I've gotten some sound deadening done for my Suprima's firewall about a year ago. It reduces the noise above 2000 rpm quite significantly. Below that it's mostly full of noise caused by engine vibration.

I bought and stuffed a whole bunch of 3M Thinsulate around the firewall (cabin side) and i the engine compartment behind the sound deadening done last time. It's more bearable but don't expect a quiet ride like Mazda. It's much better than nothing.

The car's NVH definitely can be improved as long as you find the right shop and/or solution. Focus on engine noise/front floor damping/sound absorbing.


*Sound deadening was done by EA Autoworks. It does not involve any vibration damping material though, so that may explain why the noise around 2000 rpm and below is not really reduced by much. It will probably help a lot if you can apply some vibration damping material on the firewall (outside and inside) and around the foot well as well before placing some medium-high frequency noise absorbing material.

Since your car is made in year 2013, it'll also probably help loads if you get your engine/transmission mountings changed (there are 4 in total incl. engine/transmission).


P/S: if you're interested you can arrange to meet up with me to try my car.. I'm curious to know how effective is the current sound deadening solution of my car.

This post has been edited by TDUEnthusiast: Mar 22 2018, 09:29 PM

Thanks for the input man, really appreciate it. May ask my trusted mechanic to have a look at those items listed. Will try it out first instead.

Hi TDU, thanks for the full info. Really enlightening and appreciate your valuable offer for a personal test ride. Will contact you for sure soon, once I'm done with travelling again next week.

Ayoooo...that's what I'm afraid of in the first place i.e. the results may not turn up to my expectation and need further 'improvements' which increases outlay further.

Will skip this route for time being till last resort.. Thanks ya

Go drive a car that's not so quiet. Then u drive back your suprima. U will appreciate it again. Cheapest psycho solution.

this! just buy a stock car with good NVH. i've tried autofoam and it doesn't reduce NVH, it only helps to stiffen the chassis but not to the point of reducing NVH.

Heard that the next update preve or suprima s will improve NVH. Hmm..

For proton car with campro engine just focus on how to reduce engine noise. Even for myself coming from outstation trip using axia then go back to persona at hometown also felt the same like yours. This we only notice after drive other car after sometime. We will not realize the boomy noise if only drive a proton car.

Axia wei, dat better than persona? Hmmmm maybe only wen you floor the pedal..but sometimes the engine roaring sound feels good right, like rally car :-)

I did not read all responses here but agree with one side, which is not to do anything to the car in terms of soundproofing but rather change to a different car instead. Of course one is free to do whatever he likes up to his preference. My own personal opinion and preference has always remained, that is to have the car in stock condition and not do any modifications as to me it is a waste of money and effort. Unless one is a tinkerer or have extra money to spend on these accessories such as soundproofing, nice sporty rims, better audio (HU and speakers or subwoofer etc.) then that's fine. It all depends on priorities and own preference.

My opinion is if you want a quiet car in terms of NVH, you would also want a quiet car in terms of a rattling-free sound. Older cars usually have more rattling sound than others due to wear and tear parts, and these noises will mar the quietness of the car in the event one has done the soundproofing to improve the NVH. I own the Proton Preve Turbo from 2013 as well and currently there is an intermittent sound from the suspension that comes up sometimes. Some of these rattling noises can be eliminated by replacing the parts but it may be difficult to pin-point where the noise comes from in some cases.

"Hard ride" of the Suprima (presuming the Preve also rides the same) is inherent as the suspension of the Proton Preve/Suprima is tuned to be firm. The firm or hard suspension is useful when one drives on uneven roads or bumps as the car will not "sink down" too much with the firm suspension. In other words, you may drive the car at higher speeds on these uneven or undulating road surfaces and the car will not feel like a rocking boat too much, unlike the softer and more "springy" suspension of almost all other cars which include Japanese and continental which will rock like a boat and with the bottom of the car hitting the higher part of the road surface or bumps at higher speeds. There are pros and cons to both suspension setups. It is more to a personal preference rather as to which is "better". I have no issues with either suspension setups of the Proton Preve Turbo and Ford Focus which I also currently own, and my previous Nissan Sylphy.

In summary, personally my advice to you is to save your RM3k for soundproofing or Autofoam. Others may have a different opinion and that's fine. To me it is a waste of money to spend on these stuff unless you have an interest or passion in this hobby or have some extra money to spend. It's best to spend it elsewhere, such as a new TV or computer etc.

This post has been edited by SportyHandling: Mar 23 2018, 07:37 AM

EA Autoworks also claim to have better engine/transmission mountings for the Preve/Suprima. You should look into that option instead as the original mounts from Proton don't last.

I am wondering...will the foams causes the car body to be too solid and can't even absorb the collision force?

(Because like our car bumpers mostly are soft and bendable)

Do you really think that foam will be harder than steel used for cars?

Snake oil la chassis foaming.

I dont see Lambo, Porsches, Ferrari using this revolutionary product.

if you got the extra cash to splash, dont waste it on foaming, just donate (for karma points!)

For sure i will not tempered something that car manufacturer wouldn't do.

A video from Bobby Ang in KL Auto, showing the foam in a plastic bottle that became solid hard, no room for bending.

And this leads me wondering about the collision force...did someone notice that?

No idea never kiss others and kena kiss b4. Nevertheless the pu foam is a very lightweight foam normally used as gap filler. Infact I diy b4 and it's much cheaper by diy. 1 can cost ~RM50 and for the bottom chasis, estimated to use ~3-4cans. Well my latest car, I prefer to pay for service rather than diy..not easy haha. Total damage RM400.

Effect as correctly elaborated by few forumers here - minimal effect. Probably ~5% improvement. U will feel diff esp going thru those yellow speed reducer lines b4 toll plaza. Also improvement is the overall handling as u corner better without the needs to upgrade to bigger rim, UR bars or even sport suspension.

The best sound proofing effect is on doors, roof & boot. However this carried weight as those bitumen & foams will add atleast 10kg to the car weight.

Well for TS driving a turbo car, really no choice as the engine sound is really crazy. TS probably can try civic turbo to pacify himself as civiv turbo engine also another hell noisy! Haha

Yes, it's true. Axia engine noise when idling and cruising speed better than campro, but not at high rpm.

Yes, campro roar nicer when we rev at high rpm, it sound sporty.

already saw the updated preve..gomen car. but so far didnt see any advert from proton sales agent yet.

Spend 3k on soundproofing? blasphemous! should spend 100k on a new car!!

Some comments just crack me up.

This post has been edited by dares: Mar 23 2018, 12:18 PM

Bobby Ang will say anything people ask him to say.

He cant really offend car manufacturers and industry players. As he wants to continue getting cars for reviews and products to recommend. Bread and butter le..

mahihi

soundproof cheap a bit la may find his thread in garage sales