[Roadsters] Fan Clutch

[Gary and Cindy Ault]

Domingo,

That seven-blade fan is there for a reason:  NAIS (smog system) equipped 
cars can run hot at idle and low speed, so the fan clutch engages and the 
high-capacity fan work to reduce the temperature.  Unless you live somewhere 
which requires smog equipment on older cars, I'd get rid of the system, plug 
the holes in the manifold and head, and recalibrate the distributor for 
non-smog operation.  Otherwise, I'd leave the seven-blade fan in place.

The connection for the vacuum advance on 1600 carbs is on the underside of 
the front carburetor, just before the carb-to-manifold flange.

Gary

----- Original Message ----- 
From: "Domingo Castilleja" <mingocast at gmail.com>
To: <datsun-roadsters at autox.team.net>
Sent: Tuesday, September 06, 2011 9:43 PM
Subject: [Roadsters] Fan Clutch


>A couple of items that I need assistance with:
> 1. Cannot take off the fan clutch. I am trying to change from a 7 fin fan 
> to
> a 4 fin fan with spacer.
> 2. Cannot find my vacuum advance on my carburetor.
> I working on my 1970 datsun spl311 1600 equipped with smog equipment.
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