Search found 179 matches

by Tom W
Wed Jun 19, 2019 6:39 am
Forum: Series 2
Topic: Headlight covers for my 69 XKE
Replies: 4
Views: 244
Great Britain

Re: Headlight covers for my 69 XKE

Those do look stunning. It really cleans up the front end of the S2.
by Tom W
Thu Jun 13, 2019 6:44 pm
Forum: Technical
Topic: Strombergs to Su’s distributor
Replies: 27
Views: 691
Great Britain

Re: Strombergs to Su’s distributor

Exactly the same. Agreed then, it should be suitable for use with the Strombergs. Assuming there’s a suitable vacuum port on the Stromberg setup.

To answer the original question though, the Stromberg spec distributor (particularly one with vacuum retard) isn’t suitable for use with SUs.
by Tom W
Wed Jun 12, 2019 8:59 pm
Forum: Technical
Topic: Strombergs to Su’s distributor
Replies: 27
Views: 691
Great Britain

Re: Strombergs to Su’s distributor

I’d be interested to compare the advance curve for the twin carb UK spec XJ6 to that for the SU equipped E-type.
by Tom W
Tue Jun 11, 2019 7:33 pm
Forum: Technical
Topic: Strombergs to Su’s distributor
Replies: 27
Views: 691
Great Britain

Re: Strombergs to Su’s distributor

The curve and settings for the 123 will be the same for Strombergs as it is for SU's. The advance curve for stromberg equipped cars is different to SU equipped cars. There are possibly even different curves for the different variants of stromberg setup. SNGB list different part numbers for distribu...
by Tom W
Mon Jun 10, 2019 6:16 pm
Forum: Technical
Topic: Strombergs to Su’s distributor
Replies: 27
Views: 691
Great Britain

Re: Strombergs to Su’s distributor

The original distributor for SU specced engines used vacuum advance. The SU carbs will have a port of the vacuum take off, which you’ll have to plug if you fit a distributor without vacuum advance. It’s worth having, vacuum advance improves part throttle efficiency. Some stromberg equipped US cars h...
by Tom W
Sun Jun 09, 2019 9:14 pm
Forum: Technical
Topic: Strombergs to Su’s distributor
Replies: 27
Views: 691
Great Britain

Re: Strombergs to Su’s distributor

I think the 123 is available both with and without vacuum. You want the one with the vacuum signal. It doesn’t have a vacuum canister in the conventional sense, but instead a little electronic sensor. Theres a little stub on the side to connect the vacuum to and electronics inside sort out the advan...
by Tom W
Sun Jun 09, 2019 9:29 am
Forum: Technical
Topic: Strombergs to Su’s distributor
Replies: 27
Views: 691
Great Britain

Re: Strombergs to Su’s distributor

I would want to find out with the “Drop In” option from Simon BBC, what the curve actually is. There doesn’t appear to be any choice of curve, just a statement that says it’s specific to 6 cylinder vehicles. Any 6 cylinder distributor is specific to 6 cylinder vehicles, by virtue of having 6 HT lead...
by Tom W
Sat Jun 08, 2019 8:04 pm
Forum: Technical
Topic: Strombergs to Su’s distributor
Replies: 27
Views: 691
Great Britain

Re: Strombergs to Su’s distributor

My car is ex US. It has a 9:1 compression ratio. I have the JAG123 distributor. It is pre-programmes with 16 curves, which are supposed to be tailored to the Jag XK engine. None of them seem to match the curve for a UK spec S2 as it’s described in the workshop manual though. Not a problem for me tho...
by Tom W
Sat Jun 08, 2019 1:32 pm
Forum: Technical
Topic: Strombergs to Su’s distributor
Replies: 27
Views: 691
Great Britain

Re: Strombergs to Su’s distributor

The advance curve for US emission spec cars is different to that for SU equipped cars. You can fit a new distributor to the correct spec, or have the original rebuilt to give it the right advance curve. Alternatively, you could fit a programmable distributor like a 123 Tune, and draw the appropriate...
by Tom W
Mon May 13, 2019 6:23 pm
Forum: Technical
Topic: previous owners
Replies: 2
Views: 253
Great Britain

Re: previous owners

If you’re talking about registration in the UK, then I don’t think you need to. My car is a US import, and the V5 shows one previous keeper. That’s who I bought it from, who was the person who first registered it here. I’ve no idea how many owners it’s had whilst it was in the USA. It might say some...
by Tom W
Sun May 12, 2019 5:14 pm
Forum: Technical
Topic: Spinners self tightening??
Replies: 11
Views: 557
Great Britain

Re: Spinners self tightening??

What does the corresponding surface on the hub look like? Is there noticeable wear on the splines on wheel and the hub? The wheel is easy to check as the inner portions of the splines don’t contact the hub splines when the wheel’s fitted, so there’s always an unworn reference.
by Tom W
Fri May 03, 2019 5:12 am
Forum: Technical
Topic: Cutting a rear brake inspection / access plate
Replies: 9
Views: 531
Great Britain

Re: Cutting a rear brake inspection / access plate

You won’t be able to do much on the handbrake self adjusting mechanism through any access hole. The self adjusting mechanism is hidden within the actuating levers, so they’d have to come off the car to do anything with it. The mechanism on my car was working fine when I stripped the IRS, and I found...
by Tom W
Wed May 01, 2019 12:46 pm
Forum: Technical
Topic: Rev Limit
Replies: 1
Views: 161
Great Britain

Rev Limit

What’s the factory rev limit for the 6cyl engines? My tacho (1970 S2, originally US spec) red lines at 5000rpm. I’d always assumed all 4.2s went to 5000, and it was the 3.8s that went to 5500. Browsing through some cars for sale, I’ve seen some earlier cars than mine (still 4.2) have a 5500 rev limi...
by Tom W
Wed May 01, 2019 10:25 am
Forum: Technical
Topic: 5 speed options
Replies: 24
Views: 827
Great Britain

Re: 5 speed options

Thanks. My gearbox number starts KE, so I assume it falls under the K* range of ratios. With the 12.5in rolling radius, that would give the following spread of speeds in each gear for my gearbox. This is based on 1100rpm being the minimum rpm, 2250rpm the point below which you’ve dropped off the max...
by Tom W
Wed May 01, 2019 7:32 am
Forum: Technical
Topic: 5 speed options
Replies: 24
Views: 827
Great Britain

Re: 5 speed options

I’ve just plugged some numbers into the calculator. With a measured rolling radius of 12.5in, at 2700rpm in 4th, the calculator says I should be doing 69.7mph. At 1150 rpm, the speed would be 29.7mph. At 5000rpm, the maximum speed would be 129.1mph. I thought it would be higher than that. I have 205...
by Tom W
Tue Apr 30, 2019 9:00 pm
Forum: Technical
Topic: 5 speed options
Replies: 24
Views: 827
Great Britain

Re: 5 speed options

I do wonder what an overdrive 5th gear with the 2.88 would be like. It feels like it would pull it, but I’d probably be changing down to 4th every time the traffic slowed much below 65mph. Maybe only really any use for those interested in sustained cruising well above the speed limit, or for trying ...
by Tom W
Tue Apr 30, 2019 7:11 pm
Forum: Technical
Topic: 5 speed options
Replies: 24
Views: 827
Great Britain

Re: 5 speed options

Not sure if it is to do with kerb weight or the silky smooth V12 but the 2.88 does not seem to work well in the 6 cylinder cars. I’m curious why your experience of the 2.88 is so different from mine, and, it would seem, a few others on here. Is your car a 3.8, or a 4.2? Are the first 3 ratios in th...
by Tom W
Tue Apr 30, 2019 6:41 pm
Forum: Technical
Topic: Speed and revs, 60mph = 4100 revs!
Replies: 19
Views: 739
Great Britain

Re: Speed and revs, 60mph = 4100 revs!

You have a couple of options with the diff. You can either swap the whole diff unit for one with a different ratio, or you can have yours rebuilt with a different crown wheel and pinion. If your going for a complete swap, then you can either risk fitting the unit untouched, and hope it’s ok, or have...
by Tom W
Mon Apr 29, 2019 8:17 pm
Forum: Series 2
Topic: Triple webers
Replies: 11
Views: 535
Great Britain

Re: Triple webers

If you’re swapping from Strombergs, then converting to Webers is usually cheaper than converting to SUs. Webers are not purely for race engines and top end power, they can be tuned to work perfectly well on a road car. Plenty of other manufacturers successfully fitted Webers to road cars. I think th...
by Tom W
Mon Apr 29, 2019 7:54 pm
Forum: Technical
Topic: 5 speed options
Replies: 24
Views: 827
Great Britain

Re: 5 speed options

The 2.88 seems to go fine with the all synchro box in my S2. 1st is only necessary once I’ve come to a stop, and the engine is tractable enough for 4th at 30mph on the flat.