Need to quite the Cooper S down

[jellison]

Or the other half will get me to sell it (it is hers!) Full Cooper S annd roller 1.5 rockers and soon to be twin 1 3/4" Su's! But too load on 3.44 at motorway speeds.

Haveput sound deadening on floor and up to underdash - but alot of it is from under the bonnet.

Any one know of any under bonnet sound deadening material - obvious heat proof.

Have tried off the shelf one from main mini people - would prefer to get material and make it myself though.

[Wildfire]

Have you got solid mounts or anything on? Never really heard of anything else being used other than the foam stuff. It tends to acumulate water and then rust the bulkhead.

[love machine]

Hahahaha! I've stripped mine out as fabric just makes everything rust. It is stupidly loud though. I'm going to surprise my lady by taking her out for a meal in the mini. I can't wait to see the look on her face as she gets handed a pair of earplugs and I most certainly WILL be opening the door for her to watch her climb out over the door-bar

Carpet and underlay are good if you've got no leaks. Get really fat acoustic stuff from a builders supplier. Mine had an original bonnet soundproofer, I pulled it off when I had an engine meltdown and it got drenched in oil! It shut it up a treat. Tuned minis are noisy and that's the limiting factor.

[jellison]

There is noise and then just a pain in the ass - I know vertually all is down to the 3.44 and that ain't changing!

Do roller rocker quieten it down any?

Juts have to cruise a bit slower than in TVR then!

[Truckosaurus]

Set of ear plugs (99p)

[jellison]

Ooh ya she'd would luv me - kick in the balls and car on ebay!

[Cooperman]

I bet most of the noise is from the carbs. Try a really good filter system if you haven't already.
There really is no way to make a Cooper 'S' quiet though. Try one with a 3.9 diff, straight cut gears and drop gears. Yours will be like a limo after that!

[jellison]

Ok trying to get some K&N's but 49 quid +vat EACH - (trying to get though mate that is something BIG in Moss though) - that and roller rockers might help a bit.

[Wildfire]

K&Ns will give you a lot of induction roar, and probably make it louder if you go for an open type filter. Try maybe an element for the standard airbox.

Roller Rockers will quiten down some of the tappety noise, but none of the engine/running noise. You could always try laying the floor with an extra layer of the rubber sticky stuff, before laying the felt like soundproofing under the carpets. Make sure you have the sound proofing under the carpets on the wheel arches. Under bonnet sound proofing is a big help as well. Make sure you have rubber/deflex bushes rather than poly bushes.

Also try camalo under arch guards with soundproofing stuck to the tops of them.

Failing that switch the Diff to a 3.1.

Try running fully solid/poly bushes, with no Soundproofing, and a 3.76 Diff on the motorway from Carlisle to Surrey.

[jellison]

Air box ill not fit - well it might if I mod it - will look that that - think still have it - modify back plat for diferent sized space holes. Has some shiney chrome mess type things on the twin 1 1/4's at present.

[annodomini2]

5 speed box?

[jellison]

Ooh ya - half the cost of the car for one of those!

[GTRMikie]

Wildfire said:

K&Ns will give you a lot of induction roar, and probably make it louder if you go for an open type filter. Try maybe an element for the standard airbox. .

I swapped the K&N cone filter on my tuned 998 van to the standard air box with a K&N filter element. The difference in noise level was amazing, with no loss in performance.

[jellison]

GTRMikie said:

Wildfire said: K&Ns will give you a lot of induction roar, and probably make it louder if you go for an open type filter. Try maybe an element for the standard airbox. . I swapped the K&N cone filter on my tuned 998 van to the standard air box with a K&N filter element. The difference in noise level was amazing, with no loss in performance.

RIGHT I'm on a Mission tonite to find it - hope it can fit as the new manifold will stand off more than 1 1/4" SU one.

Cheers


>> Edited by jellison on Thursday 2nd March 15:30

[jellison]

No chucked it - out a while ago with all those shitter quad light stuff - doubt I would have had room now. MIniSpeed now sent single HS6/44 manifold now - bugger - now and other 4+days for the right one and twice the cash - Think I'll use an ITg or Pipercross big filter like my TR4 and use sound deadening under bonnet - get from a large car at scrapper an alter shape of ot and glue on.

[Wildfire]

I have a standard HS 4 plastic airbox knocking around somewhere if that's any help. I do have a twin HS 2 one but that's staying on my Cooper S for authenticity.

[jellison]

Wildfire said:

I have a standard HS 4 plastic airbox knocking around somewhere if that's any help. I do have a twin HS 2 one but that's staying on my Cooper S for authenticity.

Is that 4 twins? How deep?

[Wildfire]

No sorry, only a standard Single HS4 plastic airbox.

[jellison]

No Probs - will work it all out when run up on rollers can alway run it with tights over the long ram pipes before I have to get shorter ones and itg or pipercross or make and airbox. Chances of fining an old twin su air box on ebay mnimal - can't believe I chucked it but likley to big - but might make something based on the filter that goes in this!

[Wildfire]

Yeah, could be difficult to find one. One of those, big double ITG or Pipercross (like the ones Keith Calver advertises) will still be pretty noisey. They look good though, pretty expensive though £70+