Early fixed head - sound deadening felt non standard?

ChrisC · Post by **ChrisC** » Wed Mar 26, 2014 12:25 pm

Gentlemen..

I think a previous owner may have modified the interior of my car so before I keep the 'period' modifications I just want to check something with my learned friends. The storage area on my fixed head has the normal wood panels over the spare wheel and fuel tank BUT on top of those wood panels there is 20mm of sound deadening felt. the Hardura panels are clipped to the wood panels using presstuds that are raised up on brackets to make them as high as the top of the felt. Now all the cars I see at shows dont have this - the hardura is fixed straight to the wood panels with zero felt on top. So I am thinking its highly probable that my car is wrong unless 3.8's had this arrangement? I am about to finish off the hardura panels so now is a good time to put it right. I will take a couple of pictures tonight....

Thoughts please gentlemen?

andrewh · Post by **andrewh** » Wed Mar 26, 2014 5:39 pm

Hi Chris. On my 62 FHC there was no such felt and it was totally unmolested. Just rotten!

christopher storey · Post by **christopher storey** » Wed Mar 26, 2014 5:45 pm

I think it is a mod by a previous owner. Possibly a sensible one, since those boards probably re-radiate quite a lot of road noise, but not in my view original

ChrisC · Post by **ChrisC** » Wed Mar 26, 2014 6:19 pm

As I suspected :) thank you Gentlemen - I will now find my own way of reducing extraneous sound that is a little..... less obvious.

Post by **Heuer** » Wed Mar 26, 2014 10:42 pm

Certainly not shown in the SPC.

ChrisC · Post by **ChrisC** » Thu Mar 27, 2014 12:27 pm

I'll take a few photos before I remove the 'raised' stud points, just in case someone wants to copy the idea. Question to 3.8 owners.... the hardura in my car was one piece - it folded back over the petrol tank in order for you to remove the spare tyre. How was the 'sparewheel-board' removed from the car? My modified interior had a horrible bare metal finger hook that was hidden by the felt and hardura but if the felt is non standard - then how do you remove the board? My replacement trim is two piece so I need to buy the chrome finger pull... so this is just a question out of interest :)

Series 1 · Post by **Series 1** » Fri Mar 28, 2014 10:09 am

Chris,

Here's what I've got, don't know if it's correct as I'm fairly sure it's not original. Hardly high tech but "works" fine. I've never noticed any undue road noise due to lack of insulation but probably will now!

Angus

ChrisC · Post by **ChrisC** » Fri Mar 28, 2014 10:30 am

Thanks Angus that helps more than you know - as I also seem to have extra metalwork installed that I need to remove :) So the spare wheel board simply had a finger hole - I can do that.

Series 1 · Post by **Series 1** » Fri Mar 28, 2014 11:03 am

Glad I could help Chris. "Drill a hole" hardly the most technical advice but that's probably a good thing in my case.

JimmyS · Post by **JimmyS** » Fri Mar 28, 2014 12:09 pm

Chris, hold your horses! My car was built shortly after yours and it has the raised fasteners too. It has two layers of felt, one glued to the board and another that is currently loose, although it looks like it was glued to the lower layer at one time.

Top View.

Glued on felt with fastener and handle.

Offside rear corner.

Underneath.

Both felt layers in place.

Offside front corner.

Don't do anything rash. There can't be too many specials like ours out there!

ChrisC · Post by **ChrisC** » Fri Mar 28, 2014 12:35 pm

Now that is interesting - thats exactly like mine right down to the rusty finger hook !!! I will indeed hold back the equines whilst I conduct a little more investigation. Many thanks Jimmy

64etype · Post by **64etype** » Fri Mar 28, 2014 4:20 pm

Chris,

As you know, I've also been seeking the correct arrangement for my '64 (s/n 889474), as except for the cubby lid, I have no boot boards at all. After our last off-line correspondence I did some additional sleuthing and found the original one piece, flip-over hardura mat. There is no doubt that it is the original. Then I looked for the three drilled holes for snaps in the center sheet metal section of the "hump" (as shown in Angus' photos) . I found one extra hole on the left side of that panel, but it was clearly in the wrong location for a snap. No extra holes on the right.... There are holes drilled in the metal for the cubby board hinges.

Given the absence of the holes for snaps, I'm beginning to wonder if there might indeed have been a center board, and that the two original rear boards were of the configuration shown in the photos provided by JimmyS (and for your car). If there was a center board, there had to be a way to eliminate the step that would have occurred where the rear boards meet the center board. I'm curious if the raised brackets for the snaps are of different height front to rear inan effort to level the luggage floor...as was done for the later ('65 and onward??) cars, albeit with the raised brackets placed on the forward perimeter ledge instead of on the boards...

mouton · Post by **mouton** » Sat Apr 05, 2014 3:34 pm

Eric,

Not sure where those "snap-raising" seats came from, but I have never seen them on a '64, they are not shown in the parts book, and my car sure did not come with them. No felt anywhere back there, no third plywood panel over the IRS either. Mine is exactly as Angus demonstrated above. Now, the noise that you can get from back there might induce some creative work to quiet it; I put felt under the wooden boards out of sight, and experimented with felt above the IRS. But it's not as delivered. "Special", for sure! The noise from the spare wheel well is caused by exhaust resonance on the floorboard; this makes a great speaker diaphragm! But careful installation of the exhaust so that the rear hanger does not hold stress but only acts as a damper or security strap does get rid of most of it. The specific tune of the engine also varies the amount of noise carried in. I took off the felt on the board, got a new one-piece Hardura mat, and all is well. Noise from the differential -- the whine -- is fixed by a rebuild, I guess, or you can experiment with felt back there. But only if you don't care about micro-originality! Best for me turned out to be as delivered. I just completed a 2900 mile tour from California to Austin, Texas -- the West Texas Oil Leak -- and I found that with luggage back there all noise was quieted. Maybe just carry a duffel bag filled with pillows?

The JCNA Judges' guide is a great resource for questions like this:

http://www.jcna.com/library/tech/e-type1.pdf

Details of our tour are compiled here by David Langley:

http://wtxol.blogspot.com/

Did you say you are in Texas? My car is in Austin for the next month or so and you are welcome to come look at my arrangement and take a pattern for your boards if you like.

Jerry

64etype · Post by **64etype** » Sun Apr 06, 2014 12:37 am

Thanks for the additional input, Jerry. No center board it is, then. And thanks for the offer to use your car for making patterns. I've already covered the IRS hump with Dynamat. Don't forget the vertical panel at the forward end of the boot as it shows a significant resonance in a tap test. I'm using the very heavy 1/2" Dynapad on the boot floor (between the reinforcing rails) and will use 1/8" Dynaliner to isolate the perimeter ledge from the two plywood boards. Dynaliner (1/4") looks to be a good choice for the bottom side of the boards if it comes to that.

Not sure the JCNA guide speaks to boot board configuration.

Thanks again.

ChrisC · Post by **ChrisC** » Sun Apr 06, 2014 8:49 am

What is interesting though is that Erics car is USA spec and mine is the UK but both have the same arrangement. It probably is not factory standard and as people say the spares book doesn't show any of this but SOMEONE was doing it consistently as they both look the same right down to the finger hook. Maybe it was only tried for a month or two... my car is a genuine mix of 3.8 and 4.2 anyway. Right or wrong, I think it will keep it on my car till i find out some more.

JimmyS · Post by **JimmyS** » Sun Apr 06, 2014 3:53 pm

Surely the venerable Eric Suffolk or Mick Turley could settle this?

Post by **Heuer** » Sun Apr 06, 2014 5:19 pm

That was going to be my suggestion as well - it would be interesting to find out.

ChrisC · Post by **ChrisC** » Wed Apr 09, 2014 11:33 am

Okay... well I have an answer...

I just had a nice chat with Mike Turley (who very impressively remembered me and the trim kit he made for my car). He was saying that because my car is so early after the transition from 3.8s it has a number of 3.8 fixtures (which is true) and that Jaguar at that time were trying all sorts of things that never continued it into full production to become 'standard'. He recognised my description of the raised up pressed studs and the sound deadening felt and advised that this was almost certainly another case of a short lived solution that Jaguar discarded. So I should consider it standard for 'my car'.

So that's it. If Mike says it was almost certainly an original fitment to my car then I will keep it that way for posterity. Its also nice to know that something else is a little special about my car :)

Post by **Heuer** » Wed Apr 09, 2014 11:40 am

Great info Chris!

JimmyS · Post by **JimmyS** » Wed Apr 09, 2014 5:31 pm

Great stuff, thanks for sorting that out Chris. I'll be keeping mine 'standard' for the car too then.

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Early fixed head - sound deadening felt non standard?

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