Sound Deadening
Discussion
Just wondering if anyone has any experience when trimming the interior of Vixens or Tuscans and using Dyno Mat or that type of product.
I know with steel bodied cars it can be a help in reducing noise however is there any benefit in a fiberglass car.
I am re trimming all the car and thought it might be worth doing.
any pictures of your appreciated.
A
I know with steel bodied cars it can be a help in reducing noise however is there any benefit in a fiberglass car.
I am re trimming all the car and thought it might be worth doing.
any pictures of your appreciated.
A
The more you use, the better it works. The down side is its foul weight penalty. Try to use it in areas where there are large, unbroken planes, such as the door skins, above the differential, sides of the transmission tunnel, and other areas of high noise transmission, such as the bottom of the foot wells, firewall, and even the top of the transmission tunnel.
Starting in the C5, The GM team put balsa wood in the floor of the Corvette. It is flat, cross-cut squares, with a grain orientation perpendicular to the fiberglass panels. Apparently, it did a better job than the other options. How "better" was defined, I have no idea.
Best,
B.
Starting in the C5, The GM team put balsa wood in the floor of the Corvette. It is flat, cross-cut squares, with a grain orientation perpendicular to the fiberglass panels. Apparently, it did a better job than the other options. How "better" was defined, I have no idea.
Best,
B.
We're going to be using some self adhesive closed cell foam sheets on the Taimar for insulation, cheaper than dynomat and does the same job.
This stuff
Was recommended by people on the mini forum, who used bitumen roof flashing to weight the panels and then this foam sheet to insulate. Worked really well apparently, obviously it's more important on a tin can mini and can have a large effect on the noise.
This stuff
Was recommended by people on the mini forum, who used bitumen roof flashing to weight the panels and then this foam sheet to insulate. Worked really well apparently, obviously it's more important on a tin can mini and can have a large effect on the noise.
Thanks for the replies so far i had a look under the carpet in my Vixen and that has had a bitumen based product fitted and i must say she is rattle,creak free so does work well however it does not have a foil finish hence why the car does get hot with the windows closed.
I have spoken with Graham who had the trimmers down from blackpool doing his 3000s trim last week and they have used Fatmat and recommend using that and recon it makes a big difference so i will order up enough to do both the Tuscan and the Taimar as both will be done over the winter.
Cheers
A
I have spoken with Graham who had the trimmers down from blackpool doing his 3000s trim last week and they have used Fatmat and recommend using that and recon it makes a big difference so i will order up enough to do both the Tuscan and the Taimar as both will be done over the winter.
Cheers
A
Sound deadening is a branch of NVH (noise, vibration and harshness) which you can look up on Wikipedia. There are two dimensions to what we are looking at in our cars, sound deadening and sound absorption.
In a steel bodied vehicle the panels will resonate and boom despite careful design to minimise this. Think of a steel band oildrum. A layer of dense rubberised material applied to the surface will damp and minimise these resonances.
Sound absorption is achieved through foam type materials which will absorb sound transmitted through the bodyshell or in the air. The thick fibre boot mats and under carpet padding in production vehicles achieve this. The quilted mat under the bonnet of some TVRs is of this type. Put your head under the bedclothes to hear what I mean.
The resonant frequencies of fibreglass differ from steel so the effect of any course of action will vary from the normal road car results. Trial and error is the only way without recourse to instrumentation. Some guidance may be found from other fibreglass cars such as Lotus or Reliant.
Let us know how you get on.
In a steel bodied vehicle the panels will resonate and boom despite careful design to minimise this. Think of a steel band oildrum. A layer of dense rubberised material applied to the surface will damp and minimise these resonances.
Sound absorption is achieved through foam type materials which will absorb sound transmitted through the bodyshell or in the air. The thick fibre boot mats and under carpet padding in production vehicles achieve this. The quilted mat under the bonnet of some TVRs is of this type. Put your head under the bedclothes to hear what I mean.
The resonant frequencies of fibreglass differ from steel so the effect of any course of action will vary from the normal road car results. Trial and error is the only way without recourse to instrumentation. Some guidance may be found from other fibreglass cars such as Lotus or Reliant.
Let us know how you get on.
TVRdaydah said:
Sound deadening is a branch of NVH (noise, vibration and harshness) which you can look up on Wikipedia. There are two dimensions to what we are looking at in our cars, sound deadening and sound absorption.
In a steel bodied vehicle the panels will resonate and boom despite careful design to minimise this. Think of a steel band oildrum. A layer of dense rubberised material applied to the surface will damp and minimise these resonances.
Sound absorption is achieved through foam type materials which will absorb sound transmitted through the bodyshell or in the air. The thick fibre boot mats and under carpet padding in production vehicles achieve this. The quilted mat under the bonnet of some TVRs is of this type. Put your head under the bedclothes to hear what I mean.
The resonant frequencies of fibreglass differ from steel so the effect of any course of action will vary from the normal road car results. Trial and error is the only way without recourse to instrumentation. Some guidance may be found from other fibreglass cars such as Lotus or Reliant.
Let us know how you get on.
Will do it just was highlighted when i saw what the trimmers have done on Grahams 3000s which i think will be in his blog soon when finished and i think another little project over the water may be sneaking a peep at this thread and getting ideas as well In a steel bodied vehicle the panels will resonate and boom despite careful design to minimise this. Think of a steel band oildrum. A layer of dense rubberised material applied to the surface will damp and minimise these resonances.
Sound absorption is achieved through foam type materials which will absorb sound transmitted through the bodyshell or in the air. The thick fibre boot mats and under carpet padding in production vehicles achieve this. The quilted mat under the bonnet of some TVRs is of this type. Put your head under the bedclothes to hear what I mean.
The resonant frequencies of fibreglass differ from steel so the effect of any course of action will vary from the normal road car results. Trial and error is the only way without recourse to instrumentation. Some guidance may be found from other fibreglass cars such as Lotus or Reliant.
Let us know how you get on.
A
prideaux said:
Thanks for the replies so far i had a look under the carpet in my Vixen and that has had a bitumen based product fitted and i must say she is rattle,creak free so does work well however it does not have a foil finish hence why the car does get hot with the windows closed.
I have spoken with Graham who had the trimmers down from blackpool doing his 3000s trim last week and they have used Fatmat and recommend using that and recon it makes a big difference so i will order up enough to do both the Tuscan and the Taimar as both will be done over the winter.
Cheers
A
I wouldn't have thought a foil finish on something underneath the carpets inside the car would have any effect on whether it gets hot or not.I have spoken with Graham who had the trimmers down from blackpool doing his 3000s trim last week and they have used Fatmat and recommend using that and recon it makes a big difference so i will order up enough to do both the Tuscan and the Taimar as both will be done over the winter.
Cheers
A
Reducing the heat from outside by placing heat shielding on the outside of the tunnel would be more beneficial in my head.
Even then, I think it'd still get hot on a hot day, especially if it's a black interior.
prideaux said:
Will do it just was highlighted when i saw what the trimmers have done on Grahams 3000s which i think will be in his blog soon when finished and i think another little project over the water may be sneaking a peep at this thread and getting ideas as well
A
I think its brilliant what you have seen what Graham,s trimmers have done and I hope it drives as well as it looks. I hope his blog gets better but sad as I am I have always LOVED the noise and vibration from all my TVRs. Blog away!A
Now heat insulation, now that is different. If you only polish your car and sit in a deckchair behind it at shows a few miles from where you live then its not an issue but I thought these were CARS. Driving is brilliant and if you are feeling soft buy an MX5 ( a brilliant car by the way for most people). We have had a few. Horses for Tesco.
Cerberus90 said:
I wouldn't have thought a foil finish on something underneath the carpets inside the car would have any effect on whether it gets hot or not.
Reducing the heat from outside by placing heat shielding on the outside of the tunnel would be more beneficial in my head.
Even then, I think it'd still get hot on a hot day, especially if it's a black interior.
Exactly thats what air cons for Reducing the heat from outside by placing heat shielding on the outside of the tunnel would be more beneficial in my head.
Even then, I think it'd still get hot on a hot day, especially if it's a black interior.
A
Whats the best internal heat insulation. prior to carpeting??
I have used some v expensive merlin motorsport stuff on the transmission tunnel underneath and was going to use something similar but cheaper internally??
I used to use Flashband on my other metal cars which generally looked similar to some of the stuff being sold with an expensive tag on other forums??
N.
I have used some v expensive merlin motorsport stuff on the transmission tunnel underneath and was going to use something similar but cheaper internally??
I used to use Flashband on my other metal cars which generally looked similar to some of the stuff being sold with an expensive tag on other forums??
N.
thegamekeeper said:
I think its brilliant what you have seen what Graham,s trimmers have done and I hope it drives as well as it looks. I hope his blog gets better but sad as I am I have always LOVED the noise and vibration from all my TVRs. Blog away!
Now heat insulation, now that is different. If you only polish your car and sit in a deckchair behind it at shows a few miles from where you live then its not an issue but I thought these were CARS. Driving is brilliant and if you are feeling soft buy an MX5 ( a brilliant car by the way for most people). We have had a few. Horses for Tesco.
Hello SteveNow heat insulation, now that is different. If you only polish your car and sit in a deckchair behind it at shows a few miles from where you live then its not an issue but I thought these were CARS. Driving is brilliant and if you are feeling soft buy an MX5 ( a brilliant car by the way for most people). We have had a few. Horses for Tesco.
Your right driving is what they are for how many miles have you put on your TVRs this year i think i must be up to 6000 miles this year at least and they where all in polished cars sad but true.
lesson to us all drive them and enjoy.
A
prideaux said:
Hello Steve
Your right driving is what they are for how many miles have you put on your TVRs this year i think i must be up to 6000 miles this year at least and they where all in polished cars sad but true.
lesson to us all drive them and enjoy.
A
Your right driving is what they are for how many miles have you put on your TVRs this year i think i must be up to 6000 miles this year at least and they where all in polished cars sad but true.
lesson to us all drive them and enjoy.
A
I dont need to justify or quantify how many miles I have driven in my or any TVR,s this year or any year, polished or otherwise. Only you seem to do. Enjoy.
heightswitch said:
No Please dont that is the sound i could live with all day long its not so much the sound of the beast that i want to deaden its the noise that detracts from it.Nice clip i was only looking at pictures of that car the other day getting ideas for the rear window vents on the tuscan.
A
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