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Author Topic: Whats a DIS ??......sorry  (Read 1512 times)

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Jim Bob2

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Whats a DIS ??......sorry
« on: 25 January 2007, 21:01:52 »
 :-/
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TheBoy

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Re: Whats a DIS ??......sorry
« Reply #1 on: 25 January 2007, 21:03:55 »
Coil pack.

On V6, there are 3 coils, each fire a pair of cylinders. There are all in one module called a DIS.

This is mounted behind the passenger bank, and is more fiddly that your hbv....
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Markjay

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Re: Whats a DIS ??......sorry
« Reply #2 on: 25 January 2007, 21:07:14 »
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Jim Bob2

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Re: Whats a DIS ??......sorry
« Reply #3 on: 25 January 2007, 21:07:17 »
Quote
Coil pack.

On V6, there are 3 coils, each fire a pair of cylinders. There are all in one module called a DIS.

This is mounted behind the passenger bank, and is more fiddly that your hbv....

When I do the HBV it may pay to fire some wd40 at it then.
Thanks.
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Paul M

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Re: Whats a DIS ??......sorry
« Reply #4 on: 25 January 2007, 21:19:16 »
Distributorless Ignition System or something similar. As it's all solid state you don't need an old-style rotating distributor.
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x25xe

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Re: Whats a DIS ??......sorry
« Reply #5 on: 26 January 2007, 13:15:53 »
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Distributorless Ignition System or something similar. As it's all solid state you don't need an old-style rotating distributor.

Correct.  This system is also commonly termed "Wasted Spark" as both pair of ignition coils fire together.  1 coil fires at the end of the compression stroke (the spark that is required) and at the same time the other coil fires on the exhaust stroke (this is the spark that is wasted as it is firing on the exhaust stroke of the cylinder).

This does, of course, mean that the plugs are firing twice in every cylinder cycle as quickly as opposed to those in conventional system which fire only once, at the end of the compression stroke.
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Paul M

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Re: Whats a DIS ??......sorry
« Reply #6 on: 26 January 2007, 13:35:43 »
Quote
Quote
Distributorless Ignition System or something similar. As it's all solid state you don't need an old-style rotating distributor.

Correct.  This system is also commonly termed "Wasted Spark" as both pair of ignition coils fire together.  1 coil fires at the end of the compression stroke (the spark that is required) and at the same time the other coil fires on the exhaust stroke (this is the spark that is wasted as it is firing on the exhaust stroke of the cylinder).

This does, of course, mean that the plugs are firing twice in every cylinder cycle as quickly as opposed to those in conventional system which fire only once, at the end of the compression stroke.

Or single coil per cylinder arrangements, which of course fire only when required for the necessary cylinder.
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TheBoy

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Re: Whats a DIS ??......sorry
« Reply #7 on: 26 January 2007, 18:29:10 »
Quote
Quote
Quote
Distributorless Ignition System or something similar. As it's all solid state you don't need an old-style rotating distributor.

Correct.  This system is also commonly termed "Wasted Spark" as both pair of ignition coils fire together.  1 coil fires at the end of the compression stroke (the spark that is required) and at the same time the other coil fires on the exhaust stroke (this is the spark that is wasted as it is firing on the exhaust stroke of the cylinder).

This does, of course, mean that the plugs are firing twice in every cylinder cycle as quickly as opposed to those in conventional system which fire only once, at the end of the compression stroke.

Or single coil per cylinder arrangements, which of course fire only when required for the necessary cylinder.
That tends to be labelled as a coil per plug system rather than dis, to differentiate its (alledged) superiority...
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Markjay

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Re: Whats a DIS ??......sorry
« Reply #8 on: 26 January 2007, 21:52:54 »
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That tends to be labelled as a coil per plug system rather than dis, to differentiate its (alledged) superiority...

Nothing ‘alleged’ there… 8-)
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TheBoy

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Re: Whats a DIS ??......sorry
« Reply #9 on: 26 January 2007, 21:54:32 »
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That tends to be labelled as a coil per plug system rather than dis, to differentiate its (alledged) superiority...

Nothing ‘alleged’ there… 8-)
They should be better, but the Vauxhall v6 coil per plug units do seem to be showing a lot of failures. But at least they are eaiser to change ;D
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Markie

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Re: Whats a DIS ??......sorry
« Reply #10 on: 26 January 2007, 22:21:41 »
so now you know what a dis is  :y

But dont be sorry though - its what the forum is for  ;)
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Re: Whats a DIS ??......sorry
« Reply #11 on: 26 January 2007, 22:25:31 »
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so now you know what a dis is  :y

But dont be sorry though - its what the forum is for  ;)

Exactly! - I always knew roughly what it was, know more now!!

I have asked plenty of stupid questions, but thats what these places are for  :y

I suspect there is an area Jim Bob 2, where you know loads about and we know sod all  :y
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Dave-C

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Re: Whats a DIS ??......sorry
« Reply #12 on: 27 January 2007, 07:57:23 »
Direct Ignition System, I'm sure the abbreviations stand for ?  Just a point.. ;)
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