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Old 05-28-2004, 01:45 PM
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Holley or Demon carb(part 2)

I called Demons tech line and asked about whether or not to install a spacer under their "race demon" carb and they suggested a 1 inch 4 hole spacer....I want low end torque.......does anyone have any experience with this?

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Old 05-28-2004, 03:45 PM
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Race Demon?

I thought you were looking for a carb for a mild 350 engine.

Are we on a different engine here?
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Old 05-28-2004, 04:03 PM
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thats what I was thinkin.
Stinky, what RPM do you plan to run your 350 to ?
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Old 05-28-2004, 06:08 PM
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The spacer will give you better fuel atomization and create more low end torque, but I hold the opinion of the rest of the guys...What are you trying to do with the 350?
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Old 05-28-2004, 07:32 PM
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holley or demon

Sorry.......I meant "road demon".......this is the same mildly built 350. I just wanted more low end to pull this thing up out of the hole. I am running a posi with 343's, but it still is a little sluggish off the bottom. Just wanted to know if the spacer is takes away low end and if so why did "Demons" tech guy tell me I needed one?..............jerry
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Old 05-28-2004, 07:39 PM
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Open spacers kill low end power in favor of upper rpm power, 4 hole spacers help low end power due to higher velocity. what port is your vacuum advance connected to, a full time manifold vacuum source or ported? it should be on a manifold source, if it`s on ported the engine will feel like a slug in the low end.
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Old 05-28-2004, 11:26 PM
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I am not using the vacuum advance........I am using breaker less distributor along with a Mallory Hyfire VI electronic ignition......jerry
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Old 05-29-2004, 10:27 AM
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If the vacuum advance is available I would recommend using it.

You are not running a race car and all street driven vehicles can benefiet from a vacuum pot on the distributor.

I made a custom 4 hole spacer for my road demon and while I am still playing with the jetting it has the power down low.

So yes I would recommend a 4 hole spacer for it.
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