Contact breaker points gap

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Paul Domoney
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Car(s): Ford Capri mk1 GT 1972

Contact breaker points gap

Post by Paul Domoney »

I have a MK1 Capri.

My workshop manual states the contact breaker gap as .025" which is very large compared to normal cars of say.015"

Is this a mistake? When I set the gap at 0.25" the car does not run as smoothly as when I set it at 0.15"

I would be interested as to what other members set their gap to.

Warm regards from Zimbabwe.

Paul
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Noel
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Re: Contact breaker points gap

Post by Noel »

Gap is supposed to be 0.025 inches, or 0.6mm so about thumbnails thickness.

0.25" is a lot. Have you missed out a zero?
Paul Domoney
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Joined: Sat Sep 08, 2018 10:26 am
Car(s): Ford Capri mk1 GT 1972

Re: Contact breaker points gap

Post by Paul Domoney »

Thanks Noel.

You are quite correct,,025" it is. But I still think that is big as most gaps I work with are,015" and the car does not like the big gap. so I have put it back to ,015"
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Re: Contact breaker points gap

Post by Peter-S »

Isn't the gap different depending on the distributor? The bigger gap is a Ford (Motorcraft) black cap dizzy and Bosch red cap is 16 to 20 thou.
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nemo
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Re: Contact breaker points gap

Post by nemo »

My original 1969 Ford workshop manual states it has a `Ford distributor and spark plugs` which I guess is Motorcraft (no Bosch) and it gives one figure for gap, .025" Same as the Motorcraft in later models. If you change the gap even slightly you will change the timing quite a lot which may make it run better or worse. Ideally get a dwell meter and set the dwell to 45 - 50`, then set the timing with a strobe.
Paul G
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Re: Contact breaker points gap

Post by Paul G »

nemo wrote: Thu Mar 16, 2023 10:44 pm My original 1969 Ford workshop manual states it has a `Ford distributor and spark plugs` which I guess is Motorcraft (no Bosch) and it gives one figure for gap, .025" Same as the Motorcraft in later models. If you change the gap even slightly you will change the timing quite a lot which may make it run better or worse. Ideally get a dwell meter and set the dwell to 45 - 50`, then set the timing with a strobe.
:agree:
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