Pat,
No, nothing with the balance of the engine as many books I rread on Datsuns
say the engines are well balanced from the factory. It's probably due to the
dual carbs. Dave Pesky owns a single SU 1500 and his car runs well at 600 or
700 rpms.
I had the same problem with my Z too until I put on a single Holley 4
barrel. Although in the Z it did idle much better probably due to the fact
it's a 6 and has a better firing balance or internal movement balance.
Straight 6s are the smoothest of all engines.
Mike
----- Original Message -----
From: "Patrick P. Castronovo" <slick1@mohaveaz.com>
To: "datsunmike" <datsunmike@nyc.rr.com>; <Robert.Long@CSDInc.com>;
<datsun-roadsters@autox.team.net>
Sent: Wednesday, June 06, 2001 10:14 PM
Subject: Re: valve adjustment/ smog plugs x-mac-creator="4D4F5353"
> Would that have anything to do with engine out of balance? Pat
>
>
> -----Original Message-----
> From: datsunmike <datsunmike@nyc.rr.com>
> To: Patrick P. Castronovo <slick1@mohaveaz.com>; Robert.Long@CSDInc.com
> <Robert.Long@CSDInc.com>; datsun-roadsters@autox.team.net
> <datsun-roadsters@autox.team.net>
> Date: Wednesday, June 06, 2001 5:01 PM
> Subject: Re: valve adjustment/ smog plugs x-mac-creator="4D4F5353"
>
>
> >"Valve Clearance Intake & Exhaust .017 Cold"
> >
> >Should say HOT.
> >
> >BTW, can any of you get your car to idle well at 600 RPMs? I can't and
> never
> >could.
> >
> >Mike
> >
> >----- Original Message -----
> >From: "Patrick P. Castronovo" <slick1@mohaveaz.com>
> >To: <Robert.Long@CSDInc.com>; <datsun-roadsters@autox.team.net>
> >Sent: Wednesday, June 06, 2001 3:52 PM
> >Subject: Re: valve adjustment/ smog plugs x-mac-creator="4D4F5353"
> >
> >
> >> Linda:
> >> In my tune up book it reads:
> >>
> >> 1965-1969 SPL311(1600 engine)
> >>
> >> Spark Plugs NGK BP-6E Gap .28 -.32
> >>
> >> Distributor Point Dwell Degree 49-55
> >> Point Gap Inches .018 - .022
> >>
> >> Basic Ignition Timing Degrees 16BTDC @ 600 RPM
> >>
> >>
> >> Compression Pressure (PSI) @ 350 RPM 181 PSI
> >>
> >> Valve Clearance Intake & Exhaust .017 Cold
> >>
> >> Idle Speed 600 RPM
> >>
> >> Firing Order 1 3 4 2
> >>
> >> #1 Cylinder is the front, #2 is next, #3 is next, and #4 is last.
> >>
> >> Distributor turns Counter Clockwise
> >>
> >> As you put your finger over each hole in the firing order, 1 3 4 2.
you
> >> will feel air come out of the Spark Plug hole. That means the valves
are
> >> both closed. Adjust them now, in this position. Rocker arms up off the
> >> Valves. When the valves are open, allowing movement of Air and Gas
> in/out
> >> of the chamber, the rocker, or Cam is pushing down on the valve
> >compressing
> >> the spring. The spring moves the Valve to the Closed Position so it
> forms
> >> an airtight seal in the Cylinder.
> >>
> >> >List,
> >> >A question on the cold valve adjustment- Is it 0.20 or 0.21, and on a
> >> >1600 can you adjust the intake and exhaust of the cylinder the dist
> >> >rotor is pointing to together? Also I am still confused about being
sure
> >> >that valves are fully open or closed-Is that when the pushrods are
fully
> >> >up, the rockers are down and springs are compressed? So at TDC,
> >> >compression stroke, #1, are #1 valves adjusted or not? Someone
mentioned
> >> >the 9 rule, or something like that, is that the only way?
> >> >Second question on plugs. What is the exact size for the intake plugs
> >> >so I know what to ask for. I know about the injector plugs in the head
> >> >already, they have not been done yet.
> >> >Questions form A to Z...
> >> >Linda
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