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miquain57
PostPosted: Tue Oct 23, 2007 4:46 pm 
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Location: SA - Better than Bundy
Hi Guys,

I have a few motors in the shed and I noticed this on the other day with weird thing's sticking out of it.

the only number i could find is 24c7

My guess is it's a pollution head but as I have never seen one I would like confirmation.

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Thanks guys
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sgc
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PostPosted: Tue Oct 23, 2007 5:08 pm 
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Location: Melbourne
Yep, that's a 'smog' head. Those are the air pipes in their original fittings, having been cut off and crimped over.

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The adventures of an owner builder in the Tallarook Ranges

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clubmn
 Post subject: mm1275
PostPosted: Tue Oct 23, 2007 5:09 pm 
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Quote:
My guess is it's a pollution head but as I have never seen one I would like confirmation
. . Yep your right

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miquain57
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PostPosted: Tue Oct 23, 2007 5:15 pm 
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so where do the pipes lead in the head? to the exhaust chamber?
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sgc
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PostPosted: Tue Oct 23, 2007 5:18 pm 
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Yep, to the exhaust ports just after the valves. There was an air pump driven from the fan belt which injected fresh air into the exhaust ports to dilute the exhaust mixture, and lower the %CO emitted from the tail pipe.

Smoke and mirrors for ADRs.

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The adventures of an owner builder in the Tallarook Ranges

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miquain57
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PostPosted: Tue Oct 23, 2007 5:19 pm 
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Location: SA - Better than Bundy
Thats cheating
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sgc
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PostPosted: Tue Oct 23, 2007 5:21 pm 
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Yes, and making things worse it actually worsened fuel economy, since the engine used more fuel to overcome the additional drag imposed by the air pump.

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The adventures of an owner builder in the Tallarook Ranges

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