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carb swap issues --- advice needed badly

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BC4x4life

carb swap issues --- advice needed badly
« on: May 21, 2007, 10:19:43 PM »
I just installed a pony carb on my samurai and it runs OK but it stalls on inclines.  The steeper the angle, the lower the rpm's go until it dies if the angle's too steep.  If I clutch it and turn a corner sharp or slam on the brakes, it will die.  It has more power but if this is the trade off, it isn't worth it.  My stock carb never stalled.  Also do you need to change the jets because sometimes it feels like it is flooding unless I pin it?  Any idea what's up???
« Last Edit: May 22, 2007, 04:54:43 PM by BC4x4life »

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Offline daddyizzle

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Re: carb swap issues --- advice needed badly
« Reply #1 on: May 23, 2007, 07:15:44 AM »
Make sure you have a regulator to meter the fuel flow. I'm no carb expert but I know the stock fuel pump probably puts out too much pressure for that carb. Just a possibility anyways. Someone else here should have the rest of the input you need.

-Adam
« Last Edit: May 27, 2007, 03:14:52 PM by daddyizzle »
If all criminals were behind bars, there would be no one left to patrol the streets.

86 Samurai Tin-Top stock with a Harley 44 sidedraft carb

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eschneider

Re: carb swap issues --- advice needed badly
« Reply #2 on: May 24, 2007, 06:28:03 PM »
OK, relatively new to the forum, so I don't know the lingo.

What's a "pony carb"?

some thoughts:

1) since your problem is with incline, my first instinct is that the new carb uses a side-to-side oriented float pivot/pin.  As you go up a hil, the fuel moves back in the float bowl, the float moves and affects your mixture.  A carb with a front-rear oriented float pin would have this tendency if you elevated one side of the car (driving along the side of a mountain, instead of up it)

2) mixture.  If we're talking weber - the idle circuit is active until about 3000 rpm, after that the main jets kick in.  At idle, to tell if you're running lean - loosely put your hand over the carb throat just for an instant.  If you're lean, the RPM will go up significantly.  If you're rich, it will die almost instantly.  You can adjust the idle mixture with the adjusting screw.  Using a gas analyzer is best, but I'm guessing you don't have one of those in your garage....

Main jets is a little trickier.

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BC4x4life

Re: carb swap issues --- advice needed badly
« Reply #3 on: May 24, 2007, 06:40:26 PM »
That sounds like some good advice but I actually got a mechanic to put it on the scope and give me some tips for $20 cash.  As for the pony carb lingo, it isn't actually lingo.  A pony carb is a very basic manual choke carb off of a Hyundai Pony only available in Canada.