I am starting to focus on this problem, unfortuneatly I do not know enough
about it. What am I looking for, Where should it be set, and who can check
this?? Thanks
At 10:54 PM 1/23/99 -0700, Larry Quirk wrote:
>Have you checked the mechanical advance in the distributor to make sure it
>is free and providing the correct amount of advance at the specified rpm. A
>good ignition shop will still have a distributor advance machine to measure
>the advance curve.
>Spitman
>
>-----Original Message-----
>From: cecil wise <cwise@southwind.net>
>To: spitfires@autox.team.net <spitfires@autox.team.net>
>Date: Thursday, January 21, 1999 10:08 PM
>Subject: Re: I am really starting to hate this timing thing
>
>
>>Hi all,
>>
>>I've been having this exact same problem with my '80 Spit. 1st I tried
>lining
>>up the dimples in the gears, then I tried setting the intake and exhaust
>valves
>>at TDC. Next, I tried setting max valve opening at 108 degrees (I have a
>Kent
>>road/rally cam), then tried setting it using their timing figures. All had
>the
>>same result, max power (I use this term loosely) seems to be around 25-30
>>degrees advance at idle, and 35-40 degrees at 3500 rpm (vacuum plugged).
>Even
>>with the timing this advanced, it doesn't ping. I have rebuilt this engine
>a
>>couple of times previously with good results and have had the cam for about
>10
>>years now without problem. As a desperation measure, I have put the
>original
>>cam back in, but haven't had a chance to get it all back together yet, so
>we'll
>>see if that fixed it, though I doubt it. I just don't know how to solve
>this
>>one.
>>
>>Any help greatly appreciated
>>
>>Cecil
>>'65, '80 Spitfires
>>'62 Vitesse
>>
>>James Carpenter wrote:
>>
>>> You do know that the engine will run better at idle the more advanced the
>>> ignition is, although 30 is abit excessive. Me putting the timing from
>10
>>> to 20 deg BTDC putt's the idle right up from 600 to 1000 ish. But then
>it
>>> pinks as soon as you drive anywhere, and has no go. The Spifire cam is
>>> symmetrical I think so that 7 and 8 rockers should be "on the rock" at
>0deg.
>>>
>>> You really need to look at the detailed instructions and pictures that
>are
>>> in the Spitfire 1500 workshop manual to set up the valve timing. It's
>not
>>> an easy job. But getting the correct tooth is less difficult. The marks
>>> left on the cogs by the oil give you good clues. Use the valve cover to
>>> give you 0 deg. That is near enough to allow you to pick the correct
>cog.
>>>
>>> You are tensioning the chain on the right bottom side?
>>
>
>
Patrick Bowen
'79 Spitfire
Jacksonville FL
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