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by paul.jameson
Sun Oct 11, 2020 10:48 pm
Forum: For sale/wanted - Parts
Topic: 3 brush dynamo
Replies: 13
Views: 1053

Re: 3 brush dynamo

Interesting comment John (Whiting). Madam's 1927 Standard car had 12v electrics from new but a 3 brush dynamo and no sensible voltage regulator. Converting to 2 brush with an electronic regulator was a routine step for me - but, seemingly, a highly advanced move in the vintage car world. So far, the...
by paul.jameson
Sun Oct 11, 2020 10:38 pm
Forum: Four stroke
Topic: SQ 4 MK ll front crankshaft
Replies: 2
Views: 180

Re: SQ 4 MK ll front crankshaft

Wrong crankshaft. You have a Mk I front crank. Make up a suitable plug and tighten it well up. That worked well for me for almost 40,000 miles on my first Healey.
by paul.jameson
Sun Oct 11, 2020 10:35 pm
Forum: Four stroke
Topic: Sq4 MkI timing case breather pipe
Replies: 24
Views: 877

Re: Sq4 MkI timing case breather pipe

I have had a number of good and bad experiences with the MK I type pressure regulator, also used on the KH. My conclusion is that it it the regulator body which is the problem with poor performance. I have one body for which no combination of new springs or balls will work. The same new springs and ...
by paul.jameson
Sun Oct 11, 2020 10:26 pm
Forum: Four stroke
Topic: Heat proof paint
Replies: 7
Views: 400

Re: Heat proof paint

I use Plasti-Kote from B & Q or other DIY shops. On the cylinder, it lasts for years. On the head, you need to recoat from time to time. Don't take the head off - just spray some into a suitable receptacle and use a brush to dab it on. The time to do this is just before you enter the Concours.
by paul.jameson
Sun Oct 11, 2020 10:19 pm
Forum: Four stroke
Topic: Pushrod weights
Replies: 5
Views: 203

Re: Pushrod weights

Am I wrong, or is April 1st about 6 months away?
by paul.jameson
Sun Oct 11, 2020 10:16 pm
Forum: Main Chat Forum
Topic: sq4 tuning help
Replies: 12
Views: 914

Re: sq4 tuning help

Lucas worked on the basis of looking from the drive end - which is a perfectly reasonable approach. The rest of us tend to look from the other end - the driven end - so we get the opposite result. I found this when fitting the Powerspark distributor to my Healey. Powerspark work the same way as the ...
by paul.jameson
Fri Oct 09, 2020 6:05 pm
Forum: For sale/wanted - Parts
Topic: 3 brush dynamo
Replies: 13
Views: 1053

Re: 3 brush dynamo

I suspect the field coil is no different from the 2 brush type so should be readily available. The 2 main brushes are the same as the later type so available. The third brush is much thinner and probably difficult to find but I am pretty sure I still have some NOS original ones which are of no use t...
by paul.jameson
Thu Oct 08, 2020 9:45 pm
Forum: Four stroke
Topic: Oil line routing"tank to engine" square four
Replies: 7
Views: 249

Re: Oil line routing"tank to engine" square four

Can we have some more photos please? A 1957 Square Four should have the large face oil tank and a GB gearbox...............
by paul.jameson
Thu Oct 08, 2020 9:32 pm
Forum: Four stroke
Topic: NH Cysllinder head performance
Replies: 2
Views: 239

Re: NH Cysllinder head performance

I don't know the answer to your question, but I do know that the later cylinder barrel is shorter than the earlier one. It may be that the compression ratios remained the same by means of the different head and barrel. Why do it? And why change to the alloy head and enclosed pushrod barrel a couple ...
by paul.jameson
Thu Oct 08, 2020 9:24 pm
Forum: Ariel Talk
Topic: Engine rebuild - W/NG
Replies: 49
Views: 3481

Re: Engine rebuild - W/NG

Take the Morris SAE 50 out as its too slippery and replace with Morris Running - In oil for around 750 miles for lasting benefit.

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