Ive been looking at some spacers for my car and reading about them a little bit. I have a single plane intake and they say that a 2" or bigger spacer will work good. Also that 4 hole adds low end and the open adds top end. Anyone using a spacer with a single plane intake? Let me know what ya got and how good it works thanks a lot!

 

You'll probably never notice the difference between the two. Either way, carb spacers are only $25. try both.

 

Just for info's sake, my cousin said that an open spacer tends to slow down the charge, while a 4 hole spacer tends to help velocity (speed it up).

So if you've got fuel puddling in your intake, an open one might help to slow down the mixture. If you're losing low end power and need more velocity, maybe try the 4 hole.
But yea, best bet would be to do back to back runs at the dragstrip using one of each. 2" seems excessive, that'd be like using a super tall intake manifold like a super victor i'd think. maybe 1"?
haha, maybe you can return the one that doesn't work well for ya

 

ya i think the 4 hole would be my best bet. i think im gonna try that. a 2" 4 hole plastic spacer. ill let you guys know how it works after the weekend

 

i run a super victor intake and found that an open 1 inch works best, although i've tried 2" open, one inch 4 hole, a combo of the two....everything was around .1 of each other, so it didn't make "that" big a difference. But the one inch open is nice since I run my PCV valve into the fitting on it, so I'd keep it either way

 

An open spacer will increase plenum volume which will allow better breathing at higher rpm`s
A 4 hole spacer will give the carb a better signal thru the venturies which will increase your low speed drivebility and raise toruqe in that range due to better fuel atomizing and booster signal.

Take a look at HVH spacers, they offer a merged version of an open and a 4 hole...a ported 4 hole if you will, I see a lot of them at the track so they must be doing something right

 

No way to know except to try them. If it was as easy as just slapping this one or that one on there and it will speed you up, then EVERYBODY would be running the same one, or they'd be losing; and since that's not happening in the real world, you can bet it's not true.

Different combos respond differently. The things that affect affect it go far beyond the motor; gears, converter, car weight, etc. The general rules of thumb are only that, general rules of thumb; they won't tell you how your particular car will respond. For all you know, ANY spacer might make the car go slower.

 

What about a dual Plane? Like the EDL RPM air gap? Open, devided, 4-hole?

 

same deal... you just gotta try it and see

 

I didnt know if there were any spacers to stay away from with a dual plane.

I can only use a 1/2" spacer, so I may not see a difference with either. I just need the space for the PCV.

 

For that, you can just drill a hole in the side of your plenum somewhere.

 

I would consider that route if the intake was off. I could do the spacer in about 15 min.