Search found 517 matches

by Tom W
Sat Aug 08, 2020 7:33 am
Forum: Series 2
Topic: oscillating idle and lack of power
Replies: 23
Views: 1600
Great Britain

Re: oscillating idle and lack of power

Peter, by vacuum canister, do you mean the vacuum advance canister on the original distributor? Or do you mean the reservac vacuum tank for the brake servo?

I think Marek and I have interpreted what you’ve written differently.
by Tom W
Sat Aug 08, 2020 7:12 am
Forum: Technical
Topic: Gunson Gas Tester
Replies: 6
Views: 380
Great Britain

Gunson Gas Tester

I’ve just bought myself a 2nd hand Gunson Gas Tester. I’m going to see if it helps with optimising tuning the Webers. It measures %CO at idle. I’ll easily be able to see a balance between one exhaust pipe and the other, but does anyone know what the actual values for %CO should be? I’ll be trying it...
by Tom W
Fri Aug 07, 2020 3:00 pm
Forum: Series 2
Topic: oscillating idle and lack of power
Replies: 23
Views: 1600
Great Britain

Re: oscillating idle and lack of power

It sounds like you have the vacuum take off in the same place the original vacuum canister was fed from. In that case, I would take the vacuum advance values from the genuine workshop manual, and base your map on that. There will be a bit of maths to do to populate every cell. The workshop manual da...
by Tom W
Sun Aug 02, 2020 9:33 am
Forum: Series 1
Topic: Clutch/ engine / ? Problem
Replies: 41
Views: 2653
Great Britain

Re: Clutch/ engine / ? Problem

So if the car has since been partially dismantled, and can’t be run to watch the crank movement, finding a way of forcing the pulley on the crank-nose backwards, before jemmying it forwards, is the only reliable way of establishing what the crank float is. I wonder if a pry bar, used gently, betwee...
by Tom W
Sat Aug 01, 2020 8:48 am
Forum: Series 2
Topic: oscillating idle and lack of power
Replies: 23
Views: 1600
Great Britain

Re: oscillating idle and lack of power

I think it depends on how the map quotes load. In the map Ralph posted above, load looks to be a percentage. So accelerating at wide open throttle the advance curve would follow the bottom row of the map. Deceleration from max revs to idle, with the throttle closed, would follow the top line, right ...
by Tom W
Sun Jul 26, 2020 8:30 pm
Forum: Series 2
Topic: WELDING AND CHICKEN WIRE ON BONNET ?
Replies: 7
Views: 774
Great Britain

Re: WELDING AND CHICKEN WIRE ON BONNET ?

The mesh is original. It’s there to protect the radiator.
by Tom W
Sat Jul 25, 2020 9:57 pm
Forum: Series 1
Topic: Painted wheels???
Replies: 31
Views: 2088
Great Britain

Re: Painted wheels???

That looks cool
by Tom W
Mon Jul 20, 2020 6:22 pm
Forum: Series 2
Topic: Front suspension set up problems... need help
Replies: 17
Views: 1190
Great Britain

Re: Front suspension set up problems... need help

If they’re new bars, and weren’t scragged after they were manufactured, they will take a set after fitting. You may have to adjust them a few times until they stop sagging. Check with the manufacturer if they’ve been scragged.
by Tom W
Sat Jul 18, 2020 8:46 am
Forum: Series 2
Topic: E type 4.2 triple webers swap for triple su carbs
Replies: 15
Views: 962
Great Britain

Re: E type 4.2 triple webers swap for triple su carbs

My car made 216bhp at the crank when tested on a proper rolling road. I bought myself one of those Road Dyno boxes, and that showed 226bhp when using the weight values and aerodynamic losses I’d found on the web. When I put the same power run through the software using the figures David (Heuer) arri...
by Tom W
Fri Jul 17, 2020 9:24 pm
Forum: Series 2
Topic: E type 4.2 triple webers swap for triple su carbs
Replies: 15
Views: 962
Great Britain

Re: E type 4.2 triple webers swap for triple su carbs

I should also add to the above list of checks, fuel delivery pressure and fuel flow rate.
by Tom W
Fri Jul 17, 2020 9:06 pm
Forum: Series 2
Topic: E type 4.2 triple webers swap for triple su carbs
Replies: 15
Views: 962
Great Britain

Re: E type 4.2 triple webers swap for triple su carbs

I have 45 DCOE 9s. Different models of 45 will have different progression drillings, so may need different components inside. I think the manifold I have is from Webcon. It came with the car, as did the carbs. The internals, I think, follow the specs recommend in Des Hammill’s XK engine book, except...
by Tom W
Fri Jul 17, 2020 6:25 pm
Forum: Series 2
Topic: E type 4.2 triple webers swap for triple su carbs
Replies: 15
Views: 962
Great Britain

Re: E type 4.2 triple webers swap for triple su carbs

I tried specialists to set them up when I first got my car as I thought Webers were a dark art and I’d never get there myself. When I learned a bit more, and had a go myself, I got things much better. I found there were basic errors the specialists hadn’t addressed, having given the car back saying ...
by Tom W
Fri Jul 17, 2020 6:17 pm
Forum: Series 1
Topic: Painted wheels???
Replies: 31
Views: 2088
Great Britain

Re: Painted wheels???

Painted, with a protective coating of grime. I don’t have time to clean and polish wheels.
by Tom W
Fri Jul 17, 2020 5:39 pm
Forum: Series 2
Topic: E type 4.2 triple webers swap for triple su carbs
Replies: 15
Views: 962
Great Britain

Re: E type 4.2 triple webers swap for triple su carbs

Whilst there’s nothing wrong with SUs, I wouldn’t give up on the Webers. They can be made to work just as well as SUs. The problem is, there’s no book settings to work to. A lot of it is left for the owner to figure out. With SUs, Jaguar did all the hard work, and published the settings in the works...
by Tom W
Fri Jul 17, 2020 6:45 am
Forum: Technical
Topic: Vacuum non return valve failure
Replies: 2
Views: 280
Great Britain

Re: Vacuum non return valve failure

That’s a good idea, thanks.
by Tom W
Thu Jul 16, 2020 9:23 pm
Forum: Technical
Topic: Vacuum non return valve failure
Replies: 2
Views: 280
Great Britain

Vacuum non return valve failure

Has anyone else experienced issues with the vacuum non return valve that sits on the reservac tank? Mine seem to last a couple of years max before some movement develops between the upper and lower halves, and it starts leaking air into the inlet. I must be on my 3rd by now. They’re all marked Trico...
by Tom W
Tue Jul 14, 2020 8:52 am
Forum: Series 2
Topic: Boot board dimensions
Replies: 14
Views: 942
Great Britain

Re: Boot board dimensions

That looks very smart.

What did you do for the clips that receive the pins fitted on the leading edges of the removable boards?
by Tom W
Mon Jul 13, 2020 7:44 am
Forum: Technical
Topic: BEST ENGINE OIL!!
Replies: 24
Views: 1450
Great Britain

Re: BEST ENGINE OIL!!

20-50 oil will be the same viscosity at temperature irrespective of whether it’s mineral, semi synthetic, or full synthetic. That’s one of the few things that is consistent across everything.
by Tom W
Sun Jul 12, 2020 9:10 pm
Forum: Technical
Topic: BEST ENGINE OIL!!
Replies: 24
Views: 1450
Great Britain

Re: BEST ENGINE OIL!!

I’ve not used it myself, but I’d count the Penrite you’re using in the list of classic suitable oils, by a reputable manufacturer, and of appropriate weight. If you’re happy with it, I think it’s fine.