Can you guess what......

[v8s4me]

...this collection of odds & sods is for?



Here's a clue...



Got it yet? No?....



Of course! Obvious! But does it work?





Of course it does

Sometimes I amaze even myself

Many thanks to Tinks and Glen for enabling me to have this little bit of fun

[v8s4me]

How about a blow lamp and a blob of solder?



Holding at 20psi. Not pretty, but pretty effective...

Don't you just love Old School?

[v8s4me]

Maybe it's a non-stick pan?

[v8s4me]

And another bit of Old School Bodgery...



The original bodge covered the hole for the otter switch boss with a 1978 2p piece. What an amateur! As of course as we all know, decimal coins are (a) too small and (b) have too low a copper content for a permanent repair. A 1920 George V old penny does the job much more effectively.

Apart from a bit of blobby solder, well I didn't want to un-solder the top hose neck so I left cold water in the rad, job done! Or at least sorted until someone can do it properly.

While I was there I helped fit these....



Does anyone know how the fit the servo take-off to this manifold? I assume one of the cast bosses has to be drilled and tapped for a suitable adapter?

So now we have it running well, it might be nice if it stopped as well

Old School rules, OK

[v8s4me]

magpies said:

..you will need to drill all 4 inlet tracts and join them to end up with one hose to the servo

I thought the 4 hole drilling to the inlet tracts was for the vacuum advance to stop "pulsing". Do we need this for a servo as well?

[v8s4me]

Oldred_V8S said:

...Joe are you also anti-decimalisation as well now? .....

Only for covering big holes in radiators

[v8s4me]

Sorry if I'm being thick here, but....

Q. when does the servo need vacuum? A. when the engine is on the over-run.
Q. are the butterflies open or closed at this time? A. closed.
Q. so why does it matter if the mixture is affected at this time? A. ?
Q. if the servo is working on a vacuum where does the air to weaken the mixture on that cylinder come from? A. ?

Edited by v8s4me on Sunday 27th September 12:33

[v8s4me]

DamianS3 said:

..I would have thought the t to all 4 would also generate a greater vacuumed than just one.? ...

Probably, but how much vacuum do you need to make a servo work effectively?

[v8s4me]

magpies said:

....The vacuum hose to dissy will be about 4mm internal dia...

We can leave the vacuum advance out of this because this particular dizzy doesn't use one.

magpies said:

...The servo hose will have a non-return (check) valve, so does not loose its vacuum through the engine when not on overrun - only through the use of the brakes.

So that valve must shut off any air supply to the manifold then? If so, then back to my question about how taking the vacuum off a single inlet can cause an air intake imbalance.

Given that it is a 1700cc, another question is, will the vacuum from 425cc be sufficient?

[v8s4me]

Sounds like a sensible step-by-step approach.