Manifold takeoff for brake servo

That's what I do, it's a common hydraulic size so cheap hose easily available. I use stuff with a nylon reinforcement given the choice.

 

@snotty - Thought I did similar whilst in bits. Now I've drilled the hole - this is the right place?

 

Looks ok, as long as it goes straight through to pick up manifold vacuum and is about, say, 10mm ID. On a stock setup, maybe putting it on the riser directly under the carb would be better, but I can't think of any reason it wouldn't work.

 

Like VW did it...
Make sure it loops uphill a bit rather than the neater low level install.

 

1 forward 2 back.
It looked like that part was made for drilling.
Now found a pic showing just below carb and sloping upwards.
I'd need to get that brazed though as I'll never mig that Nelly Cartwright.

 

Tap it and put a blank in.

 

Or find a pre-loved manifold with a servo take-off?

 

made this spigot for the left hand inlet, so you can fit either a straight or elbow barb for any clearance issues...needs Tigging though

 

Would you like it stuck on ?

 

It was made for drilling If it's ok, I'd leave it.

 

it's done and dusted...but thanks for the offer

 

A fitting with 8mm internal would probably do it I'm now thinking.
Just initially head your pipe up hill enough for passing petrol condensate to run back into the manifold rather than puddling in the pipe. The vacuum pulls back to the engine, but there isn't a great deal of air movement - just a little bit each time you use the brakes.

 

would you have to fit a non return valve in the vacuum line??

 

Always, though if you fit a brazillian servo it's built into the inlet.

 

mine is a universal brake servo, bought it to fit when I convert to rear disc, it came with a mounting bracket and hose, not sure if it has an internal non return valve

 

It wouldn't do anything bad having two if in doubt.

 

I'm sure I asked someone that question
Sticking with it.
Found an prototype bay link where several people had connected into the aluminium manifold and it worked ok.
http://forum.earlybay.com/viewtopic.php?f=4&t=18426&view=previous

Will turn upwards. Recon I can get a 12mm thread half way through the block.
@Skidmark - There's will be a one-way valve in the vac pipe, so it'll be a deadend pipe, which I guess means there shouldn't be much back flow up it.

Thanks for everyones advice.