Zenith NDIX on Single Port

milo · Post by **milo** » Mon Apr 28, 2003 4:13 pm

Hello,
I picked up a Zenith NDIX the other day for my 1600 single port.. I was just curious the carb has 140 mains, 24 vents, 55 idles, and 220 airs? I think I don't really know these carbs so I am not 100% sure if I am looking at the air jets right.. Anyway.. I was curious I have two types of manifolds.. The one it looks like it was on (I purchased from the same person that had the carburator but the carb wasnt bolted to it) which has two separated barrels, but I also have a holley bugspray manifold that has no divider between these barrels.. Now, in my old empi books it shows this carb being used with the divided barrel style manifold (I am sure there is a better name but I don't know it). But, I was reading on the internet that you jet the carb differnt depending on the manifold.. Anybody know which jets/manifold I should be using?

I appreciate any help
Thanks
Nathan

hlwimmer · Post by **hlwimmer** » Mon Apr 28, 2003 5:40 pm

nathan: i'll sell you a companion 32ndix (i have a few) and you can use berg DCNF manifolds and have a great dual 2bbl carb setup... which is what i'm heading towards...

jrb129666 · Post by **jrb129666** » Mon Apr 28, 2003 7:31 pm

I planning to use dual Zenith 32NDIX on my new rebuild, and am curious where I can get jets. Would also be interested in chatting with those who have this set up to get your opinion on how they worked for you.

Steve@pelicanparts.com · Mon Apr 28, 2003 9:45 pm

Speed Unlimed 818 841 0502 Ask for Tom Tell him Steve sent you

milo · Post by **milo** » Mon Apr 28, 2003 11:38 pm

hlwimmer, that sounds really good.. But, I don't think they made single port dcnf manifolds.. I would convert it to a dual port.. But its got 140lbs of compression of each cylinder, so I don't see a point in pulling it apart.. But, I am interested in another carb just in case I was to run them in dual form in the future.. Shoot me a email and let me know what your looking to get for one. nathan@localdomain.net...
Steve, Thanks for the info I will give him a ring tommorrow...

Thanks again all
Nathan

ched · Post by **ched** » Tue Apr 29, 2003 6:13 am

I Had one of these Zenith carbs on a SP bug years ago (1970). The set up was from EMPI and the manifold was designed to be two separate (divided) supplys to each side. The concept was to simulate a " ram" effect. This carb worked very well fo me at the time.

jrb129666 · Post by **jrb129666** » Tue Apr 29, 2003 9:24 am

Steve@pelicanparts.com wrote:Speed Unlimed 818 841 0502 Ask for Tom Tell him Steve sent you

Thanks Steve--I will give your contact a calll--BTW I ordered the new book you guys authored on the Porsche 911 engine rebuild. I got the pre printed copy and just received the full color version--WOW. Incredible book, fantastic pictures, a must have!!! Many things applicable to the buillding of a type 1 motor too!

Post by **Marc** » Tue Apr 29, 2003 9:33 am

milo wrote: ...Anybody know which jets/manifold I should be using?

Generally you only want a plenum-type manifold if your primary interest is in top-end power, the independent-runner type tends to be better for most street use. The Holley BugSprays had a small slot milled in the bottom of the throttle body which was the only "plenum" that Holley thought they should have.

bugnut68 · Post by **bugnut68** » Sat May 03, 2003 7:13 pm

Didn't the Zenith 32NDIX used to be a popular off road carb? Back in the '80s it seemed like every racing Baja or buggy had one...

Guest · Post by **Guest** » Sun May 04, 2003 7:55 pm

Yeah, I believe it's still used on a lot of baja's.. I put the ndix I had on my 1600 single port and it's amazing... It performs much like a dual port 1600 with some icts on it.. Idles completly smooth, I havent really driven the car enough to determine the mpg.. But, all in all I am very happy with this carb setup

Nathan

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Zenith NDIX on Single Port

Zenith NDIX on Single Port

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