Search found 535 matches

by Tom W
Sat Feb 20, 2021 7:50 am
Forum: Series 1
Topic: oil dipstick
Replies: 18
Views: 3414
Great Britain

Re: oil dipstick

Remember on the saloon cars, the engine is angled backwards, and on the E-type it sits almost level. As the dipstick is at the back of the block, the angle the engine is at affects the reading. The sumps are also very different shapes, the volume being evenly distributed on the E, and at the back on...
by Tom W
Sat Feb 06, 2021 2:34 pm
Forum: Technical
Topic: Steering Rack removal
Replies: 6
Views: 219
Great Britain

Re: Steering Rack removal

It depends how easily the UJ moves on the splines. When I dismantled mine, it slid off without needing force.
by Tom W
Sat Feb 06, 2021 12:51 pm
Forum: Technical
Topic: Steering Rack removal
Replies: 6
Views: 219
Great Britain

Re: Steering Rack removal

I’d avoid using a hammer on the series 2 steering column and joints. The series 2 column is collapsible, and if you’re too brutal with the hammer, you could shear the nylon pins. The steering columns aren’t available any more, and they shouldn’t be repaired after they’ve been collapsed. But yes, if ...
by Tom W
Mon Jan 18, 2021 4:56 pm
Forum: Series 1
Topic: MR FIAT 6 SPEED TRANSMISSION
Replies: 9
Views: 680
Great Britain

Re: MR FIAT 6 SPEED TRANSMISSION

First gear is very low.
by Tom W
Thu Jan 07, 2021 10:30 pm
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 113
Views: 7157
Great Britain

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

I don’t know if the 123 vacuum sensor is a simple switch or a proper MAP sensor. One hopes it’s a proper MAP sensor, and the fact you can programme different values to different pressures suggests it is. Does the app show a varying vacuum value as you rev the engine? There are several factors that d...
by Tom W
Thu Jan 07, 2021 4:57 pm
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 113
Views: 7157
Great Britain

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

That’s disappointing. How are you determining them to be no good? The car didn’t perform as expected or you didn’t get the advance number you expected at a given RPM? If I’m following this correctly (I might not be) at 3000 rpm you have 24degrees of mechanical advance, and possibly up to 18 degrees ...
by Tom W
Thu Jan 07, 2021 11:40 am
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 113
Views: 7157
Great Britain

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

The switchable distributors with the 16 pre programmed curves are sold as manufacturer/model specific. Whether one of the 16 curves is suitable is another discussion. I was referring to the 123tune and 123tune plus (Bluetooth) which aren’t manufacturer/model specific, besides the physical mounting, ...
by Tom W
Wed Jan 06, 2021 10:21 pm
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 113
Views: 7157
Great Britain

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

I don’t think the Bluetooth 123 purports to come pre-programmed with a curve specific to a Jaguar. It’s not even specifically a Jaguar distributor, as it fits many 6 cylinder cars that used the Lucas 22D6. I think it’s expected that you adjust the curve to suit your particular application.
by Tom W
Wed Jan 06, 2021 2:08 pm
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 113
Views: 7157
Great Britain

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

Hi Steve. Yes, I’m referring to the distributors with the 16 switchable curves.

On the programmable versions, presumably you can just draw a curve without it if you didn’t want it.
by Tom W
Wed Jan 06, 2021 12:44 pm
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 113
Views: 7157
Great Britain

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

Additional to the above. The pre programmed 123 has a gearshift vacuum advance cut off, so at vacuum beyond a certain point (low pressure) the vacuum advance is actually removed. And on cars with ported vacuum advance, when the throttle is closed, the vacuum port is no longer exposed to the manifold...
by Tom W
Wed Jan 06, 2021 12:40 pm
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 113
Views: 7157
Great Britain

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

Yes, your assumption on the conditions for maximum and minimum vacuum are basically correct. Maximum vacuum under conditions of maximum engine braking, and minimum vacuum under conditions of maximum load. Any conditions where the engine speed is throttled by the throttle butterflies will see some va...
by Tom W
Mon Jan 04, 2021 7:11 pm
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 113
Views: 7157
Great Britain

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

Christopher typed his reply as I’ve been writing this, so apologies for duplication. KPa is an absolute measurement. Atmospheric pressure at sea level is about 101KPa. Figures below that represent vacuum, i.e below atmospheric pressure. The figures you list show no change until 87KPa adding a maximu...
by Tom W
Mon Jan 04, 2021 5:51 pm
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 113
Views: 7157
Great Britain

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

Tom, now I am confused about your statement about static setting. The instructions say to set the static at 10 BTDC. The screen advance degrees are crankshaft degrees. Therefore for example you program 0 degrees at the beginning and if you want a max of 30 degree, you input 20 degrees as the max. A...
by Tom W
Mon Jan 04, 2021 1:20 pm
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 113
Views: 7157
Great Britain

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

The numbers for the vacuum curve are on the left hand side of the workshop manual photo. You need to convert from inches of mercury to KPa for the pressure values. The corresponding values for advance in the workshop manual are distributor degrees, so they’ll need doubling to get the values for cran...
by Tom W
Tue Dec 22, 2020 9:35 pm
Forum: General
Topic: Merry Xmas everyone
Replies: 23
Views: 927
Great Britain

Re: Merry Xmas everyone

Merry Christmas everyone!
by Tom W
Sun Dec 06, 2020 10:56 am
Forum: Technical
Topic: Compression Test
Replies: 35
Views: 1749
Great Britain

Re: Compression Test

Try a different compression tester before dismantling the engine. Maybe the gauge isn’t too accurate.
by Tom W
Sat Dec 05, 2020 5:49 pm
Forum: Technical
Topic: Manual Box with 2.88 Rear Axle
Replies: 11
Views: 893
Great Britain

Re: Manual Box with 2.88 Rear Axle

I swapped from the 3.54 to a 2.88. I have the standard series 2 manual gearbox. No problems with the clutch, but I don’t live in a particularly hilly part of the world.
by Tom W
Sat Nov 07, 2020 9:27 am
Forum: Technical
Topic: Setting tickover with different camshafts - JAG4 from Guy Broad
Replies: 24
Views: 1572
Great Britain

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

If you can’t get any specs from the manufacturer or supplier, then you should be able to measure them fairly easily. You’ll need a timing wheel and a dial gauge. I believe timing and durations for aftermarket cams are usually quoted at .050” lift. I don’t know what the equivalent lift is for the fac...
by Tom W
Sat Oct 24, 2020 1:35 pm
Forum: Technical
Topic: electrical wiring
Replies: 7
Views: 715
Great Britain

Re: electrical wiring

Do any of the other ignition switched circuits work?
by Tom W
Sat Oct 24, 2020 6:21 am
Forum: Technical
Topic: electrical wiring
Replies: 7
Views: 715
Great Britain

Re: electrical wiring

What year is your car? Do you have points, or electronic ignition?

Are you saying you have power to the coil when the ignition is on, but none when the engine is cranking?