Gearbox Tunnel Foam BD27833

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MSM
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#1 Gearbox Tunnel Foam BD27833

Post by MSM » Fri Jan 10, 2020 6:18 pm

I am replacing the gear lever rubber gaiter on the gearbox cover because it is old and torn. Whilst I was there I removed the gearbox cover to also fit the gearbox tunnel foam. My question is which way round is the foam fitted? Does anyone have any photos of it in place.

The reason I ask is that it is not obvious how it fits. The foam has a roughly central small hole and the rear corners are cut away. The illustration on the SNGB website suggests that it is fitted with the longer dimension along the length of the car but this would mean that the rear end would interfere with the gear lever or the front end would have to be tucked up around the bell housing.

Thus a photo to show one installed would be very helpful.

Link to SNGB picture:

https://www.sngbarratt.com/uk/#!/Englis ... cf86592a6e
Mike

S2 FHC

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Heuer
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#2 Re: Gearbox Tunnel Foam BD27833

Post by Heuer » Sat Jan 11, 2020 11:43 am

Any help?

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David Jones
S1 OTS OSB; S1 FHC ODB

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288gto
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#3 Re: Gearbox Tunnel Foam BD27833

Post by 288gto » Sat Jan 11, 2020 1:03 pm

From Chris Vine's excellent blog...

Image

Rather than pay Barratts £30 for a bit of foam, I got an offcut of epdm foam from a local company for £3.00 and made my own.

Simon
Simon
1969 S2 OTS

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MSM
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#4 Re: Gearbox Tunnel Foam BD27833

Post by MSM » Sat Jan 11, 2020 1:14 pm

Simon - Excellent, thank you. Just what I need. I thought of Chris Vine's blog but couldn't remember his name!!

David - Thank you also.
Mike

S2 FHC

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Mephistopheles
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#5 Re: Gearbox Tunnel Foam BD27833

Post by Mephistopheles » Fri Jan 24, 2020 8:41 am

My question may seem stupid, but what is the function of the gearbox tunnel foam?
Holger
1973 manual LHD OTS E Type
Holger

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Gfhug
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#6 Re: Gearbox Tunnel Foam BD27833

Post by Gfhug » Fri Jan 24, 2020 1:39 pm

Insulation
S2 FHC Light Blue
S2 OTS LHD - RHD full restoration

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rfs1957
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#7 Re: Gearbox Tunnel Foam BD27833

Post by rfs1957 » Fri Jan 24, 2020 2:04 pm

Indeed, silence is, I think, the chief function.

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Image

I made mine to measure from dense closed-cell black foam, and used some dimpled aluminium reflective insulation (left over from the tunnel-wall insulation) to protect it from gearbox heat, reckoning that this would prolong its life.

https://www.designengineering.com/floor ... ii-sample/

I think this sandwich is also a good way of reducing heat coming into the cockpit ?
Rory
3.8 OTS Cream 877393 Built May 28th 1962
1978 Mini Van
(plus bevel and belt single-cylinder Ducatis)

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MarkRado
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#8 Re: Gearbox Tunnel Foam BD27833

Post by MarkRado » Fri Jan 24, 2020 5:21 pm

Definitely to reduce heat ingress - I also stuffed some foam between both tunnel sides and gearbox. Made the cabin noticably cooler when driving in summer heat for several hours on the motorway.
Mark
1963 OTS 880436

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