Search found 516 matches

by jagwit
Thu Aug 27, 2020 7:31 pm
Forum: Series 3
Topic: Main jet loction in Stromberg carbs
Replies: 2
Views: 200
South Africa

Main jet loction in Stromberg carbs

I measured the depth of the main jets in my very well sorted car's ZS carbs to be 2.66mm from the bridge level to the deeper surface of the main jet surrounding the hole into which the needle goes. A friend working on a car that is idling pig rich found those jets to be at 2.7mm - much the same as m...
by jagwit
Tue Aug 18, 2020 7:04 pm
Forum: Series 3
Topic: What Causes Petrol to Leak from the Exhaust
Replies: 36
Views: 1127
South Africa

Re: What Causes Petrol to Leak from the Exhaust

If the carbs overflow out the front face, wouldn’t this mean that all fuel would still end up in the engine, and if too rich, cannot be burnt? I agree Colin. This by far one of the most inexplicable reports I've come across. Although the solution seems clear the symptoms remain a mystery - to me an...
by jagwit
Mon Aug 17, 2020 5:17 pm
Forum: Series 3
Topic: What Causes Petrol to Leak from the Exhaust
Replies: 36
Views: 1127
South Africa

Re: What Causes Petrol to Leak from the Exhaust

I am stumped!! :lol:
by jagwit
Mon Aug 17, 2020 4:59 pm
Forum: Series 3
Topic: Stromberg replacement recommendations
Replies: 1
Views: 215
South Africa

Re: Stromberg replacement recommendations

Whilst there are those who consider "Stromberg" a swear word, I recon it is, along with SU and Carter Thermoquad, one of the best carbs ever invented by man. Many a carb gets replaced simply because the fitted carb is not understood or the correct method of tuning it is not followed or understood. I...
by jagwit
Mon Aug 17, 2020 4:40 pm
Forum: Series 3
Topic: What Causes Petrol to Leak from the Exhaust
Replies: 36
Views: 1127
South Africa

Re: What Causes Petrol to Leak from the Exhaust

excess pressure was being applied to the fuel feeds into the carbs and the surplus fuels only outlet was the exhaust I'm glad the problem is sorted George, but I still can not see how the fuel gets into the exhaust without pouring out the main jet and being sucked into the engine via the inlet valv...
by jagwit
Sun Aug 16, 2020 11:52 am
Forum: Series 3
Topic: What Causes Petrol to Leak from the Exhaust
Replies: 36
Views: 1127
South Africa

Re: What Causes Petrol to Leak from the Exhaust

would then do nothing without having run the engine fully up to temperature for a significant period The only fluids in the car is : - Coolant - Fuel - Engine oil - Gearbox oil / ATF - Brake fluid If its not fuel and its not (combustible) condensate, it MUST be one of the others. I recon the next t...
by jagwit
Sun Aug 16, 2020 11:31 am
Forum: Series 3
Topic: What Causes Petrol to Leak from the Exhaust
Replies: 36
Views: 1127
South Africa

Re: What Causes Petrol to Leak from the Exhaust

For fuel to leak from the exhaust, it would have to be coming from a very flooded carburetor, with the result that the three cylinders fed by that carb wouldn't/couldn't be firing at all. Just to be clear, the two carbs on one bank feeds into a common plenum from where the two branches feed the fro...
by jagwit
Sat Aug 15, 2020 9:01 pm
Forum: Series 3
Topic: What Causes Petrol to Leak from the Exhaust
Replies: 36
Views: 1127
South Africa

Re: What Causes Petrol to Leak from the Exhaust

If the engine is running on all cylinders it CAN NOT BE FUEL. It CAN, and MOST LIKELY IS water that condensated to the cold exhaust pipe. Hot humid exhaust gas results in moisture condensating against the cold exhaust, causing droplets to form, which gets blown along the exhaust until puddles form, ...
by jagwit
Fri Aug 14, 2020 2:11 pm
Forum: Series 3
Topic: V12 Overheating: The contributing factors
Replies: 13
Views: 814
South Africa

Re: V12 Overheating: The contributing factors

Took my S3 for a 130km drive today (65km there and 65km back). Now that I REALLY have the cooling system sorted, I notice the following: 1) Alternator charging voltage no longer drops as low as before due to temp compensation; 2) Aircon works significantly better - better cycling of the compressor. ...
by jagwit
Mon Jul 27, 2020 10:05 am
Forum: Series 1
Topic: Correct length of IRS lower control arm for S1
Replies: 8
Views: 562
South Africa

Re: Correct length of IRS lower control arm for S1

You do not mention tyre size. If, as is too often the case, an S1 is fitted with 205/70 rather than the correct 185 R 15 in either H or V rating, it is very common for the tyre to rub on the bump stops . It is simply a function of the tyre being too wide for the aperture I can see that being the ca...
by jagwit
Mon Jul 27, 2020 9:19 am
Forum: Series 1
Topic: Correct length of IRS lower control arm for S1
Replies: 8
Views: 562
South Africa

Re: Correct length of IRS lower control arm for S1

Thank you Gents!! Excellent input. I am presuming that the owner is reading the manual on how it should be done :roll: I'll pass this on to the owner who is the one working on the car. At the time it did not occur to me that the drive shafts might be too short or that the brake discs might be too th...
by jagwit
Mon Jul 27, 2020 7:35 am
Forum: Series 1
Topic: Correct length of IRS lower control arm for S1
Replies: 8
Views: 562
South Africa

Correct length of IRS lower control arm for S1

Helping a friend who bought an S1 in pieces and is re-assembling it now. The car has so much negative camber at the rear, that the inside walls of the tyres are touching the bump stops. The amount of shimming required to correct it is so much that something is clearly wrong. I suspect that the lower...
by jagwit
Sun Jul 26, 2020 7:25 am
Forum: Series 3
Topic: Fuel return valve series 3 V12
Replies: 7
Views: 481
South Africa

Re: Fuel return valve series 3 V12

I once had issues on a classic Range Rover and it turned out to be the return line from the engine to the tank that was blocked.

For the sake of others reading this thread, I thought it worth while mentioning that the return line should also be open to allow flow of fuel.
by jagwit
Sat Jul 25, 2020 6:15 pm
Forum: Series 3
Topic: Rad air control flaps
Replies: 14
Views: 928
South Africa

Re: Rad air control flaps

Fspp369 wrote:
Sat Jul 25, 2020 5:29 pm

Mounting on the front of the rad is therefore a pointless excercise!
So we agree!

:-)
by jagwit
Sat Jul 25, 2020 5:11 pm
Forum: Series 3
Topic: Rad air control flaps
Replies: 14
Views: 928
South Africa

Re: Rad air control flaps

Spacers on the ends of the fan mounting “ spiders” to bring the tips of the fans back to assist in air flow ( according to a Cranfield engineer I know, something to do with tip vortex!!.) and the bottom flap is inverted. Mounting that lot in front of the rad must be an interesting excercise . Any p...
by jagwit
Sat Jul 25, 2020 3:47 pm
Forum: Series 3
Topic: Rad air control flaps
Replies: 14
Views: 928
South Africa

Re: Rad air control flaps

Fspp369 wrote:
Sat Jul 25, 2020 3:37 pm
Ahh yes but you haven’t spotted the difference.
Sorry, I don't understand.
by jagwit
Sat Jul 25, 2020 2:57 pm
Forum: Series 3
Topic: Rad air control flaps
Replies: 14
Views: 928
South Africa

Re: Rad air control flaps

Fspp369 wrote:
Sat Jul 25, 2020 10:06 am
Image
I once saw this cowling mounted IN FRONT of the radiator by a highly regarded Jag rebuilder here in South Africa. So, yep, we have those too.... :cry:
by jagwit
Sat Jul 25, 2020 2:53 pm
Forum: Series 3
Topic: Fuel return valve series 3 V12
Replies: 7
Views: 481
South Africa

Re: Fuel return valve series 3 V12

...the system in S3 is designed to recirculate fuel continuously to keep it cool enough to avoid vapour locks as underbonnet temperatures are higher than for S1/S2. The pump should settle down to a regular ticking once the float bowls are filled. The pressure relief valve should sizzle continuously...
by jagwit
Tue Jul 21, 2020 5:42 pm
Forum: Series 3
Topic: Pertronix install on S3 V12 help needed
Replies: 10
Views: 789
South Africa

Re: Pertronix install on S3 V12 help needed

Jjvflihy wrote:
Tue Jul 21, 2020 4:57 pm
I just installed the Pertronix ignition on my 1971 s3
It sounds like you installed the Ignitor.

Any particular reason why you did not go for the Ignitor-II ?
by jagwit
Tue Jul 14, 2020 10:45 am
Forum: Series 3
Topic: Pertronix install on S3 V12 help needed
Replies: 10
Views: 789
South Africa

Re: Pertronix install on S3 V12 help needed

It works great but you do have to be careful with coil resistance as the pertronix module can easily burn out. I believe this statement is correct for the original Ignitor (Ignitor 1). This does NOT apply to Ignitor-2, which has much more intelligence and will not switch the coil- to ground while t...