[Roadsters] 1600 tuning issues

[Roy Haslett]

Sadly I am still in tuning hell.  I have set the dwell to 52 degrees.  Checked
all connections that they are clean and tight.   When car ran it was rough but
I set the timing to 16 degrees  at 600 rpm and verified the vacuum advance was
operating correctly and no leaks when revving engine.  But, the car runs like
shit..super rough with the engine shaking like hell.  Now, the car won't even
start??  Could I have some bad new iginition parts?  Could my 6 month old
Diamond coil have failed?  Previous to attempting this tune up the car ran a
little weird with some very slight backfire but it ran great on the highway. 
I don't think its a carb thing.  Valves were checked 3 times.  I don't get it.
Thanks
Roy



________________________________
 From: Tim
<tputland at charter.net>
To: datsun-roadsters: autox.team.net
<datsun-roadsters at autox.team.net> 
Sent: Wednesday, November 28, 2012 1:22 PM
Subject: Re: [Roadsters] 1600 tuning issues
 
I have (as usual) nothing new to
add. But, I will echo what others have said as well as Paul below. And also
add that my running issues got worse and worse on my tired 1600 as the exhaust
leak at the manifold got worse.

Still waiting on my machinist to finish the
head on my stroker. One step forward, two steps back.....sigh

tim


On Wed,
Nov 28, 2012 at 3:16 PM, Paul Kort wrote:

> Even on the race R16s, spinning
up to 8000 rpms, we never had a timing
> chain jump.
> 
>   back to basics,
set the valve clearance, set the ignition timing, then
> work on the carbs.
>
> Paul
> Ohio
> 
> On Wed, Nov 28, 2012 at 3:32 PM, Pete Peters
<ppeters914 at comcast.net> wrote:
> 
>> According to Roy, the head was rebuilt
at 5k; the motor at 20k (was the
>> timing chain/gears replaced at that
time?). Engine was running fine up
>> until
>> a few hundred miles ago, then
slowly deteriorated.
>> 
>> Wouldn't a timing chain jumping be instantly
noticeable? And, while
>> possible, has anyone experienced a 1600 timing chain
jumping? Isn't that
>> more likely in the OHC engines (U20, L-series)?
>> 
>>
My money is on something more simple like floats and/or exhaust/vacuum
>>
leaks.
>> 
>> This has been a fun thread. Eagerly awaiting the resolution!
>>
>> 
>> Pete
> ________________________________________
________________________________________

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