Adjusting SUs on 1600s is different. I am able to get everything to spec but
the engine just won't idle smoothly at 600 RPMs. It will run smoothly at
about 850 w/o shaking the car.
I readjusted my 2L carbs today and now I have a steady idle at about 800
RPMs and the engine is smooth. Boy, the 2L linkage makes it a snap to adjust
the high RPM area.
Also has a 2" exhaust I had put on the car today and the guys who did it
were great and went the extra mile to do it right. My car runs much stronger
and now sounds like a car as opposed to my 22 YO stock exhaust which snaked
down to about 1.25" pipes and went putt putt. I've got a baby turbo on it
and it's loud but not obnoxious IMHO but I'm sure others would disagree :)
Now let's go scare little ol ladies!!!!!!!!!
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: Thursday, June 07, 2001 9:15 AM
Subject: Re: valve adjustment/ smog plugs x-mac-creator="4D4F5353"
> My car has the Solex Carbs. Let me try to explain how to balance the
carbs.
> Most people would start fiddling with the adjustment between the carbs
> without a thought as to what they were doing. Here is how I do it. Have
> someone sit in the drivers seat, and depress the Accelerator pedal to the
> floor.(Engine Off) or you can manually hold it(First Carb Butterfly,
> closest to gas pedal linkage) open under the hood. While holding the first
> butterfly fully open, adjust the balancing screw located between the carbs
> until the second set of carbs are fully open. If you go too far with the
> balance screw I believe you will begin to close the Butterfly on the first
> Carb. You must get them the same. After you accomplish this and setting
> the Lock nut, you can start your engine and adjust your air screws. I am
> sure this will improve the performance as well as the mileage on SOME of
the
> cars out there.
>
> When I bought my Corvair 140 HP engine, I set it onto a Milk crate and put
> some gas into a coke bottle with a line from there to the fuel pump, and
> fired the engine up. It ran great, or so I thought. I thought it had
power
> to spare as It was revved up. I have a habit of feeling the exhaust for
> heat differences. One side was hot to the Max, and the other side was
stone
> cold. I realized why the PO sold it. I found there was paper lodged in
the
> fuel line from the fuel pump to one side of the carbs. After blowing the
> line with compressed air, the other side then began to function after it
had
> drawn fuel into the carb. The difference was staggering. I thought I had
> unleashed the Tiger from the tank. The Point is: Had I put that engine
into
> the vehicle without finding that problem, I may have thought the way that
> engine ran was normal, and just let it be. 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: Thursday, June 07, 2001 5:05 AM
> Subject: Re: valve adjustment/ smog plugs x-mac-creator="4D4F5353"
>
>
> >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
|