Setting Crab and timing
Thread Starter
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Elder User
Joined: Jun 2008
Posts: 694
Likes: 8
From: Vashon, WA
Setting Crab and timing
just got the manifolds and carb for my 223 and am going to attempt to start it tomorrow.
What are the approximate settings for the carb?
Also about what should the timing be?
What are the approximate settings for the carb?
Also about what should the timing be?
Cargo Master
Joined: Apr 2007
Posts: 2,063
Likes: 38
From: Valley Center, California
Welcome,
It would help if you could describe what you are doing in a bit more detail. What kind of Carb ? More than one ? Is the 223 stock ? Modifications ?
If it's stock : In general, back the idle mixture screw out about 2 1/2 turns. Get the vehicle started, get it up to temperature and set the idle. Screw the idle mixture in until you notice the the idle begin to slow or falter. Bring it back out until it's smooth. Then, bring it out another 1/4 turn or so.
With the timing, most folks like to ad a few more degrees of advance than the stock setting. You can usually get away with up to 4 more degrees over stock but as with any engine, you need to listen for pre-ignition. Especially if it's hot or you're pulling a hill under load.
All this adjusting can change your idle speed. So when you finalize your timing, be sure it is set while at the specified RPM. It will usually say something like 6 degrees BTDC@700 RPM or something like that.
If you don't know the stock timing setting the folks here can help you but I suggest you get your self a basic book for your particular Truck.
Let us know how it turns out.
It would help if you could describe what you are doing in a bit more detail. What kind of Carb ? More than one ? Is the 223 stock ? Modifications ?
If it's stock : In general, back the idle mixture screw out about 2 1/2 turns. Get the vehicle started, get it up to temperature and set the idle. Screw the idle mixture in until you notice the the idle begin to slow or falter. Bring it back out until it's smooth. Then, bring it out another 1/4 turn or so.
With the timing, most folks like to ad a few more degrees of advance than the stock setting. You can usually get away with up to 4 more degrees over stock but as with any engine, you need to listen for pre-ignition. Especially if it's hot or you're pulling a hill under load.
All this adjusting can change your idle speed. So when you finalize your timing, be sure it is set while at the specified RPM. It will usually say something like 6 degrees BTDC@700 RPM or something like that.
If you don't know the stock timing setting the folks here can help you but I suggest you get your self a basic book for your particular Truck.
Let us know how it turns out.
Thread Starter
|
Elder User
Joined: Jun 2008
Posts: 694
Likes: 8
From: Vashon, WA
stock 223 with stock single barrel and stock intake.
I'm trying to get a repair manual but haven't' ordered it yet.
I'll mess with it tomorrow and see how it goes.
So I don't know the stock timming or what is a safe setting.
I'm trying to get a repair manual but haven't' ordered it yet.
I'll mess with it tomorrow and see how it goes.
So I don't know the stock timming or what is a safe setting.
Cargo Master
Joined: Apr 2007
Posts: 2,063
Likes: 38
From: Valley Center, California
I don't know the year or application but I found some info at this link. Looks like about 3 degrees BTDC at 450/475 RPM is a good place to start.
Classic Car Owners Guide: Ford
Classic Car Owners Guide: Ford
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