Tuning a single 40MM Kadron?

thrown_hammer · Posted: Thu Dec 29, 2005 3:23 pm Post subject: Tuning a single 40MM Kadron?

I need some info on how to tune the Empi Single Kadron 40MM carb. Everything I have found is for the dual setup. Seems to be just mixture and idle. What is a good starting point for the mixture? The carb came set at 1-1/2 turns out.
For some reason the further in I adjust the mixture screw the better it gets. To the point that is all the way in. Even all the way in the car doesn't run great. It backfires and shoots fireballs out the stinger. (car is a Baja)
I talked to someone that has this carb setup and he just bolted his on and it ran great. I think I may have issues other than the carb. Anyone out there running this carb?
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1974 Superbeetle Bright Orange

Keeper of the Titanium Monkey

John M. · Posted: Thu Dec 29, 2005 4:24 pm Post subject:

I wouldn't be surprised if you had a faulty carb, it's made by EMPI..

I don't have any advice for tuning it as Single Kads are relatively new. It's always hit and miss with EMPI products.

For future reference EMPI is chinese for CRAP.

Good luck.

david greiner · Samba Member Joined: July 18, 2003 Posts: 25

Kadrons often have a problem with flooding over, that would account for you having to lean out the mixture screw. Check the needle and seat and the float level first. Dave

Proformancemotoring.com

Frankenbeetle · Posted: Thu Dec 29, 2005 5:51 pm Post subject:

The tuning guide AJ put up would still apply to a single setup. The fuel pressure being to high, no vac advance, or the fuel squirt adjustment being out were my big problems when I first got into tuning my kads.
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A.J.Sims · Posted: Thu Dec 29, 2005 5:56 pm Post subject:

Check your fuel pressure.
They like lower than 2lbs.

thrown_hammer · Posted: Thu Dec 29, 2005 7:08 pm Post subject:

I have a stock fuel pump so whatever the stock pump puts out is what I have. Is that too much?
I have a 009 dizzy so no vac advance. I called Serranos where I bought the carb and they feel the solar flares are being caused by the accelerator pump coming in late.
Thank you for your advice and good luck wishes... I will look into the fuel pressure, fuel accumulator setting, and the float level.
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1974 Superbeetle Bright Orange

Keeper of the Titanium Monkey

A.J.Sims · Posted: Thu Dec 29, 2005 7:23 pm Post subject:

I have a stock fuel pump so whatever the stock pump puts out is what I have. Is that too much?
Stock pumps can put out up to 7lbs. Kads like 2lbs or less.

I have a 009 dizzy so no vac advance. I called Serranos where I bought the carb and they feel the solar flares are being caused by the accelerator pump coming in late.
what is the timming set at? Total not at idle.

Thank you for your advice and good luck wishes... I will look into the fuel pressure, fuel accumulator setting, and the float level.
Visit the site for more info. This is wy we do all the work to these cabs B-4 you have to!

vdubvr6 · Posted: Fri Dec 30, 2005 7:07 am Post subject:

listen to A.J.! he knows what he's talking about and does awsome work too. i just got my Kads back last week and installed them and they work flawlessly! thanks A.J.
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thrown_hammer · Posted: Fri Dec 30, 2005 7:44 am Post subject:

A.J. I believe it is set at 29 degrees total advance and I think it is around 10 or 11 degrees at idle. I set it awhile ago but followed advice from guys on the Samba for setting timing with the 009. I am going to your site right now to poke around.
So I need a feulpressure regulator? Where can I get one that cranks down to 2lbs?
BTW I checked the accelerator pump and it is set right.
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1974 Superbeetle Bright Orange

Keeper of the Titanium Monkey

Frankenbeetle · Posted: Fri Dec 30, 2005 7:52 am Post subject:

30 to 32 degrees with a 009 is recommended. You might have to play with it though. Hop down to your local auto parts store and pick up a holley pressure regulator. Should be about 25, add on a good pressure gauge, oil filled if you can get it. That's my current setup and it's awesome.
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thrown_hammer · Posted: Fri Dec 30, 2005 9:07 am Post subject:

I picked up a Mr.Gasket pressure regulator but didn't get a gauge. I also got a set of NGK plugs. Shortly I am gonna put the regulator on, set it at 1.5 lbs, and change the plugs. I will have to borrow my friends timing light. I have the kind that has the spring and because of my plug wires I need the kind that clips on the plug wire. Should I just bump it up little by little with the timing or wait for the light?
_________________
1974 Superbeetle Bright Orange

Keeper of the Titanium Monkey

Frankenbeetle · Posted: Fri Dec 30, 2005 9:23 am Post subject:

Take it back!!!!!!

I was using one of those damned things for a month or so and they do NOT regulate the way they claim. The Holley regulator should be the same price, hell, at the Schucks down the street from me the Holley was 10 bucks cheaper than the Mr Gasket piece of crap.

If you get the Holley regulator(1-4 pounds) just screw it all the way out and then back in 5 or 6 full turns, that's roughly 2 pounds to 2.5 pounds.
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Samba Whipping Boy of '07

Mark · Posted: Fri Dec 30, 2005 10:03 am Post subject:

...or if you're a cheap $#%@ like myself Smile

use a vacuum/pressure gauge to determine your fuel pump pressure and shorten your pump pushrod until you're 1.5 to 2 psi. No extra gauge required permanently in the fuel system, (ie. one less point of failure.)
My stock pump was putting out 4.5 lbs before I shortened the pushrod by about 4mm. Just my $0.02 plus tax.

thrown_hammer · Posted: Fri Dec 30, 2005 12:06 pm Post subject:

Too late I already installed it. Figures, this Baja has been a jinx ever since I drove it home. Anyhoo...I checked the compression every cylinder is over 100. i put in the NGK plugs and installed a pressure regulator. If all this doesn't do it what is my next step?
_________________
1974 Superbeetle Bright Orange

Keeper of the Titanium Monkey

thrown_hammer · Posted: Fri Dec 30, 2005 2:51 pm Post subject:

Haven't had a chance to drive it yet but the solar flares have calmed down a little. I can still crank the mixture screw all the way in and it runs. If I try to turn it out like lowbugget.com suggests(to get the highest idle) it starts to stumble and want to die. The fuel pressure regulator is set at 1.5 lbs. I haven't messed with the timing yet.
_________________
1974 Superbeetle Bright Orange

Keeper of the Titanium Monkey

A.J.Sims · Posted: Fri Dec 30, 2005 4:15 pm Post subject:

your fuel pres reg is not working. If the motor will run with the mix screw in than you are geting fuel from over flow.
Set from 30-34* try 34* if it pings drop it 1* and so on.

rbourne3 · Samba Member Joined: May 24, 2005 Posts: 12

RIS · Posted: Fri Dec 30, 2005 5:49 pm Post subject:

Those dial gauages are junk and just add a restriction to your fuel line. A Holley low pressure regulator is much better, but if using a stock pump get a gauge and shim the pump until you get 2psi (As stated above ).
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Mark · Posted: Fri Dec 30, 2005 6:08 pm Post subject:

thrown_hammer · Posted: Mon Jan 02, 2006 8:18 am Post subject:

I am going to put in a vacuum advance dizzy as soon as my friend remembers to bring in the timing light but I may try to advance the 009 first and see if that helps.
For now I am stuck with the regulator I have. I am looking locally for a pressure gauge that will work with ¼” fuel line.
I have put a few miles on the Baja the last couple days. No more solar flares, idles fine. The only issues are the mixture screw anomally and it wants to fall on it’s face right when I take off from a dead stop. If I rev it up it goes just fine. If I try to take off normal it either just dies or goes into wild convulsions and bucks like crazy. If I push the clutch in and give it some gas to get past “the dead zone” it runs fine.
Thanks for all the replies. I am sure with everyone's help I can get this thing dialed in.
_________________
1974 Superbeetle Bright Orange

Keeper of the Titanium Monkey


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