Over the last few days i have finished welding the topside and today the bottom side of my chassis. Tomorrow's work is the two sides and hopefully get the engine and gearbox mounts measured up.
If i were to fix a metal sheet to the inside and outside to the side of my car and the rear of the seating area, and fill the gap with sound proofing material, would this make much difference?
I know the engine would still be fairly loud but what about high speed road noise?

Cheers

ps Before anyone says anything the beef didnt taste nice

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i have finished welding the topside

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Is your car going to have a roof?

Sort of.
I want to design a targa like roof, so the rear will be closed in and i will have 1 or 2 panels that can be removed from above the driver and stored behind the seats.

Too give you an idea my beach buggy has a beetle engine in it (noisy), totally uncovered and with straight through exhausts (very noisy).

I can't even hear it through all the road and wind noise at 70mph...

Jag engines aren't very loud untl about halfway up the rev range. They were designed to be quiet at speed.

My roof idea is based on this.

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Originally posted by speedyxjs
My roof idea is based on this.

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I dont think a jag engine would fit in the back and even if it did, it would handle even worse

I wouldnt bother , it wont make much difference and the sound proofing would most likely get wet and cause the chassis to rot.If you want it quiet i would leave the engine in the Jag.
Paul.

I double skinned my rear bulkhead and stuffed the void with heavy closed cell foam - seemed to work fairly well but then I've got nothing to compare it too.

oh that’s a point, I stripped out the Falcons interior after ten years of mostly roof folded down, numerous times getting caught out in the rain and found the sound proofing was either damp or had been very damp (rust stains on the floor bolts and water marks) so maybe that's not a good idea.

For car audio installs people in the know use Roofing flashing I think it would be called.

Its damned near exactly the same as the Dynamat that all the shops sell but its about 1/2 the price.. it can be a bit messy tho as its bitumen based with a foil type coveing that you just warm up and unroll onto the body pannels.

I have about 5 rolls of camping mat and will seal the floor with laquer + some drain holes.
As i am carpeting mine and its a monocoque I think it will need some sound proofing to stop the panels vibrating.
I am going for the retro Lotus 7/ early Caterham exterior look with full tonneau and wet weather gear. The carpets will be removable incase of wetness from the weather or the passenger