Rat Rod (running)

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Gillsfan
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Rat Rod (mobile timing)

Post by Gillsfan » Wed Sep 30, 2020 4:42 pm

Video of the timing after setting it to 14 btdc

https://youtu.be/4hqH4X2Idy0

And after revving it a bit

https://youtu.be/Qept8A0ta8M


Steve

What if the Hokey Cokey is what its all about

1969 SE 5 Manual O/D Rat Rod
RSSOC Jaffa cakes in a minute champion

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adamwilkes
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Rat Rod (mobile timing)

Post by adamwilkes » Wed Sep 30, 2020 5:03 pm

Have you tried revving it with the vacuum advance unplugged? Just wondering if that is sticking at times when the vacuum is working it.


Adam Wilkes
Scimitar GTE 5a 1973, kinda Highland Purple; after months of work, still a ruin!
I can't help myself - I have to ask questions and find out why. Why ? Dunno :shock:

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adamwilkes
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Rat Rod (mobile timing)

Post by adamwilkes » Wed Sep 30, 2020 5:06 pm

You need a new strobe light :lol:


Adam Wilkes
Scimitar GTE 5a 1973, kinda Highland Purple; after months of work, still a ruin!
I can't help myself - I have to ask questions and find out why. Why ? Dunno :shock:

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Gillsfan
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Rat Rod (mobile timing)

Post by Gillsfan » Wed Sep 30, 2020 5:54 pm

Just had a Facebook comment saying the timing needs to be set at 600 rpm and vac advance disconnected.

Just in case I've been a biff (again) what is the procedure ?


Steve

What if the Hokey Cokey is what its all about

1969 SE 5 Manual O/D Rat Rod
RSSOC Jaffa cakes in a minute champion

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adamwilkes
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Rat Rod (mobile timing)

Post by adamwilkes » Wed Sep 30, 2020 6:06 pm

Set contacts gap (if used) to 0.64mm when fully open; disconnect vacuum pipe run engine at 580 to 620rpm; strobe connected to No 1 cylinder HT lead (driver's side front); front pulley: "check that notch 1 [on pulley] appears to align with the relevant mark 3 or 4" (Brooklands Books Manual) . Notch 3 is the middle 'valley' in the timing metal on the engine, 10deg btdc. 14 deg btdc is the bottom of the 'V' on the driver's side.


Adam Wilkes
Scimitar GTE 5a 1973, kinda Highland Purple; after months of work, still a ruin!
I can't help myself - I have to ask questions and find out why. Why ? Dunno :shock:

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Gillsfan
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Rat Rod (mobile timing)

Post by Gillsfan » Wed Sep 30, 2020 6:36 pm

Ok I'm mostly doing that. Differences are with the idke screw all the way in I get about 650/670 hard to tell because he needle is bouncing about. I've got electronic ignition so not points and I'm setting to 14 btdc.

So here is a mark a made on the dizzy and coolant hose after I'd set the timing.
20200930_180742.jpg
20200930_180742.jpg (234.08 KiB) Viewed 331 times
And after I'd revved it he dizzy hadn't moved but the timing had.

Here is how much I had to move the dizzy to set the timing again.
20200930_181230.jpg
20200930_181230.jpg (284.02 KiB) Viewed 331 times
Had here is a video of the rotor arm movement

https://youtu.be/l4ilL5RV8M4


Steve

What if the Hokey Cokey is what its all about

1969 SE 5 Manual O/D Rat Rod
RSSOC Jaffa cakes in a minute champion

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scimjim
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Rat Rod (mobile timing)

Post by scimjim » Wed Sep 30, 2020 7:01 pm

I answered on Facebook but you have to be certain the rpm is the same for both readings and with a bouncing rev counter it doesn’t sound like you can be?

Also, the video seems to show a lot of missing sparks?


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adamwilkes
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Rat Rod (mobile timing)

Post by adamwilkes » Wed Sep 30, 2020 7:06 pm

Do you have a (automotive) multimeter that can read rpm? If so, it will be more readable than your rev counter.


Adam Wilkes
Scimitar GTE 5a 1973, kinda Highland Purple; after months of work, still a ruin!
I can't help myself - I have to ask questions and find out why. Why ? Dunno :shock:

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Gillsfan
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Rat Rod (mobile timing)

Post by Gillsfan » Wed Sep 30, 2020 7:27 pm

Jim

Video looks bad but it's just the video, in reality it's firing fine.

Adam

I have but I've never used it for RPM, wonder if I still have the instructions......

I've had the same fault with 2 dizzy's his, the only common part is the electronic ignition. Having fried the points I had (my miss reading of wiring diagram), I've order some new points.


Steve

What if the Hokey Cokey is what its all about

1969 SE 5 Manual O/D Rat Rod
RSSOC Jaffa cakes in a minute champion

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adamwilkes
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Rat Rod (mobile timing)

Post by adamwilkes » Wed Sep 30, 2020 8:08 pm

Something off the wall: is the crankshaft pulley sat correctly on it's woodruff key? If it's loose, it could all be a red herring.


Adam Wilkes
Scimitar GTE 5a 1973, kinda Highland Purple; after months of work, still a ruin!
I can't help myself - I have to ask questions and find out why. Why ? Dunno :shock:

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Gillsfan
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Rat Rod (mobile timing)

Post by Gillsfan » Wed Sep 30, 2020 9:36 pm

Adam

Can't hurt to check, although I'm leaning towards the electronic ignition. I've had it a couple of times where the engine seems to be funning/revving fine then it develops a pop. It's also about the only part of the ignition system I haven't changed :lol:


Steve

What if the Hokey Cokey is what its all about

1969 SE 5 Manual O/D Rat Rod
RSSOC Jaffa cakes in a minute champion

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Rat Rod (mobile timing)

Post by philhoward » Wed Sep 30, 2020 9:44 pm

I think I’ve heard of more issues with Accuspark (and clones) in the last 3 years than Lumenition, Piranha and Aldon systems in the last 25 years combined. :w


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adamwilkes
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Rat Rod (mobile timing)

Post by adamwilkes » Thu Oct 01, 2020 8:28 am

I thought you'd tried a standard dizzy in it already? Maybe not then :?


Adam Wilkes
Scimitar GTE 5a 1973, kinda Highland Purple; after months of work, still a ruin!
I can't help myself - I have to ask questions and find out why. Why ? Dunno :shock:

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Gillsfan
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Joined: Wed Aug 19, 2009 7:58 am
Location: Somerton, Somerset.

Rat Rod (mobile timing)

Post by Gillsfan » Thu Oct 01, 2020 8:45 am

adamwilkes wrote:
Thu Oct 01, 2020 8:28 am
I thought you'd tried a standard dizzy in it already? Maybe not then :?
I did try but I couldn't get it to fire. It turned out that it was my fault I misread the wiring diagram and fried the points. :oops:

I've ordered points and condenser and I'l fit them (correctly wired) and report back. In the meantime I have the brake and clutch problems to keep me out of trouble.


Steve

What if the Hokey Cokey is what its all about

1969 SE 5 Manual O/D Rat Rod
RSSOC Jaffa cakes in a minute champion

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Gillsfan
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Joined: Wed Aug 19, 2009 7:58 am
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Rat Rod (mobile timing)

Post by Gillsfan » Sun Oct 04, 2020 12:27 pm

Thank you all for your patience with me, I think it's sorted. Dizzy cleaned within an inch of it life and weights lightly oiled, new points and condenser fitted. Dizzy in and static timed, started and set to 600 rpm. Timing set, revs ajusted, timing set again. Steady 600 rpm timing doubled checked and position marked. Revved engine and not only did it sound good but the timing didn't move. Revved dime more and it's still good. Thank you all, seems it was the electronic ignition all along.

Just the brakes and clutch to sort out now :w


Steve

What if the Hokey Cokey is what its all about

1969 SE 5 Manual O/D Rat Rod
RSSOC Jaffa cakes in a minute champion

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