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Zenith 32 NDIX installed. I have some issues...
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xavi_242
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PostPosted: Sat May 16, 2009 5:51 am    Post subject: Zenith 32 NDIX installed. I have some issues... Reply with quote

Hi everyone,

just got this carb, manifold and air filter. Carb is a Zenith 32 NDIX, the guy said that he never installed but it was told it was rebuild... It looks pretty good except for a broken edge in the carb base.

The seller claimed that the manifold is a NOS empi ram air induction from the 70s... I took a look at it and it looks too much new to me for a 30+ year old item...

The air filter is clearly new from china.

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this is the way it should be mounted... but the it would be a mess to change main jets and idle jets and to do the tune up (screws and jets will be in the back, btwn the carb ans the fan shrould)

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this way it would be a lot easier to tuneup and to jet...

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I also got this parts for a very nice price.

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my son checking the parts... ;p

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side view... correct pump lever for a centermount unit??

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the manifold looks like this brouchures...

Ideas on the way it mounts?
Ideas on if the manifold is OG from the 70s?

After this introduction I'll go for the jetting and tuneup questions... Wink
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Last edited by xavi_242 on Mon Aug 03, 2009 12:14 pm; edited 2 times in total
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xavi_242
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PostPosted: Sat May 16, 2009 7:57 am    Post subject: Reply with quote

according to:
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Idle Jet: 60
Main Jet: 130
A/C Jet: 180
Idling air Jet: 140
Venturi: 24

So... what I need to jet this carb? It is going to go in a 1600 SP with a 4 in 1.

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in cm...

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??

thanks
xavi
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xavi_242
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PostPosted: Sat May 23, 2009 12:34 am    Post subject: Reply with quote

please... need help! :p
xavi_242 wrote:

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in cm...

Correct lenght for single application?

xavi_242 wrote:

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??

Now I know this is the choke that should work with a bowden cable. Since many VWs don't have preinstalled a choke cable and I don't want to drive one from front cab to rear of my bus. Do you guys think that it will be difficult to start the engine without the choke??
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Art Thraen
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PostPosted: Sat May 23, 2009 12:29 pm    Post subject: Reply with quote

We are making these choke Block offs to replace missing block offs

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Art Thraen
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PostPosted: Sat May 23, 2009 12:53 pm    Post subject: Reply with quote

This is what a factory Single zenith base looks like

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Art Thraen
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PostPosted: Sun May 24, 2009 7:46 am    Post subject: Reply with quote

The short (Single Acc pump) is 56.5mm Approx

The long (dual) 63mm
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perrib
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PostPosted: Sun May 24, 2009 1:33 pm    Post subject: Reply with quote

The idle mixture screws have to face the firewall.
It is easier to start and drive cold with a choke with the block off plate you will just have to warm the engine up.
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Art Thraen
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PostPosted: Sun May 24, 2009 3:12 pm    Post subject: Reply with quote

Ya,, they are cold blooded... I have tune many of these and MAN they sure do run well...

For a single carb they run as close as the 30 pict 1, as any carb out there... but with 2.5 times the flow (approx)

I have one on the dyno.. It idles so well.. No flat spot revs like a chainsaw and all this 12.8:1 to 13.5: Air fuel.. The idle bounces around 13.5.... NICE..
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volksnut
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PostPosted: Mon May 25, 2009 4:30 am    Post subject: Reply with quote

I've always loved the Zenith, like Art said smooth as silk, hell I even ran one on my turbo Buggy, ran 12.3's in 1/4 mile. The air cleaner is original as looks the intake, I guess it could have been repainted and a new repop sticker installed, but it looks right....
Mine has the same air cleaner as yours
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xavi_242
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PostPosted: Mon May 25, 2009 6:32 am    Post subject: Reply with quote

Thanks guy for answering my questions!

volksnut wrote:
The air cleaner is original as looks the intake, I guess it could have been repainted and a new repop sticker installed, but it looks right....

the seller told me that he bought from a collector and the manifold was in a very worn box...
I want to believe it is NOS never installed/painted Wink
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xavi_242
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PostPosted: Sun Jun 21, 2009 12:11 am    Post subject: Reply with quote

After some issues The carb is finally ready to bolt in my bus. Got new 24 venturis as old ones were re-bored to 27,5mm, new throttle body, new throttle shaft. I also got some jets to jet it properly...

I got all the parts from www.356carburetorrescue.com, nice people.

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My starting setup is:

A/C jets: 220
Main jets: 122 (I can open it to 125, they only had this in stock)
Idle jet: 50
idling air jet: 140
accelerator jets: 50
Emulsion tubes: K4
Vents: 24mm
Acc Pump: 57mm
Nedle valve: 125 (or bigger, I guess)
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Art Thraen
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PostPosted: Mon Jun 22, 2009 7:19 am    Post subject: Reply with quote

Should work good!

Art @ ACE
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PostPosted: Wed Jul 29, 2009 2:52 pm    Post subject: Reply with quote

trying to fit this manifold and carb into my '67 bus...

1. the manifold seems to be a bit narrow (maybe 1,5mm) and don't want to fit into the head cilynders...

2. thecarb sits very high and I don't have space to fit the mushroom type filter... any ideas/mods?

thanks!
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PostPosted: Mon Aug 03, 2009 12:14 pm    Post subject: Reply with quote

OK the carb is in. And running... just some weird issues... :S

Seems that idle screws didn't afect at all, at least the way they should do... When I screw in then rpm increases, If I screw out then decrease, but never dies.

Adjusted float level and still happens... maybe too much fuel pump pressure?

Carb is rebuild, with new gaskets all around and new idle screws, new acc pump valve, new throttle body, etc...

It idles well (with the screws in all the way :S) and runs well, seems that fuel economy in not very good though...

any thoughts?
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Dale M.
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PostPosted: Mon Aug 03, 2009 1:14 pm    Post subject: Reply with quote

Great. thread... Just acquired a Baja with 32NDIX and was wondering about various things..... Main thing is the adjustable link from throttle arm to accelerator pump arm is broken....Is there a inexpensive solution to fixing this.... Do not know yet if car is a keeper so am hesitant to lay out big bucks to get this thing to run...

Seems I bought a $200 barn find with a $1000 carb...

http://www.stoddard.com/shop/shopexd.asp?id=19146

Dale
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PostPosted: Mon Aug 03, 2009 1:35 pm    Post subject: Reply with quote

Dale, I made an arm for a couple of them. I'll try to post it later.. simple hardware will work.
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krusher
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PostPosted: Mon Aug 03, 2009 1:43 pm    Post subject: Reply with quote

xavi_242 wrote:
trying to fit this manifold and carb into my '67 bus...

1. the manifold seems to be a bit narrow (maybe 1,5mm) and don't want to fit into the head cilynders...

thanks!


Are you trying to fit a 40hp manifold to a 1600, the 1200 40hp is not as wide.
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PostPosted: Mon Aug 03, 2009 3:08 pm    Post subject: Reply with quote

Dale,

Ok what you need is some thread stock, some nuts, some retaining clips, some washers, and some thumbscrews to do what I did.. any variation of this could work. To adjust you just unlock the nuts on one end, and adjust length, and lock it back down.

Thubscrews - I got some that were large enough to grind the threads off to make a shaft. If you use brass ones, rust won't be an issue. I had these plated along with the rest of the parts on mine because I used steel.

Drill holes in the thumb screws so that the threaded shaft can go through them. Drill holes in the thumbscrews for the clips to hold it on. You can see what I did from the pic. Small drill bits are necessary to do this.

Hope this gives you some help, or some ideas. Those adjustment rods are sometimes expensive if you can find them. You could make something that is more like the original piece, but this worked fine and is decent looking as well.

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Dale M.
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PostPosted: Mon Aug 03, 2009 8:59 pm    Post subject: Reply with quote

Cool........ Yankee ingenuity at it's best....

Thank You!

Dale
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xavi_242
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PostPosted: Tue Aug 04, 2009 4:34 am    Post subject: Reply with quote

krusher wrote:


Are you trying to fit a 40hp manifold to a 1600, the 1200 40hp is not as wide.

the seller claimed it was for a 1600. I fitted it though...
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