Search found 353 matches

by jagwit
Thu Jan 17, 2019 6:37 am
Forum: Series 3
Topic: 4 speed manual to OD conversion
Replies: 15
Views: 489
South Africa

Re: 4 speed manual to OD conversion

Hello Phil. The performance curves I posted are not my cars, not even real, they are copied from automobile-catalog, this uses car dynamics simulation software i.e https://www.automobile-catalog.com/simulation.php :lol: In that case, I can be more direct. I think those curves are seriously flawed. ...
by jagwit
Wed Jan 16, 2019 9:04 am
Forum: Series 3
Topic: 4 speed manual to OD conversion
Replies: 15
Views: 489
South Africa

Re: 4 speed manual to OD conversion

https://i.postimg.cc/kXDh2LC5/jag-torque-compare.png Colin, I find specifically your V12 HE torque graphs rather interesting! Below the dyno graphs of my ex E-type which had the 11:1 HE + EFI conversion. This run was done at 1800m AMSL where normally aspirated engines lose between 15-20% of the pow...
by jagwit
Fri Jan 11, 2019 4:47 pm
Forum: Series 3
Topic: 2.88 diff fitted
Replies: 6
Views: 291
South Africa

Re: 2.88 diff fitted

I do use a 2.88, a getrag 5 speed A picture from the car with a few things to do :-) What ratio is 5th on the Getrag? Oi!! Just a FEW things.... I should add that my experience is with the car at 1400m (4500') AMSL - where normally aspirated engines lose 15-20% of the power they make at sea level. ...
by jagwit
Fri Jan 11, 2019 3:29 pm
Forum: Series 3
Topic: 2.88 diff fitted
Replies: 6
Views: 291
South Africa

Re: 2.88 diff fitted

Drove the car again today.... Frikken bluddy marvellous!! Of course I'm being subjective, but I can't help feel that the car is happier now, MUCH happier. Now its a proper GT. With the 3.31 it was a misfit, not a GT and not a dragster either. I would also say that it FEELS as if the car accelerates ...
by jagwit
Thu Jan 10, 2019 5:59 pm
Forum: Series 3
Topic: 2.88 diff fitted
Replies: 6
Views: 291
South Africa

2.88 diff fitted

I have now fitted a 2.88 to my S3 (auto) Its important to understand that my car was fitted with a 3.31 by some PO. If my car had the original 3.07, I would not have bothered. But running 3300rpm @ 120km/h (our speed limit) seemed so wasteful. I removed the IRS (alone) in two hours - having done thi...
by jagwit
Thu Jan 03, 2019 6:32 am
Forum: Series 1
Topic: some observations......
Replies: 14
Views: 3049
South Africa

Re:

1. No point running the fan if the engine isn't running as coolant isn't circulating. I'm not so sure. My Series 3, XJS and both my Jensen Interceptors run their fans after ignition off- if the fans switch was on prior to switch off. I've been wondering how much circulation remains present due to t...
by jagwit
Fri Dec 21, 2018 11:38 am
Forum: Series 1
Topic: What causes plugs like THIS??
Replies: 27
Views: 2404
South Africa

Re: What causes plugs like THIS??

Update:

This car has now been driven quite a bit since doing all this work and the plugs are no longer fouling as per post #1.

I am now convinced that the vacuum leaks were the main cause of the plugs manifesting like this.
by jagwit
Fri Dec 21, 2018 11:31 am
Forum: Series 1
Topic: Faults found on '68
Replies: 6
Views: 377
South Africa

Re: Faults found on '68

I assume you have fixed them, Yep, its a "get-in-and-drive-with-confidence" car now. I keep telling the owner that he can now drive the 1600km from Pretoria to Cape Town (and back) with confidence, but after struggling with the car for over 20 years, I understand that it will take some time before ...
by jagwit
Fri Dec 21, 2018 11:22 am
Forum: Series 1
Topic: Faults found on '68
Replies: 6
Views: 377
South Africa

Re: Faults found on '68

Yep, except for the tyres, all problems sorted. With regard to the header tank, please refer to the drawing below: S1 Header tank.jpg The header tank on this car (a stainless steel aftermarket unit), has 3 hose connections: 1) Large pipe connecting to engine (thermostat housing): Hot coolant from en...
by jagwit
Thu Dec 20, 2018 8:20 pm
Forum: Series 1
Topic: Faults found on '68
Replies: 6
Views: 377
South Africa

Faults found on '68

I though I should summarize the issues found on a '68 FHC which I have " adopted" - just for your entertainment. Car belongs to a friend who does not have the know how to fix it himself. 1) Replaced distributor with 123 Bluetooth programmable version. Nothing wrong with original other than still usi...
by jagwit
Wed Dec 12, 2018 4:37 pm
Forum: Technical
Topic: Fuel Tank Sender
Replies: 9
Views: 426
South Africa

Re: Fuel Tank Sender

The situation at the filler cap is not quite the same as deep inside the tank (above the fuel). At the filler neck (and who knows how far in), the air to fuel ratio must surely be a lot more favourable for combustion than deep inside, with a lot more oxygen being present. I can accept that once the ...
by jagwit
Mon Dec 10, 2018 3:11 pm
Forum: Technical
Topic: Fuel Tank Sender
Replies: 9
Views: 426
South Africa

Re: Fuel Tank Sender

This has puzzled me as well!! My explanation (not that it IS the correct one...) is that the wiper arm is a "make before break" type contact, ie, it makes contact with the next winding before breaks with the one it is departing from. Also quite likely that it makes contact with several windings at t...
by jagwit
Mon Nov 26, 2018 1:48 pm
Forum: Series 3
Topic: tappet clearance
Replies: 13
Views: 708
South Africa

Re: tappet clearance

my actual VW van from 1989 the workshop manual show 2 different values for valve clearance. One is for a "warm" engine, one for cold. Fortunately it's too cold in my garage at the moment so I will not proceed at the moment. I will adjust when we have reached 20°C again. :santa: There is NO WAY you ...
by jagwit
Mon Nov 26, 2018 12:30 pm
Forum: Series 3
Topic: tappet clearance
Replies: 13
Views: 708
South Africa

Re: tappet clearance

By the way, does anyone have experience with the ambient temperature the Jaguar workshop manual refers to for tappet clearance adjustment?? Sven Sven, I recon you can ignore temperature. According to https://www.engineeringtoolbox.com/linear-thermal-expansion-d_1379.html , steel's linear expansion ...
by jagwit
Sat Nov 24, 2018 5:27 pm
Forum: Series 1
Topic: Sudden complete loss of fuel delivery
Replies: 44
Views: 3239
South Africa

Re: Sudden complete loss of fuel delivery

when you mention metal pipes you actually mean to say steel pipes Quite correct. Those fuel lines ARE mild steel pipes mostly aren't they? With some kind of anodizing on the outside - on my restored car anyway. I doubt the same treatment was applied originally on the inside correct? Thus exposure t...
by jagwit
Sat Nov 24, 2018 2:59 pm
Forum: Series 1
Topic: Sudden complete loss of fuel delivery
Replies: 44
Views: 3239
South Africa

Re: Sudden complete loss of fuel delivery

Frank We HAVE to assume there is rust inside ALL metal fuel pipes. On that basis I suggest as follows: 1) Fit an inline fuel filter between the tank and fuel pump (NOT AFTER the fuel pump) - this is to secure fuel pump operation; and IF there is a metal pipe transporting fuel from the glass fuel fil...
by jagwit
Fri Nov 23, 2018 5:56 pm
Forum: Series 1
Topic: Sudden complete loss of fuel delivery
Replies: 44
Views: 3239
South Africa

Re: Sudden complete loss of fuel delivery

Here is a picture of the scoring I referred to (from the jag-lovers site):
tn_Choke scoring.jpeg
tn_Choke scoring.jpeg (89.33 KiB) Viewed 614 times
Particles that can cause this kind of scoring can easily jam a fuel feed valve needle wide open or perhaps jam a fuel pump or block a fuel orifice?
by jagwit
Fri Nov 23, 2018 5:25 pm
Forum: Series 1
Topic: Sudden complete loss of fuel delivery
Replies: 44
Views: 3239
South Africa

Re: Sudden complete loss of fuel delivery

There has been a bit of focus on the choke mechanism on the V12 in a few S3 threads. I noticed that many of these choke mechanisms show severe signs of scoring where two flat plates slide over each other and I wondered WHY that would be, given that the fuel reaching the carbs OUGHT to be rather free...
by jagwit
Sun Nov 18, 2018 3:26 pm
Forum: Series 3
Topic: tappet clearance
Replies: 13
Views: 708
South Africa

Re: tappet clearance

Is the timing chain tensioner retracting tool necessary? You don't need it to get the cam sprockets off, I suppose, but you surely will need it , or something like it to release the tension on the chain to be able to get the sprockets back on. Be sure to release the locking catch on the tensioner B...
by jagwit
Tue Nov 13, 2018 5:19 pm
Forum: Series 3
Topic: Series 3 spark plugs colours
Replies: 17
Views: 943
South Africa

Re: Series 3 spark plugs colours

"Vacuum advance (vacuum direct from intake manifold)" This is WRONG. It is NOT wrong . I still want to verify this statement but I believe that just about every Series 1 and 2 E-type runs on manifold vacuum advance. A '68 S1 4.2 I recently worked on certainly did have manifold vacuum advance. I cha...