You can buy phenolic spacers at the local hot rod shop for around $20. Open or 4 hole, 1/2", 1", or 2".
I know the fun is making something for yourself, but why spend $40 making something you can buy for $20.
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| Making a carb spacer... https://www.slantsix.org/forum/viewtopic.php?t=29728 |
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| Author: | pinkiedog64 [ Wed Jun 25, 2008 5:32 pm ] |
| Post subject: | Making a carb spacer... |
I have drawn up a carb spacer in Solidworks and have a few questions before I mill it out. I have it dimensioned at .5" thick right now-is this about right? I've heard of them being as thick as an inch. Is there any advantage to this? What thickness do you guys recommend? It's an Eddy 500 on an Offy 4 bbl. Also, the intake is divided into four holes (on the carb mating surface), not open like on the Cliffords. Should I make the spacer with four holes as well, or would it be better (time and effort not in consideration because I have lots of both available) to make the spacer with one big open hole and mill the holes out of the Offy intake so it looks like a Clifford. Any thoughts? One more thing, how are you guys who have to run a 90 deg linkage for throttle doing it? Where did you put the bellcrank? I saw a picture of one a few weeks ago on here but don't remember where it was? If the one who posted it would chime in, I'd appreciate it. |
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| Author: | pinkiedog64 [ Wed Jun 25, 2008 5:48 pm ] |
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Also, where can I find a throttle cable (push/pull) that will be suitable for this set up? |
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| Author: | kesteb [ Thu Jun 26, 2008 3:40 pm ] |
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I would make the holes. If you don't have the holes in the adapter, you should remove them from the manifold. But this is one of those "religious" things. One pundit will say one thing and another something differant. A throttle cable could be used from a later Dodge trunk. |
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| Author: | LUCKY13 [ Thu Jun 26, 2008 4:48 pm ] |
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I would make the spacer as tall as you can fit under the hood. Plenium space is limited in the /6 intakes and the more you add the better it will like it. Have you looked at the spacer they call Anty Reversion & then also Shear plates ? Do a google search and read about them, it will be worth your time. I could give you a link to a good thread about them but you would have to join the forum to still read it. I will link it anyway, you may be a member or could join. http://speedtalk.com/forum/viewtopic.php?t=10803 Jess |
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| Author: | pinkiedog64 [ Thu Jun 26, 2008 6:45 pm ] |
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That could end up pretty dang tall-I have a ton of room before I hit the hood ('64 D100). Maybe I'll go 1" |
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| Author: | LUCKY13 [ Thu Jun 26, 2008 11:42 pm ] |
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lol, I would atleast 2" Jess |
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| Author: | emsvitil [ Fri Jun 27, 2008 12:08 am ] |
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What are you making the spacer out of? |
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| Author: | Wesola78 [ Fri Jun 27, 2008 12:39 am ] |
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"Plenium space is limited in the /6 intakes and the more you add the better it will like it." by Lucky13 So more plenum space is better? For performance and/or driveability? If someone could explain this to me, I would appreciate it. Back to the topic, it sounds like taller is better. I've thought about a spacer on my slant with a subtle hood scoop for "ram air". Just one of the crazy ideas in my head. I've heard of carb spacers being made out of phenolic plastic. I'm guessing that aluminum would work too, but I don't really know. |
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| Author: | emsvitil [ Fri Jun 27, 2008 1:16 am ] |
| Post subject: | |
Aluminum conducts the heat of the intake manifold to the carb.......... NOT GOOD. |
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| Author: | rock [ Fri Jun 27, 2008 5:17 am ] |
| Post subject: | On my '64d100 I made my total height almost 5 inches |
HI pinkie, On my '64d100 I made my spacer with 4 holes and milled in a swirl to match the swirl on a 2 inch riser I bought at a speed shop...It may have been a Mr. Gasket. My total rise is nearly 5 inches. You can cut the intake horn off your Holley, too for more rise....I live where it is warm so I don't have a choke. Like Lucky13 says, some of us believe more plenum is better...more time for atomization, but I am also one of the nuts like Juan and Ted who do modifications inside my Holley like Juan's article shows. I made my adapter so I could mount both the Eddy 500 and the Holley 390 cfm and use em both. If you mount on an Offy intake as I did, you will find it easiest to counter sink the 4 holes to fit the spacer to the manifold and use allen head screws to mount, then use stainless studs to mount the next riser set and mount the carb to the riser. To overcome the heat problem emsvitl notes, I started with a 10 or 12 inch square of head gasket stock and used leather punches to cut mounting holes and carb holes in it. That gasket covers the area under the carb and redirects heat away from the carb. One side of the gasket runs along the valve cover, the other extends outward past the flanges on my dutras. I can put my hands on the carb after running a while and it is cool. I used an 8 inch square of aluminum stock from McMaster Carr catalog. If you drill your holes for intake you will need a serious drill press. The holes are more than an inch in diam (1 5/16?). I ran my press at 75 rpm to avoid tearing the aluminum. rock 64100 |
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| Author: | slantzilla [ Fri Jun 27, 2008 5:58 am ] |
| Post subject: | |
You can buy phenolic spacers at the local hot rod shop for around $20. Open or 4 hole, 1/2", 1", or 2". I know the fun is making something for yourself, but why spend $40 making something you can buy for $20.
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| Author: | pinkiedog64 [ Fri Jun 27, 2008 10:38 am ] |
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I go to a mechanical engineering school and have access to Delrin, aluminum, steel, etc. I also have a Bridgeport vertical mill at my disposal, so if I decide to go with 4 holes, I can fly cut them. Slantzilla, I will have to check out ones at a hot rod shop. No good rod shops here. Have any suggestions as to where I would be able to buy one? Aluminum, plastic, delrin, phenolic, etc: free; set up time: free; mill time: free. I understand your idea, but I have access to free materials and my time is free and during the summer, I have enough of it to justify making one. Plus, how many people really cut out there own carb spacer on a mill by themselves? Cool factor is key here. So, from what I gather, in general, taller is better. Let me ask this: is there any disadvantage to say, going over 2" if I have the room? What do you suggest I make this thing out of? I've even seen wooden ones. |
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| Author: | rock [ Fri Jun 27, 2008 11:42 am ] |
| Post subject: | Pinkie, here is a notion |
Pinkie, I was given a phenolic to use and just didn't like the idea of a plastic part when I do most of my own machining. For me making my parts isn't a cost thing, it is a fun thing! I like doing millng machine and lathe setups and it only took me a few hours to make my spacer start to finish. An addition I would make after making the one I run now is to add fins for more cooling. Look at an aluminum spacer in a JEG's or SUmmit catalog to see what the 2 inch riser looks like. Now imagine starting with a 6 inch square by 2 inch block of aluminum or brass. Mill grooves all round to create thin fins, then fly cut your holes. I polished all my insides with jeweler cloth too. I was strongly tempted to try wood but after making what I run now, and having the carb so cool, I don't think I will use wood. I am gonna do brass or powder coated mild steel next though, for looks. rock '64d100 |
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| Author: | terrylittlejohn [ Fri Jun 27, 2008 5:00 pm ] |
| Post subject: | |
if you have the time, make it, the spacer and skill you end up with will be more than worth it when you do your next project 
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