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Author: Subject: Throttle body heat insulation material
r1_pete

posted on 18/1/16 at 04:08 PM Reply With Quote
Throttle body heat insulation material

I need to make a heat insulator to go between my plenum and throttle body, for 2 reasons, 1 it'll help prevent heat soak to the IAT, and 2, it'll give me a touch more clearance.

I need something about 10mm thick, can anyone help with what material I need and any UK suppliers.

Cheers.

Pete.

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theduck

posted on 18/1/16 at 05:41 PM Reply With Quote
PTFE would be ideal.
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monkeyarms

posted on 18/1/16 at 06:29 PM Reply With Quote
Nylon or POLYPROPYLENE ect

http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2050601.m570.l1311.R5.TR6.TRC2.A0.H0.X10mm+plastic.TRS0&_nkw=10mm+plastic+sheet&_sacat =0

[Edited on 18/1/16 by monkeyarms]

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se7ensport

posted on 18/1/16 at 07:01 PM Reply With Quote
Try these guys http://www.ferriday.co.uk/thermal-products/

It worked out about 60 for my Duratec inlet manifold

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gremlin1234

posted on 18/1/16 at 10:49 PM Reply With Quote
once upon a time they used asbestos for this, very good for the purpose, but later found to have significant disadvantages.
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coyoteboy

posted on 19/1/16 at 12:06 AM Reply With Quote
Delrin, or maybe glass filled PTFE. Not raw PTFE or similar as it will have poor stiffness at higher temps.





Report your local potholes, it actually works!

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HowardB

posted on 19/1/16 at 08:37 AM Reply With Quote
ptfe has a very high temperature capability, however it has low modulus and creeps very easily, that is why it is good as a thread sealing tape. Subject to the expected temperature, assuming that it is below 120C then Nylon could be used. Acetal/Delrin would work too. Despite working for a company that makes Nylon, I would probably be inclined to use a tufnol type material. A reinforced sheet laminate. This would be more stable and be less likely to degrade over time.

If you want some nylon drop me a PM I may be able to find some.

hth





Howard

Fisher Fury was 2000 Zetec - now a 1600 (it Lives again and goes zoom)

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r1_pete

posted on 19/1/16 at 12:48 PM Reply With Quote
Thanks for all the advice guys, I've done some googling using the keywords in the replies, came across a trend for using wooden spacers on V8 Carbed engines!!

Cotton phenolic sheet comes a close second to wood for thermal insulation, so I've ordered a 5 worth of Whale Tufnol, which seems have the right characteristics reading the specs.

Thanks again.

Pete.

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nick205

posted on 19/1/16 at 03:53 PM Reply With Quote
Thinking back, my 2.0 Pinto was fitted with a Weber 32/36 DGV carb and had an insulation plate between the carb body and inlet manifold. Not sure what it was made of, but I kept it in place as I assumed it was meant to be there. Again working from memory it was brown in colour and appeared to be fibrous in nature.






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wombat258

posted on 20/1/16 at 08:18 AM Reply With Quote
+1 for tufnol. Nylons, delrin and teflon will relax with heat.
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atomic

posted on 22/2/16 at 10:01 AM Reply With Quote
A Phenolic resin sheet eg Tufnol (ideally Glass Fabric Tufnol) is the correct product to use.
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r1_pete

posted on 22/2/16 at 11:30 AM Reply With Quote
Thanks, yes I got an 8mm sheet of Tufnol, and made the spacer.

I've got the engine running now, and the Air temperature doesn't move as the engine warms up, just what I needed.

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