Search found 947 matches

by rfs1957
Sun Jan 24, 2021 2:53 pm
Forum: Technical
Topic: Thermostat
Replies: 83
Views: 18959
France

Re: Thermostat

This brings us nicely in a loop, as Andrew's post brings us back to the present, and this string has just been quoted in this one, where I gave details of getting the cut-off sleeve to work more efficiently. http://forum.etypeuk.com/viewtopic.php?f=4&t=17043 Did you try and see how the new thermosta...
by rfs1957
Sun Jan 24, 2021 1:55 pm
Forum: Series 1
Topic: Improving the 3.8 Sleeve Thermostat
Replies: 1
Views: 106
France

Improving the 3.8 Sleeve Thermostat

I'm aware that there are reams of exchanges concerning the 3.8 thermostat, but I couldn't find one that dealt uniquely with the subject, so rather reluctantly am starting this one. https://i.postimg.cc/qqkBVV8v/XXKFjSR.jpg If a moderator wants to tack it on somewhere else, please intervene. Any stud...
by rfs1957
Sun Jan 24, 2021 11:19 am
Forum: Technical
Topic: Removing silt and limescale from radiator
Replies: 29
Views: 1319
France

Re: Removing silt and limescale from radiator

I can report (Ed - confirm the obvious) that filling a rebuilt engine, together with its painstakingly cleaned-out innards, with highly lime-rich calcarious South-Of-France water is not a good idea. Quite how bad. Now, I had only intended for this to be for a couple of weeks with the engine on the t...
by rfs1957
Sun Jan 24, 2021 10:21 am
Forum: Technical
Topic: Building an Engine Test Bed
Replies: 18
Views: 1524
France

Re: Building an Engine Test Bed

Tests now completed - it's ready for your white-van-man to collect, Angus. I took these pictures before I dismantled it all, hoping they may help others make a similar thing, and avoid some of the pitfalls. My main motivation was to see whether my MegaJolt installation (which is very different) work...
by rfs1957
Tue Jan 19, 2021 5:43 pm
Forum: Series 1
Topic: MONZA STYLE OIL CAP
Replies: 2
Views: 277
France

Re: MONZA STYLE OIL CAP

Angus Moss now has my design and remaining stocks.

Moss Jaguar. +44 (0)1462 686682 enquiries@mossjaguar.com

https://www.mossjaguar.com/index.html

NOT to be confused with Moss-Europe or Moss Motors.
by rfs1957
Tue Jan 19, 2021 11:06 am
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 113
Views: 6219
France

Re: pre-programmed curves on 123 ignition - help please?

Yes, I just tried to plot a credible curve that lay within the vacuum spec boundaries. I'm still not happy with the point at which I'm exposing the advance to the vacuum effect though. Originally (just been testing with a vacuum gauge) the ported -vacuum only starts to read at all at around 1700 rpm...
by rfs1957
Tue Jan 19, 2021 9:56 am
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 113
Views: 6219
France

Re: pre-programmed curves on 123 ignition - help please?

With help from the irrepressible and helpful Rob at BritishVacuumUnit.com https://www.britishvacuumunit.com/ (they also do distributor rebuilds) I now have this extract from a Lucas book that confirms the same figures, reassuringly, that Jaguar specified in period. https://i.postimg.cc/mgkDXJNk/Luca...
by rfs1957
Mon Jan 18, 2021 5:54 pm
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 113
Views: 6219
France

Re: pre-programmed curves on 123 ignition - help please?

Here's an updated file with the suck parameters in both "Hg and KPa.

Image
by rfs1957
Sun Jan 17, 2021 6:18 pm
Forum: Pub Chat
Topic: Moving on. Bike resto
Replies: 53
Views: 11994
France

Re: Moving on. Bike resto

https://i.postimg.cc/VLG9BcCD/vztut4.jpg More here: https://www.liberiders.tv/2018/11/21/ducati-mike-hailwood-by-simpson-mecanique/ I wasn't being bashful, just missed this at the time, someone pointed it out to me just recently. I guess that the post about the 916, just above this, is another nail...
by rfs1957
Fri Jan 15, 2021 9:10 pm
Forum: Technical
Topic: DMBZ6A 3.8 Distributor Vacuum Advance 54412348
Replies: 9
Views: 356
France

Re: DMBZ6A 3.8 Distributor Vacuum Advance 54412348

Yes, I had an interesting exchange with BritishVacuumUnit in the US. Usual friendly, enthusiastic, and reactive, US approach. According to them both 54410415 and 54412348 had indeed exactly the same behaviour, being 7" - 14" - 8°, and were just different shapes and had different fittings. 0 advance ...
by rfs1957
Fri Jan 15, 2021 8:50 pm
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 113
Views: 6219
France

Re: pre-programmed curves on 123 ignition - help please?

I'm not sure quite where to post this. It stems from my wanting to make a map for the MegaJolt that is as true a representation of the original 3.8 ignition as possible, reflecting the effects of both the centrifugal and the vacuum vacuum advance, as I haven't found anything that comes remotely clos...
by rfs1957
Wed Jan 13, 2021 11:48 am
Forum: Technical
Topic: A different type of Engine Stand for the XK Engine
Replies: 36
Views: 10619
France

Re: A different type of Engine Stand for the XK Engine

Update from Julian, January 2021.

Selling well, new batch in production, look out for promo and adverts.
by rfs1957
Tue Jan 12, 2021 3:48 pm
Forum: Technical
Topic: Setting tickover with different camshafts - JAG4 from Guy Broad
Replies: 24
Views: 1257
France

Re: Setting tickover with different camshafts - JAG4 from Guy Broad

Cut the crap Crespin, talking down the value of my cams. I'll pay the shipping, just get them out of my sight. PS - but Mike Hailwood's 1978 TT-winning bike has the sweetest, most civilised, engine on the road of any bevel twin I have ever ridden ; it's a much nicer road bike than any - er - road bi...
by rfs1957
Tue Jan 12, 2021 2:52 pm
Forum: Technical
Topic: Setting tickover with different camshafts - JAG4 from Guy Broad
Replies: 24
Views: 1257
France

Re: Setting tickover with different camshafts - JAG4 from Guy Broad

Yes, there's nothing wrong with the manufacture : mine timed up to within 2° on every lobe. They're just sold by idiots, to idiots ; I bought them through Chesman (who were massacring my various engine parts at the time) on their advice, through Guy Broad. Perfectly civilised road cam, with more top...
by rfs1957
Mon Jan 11, 2021 3:49 pm
Forum: Technical
Topic: DMBZ6A 3.8 Distributor Vacuum Advance 54412348
Replies: 9
Views: 356
France

Re: DMBZ6A 3.8 Distributor Vacuum Advance 54412348

What an oracle you are.
Fantastic.
Will delve deeper.
by rfs1957
Mon Jan 11, 2021 2:43 pm
Forum: Technical
Topic: DMBZ6A 3.8 Distributor Vacuum Advance 54412348
Replies: 9
Views: 356
France

Re: DMBZ6A 3.8 Distributor Vacuum Advance 54412348

Yes, Christopher's numbers are indeed the same as my pink curves, and as the book. What is curious is that Martin Jay has no record of that Lucas reference, and that by all accounts the suck/advance curve cannot be a curve but only a straight line - unless there were two springs in series ?? Maybe t...
by rfs1957
Mon Jan 11, 2021 2:13 pm
Forum: Technical
Topic: DMBZ6A 3.8 Distributor Vacuum Advance 54412348
Replies: 9
Views: 356
France

Re: DMBZ6A 3.8 Distributor Vacuum Advance 54412348

Well spotted - think I've corrected it ??
by rfs1957
Mon Jan 11, 2021 1:57 pm
Forum: Technical
Topic: DMBZ6A 3.8 Distributor Vacuum Advance 54412348
Replies: 9
Views: 356
France

DMBZ6A 3.8 Distributor Vacuum Advance 54412348

I was looking this up to work out what a true original distributor "map" for the MegaJolt would look like. It will be of no immediate interest to anyone, but as I have the info fresh to hand I thought I would put in on the Forum for anyone who ends up searching for it in the future. https://i.postim...
by rfs1957
Mon Jan 11, 2021 9:36 am
Forum: Technical
Topic: Cylinder Head Tool Tray ??
Replies: 1
Views: 168
France

Cylinder Head Tool Tray ??

Don't lie, you've all put all kinds of crap in the hollow between the cams whilst working with the bonnet up. https://i.postimg.cc/jq7hQWsp/IMG-7294.jpg I knocked this up, it's a bit clunky, just to test the idea when shimming the cams recently, as it also stopped anything falling into empty spark-p...
by rfs1957
Sun Jan 10, 2021 4:34 pm
Forum: Technical
Topic: Setting tickover with different camshafts - JAG4 from Guy Broad
Replies: 24
Views: 1257
France

Re: Setting tickover with different camshafts - JAG4 from Guy Broad

Update on the Jag4 cam situation. I did retard the inlets 4° as suggested by Rob Beere, and it was marginally better, but still unsatisfactory in that it didn't respond logically or proportionately to bypass-screw adjustments, or mixture changes, never mind hoping to understand anything from SU pist...