It's part of the emissions controls stuff. Here's what was in the Rising Sun
Racing Archives about it:
"On 1600's at the end of the production run there is a solenoid valve mounted on
the intake manifold that is controlled by switches on the clutch pedal and
gearbox. This by-pass valve is activated only when the car is in 3rd or 4th gear
with the clutch engaged (pedal released). The valve allows extra air into the
intake manifold during higher speed running (as in 3rd or 4th gear) to cause a
leaner mixture. The valve is connected to two tubes on the bottom of each
carburetor that draw air from the the throttle bore immediately in upstream of
the throttle valve."
See http://www.gordon-glasgow.org/RSR_Emissions.asp
and this diagram http://www.gordon-glasgow.org/Images/2B-2.gif
for more.
Gordon Glasgow
Renton, WA
> -----Original Message-----
> From: owner-datsun-roadsters@autox.team.net
> [mailto:owner-datsun-roadsters@autox.team.net]On Behalf Of
> Robert.Long@CSDInc.com
> Sent: Thursday, September 20, 2001 8:47 AM
> To: datsun-roadsters@autox.team.net
> Subject: A couple of 70 1600 questions
>
>
> Hello again,
>
> Last night I finally hooked up with another Roadster
> owner here in Albuquerque. I own a 67.5 1600, so I'm
> not to familier with some of the later model stuff on
> his 70 1600.
>
> - It looks like the vacuum line from the distributer to the
> carb has been disconnected. The metal line from the distributer
> is there, but there's no rubber hose going to the carb. On the
> carb side, it's got a rubber plug over the nipple. Can I assume
> that this should be corrected?
>
> - What's that round black sensor-looking piece in between the two SUs, on
> the intake manifold? It looks like it should have a vacuum line
> hooked onto it's nipple also. Where should this line be coming from?
>
> I've been trying to find another local Roadster owner for a couple of
> years. This guy, Mike, found the WyCroc website, and sent an email off
> to Eric?, who forwarded it to me. Looks like I have someone to go cruising
> with.
>
> He bought his Roadster from Mike Young in California. It's got a pretty
> nice
> paint job, that creamy yellow color, real nice stereo, original upholstery,
> which is in nice shape, pretty nice car. I'm going to help him do some
> tune-up
> work next weekend (Plugs, Points, Rotor, Cap, Oil Filter, Unisyn, Colortune)
> and
> inspect his brakes.
>
> I gotta put some more time into our ZIAROC website, so we can hook up with
> more NM owners out there.
>
> Robert - 67.5 1600 - Abq
>
> ///
> /// datsun-roadsters@autox.team.net mailing list
> /// Send admin requests to majordomo@autox.team.net or go to
> /// http://www.team.net/cgi-bin/majorcool
> /// Send list postings to datsun-roadsters@autox.team.net
> ///
///
/// datsun-roadsters@autox.team.net mailing list
///
|
