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Triumph Torque    Cars    Spitfire/GT6  ›  MV1V 1500 best dizzy set up
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MV1V 1500 best dizzy set up Print
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Blubayou
June 22, 2013, 6:47pm Report to Moderator


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Evening all,

Just messing with the basic set up to get a nice idle (it has a splashy note to it), please note this is a Mk1V with a YC 1500 motor.

Started from basics but no better, (tappets, Compression 11.2 - 11.8 hot, dwell 40', dynamic ign 10') so probably carb related, but anyway I digress a little.

The dizzy is the original 1300 AC Delco unit, not overly worn as far as I know, but the point contacts are clean but do just not line up well, I also have noticeable timing scatter on the strobe. I seem to remember everyone poo-pooing this dizzy, so do I:

1 Leave it alone, it's working!
2 Replace the points with an electronic  pickup
3 Fit the proper Lucas unit (new dizzy & revcounter)
4 Go Lucas & electronic!
5 Even more expensive!!!!


Ignore, 5, it's a bit of a luxury.....


'73 Mk1V 1500
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TimW
June 22, 2013, 7:36pm Report to Moderator


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MEGAJOLT!!!!!!!!!!!!!!!


TIM WARD


1974 GT6 MKIII mallard blue, Type 9 gearbox, 2500 with HS6 SU'S, Rear disc brake conversion, Honda Civic Rad, Big brakes, 3.27:1 diff and lots, lots more!

NOW WITH EFI


Location: Worcestershire

Team 53 10CR 2011 finisher
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Bobbyspit
June 22, 2013, 7:43pm Report to Moderator

Midnight Blue
Club Member
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As Tim Says!


Location, Perthshire Scotland.
Events , Lots,
RBRR x 3,
10CR x 3
HCR x 2
LaCarrera Cannon Ball (1)
Auto Accose 1.
Dales Bramble.

Northern Camping organiser x 2 and new camping for 2015 to be arranged!!

Spitfire now powered by 2.0 Ltr Zetec 16v Spitfire, home built Megasquirt. 130BHP atw.
Great for overtaking.
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Blubayou
June 22, 2013, 10:22pm Report to Moderator


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Ha ha!

5! I knew it!

Worth a look I think  


'73 Mk1V 1500
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piman
June 23, 2013, 6:47am Report to Moderator


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Hello Blubayou,

if it's only the idle you are concerned about and the car runs well, I'd leave it as it is. otherwise option three.

Remember about the law of diminishing returns.

Alec


Oswestry, Shropshire.

Mk1 1\2 P.I., Reliant Scimitar GTE 6A, Jaguar Mk 2, very long term restoration.
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cliftyhanger
June 23, 2013, 7:08am Report to Moderator

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Tune it by ear/feel.

Take the car for a drive, and advance the timing until the car starts to pink under load. Then retard just enough to stop the pinking. That is about as good as you will get it.


Clive Senior

Location-Brighton, East Sussex
Foxy is here, 1500od tax exempt Toledo. Now has the decent engine back in Slant 4 engine bolted in, sprint box and axle. Just needs fettling and will be on the road....
Spitfire Zetec project is started work progressing slooooowly
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junkuser
June 23, 2013, 11:03pm Report to Moderator

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"I also have noticeable timing scatter on the strobe."

The Delco on my Spit was rather sloppy and gave this same problem so made an adapter to connect a flexible drive to the vernier adjuster and brought it through to under the dash on the drivers side so the timing could be adjusted on the road to get the optimal position.    Back to early 1900s technology, rolling car rather than rolling road.

Disconnected once set, but still in position for adjustment when required.
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Blubayou
June 24, 2013, 7:41pm Report to Moderator


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Thanks for the ideas guys. Just messing with the timing, found some interesting discrepancies. If I check the timing on number 4, it's a whole 4' behind number 1 consistently. Heaven knows what 2 & 3 are!

Based on this info I have timed it up at 12' on number one & it's all running well.

Have also ordered an 'Accuspark' unit as a cheap way of negating the crude points setup.

I'll update when fitted, be interesting to see if timing accuracy improves a little  


'73 Mk1V 1500
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junkuser
June 24, 2013, 11:09pm Report to Moderator

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"found some interesting discrepancies. If I check the timing on number 4, it's a whole 4' behind number 1 consistently. Heaven knows what 2 & 3 are!"

That's probably quite a common feature Blubayou, but not many people actually look for it.
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Blubayou
June 30, 2013, 8:31pm Report to Moderator


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Evening all,

just fitted the 'Accuspark' unit, easy to fit, nice quality.

Timing scatter gone!  

Just thrashed it around with the timing set at 18' @ 1000rpm.

No audible pinking under load, drives very well, 0 - 60 in 12.5s (sat nav) so it's going well.

Still have slightly rough idle, will investigate another day.  


'73 Mk1V 1500
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jamespworth
June 30, 2013, 9:36pm Report to Moderator


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Sounds good i'm sold.
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