Carburetors Spacers

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Ron_Hall
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Carburetors Spacers

Post by Ron_Hall »

Hi guys.
I have a question about carburetor spacers. I’ll have a Holley 4160 setting on a Edelbrock performer RPM and would like to put a 1” spacer plate under it with vacuum port for brake booster. Would the spacer help/hurt the performance? Also, if I do the spacer, which would be the better option 4 holes or open ?

Engine:
Freshly built 390 – about 9.5 to 1 compression – Edelbrock RPM intake - stock heads with some pocket porting – flat lifters - C6 tranny – stock converter

Thanks for your time..
Ron
1971 F100 SWB 390 FE - bored.030 over
Edelbrock Performer - Holley 600 CFI
Stock heads with some porting - Sanderson FF427 Headers
C6 with stock converter - 3.25 rear end gears
One owner...
M-100
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Re: Carburetors Spacers

Post by M-100 »

Unless you are trying to get more top end power (not usually on a pickup) you don't want to much of a spacer on a performer rpm. But if that is what you are trying to do you won't hurt anything.
Lee
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Re: Carburetors Spacers

Post by Lee »

Hi,

I run a four hole 1" spacer with Vac port just as you describe on my RPM intake.

From my reading, the spacer effectively increases the length on the runners of the intake... this increases throttle response at lower RPM. Can I "feel" a difference? no....

I mainly installed the spacer for the vac port.

Take care,
Lee
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Ron_Hall
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Re: Carburetors Spacers

Post by Ron_Hall »

M-100 wrote:Unless you are trying to get more top end power (not usually on a pickup) you don't want to much of a spacer on a performer rpm. But if that is what you are trying to do you won't hurt anything.
M-100, thanks for the input. mostly for the vac port for the brake booster but don't want any adverse effects from the spacer.

Thanks
Rom
1971 F100 SWB 390 FE - bored.030 over
Edelbrock Performer - Holley 600 CFI
Stock heads with some porting - Sanderson FF427 Headers
C6 with stock converter - 3.25 rear end gears
One owner...
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Ron_Hall
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Re: Carburetors Spacers

Post by Ron_Hall »

Lee wrote:Hi,

I run a four hole 1" spacer with Vac port just as you describe on my RPM intake.

From my reading, the spacer effectively increases the length on the runners of the intake... this increases throttle response at lower RPM. Can I "feel" a difference? no....

I mainly installed the spacer for the vac port.

Take care,
Lee
Thanks Lee, that is pretty much what I was looking for! which spacer did you get?

Ron
1971 F100 SWB 390 FE - bored.030 over
Edelbrock Performer - Holley 600 CFI
Stock heads with some porting - Sanderson FF427 Headers
C6 with stock converter - 3.25 rear end gears
One owner...
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Manny
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Re: Carburetors Spacers

Post by Manny »

On a truck definitely stick to the 4 hole spacer to help with low end performance 4 hole spacers are for torque and throttle response as Lee stated. Open spacers are for plenum volume when you have massive heads. Also i like my phenolic spacers to keep the carb cool but since you need a port i don't think you go with a phenolic. Make sure to run a thick gasket to help keep heat transfer down. :thup:
Just another Ford fool named Dan.
The Junk that hangs around
67' F-250 highboy Camper special cross breed currently under way
http://www.fordification.com/forum/view ... 22&t=86706
1974 Bronco 302 3 speed
1984 bronco 302 c6 35's
1994 F350 7.3 5spd dually.
woods wrote: The rust holes in my truck were a factory install (very rare).
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Ron_Hall
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Re: Carburetors Spacers

Post by Ron_Hall »

Manny wrote:On a truck definitely stick to the 4 hole spacer to help with low end performance 4 hole spacers are for torque and throttle response as Lee stated. Open spacers are for plenum volume when you have massive heads. Also i like my phenolic spacers to keep the carb cool but since you need a port i don't think you go with a phenolic. Make sure to run a thick gasket to help keep heat transfer down. :thup:
Thanks Manny...
1971 F100 SWB 390 FE - bored.030 over
Edelbrock Performer - Holley 600 CFI
Stock heads with some porting - Sanderson FF427 Headers
C6 with stock converter - 3.25 rear end gears
One owner...
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Manny
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Re: Carburetors Spacers

Post by Manny »

Ron_Hall wrote: Thanks Manny...

Sure thing lookie here... Ready to go!
https://www.summitracing.com/ga/parts/s ... /overview/
Just another Ford fool named Dan.
The Junk that hangs around
67' F-250 highboy Camper special cross breed currently under way
http://www.fordification.com/forum/view ... 22&t=86706
1974 Bronco 302 3 speed
1984 bronco 302 c6 35's
1994 F350 7.3 5spd dually.
woods wrote: The rust holes in my truck were a factory install (very rare).
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Ron_Hall
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Re: Carburetors Spacers

Post by Ron_Hall »

How to delete this msg..
Last edited by Ron_Hall on Sat Dec 09, 2017 6:07 pm, edited 2 times in total.
1971 F100 SWB 390 FE - bored.030 over
Edelbrock Performer - Holley 600 CFI
Stock heads with some porting - Sanderson FF427 Headers
C6 with stock converter - 3.25 rear end gears
One owner...
User avatar
Ron_Hall
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Re: Carburetors Spacers

Post by Ron_Hall »

Manny wrote:
Ron_Hall wrote: Thanks Manny...

Sure thing lookie here... Ready to go!
https://www.summitracing.com/ga/parts/s ... /overview/
Thanks Manny...

I found this pic on CJ Pony Parts of the bottom side of the spacer and wondered if you think its ok.
spacer-1.JPG
Also found this one at Summit.
spacer-2.JPG
Thanks again!
Ron
You do not have the required permissions to view the files attached to this post.
1971 F100 SWB 390 FE - bored.030 over
Edelbrock Performer - Holley 600 CFI
Stock heads with some porting - Sanderson FF427 Headers
C6 with stock converter - 3.25 rear end gears
One owner...
User avatar
Manny
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Re: Carburetors Spacers

Post by Manny »

[quote="Ron_Hall
Also found this one at Summit.
spacer-2.JPG

Thanks again!
Ron[/quote]

The cj parts one would work it just has open section to pull from open plenum on the vacuum.

However I like that trans dap one it's phenolic which means it will isolate the heat. To me less heat in the carb from the engine the much more better your gonna be!!! I'd go with that one as it checks all my boxes... :hd:
Just another Ford fool named Dan.
The Junk that hangs around
67' F-250 highboy Camper special cross breed currently under way
http://www.fordification.com/forum/view ... 22&t=86706
1974 Bronco 302 3 speed
1984 bronco 302 c6 35's
1994 F350 7.3 5spd dually.
woods wrote: The rust holes in my truck were a factory install (very rare).
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Ron_Hall
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Re: Carburetors Spacers

Post by Ron_Hall »

Manny wrote:[quote="Ron_Hall
Also found this one at Summit.
spacer-2.JPG

Thanks again!
Ron
""The cj parts one would work it just has open section to pull from open plenum on the vacuum.
However I like that trans dap one it's phenolic which means it will isolate the heat. To me less heat in the carb from the engine the much more better your gonna be!!! I'd go with that one as it checks all my boxes...""


Thanks Manny, I agree and the new spacer is on the manifold as we speak! :thup:
1971 F100 SWB 390 FE - bored.030 over
Edelbrock Performer - Holley 600 CFI
Stock heads with some porting - Sanderson FF427 Headers
C6 with stock converter - 3.25 rear end gears
One owner...
User avatar
Manny
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Re: Carburetors Spacers

Post by Manny »

That's awesome is it running yet? :?
Just another Ford fool named Dan.
The Junk that hangs around
67' F-250 highboy Camper special cross breed currently under way
http://www.fordification.com/forum/view ... 22&t=86706
1974 Bronco 302 3 speed
1984 bronco 302 c6 35's
1994 F350 7.3 5spd dually.
woods wrote: The rust holes in my truck were a factory install (very rare).
User avatar
Ron_Hall
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Re: Carburetors Spacers

Post by Ron_Hall »

Manny wrote:That's awesome is it running yet? :?
Not yet, still have to mount the radiator and hookup all the electrical. plus non-heated garage and 40 degree days slows me down too! :D .

Ron
1971 F100 SWB 390 FE - bored.030 over
Edelbrock Performer - Holley 600 CFI
Stock heads with some porting - Sanderson FF427 Headers
C6 with stock converter - 3.25 rear end gears
One owner...
User avatar
Manny
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Posts: 1190
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Re: Carburetors Spacers

Post by Manny »

Understand completely my wood stove is my buddy. :D
Just another Ford fool named Dan.
The Junk that hangs around
67' F-250 highboy Camper special cross breed currently under way
http://www.fordification.com/forum/view ... 22&t=86706
1974 Bronco 302 3 speed
1984 bronco 302 c6 35's
1994 F350 7.3 5spd dually.
woods wrote: The rust holes in my truck were a factory install (very rare).
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