Question on Speed Demon

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Jul 18, 2004 | 05:47 PM

GTR1999

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From: Connecticut, USA

Question on Speed Demon

Gary

Last edited by GTR1999; Jun 19, 2024 at 02:16 PM.

Jul 18, 2004 | 05:56 PM

killervette666

Drifting

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From: chicago IL

i dont run PVC but for my power brakes i do use the hole in the back, you can always T it without any problems (i think), as for all the other vacuum lines i used a few Ts to make it all work, seems to be working so far for me.

Jul 18, 2004 | 06:22 PM

1979toy

Melting Slicks

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From: Wichita, KS

I would run the power brakes off of a dedicated connection that is not shared.
I run my light vacuum off of the back of the carb. and the transmission vacuum from a tap in the intake manifold.

Jul 18, 2004 | 09:46 PM

JoeRags

Melting Slicks

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From: Meriden CT

I too run the brakes off a dedicated line tapped in the intake manifold

Jul 19, 2004 | 09:34 AM

Older Than Dirt

Burning Brakes

Joined: Aug 2002

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From: Scottsboro Alabama

gtr1999, I suspect the heat shield is blocking the hole in the manifold where a vacuum fitting could be installed. You could always try the large port with a tee and see how it works. If you are using the timed port for vacuum advance that would leave you with the small direct manifold vacuum port to use also. It also appears that the heat shield is flat (not bent) to clear the accelerator pump arms. The arms will bottom out against the heat shield?

Jul 19, 2004 | 10:40 AM

Older Than Dirt

Burning Brakes

Joined: Aug 2002

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From: Scottsboro Alabama

Quote:

Originally Posted by gtr1999

The bowl is over the hole for sure,I could always mill a hole in the plate but there's not room under the bowl where a fitting would make it. The plate is flat, I was going to offset bend it but decided to slot the area under the arms so this keeps the shield a little higher.

Ok, I can see better now. I suspected you were aware of that, it just didn't occur to me you had slotted the shield. BTW, it looks good, good job!

Jul 19, 2004 | 06:34 PM

Older Than Dirt

Burning Brakes

Joined: Aug 2002

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From: Scottsboro Alabama

Gary, CC shows a part #303319 intake fitting that looks to be a elbow type low profile one port fitting. I don't know if it will work in your case but you might want to look at it.

Jul 19, 2004 | 07:53 PM

ferndog4

Instructor

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From: ca

I have the same Holley heat shield but it appears we have two different types of installation directions. My speed shop installed it the other way round. They installed in the order of manifold base to Carb: basic carb gasket, the Alumin. heat sheild, and then the thicker gasket. No need to cut anything this way. My vacume lines run fine from each of the ports. I am puzzled?

mani. base->carb gasket->Alum. heatshield->thick black gasket->carb