jayroc

I was thinking of making an aluminum spacer for my nikki to replace the old plastic one and wondered if anyone else was interested as well.

Any takers?

Dick Elliott

Make it out of something better like bakelite to insulate the carb.

Brainmatter

I was thinking the same thing D.E. The plastic is good at insulating the carb. Aluminum is not so good for that. I wonder if Acrylic would work? You can machine it and it is tough as hell. should be inexpensive too.

Jeff20B

iTrader: (13)

Acrylic may change shape in the engine bay.

Rx-7Doctor

iTrader: (13)

Aluminum is what most all aftermarket spacers are made of. Why are you believing that it would not be good?

blwfly

iTrader: (4)

i agree with doc... nothing wrong with aluminum

tho you will need to use gasket when using it as the stock spacer plate has permanet gaskets atached to the plastic.

680RWHP12A

a quote from jegs
"Our CNC machined extreme-poly carb spacers are available in three heights for your tuning requirements. These spacers were designed to lower the transfer of heat from the intake manifold to the carb keeping the fuel at lower temperature for an increase in power. The fine tuning advantages with spacer heights due to track or altitude conditions can give you an edge on your competitors."

heat transfer would be tremendous, causing many problems, oh and the v8 guys that use the poly spacers get the best results


i did a 2" poly spacer for the nikki years ago and it did add some torque.. i wont pass smog though and you cant use it with the rats nest

link to jegs carb spacers
http://www.jegs.com/webapp/wcs/store...cers&x=13&y=10

Glazedham42

iTrader: (4)

The stock spacer has PERMANENT gaskets!!?? Was it a mistake for me to completely remove the gaskets from mine then? I was under the impression that they were removeable. I have 2 new gaskets to put on it. Have I screwed up?

Jozay721

yeah i removed my gaskets and put new ones on and it ran like ****....lol....how would u go about routing vacuum?cuz doesnt the stocl one have vacuum passages?

Glazedham42

iTrader: (4)

Well, at least I'll know what's causing it when it happens. I was sure that you were supposed to scrape those old ones off and replace them. Anyone got a phenolic carb spacer for a broke rotary brother??

Jeezus

iTrader: (4)

Are you talking about the Carb spacer thing with the shield on it?

Glazedham42

iTrader: (4)

Yeah, the big black plastic think that looks like a dinner plate, and the rat's nest plugs into all the little nipples. Apparently you aren't supposed to remove the gaskets on it, and I did.

Jeezus

iTrader: (4)

PMs

Rx-7Doctor

iTrader: (13)

Robert ,
I am slightly confused here. The one statement above states that heat transfer would be tremendous, causing many problems.
Is that is reference to the poly spacers or the Aluminum ones?

Brainmatter

I wasn't saying it would not be good, although there would be more heat transfer to the carb. I just thought why replace my perfectly good stock spacer unless it were with something better. Polycarbonate might work.

Brainmatter

That is in reference to aluminum spacers. They transfer heat quite readily. And no, the gasket is not going to insulate it enough. An aluminum spacer would probably be even more of a problem on a car with a header or missing the exhaust manifold heat shield.

Glazedham42

iTrader: (4)

Robert,

How do you fit one of those JEGS poly/aluminum spacers onto a Nikki carb? Are the bolt patterns a standard size or something? It seems like those spacers would be set up for a more common carb, like a Holley. Do you have trouble fitting the air cleaner under the hood with one?

Brainmatter

I think he was just using that as an example of why aluminum is not the optimum material for this. He stated that he used one years ago, not that he used the ones in jegs.

680RWHP12A

exactly

680RWHP12A

doc try reading the whoe sentance, here it is again

heat transfer would be tremendous, causing many problems, oh and the v8 guys that use the poly spacers get the best results

jayroc

Thanks for the feedback, fellas.
I'll look at some different material and post again if I decide to have them made or not.
I've had some trouble with the stock spacer I was using recently, so I was looking for something better to replace it with..

mustanghammer

iTrader: (3)

In my V8 days if heat was an issue the best spacers to use were plastic (Phenolic) because of the insulating properties. I have also seen Canvas Phonloic and plywood used to make spacers for the same reason.

There was one aluminum spacer that I used that worked really well in a Solo II application. It was a 1" Trans-Dapt swirl torque spacer. It had slots cut in each of the four holes to cause the fuel/air mixture to swirl. It added improved low end performance that could be felt.

The best deal would be to copy this in plastic

Go to: http://www.tdperformance.com/

And click on the Swirl Torque icon for ideas

Re-Speed.com

iTrader: (3)

Garolite G-10, though it is not cheap.




-billy

Glazedham42

iTrader: (4)

Billy,

Can you provide any more info on this material? Where is the best place to purchase it? Do you buy blocks of it and then just machine it down? I'm assuming that this is a thermoset plastic, as you wouldn't want something that's going to be affected by temperature changes. Any tips/experience with Garolite G-10 would be appreciated.

Jamie