Dunsfold + sound proofing.
Discussion
Has anyone taken their Ultima to plansmotorsport at Dunsfold for a drive ,and is it a good idea?
Is sound proofing in the cocpit effective with relatively little effort?The alloy panels vibrate at very high frequency[just try touching them with your fingernails!]Is it possible to dampen them?Does carpeting the interior help deaden the sound?I dont mind hard work but only if it is rewarded.Members experiences would help me decide what to do.I have the rear bulkhead carpet.
Frank
Is sound proofing in the cocpit effective with relatively little effort?The alloy panels vibrate at very high frequency[just try touching them with your fingernails!]Is it possible to dampen them?Does carpeting the interior help deaden the sound?I dont mind hard work but only if it is rewarded.Members experiences would help me decide what to do.I have the rear bulkhead carpet.
Frank
I think soundproofing any car is very rewarding. Just take apart a production car sometime and you'll see plenty of sound deadening material, in fact, I would argue, the more expensive and exotic the car, the more effort and expense go into applying sound deadening techniques. The cost of the cars are directly proportional to the sound deadening efforts. I took that same approach with my GTR. I know it adds weight but I'm not an F1 driver so I doubt I notice the difference of 20 to 30 lbs of material. In the US we have a product called Fatmat or Dynamat that is a tar like substance covered with a think aluminum sheet. The tar side is very sticky and almost impossible to remove if it gets a good clean surface to mount on.
Firstly, my car has the double ali skin (highly recommended) and then has an inch of special sound absorbing foam between the two ali panels. I don't know if this is the factory method or not as I am not the original purchaser of my kit. Steve????
Then I applied this Fatmat to almost every surface in the cabin. Under the dash on the fiberglass. Inside the doors (huge improvement in sound reduction and generally making the doors sound more solid when opening and closing), and perhaps the most important is the rear firewall. I used a double skin over the roll bar with that same foam between the ali panels. Then I also applied the Fatmat to the fiberglass on the internal side of the firewall and carpeted over that. There is a small area in the middle of the rear fiberglass firewall that I had to remove the carpeting because it got too thick and wouldn't fit on the chassis properly.
Anyway, I've gone on too long and I can see some of you have already fallen asleep with boredom.
PM me if you have any questions.
Paul
Firstly, my car has the double ali skin (highly recommended) and then has an inch of special sound absorbing foam between the two ali panels. I don't know if this is the factory method or not as I am not the original purchaser of my kit. Steve????
Then I applied this Fatmat to almost every surface in the cabin. Under the dash on the fiberglass. Inside the doors (huge improvement in sound reduction and generally making the doors sound more solid when opening and closing), and perhaps the most important is the rear firewall. I used a double skin over the roll bar with that same foam between the ali panels. Then I also applied the Fatmat to the fiberglass on the internal side of the firewall and carpeted over that. There is a small area in the middle of the rear fiberglass firewall that I had to remove the carpeting because it got too thick and wouldn't fit on the chassis properly.
Anyway, I've gone on too long and I can see some of you have already fallen asleep with boredom.
PM me if you have any questions.
Paul
San Diego GTR said:
I think soundproofing any car is very rewarding. Just take apart a production car sometime and you'll see plenty of sound deadening material, in fact, I would argue, the more expensive and exotic the car, the more effort and expense go into applying sound deadening techniques. The cost of the cars are directly proportional to the sound deadening efforts. I took that same approach with my GTR. I know it adds weight but I'm not an F1 driver so I doubt I notice the difference of 20 to 30 lbs of material. In the US we have a product called Fatmat or Dynamat that is a tar like substance covered with a think aluminum sheet. The tar side is very sticky and almost impossible to remove if it gets a good clean surface to mount on.
Firstly, my car has the double ali skin (highly recommended) and then has an inch of special sound absorbing foam between the two ali panels. I don't know if this is the factory method or not as I am not the original purchaser of my kit. Steve????
Then I applied this Fatmat to almost every surface in the cabin. Under the dash on the fiberglass. Inside the doors (huge improvement in sound reduction and generally making the doors sound more solid when opening and closing), and perhaps the most important is the rear firewall. I used a double skin over the roll bar with that same foam between the ali panels. Then I also applied the Fatmat to the fiberglass on the internal side of the firewall and carpeted over that. There is a small area in the middle of the rear fiberglass firewall that I had to remove the carpeting because it got too thick and wouldn't fit on the chassis properly.
Anyway, I've gone on too long and I can see some of you have already fallen asleep with boredom.
PM me if you have any questions.
Paul
Not boring at all, very interestin....zzzzzzzzzzzzzzzzzz ! Firstly, my car has the double ali skin (highly recommended) and then has an inch of special sound absorbing foam between the two ali panels. I don't know if this is the factory method or not as I am not the original purchaser of my kit. Steve????
Then I applied this Fatmat to almost every surface in the cabin. Under the dash on the fiberglass. Inside the doors (huge improvement in sound reduction and generally making the doors sound more solid when opening and closing), and perhaps the most important is the rear firewall. I used a double skin over the roll bar with that same foam between the ali panels. Then I also applied the Fatmat to the fiberglass on the internal side of the firewall and carpeted over that. There is a small area in the middle of the rear fiberglass firewall that I had to remove the carpeting because it got too thick and wouldn't fit on the chassis properly.
Anyway, I've gone on too long and I can see some of you have already fallen asleep with boredom.
PM me if you have any questions.
Paul
Hi Guys: I ahve posted this before but I will repeat myself. SEM Products www.semproducts.com, builds a product called 39997 extreme rigid urethane. This stuff is used on new Lexus and Infinity products in open cavity's to reduce noise vibration and harshness. It is a two part foam that has a 10 to 1 expansion rate it is very light and once its cured it is a son of a B to remove. Yes I have done that. I used it on the GTR in the double floor panels and the double firewall spaces around the cockpit. I can not say how effective it is because I never drove the car without it. I will say that the rap test, a coin against the panel prior to the foam produced a "live" sound after this stuff was injected the same test produced a very mutted dead sound. If I had the build to do over I would double fire wall the complete panel between the cockpit and the engine bay and fill that entire space with this stuff. The down fall to this product is its exspensive but then so is dynomat which I have on the single layer part of the floor. This products advatage to me is the weight. Side note there are some very serious racers here in So Cal that use this stuff in there unibody circuit race cars and swear that it increases the torsional rigidity of thier cars. Lee
ROWDYRENAULT said:
Hi Guys: I ahve posted this before but I will repeat myself. SEM Products www.semproducts.com, builds a product called 39997 extreme rigid urethane. This stuff is used on new Lexus and Infinity products in open cavity's to reduce noise vibration and harshness. It is a two part foam that has a 10 to 1 expansion rate it is very light and once its cured it is a son of a B to remove. Yes I have done that. I used it on the GTR in the double floor panels and the double firewall spaces around the cockpit. I can not say how effective it is because I never drove the car without it. I will say that the rap test, a coin against the panel prior to the foam produced a "live" sound after this stuff was injected the same test produced a very mutted dead sound. If I had the build to do over I would double fire wall the complete panel between the cockpit and the engine bay and fill that entire space with this stuff. The down fall to this product is its exspensive but then so is dynomat which I have on the single layer part of the floor. This products advatage to me is the weight. Side note there are some very serious racers here in So Cal that use this stuff in there unibody circuit race cars and swear that it increases the torsional rigidity of thier cars. Lee
I used fire rated building foam...This is what I used on the GTR-S and the Can-AM:
http://www.woolies-trim.co.uk/p-1619-foil-coated-a...
It provides a threefold application - sound-deadening, heat insulation and resonance damping.
It's contact adhesive backed, so just cut to fit and stick it on. The adhesive is VERY good.
Job done
http://www.woolies-trim.co.uk/p-1619-foil-coated-a...
It provides a threefold application - sound-deadening, heat insulation and resonance damping.
It's contact adhesive backed, so just cut to fit and stick it on. The adhesive is VERY good.
Job done
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