1 inch carb spacers

[4speedman]

Has anyone tried a 1 inch open spacer on a 881 intake. I have a couple of these laying around and was thinking of trying them but the open part sitting on the divided intake might cause more obstruction to the air flow than the more plemum area would help. This is going on a street rod engine not an original type car.The carbs are 1406 edelbrock's

 

[Fuzz1957]

If you put on, don’t slam your hood shut before checking space between whatever air cleaner you have and hood.

Fuzz

MAGA

 

[38Chevy]

It’s my opinion that the spacers only benefit you when used on open plenum manifolds.

 

[boxerdog]

I think the general rule is 4-hole on single-plane, open on dual-plane?? But the clock (or dyno) doesn't lie.

 

[4speedman]

I think the general rule is 4-hole on single-plane, open on dual-plane?? But the clock (or dyno) doesn't lie.

Have you seen dyno showing gains or no gain with the spacers.

 

[blkblk63ss]

I have one inch on three small blocks. Phenolic. They help with heat and i really think they help with performance, at least it feels like it.More area to swirl before going down is my thinking.

 

[Ishiftem]

I would be beyond shocked if a 1” spacer didn’t pick up power some. I would go with an open.

 

[blkblk63ss]

Mine are open.

 

[Don Jacks]

It's not going to HURT it any.

 

[boxerdog]

Engine Masters did a great dyno test of spacer/intake combos that gives you a few clues as to what might work best on whatever intake you are using. Back in my Chrysler days we had some dyno info on using 4-hole reverse taper on single plane intakes that indicated that they were useful, even beyond their use as insulators.

 

[1964SuperStocker]

Any chance you can give the air/fuel to hang together longer is going to help some. I have 1 inch spacers on the 348 dual quad set up and like mentioned above. No hood is going to fit on my wagon without a hole cut in it.

 

[BSL409]

We picked up 15hp with 1" open spacers on 881 intake on my first stroker engine on the dyno. and I recall Carl was even surprised

 

[4speedman]

We picked up 15hp with 1" open spacers on 881 intake on my first stroker engine on the dyno. and I recall Carl was even surprised

This sounds good i am going to try them. As i said this is a street rod car with plenty of hood clearance so that will not be a problem.

 

[Don Jacks]

The late Joe Sherman built a 437 stroker that ran 2-2inch spacers on a ported Eddie 2-4 bbl intake and on his combo,it made about 20 extra hp.

 

[boxerdog]

Anyone need to borrow a Sawzall?

 

[4speedman]

We picked up 15hp with 1" open spacers on 881 intake on my first stroker engine on the dyno. and I recall Carl was even surprised

At what rpm did the spacers help the power the most.

 

[1964SuperStocker]

Anyone need to borrow a Sawzall?

Sawzall? We use plasma cutters in this day and age.

 

[Skip FIx]

My motor like 4 hole over open 1" on an Eddy dual quad intake.

 

[mark johnson]

Get phenolic spacers while you’re at it combat heat soak!