Phenolic insulators for Weber 40's

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williala
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Phenolic insulators for Weber 40's

Post by williala » Fri Jan 31, 2014 6:01 pm

I have a 1976 Porsche 912E, and I am currently overhauling the engine, and converting to dual Weber 40 carbs. My problem is finding the phenolic insulators that go between the carbs and the intake manifold.
I have the 3 stud Porsche heads, and I can't find anyone who provides them. Does anyone have any info on where these could be found?

Thanks.

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Piledriver
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Re: Phenolic insulators for Weber 40's

Post by Piledriver » Fri Jan 31, 2014 6:37 pm

Welcome to the asylum.

Jake Raby sells them, stock or HD urethane bits.

You can also get rubber insulators in the Weber base pattern instead.

IMHO:...
Unless you live in a very hot climate there is no upside to the stock phenolic insulators if using Webers.
They exist to reduce the fuel boiling in the injectors.
I'm running EFI using the factory runners (no insulators) at least and it is not an issue in Dallas for me..
I, for one, regularly embrace our new robot overlords, as I am the guy fixing the robots...

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aircooledtechguy
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Re: Phenolic insulators for Weber 40's

Post by aircooledtechguy » Sat Feb 01, 2014 12:59 am

I've never run those with carbs. A little heat keeps the manifold icing problems away.

udidwht
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Re: Phenolic insulators for Weber 40's

Post by udidwht » Sat Apr 26, 2014 1:02 am

aircooledtechguy wrote:I've never run those with carbs. A little heat keeps the manifold icing problems away.
Shouldn't be an issue with IDF carbs (as far as icing goes). If it were the dreaded Weber progressive then yes icing would be an issue especially in a cool/cold climate zone. I use the phenolic spacers from the VH kit with one exception...I run them between the cylinder heads and intake manifold. No issues with icing.
72 Westy 2056cc
Headflow Masters AMC 42x36mm heads
Porsche swivel foot adjusters
AA Biral 96mm P/C's - CR 7.8:1
71mm stroke
Web 73 cam w/Web solids
Dual 40 mm Webers
Bosch SVDA w/Petronix Ignitor & Flamethrower coil
NGK B5ES
S&S 4-1 exhaust

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