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 Post subject: BBS rejetting
PostPosted: Wed Dec 15, 2004 9:51 am 
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Turbo EFI
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Joined: Sat Nov 29, 2003 5:45 pm
Posts: 1925
Location: Hamilton the STEEL CITY, ON
Car Model*:
Hey guys, been a while hasn't it?

Just looking for some main metering jet sizes to shoot for. Mine's running lean.

Anyone also know where I can get the throttle shaft rebushed around the Toronto area?

Thanks...

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Ive been calling it as i see it for my entire life and that's not about to change. Take it or leave it.


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 Post subject: Re: BBS rejetting
PostPosted: Sun Dec 19, 2004 2:33 pm 
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Turbo EFI
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Joined: Sat Nov 29, 2003 5:45 pm
Posts: 1925
Location: Hamilton the STEEL CITY, ON
Car Model*:
Still fishing, guys.

Doctor Dodge wrote:
The Holley carb is easy to rejet, all you need is the float bowl gasket and a screw driver. (and the correct jet!) Finding the correct jet size for your conbination is always the challenge, for what you have discribed, I would say a #54-55 jet would be about right.

Thr Carter BBS 1 bbl carbs are more of a challenge because these have a floor jet and a step-up rod which are hard to find these days. I usually work with the step-up rod size alone unless the WOT is way rich.

Sometimes you can get the BBS to lean-out just by getting the step-up rod to drop down into the floor jet a little more.
Take the top off the carb. and measure the diameter of the step-up rod and the floor jet hole. Also look at the ID numbers stamped on the side of the floor jet. (write this information down)
Look at the "hook" at the top of the step-up rod and bend it upward, so the rod can drop deeper into the floor jet. You can also bend the mounting tab on the step-up piston downward, to drop the rod. Test drive the car to see if that helps. If still too rich, go on the hunt for the bigger step-up rod or smaller floor jet.
DD


After a couple hours of searching messages I turned up this gem, which I'll share with anyone who missed it. The context here is in relation to a sea level car being brought up to 5-6000 ft and leaning it out to compensate.

As far as I know, my vac advance works fine and I adjusted my BBS to the Techlit sheet supplied with the KEM carb kit I put in it. I never really looked for the floor jet and rod at the time, god knows why. Id still like to know what sizes I should be working with. It's a 1748 Autoline carb. Ive got a bad stumble on acceleration and a lean main circuit. I used to have a 1920 with a #57 jet, and it also ran a bit lean. Id like to freshen that up as well so I can run that while I tweak the BBS. But both carbs have slight wear in the throttle shafts and I have nowhere to take them.

_________________
Ive been calling it as i see it for my entire life and that's not about to change. Take it or leave it.


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