Can someone give me a quick class on understanding a spacer and it's functions?
I know that they say for better torque, use a 4 hole spacer and for more RPM, use a open hole spacer but how and when do you know that you need one?
I also know they sell them made out of various materials, like wood, aluminum and composite materials. Is one better then the other one? I was told that wood is a good choice because it does not absorb heat, but then you see all of these plastic or composite material spacers.
How about the carb shields, the one I have uses the composite base under the aluminum shield. Currently I have it hanging on the shelf or should I think about putting it on?
I'd just like a better understanding of them in case Keith says, lets try a spacer, I can at least act like I know what he's talking about.....
Spacer Talk 101
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Spacer Talk 101
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Re: Spacer Talk 101
I'm looking for a magic spacer that increase torque and HP, but will also fit under the hood?
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Re: Spacer Talk 101
From my reading, I don't think any of us on this forum will use a 4-hole. If I understand correctly, they increase low-end torque. For us we are up and out of that before we leave the line.
So, open spacers. I scavenged a local swap meet and got a few heights to play with. The taller the spacer the more it will increase plenum volume. There is a theory that intakes are made on the small side, or in other words made so they will still work on the smaller engines they fit. This is bad new for us Bruce (as we both own baby big blocks). I haven't tried my spacers yet, but if that theory holds true the spacers I have will do little to help me out...as I already have close to the correct amount of air. Now, if you had a 496, that would use the same intake as on our 396s there could be some real gains.
Also, the further your carb is off the intake the cooler it will remain, which means a denser air/fuel mix.
Anyway, that is what I have concluded from my research.
So, open spacers. I scavenged a local swap meet and got a few heights to play with. The taller the spacer the more it will increase plenum volume. There is a theory that intakes are made on the small side, or in other words made so they will still work on the smaller engines they fit. This is bad new for us Bruce (as we both own baby big blocks). I haven't tried my spacers yet, but if that theory holds true the spacers I have will do little to help me out...as I already have close to the correct amount of air. Now, if you had a 496, that would use the same intake as on our 396s there could be some real gains.
Also, the further your carb is off the intake the cooler it will remain, which means a denser air/fuel mix.
Anyway, that is what I have concluded from my research.
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'71 Nova E85
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Check out my website...
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'71 Nova E85
6.69 @ 100.2 MPH 9/6/14
1.4257 60'
1700' DA
13:1 439 BBC
3330 lbs
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