After new aftermarket Vacuum hoses to replace my ones that are now in the bin.

 

Let me know if you've a set you don't need :thumbup1:

You can get them at a reduced price through SFS alternatively you can do as I did and simply utilise some generic vac hose of the correct diameter.

I've got silicone vac hose but I'm concerned about cavitation under high vacuum conditions. Don't want to risk it.

Mine been that way for about 1000 miles no issues.

It's going to niggle in the back of my mind - not what you want when on the track coming to a corner....

 

Any body got one?

i think i have a red silicon one you can have if that is the colour you are after if so send me name and address and ill see if i can find it

sounds silly but what or more so how does the brake booster work?

How about this for starters..

boostjunkies 2 meters of green 6 mm vac hose (12 mm exterior)

bran new, £10 delivered (this is over £10 per meter)..

 

your other options are to use ebay... very cheap stuff on there.. :)

How about this for starters..

boostjunkies 2 meters of green 6 mm vac hose (12 mm exterior)

bran new, £10 delivered (this is over £10 per meter)..

 

your other options are to use ebay... very cheap stuff on there.. :)

 

Thanks for the offer. I already have 3m of Blue 10mm silicone hose but would like the real thing as it's quite a critical part....

I realise it's under quite extreme circumstances but it's not actually that crucial. By that I mean if you lost the servo or clutch all together your still able to stop safely. I've driven home before with no clutch lol, I've also driven home with no brakes but that was a bit silly anyway back on point.

The whole purpose of a manual balance bar was to keep them seperate yeah? So loosing one doesn't negate the other. Running vac hose to the servo is no different to any other vac line in your engine bay. You could run a solid piece of tube to the servo, get a piece made up by a hose company, just like a brake line. This would then reduce the wall flex to virtually nil, only your couplers could move.

 

You could ditch the TT pedal fit an NA one which has a different leverage point and no servo to completely do away with the risk, it's not like your planning on sitting in traffic regularly.

 

It's also worth noting that the stock system is built with some, how to put it technically...guff. A series of vac tanks and hoses, many find there clutch booster fails as these expansion tanks etc detract from the engines full ability on the servo. I actually created an unnecessarily long line to help promote servo life span.

 

If your really keen on using something stiffer what about double walked braided hose, like what you use for oil, I severely doubt you would cavitate that in such a small diameter.

I realise it's under quite extreme circumstances but it's not actually that crucial. By that I mean if you lost the servo or clutch all together your still able to stop safely. I've driven home before with no clutch lol, I've also driven home with no brakes but that was a bit silly anyway back on point.

The whole purpose of a manual balance bar was to keep them seperate yeah? So loosing one doesn't negate the other. Running vac hose to the servo is no different to any other vac line in your engine bay. You could run a solid piece of tube to the servo, get a piece made up by a hose company, just like a brake line. This would then reduce the wall flex to virtually nil, only your couplers could move.

 

You could ditch the TT pedal fit an NA one which has a different leverage point and no servo to completely do away with the risk, it's not like your planning on sitting in traffic regularly.

 

It's also worth noting that the stock system is built with some, how to put it technically...guff. A series of vac tanks and hoses, many find there clutch booster fails as these expansion tanks etc detract from the engines full ability on the servo. I actually created an unnecessarily long line to help promote servo life span.

 

If your really keen on using something stiffer what about double walked braided hose, like what you use for oil, I severely doubt you would cavitate that in such a small diameter.

 

On the track I lost the vacuum to my brake booster via the old, cracked and brittle rubber fuel line fitted in Japan when the Auto-Manual Conversion was done. I can honestly say – from experience -that 130mph+ Sharp corner approaching +no brake booster = Brown trouser time and the use of a conveniently placed run off. It’s like stamping on a brick. I would not call this stopping safely.

My concern is at high engine overrun, the un-reinforced booster line may collapse – albeit briefly – causing a loss of vacuum to the booster diaphragm resulting in poor braking when you need it most.

I’m not concerned about the Clutch Vac lines as this is not safety critical. Happy to use normal silicone vac line on that (just need another check valve).

Just wanting to know if anyone has the 2 aftermarket hoses spare before I go online and buy some.

The other problem with using standard rubber oil/fuel line is there are some large bends required. Works fine when fitted in the garage but once up to temperature they can potentially crease too.

I know some will think I’m being over cautious but as a professional aerospace designer, I know when you can ‘make do’ with something and when to get the correctly designed/tested part and do it properly.

Where did I miss the important bit lol, were talking across purposes...I've had clutch booster stuck in my head.

Where did I miss the important bit lol, were talking across purposes...I've had clutch booster stuck in my head.

 

Thought your post did not really make any sense:wacko:

It's because we were talking about manual balance bars the other day. I have a tendency to do that, not see the wood for the trees.

bump

Ok, so really need one of this if anybody has one. After taking it out for it's first road test since fixing the brake vac lines with 10mm silicone hose i opened the bonnet to find this:

 

This is exactly what I was expecting, the hose almost fully closed under just idle vac pressure. Imagine what it's doing when your dropping down a gear and the vac is at it's highest!!!!

 

So, before i kill my self with lack of brakes, I need the correct moulded silicone pipes.

Put some braided hose in for that part at least it would keep with the tidy looking hose youve got going on there.