Universal Triple Carb Heat Shield

[Dr. 240Z]

Hi,

Just thought I'd share what I've assembled for a simple heat shield. In this case it's being used on an L24 with triple Weber DCOE 40's. However, it should work for other carb brands as well.

For those interested in its construction the metal shield was sourced from Z Car Customs- JDM - HOME: and the insulation from Your Racing Safety Company

Cheers,

George

[73str86]

How long ago did you purchase the heat shield? I've been checking on the ZCC website for a while now and the L6 heat shield has always been unavailable.

[ksbeta]

Datsun Spirit carries them as well:

Triple Carburetor Heat Shield | | Datsun Spirit, Inc.

[Dr. 240Z]

Hi,

I purchased it around the first of this year. I was told that a bunch were being fabricated so shipping/delivery took a while. Perhaps, they haven't updated their web site recently - An email to them might yield an answer.

email address: azcarbum@msn.com

Cheers,

George

Edited February 9, 2013 by Dr. 240Z
Spelling

[Travel'n Man]

This may help others find another option - buy direct from Japan.

http://www.classiczcars.com/forums/carburetor-systems-s30/42045-wolf-creek-racing-mikuni-40s.html

[surfer.tech]

I got mine from Kameari USA. Had to come from Japan.

[Dr. 240Z]

Hi,

I just got in touch with Brian (the owner?) of the outfit where I purchased my metal heat shield. He's got one in stock and can have more made up within a week.

Cheers,

George

[Dr. 240Z]

Hi Again,

I forgot to put a plug in for this guy: Shop at home - buy American

Brian, says he will charge $120.00 /unit (includes Shipping within USA) if he gets a bulk order - not sure what a 'bulk' order is but it could be worthwhile asking.

Cheers,

George

[73str86]

I ended up purchasing one from Datsun Spirit Inc. It's aluminum with zinc plated mounting hardware. $116 with shipping.

Triple Carburetor Heat Shield | | Datsun Spirit, Inc.

[Lazeum]

I did my own

It required a galvanized steel sheet, 0.040" thick, a copper tube, 3 long M5 or M6 bolts - I don't remember.

What we are trying to prevent is not heat from convection but energy from radiation. So I've chosen steel instead of aluminum since steel is having a much smaller heat transfer coefficient.

I did a template with cardboard while intake & carbs were off the car.

I've added a extra lip at the end to make the part stiffer; I was afraid about resonance & noise.

Here's a 3D view

In order to make the part, I've used a power shear & a bender. It helps to make a clean job but everybody can do it with garage tools.

From the 3D picture above, you can see I've deviated from the original design for bolt holes against intake.

Then, this is how it looks installed on carbs. They were some free threaded holes on carbs I've used. I've put thread-lock on every bolts.

Additionally, I've added some aluminum tape on shield to dampen vibrations - it is not shown on pictures.

I've driven the car this way, no noise, no vapor lock. The only drawback is I can see now that my carbs are leaking a little after each use.

btw => total cost: 30€ with tons of left over material to run at least 4 extra pieces.

Edited March 14, 2013 by Lazeum

[doradox]

Nice. Stainless steel has an even lower heat transfer coefficient. Copper however has a really big one. About double that of aluminum.

Steve

[Dr. 240Z]

WOW - Outstanding, Lazeum!!

Great post - I envy you for your knowledge of metal properties and skills working with them. Thanks for sharing.

Could be a patent opportunity??

Cheers,

George