One for anyone with verniers.....does anyone happen to know if the O.D. of the Brazilian Bay servo fittings are the same as OEM German? As I understand it, the original uses 12mm I.D hose...I'm hoping either @Alex VW Heritage or @Josh_JK may be able to verify this....Vielen Dank
no, it's not. but an easy fix, drill some new holes, that's it ps. sorry, i did'nt read your post properly, forget the abowe
i've nothing to go off, as mine never had a servo fitted....trying to get a definitive answer is tricky because the US forums all talk in feet and inches, and the Germans worked in metric....it may not be super-critical, but when it comes to braking, I'd rather not chance using a fitting that's too small or a hose that's too big....and some of the installs I've read about are only one step away from a lash-up....
Same size, all fittings same, same master cylinder, same size vac pipe, just the 4 fixings to the bracket are different which means you need a slightly wider bracket.
Thanks @zed ....More specifically, I'm planning to drill and tap that little flat bit of casting between 3 and 4 inlet runner (Type 1 engine) a la T 25, so need to know what size the Hose I.D. is before buying an NPT barb...I've read that the hose is 8mm, 10mm, 12mm, 15/32", 1/2" and "it doesn't matter as long as it doesn't leak"....even even saw one person recommend that you T off from the 3mm vac signal to the air cleaner If I know exactly what O.D. the spigot is on the Brazilian Bay servo is (and assuming the check valve is the same) I can work backwards from there. Anyone know any good reason not to run Nylon straight up to the servo, rather than rubber/check valve/rubber/metal/rubber?
Mines currently using reinforced nylon hoze (which was my hose pipe - needs must) Someone used barrier pipe (not me as its not flexible enough , sure there are other reasons!)
I wouldn't honestly think the diameter matters if it's one of the larger bores (I wouldn't use a 3mm pipe!). You just need enough volume of vacuum to "replenish" the servo after the brakes have been operated.
Thanks for that @snotty.....I found some of those 'crazy straws' in the back of the kitchen cupboard, so was thinking of joining them together with selotape...what do you reckon? (sorry for being sarcastic....I think you're right it can't make that much of a difference, if it's there or thereabouts) Not keen on this ' imperiametric' measurement scheme that goes on....it's either on or the other. I realise you can use 1/2 ID hose on a 13mm fitting (if you could get it), but how many people would then assume you could use 13mm ID hose (if you could get it) on a 1/2 barb....plenty.....but it would leak like a b*stard.
think nylon would need push in connectors or compression fittings so more to think about than a jubilee clip... this is what i'm pondering at the moment....Lancashire hoses can make som solid overbraided with fittings for not much more than i'd pay for 'cheaper' servo hose from one of the usual suspects.....
Also thinking of buying some metric kunifer pipe (so it won't corrode) and bending to suit....probably around the same price as stock, but better quality (and more hassle)
TBH it's more to do with what size fitting I can reliably tap into the manifold casting....found a 1/4 NPT taper tap yesterday and 1/4 to 12mm hose tails are readily available...trouble is, if the servo spigot is for 13mm hose (1/2 inch =12.7mm) then using 12mm ID metric hose will be a squeeze
