idea. I am now busy watching your avatar. Yup that's the rest of the day gone. *gets popcorn* |
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1964 Rover P5 i6
1987 BMW 525e - The Rusty Streak
1992 Micra K10
2001 BMW E46 316i
2002 BMW E46 330Ci
2013 BMW F31 320d
2018 BMW G31 530d
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antdat
Part of things
Posts: 712 
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Jan 25, 2007 14:03:07 GMT
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whats wrong with the sounds of twin 40's  |
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Jan 25, 2007 14:23:03 GMT
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whats wrong with the sounds of twin 40's Nothing, I love the sound, but these just roar (even at idle ;D) and draw too much attention  |
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antdat
Part of things
Posts: 712
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Jan 25, 2007 15:43:35 GMT
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whats wrong with the sounds of twin 40's Nothing, I love the sound, but these just roar (even at idle ;D) and draw too much attention have they got filters on or just trumpets? If i remember right changing the length of the trumpets helps make then louder/quieter then again maybe it was just the tone |
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Jan 25, 2007 16:09:52 GMT
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If you haven't got any type of ram pipe on them then get some. Side draughts run much better with them!
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1962 Datsun Bluebird Estate - 1971 Datsun 510 SSS - 1976 Datsun 710 SSS - 1981 Dodge van - 1985 Nissan Cherry Europe GTi - 1988 Nissan Prairie - 1990 Hyundai Pony Pickup - 1992 Mazda MX5
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Jan 25, 2007 17:08:56 GMT
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If you haven't got any type of ram pipe on them then get some. Side draughts run much better with them! Ed, I'm confused  , what do you mean by ram pipe? Is this some form of tube that channels the air on to the carbs?? BTW, no trumpets, they have Ramflow air filters on them ( Aussie spec K&N equivalent) |
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Last Edit: Jan 25, 2007 17:10:10 GMT by datsfun
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Jan 25, 2007 17:38:02 GMT
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Ed, I'm confused , what do you mean by ram pipe? Is this some form of tube that channels the air on to the carbs?? Exactly that. You can get short ones that fit inside filters if neccesary. They do work a hell of a lot better with them. |
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1962 Datsun Bluebird Estate - 1971 Datsun 510 SSS - 1976 Datsun 710 SSS - 1981 Dodge van - 1985 Nissan Cherry Europe GTi - 1988 Nissan Prairie - 1990 Hyundai Pony Pickup - 1992 Mazda MX5
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Jan 25, 2007 18:00:43 GMT
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ram pipes -   |
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. I was thinking of building /buying a closed air box that will work with twin carbs. Something like this.
[*]
, what do you mean by ram pipe? Is this some form of tube that channels the air on to the carbs?? 
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