Carburetor Spacers
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Mountain Pass
Joined: Feb 2020
Posts: 101
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Carburetor Spacers
I feel like I've got a stupid question here but I really don't know. I'm having carb issues and before I go buy another 600 cfm I have a 750 holley which is probably too big for my stock 351 windsor but I just wanna slap it on to make sure it's a carb issue because I know the 750 works good. My truck still has the factory spacer with the egr on the back and the egr is no longer in use but the 750 is longer than my 600 and hits the egr so it wont fit. The spacer is the 4 hole type and I have another regular spacer that's completely open. Can I stack the normal spacer on top of the 4 hole so the carb will be high enough to mount and not hit the egr
Lead Driver
Joined: Apr 2007
Posts: 5,958
Likes: 105
From: Houston
You can stack but I wouldn't go too much if you plan to run it like so as it will effect the cable pull on the throttle if you go too far.
If you go with a spacer I recommend a phenolic plastic spacer, I got a 1" divided phenolic spacer for my summit 600 cfm carb since I wont be running a egr valve this would mimic the 1" egr plate. but now I am running efi but will retain this spacer. The phenolic are great at helping to insulate your carb from heat.
If you go with a spacer I recommend a phenolic plastic spacer, I got a 1" divided phenolic spacer for my summit 600 cfm carb since I wont be running a egr valve this would mimic the 1" egr plate. but now I am running efi but will retain this spacer. The phenolic are great at helping to insulate your carb from heat.
Moderator
Joined: Jan 2001
Posts: 56,984
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From: Virginia
Can you take the egr spacer off and just run the open one? I would pull that EGR spacer off anyway. There is exhaust running around under that spacer, and it sometimes likes to burn the gasket out and cause a big unseen vacuum leak. It has also been known to eat away at the spacer causing the same kind of leak.
And you could also get a 1/8" or 1/4" thick piece of metal, drill holes in it to simulate the egr valve, take the egr valve off and put the plate on there and tighten it down to block the egr ports off and not have the EGR sticking up in the way.
And you could also get a 1/8" or 1/4" thick piece of metal, drill holes in it to simulate the egr valve, take the egr valve off and put the plate on there and tighten it down to block the egr ports off and not have the EGR sticking up in the way.
Thread Starter
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Mountain Pass
Joined: Feb 2020
Posts: 101
Likes: 7
Can you take the egr spacer off and just run the open one? I would pull that EGR spacer off anyway. There is exhaust running around under that spacer, and it sometimes likes to burn the gasket out and cause a big unseen vacuum leak. It has also been known to eat away at the spacer causing the same kind of leak.
And you could also get a 1/8" or 1/4" thick piece of metal, drill holes in it to simulate the egr valve, take the egr valve off and put the plate on there and tighten it down to block the egr ports off and not have the EGR sticking up in the way.
And you could also get a 1/8" or 1/4" thick piece of metal, drill holes in it to simulate the egr valve, take the egr valve off and put the plate on there and tighten it down to block the egr ports off and not have the EGR sticking up in the way.
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