Carb spacer good idea?
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Kickin' It Oldschool
Joined: Jul 2012
Posts: 422
From: Champaign-Urbana, Illinois
Seasoned beater pilot.
Joined: Jan 2007
Posts: 5,468
From: Chicago
Usually only in engines with 400+ horsepower.
Carb spacers will actually make your motor bog if you already have too much plenum volume. I put a 1"spacer on a stock'ish 455 and it lost 1.5 tenths in the quarter mile, and the 60' went from 1.87 to 1.94
Carb spacers will actually make your motor bog if you already have too much plenum volume. I put a 1"spacer on a stock'ish 455 and it lost 1.5 tenths in the quarter mile, and the 60' went from 1.87 to 1.94
Registered User
Joined: Jan 2009
Posts: 1,412
From: maryland
Usually the spacers are for high-end (rpm) horsepower. I don't think the normal street engine would see any benefit and like the previous fellow stated may actually COST you power.
When I was racing small-block Chevrolets I used the spacer and found a coyple extra horses but this was a high-revving engine with a LOT of gear and converter:--NOT on the street.
When I was racing small-block Chevrolets I used the spacer and found a coyple extra horses but this was a high-revving engine with a LOT of gear and converter:--NOT on the street.
Registered User
Joined: Feb 2011
Posts: 339
From: Central Texas
I can't speak to the performance issues, but adding the 1" spacer between the Edelbrock Performer Intake and Edelbrock 1406 4BBL on my 350 solved some fuel boil issues that caused my car to stall out when hot.
Out of Line, Everytime😉
Joined: Dec 2006
Posts: 10,083
From: Melville, Saskatchewan
I have that one. Being a 4 hole, supposed to help bottom end. Maybe using a spacer is killing me at the track. I tried a 4 hole and open 1" spacer, made no difference at the track.
Registered User
Joined: Nov 2008
Posts: 8,477
From: Central Fl
Wow! Bad info here.
Here are the facts;
Adding a spacer has little to do with the rpm range, see my intake test in the big block section. You're effectively adding plenum volume so if the intake and/or carb are too small for the rest of the combo then typically it will benefit from one.
If the carb and intake size are correct normally it won't. But by making the air/fuel take a less severe turn into the runner some benefit may still be realized.
Here are the facts;
Adding a spacer has little to do with the rpm range, see my intake test in the big block section. You're effectively adding plenum volume so if the intake and/or carb are too small for the rest of the combo then typically it will benefit from one.
If the carb and intake size are correct normally it won't. But by making the air/fuel take a less severe turn into the runner some benefit may still be realized.
Last edited by cutlassefi; Aug 25, 2012 at 05:44 PM.
Thread Starter
Kickin' It Oldschool
Joined: Jul 2012
Posts: 422
From: Champaign-Urbana, Illinois
Save your money for the 350 or 455 you're gonna build one day and drop in that thing 
I don't think chicks are into "Hey wanna check out my smallblock?"
...............That song pops in my head "STROKE ME STROKE ME!"
Billy Squire anyone?
Registered User
Joined: May 2009
Posts: 1,452
Did you buy a spacer like this? Or one of the insulating gaskets that E-Brock recommends? There's a difference. (Honest Question, not trying to be a smart-as*).
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71HolidayCutlass
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Jul 26, 2007 09:08 AM
