Whos connected their breathers to a vacuum?
Turbo Mini Forums

just wondering if anyone on here connects their breathers up to a vacuum on the inlet? Someones told me it gives better performance.

They said also on the plus side that it reduces oil leaks, but on the downside if you have a brake servo it can makeyour brakes worse.

Does it work with our turbo engines?

Previous Engine: 1040cc Morespeed engine, 1275 turbo head T2 Turbo Mirage Manifolds Megajolt
Previous engine: STD metro turbo, megajolt
Drives: 399bananahp (flywheel) Honda Civic Vtec b18c4 T28 Turbo 1968 Mini

Megajolt maps to download: http://www.jamesfawcett.co.uk/cms/index.ph...&gid=3&Itemid=3

and then what happens when it comes on boost? Nicely pressureised crankcase?

I've seen the future and tbh its Pie

the metro turbo had the breathers connected to the inlet manifold along with the red non return valve. when on boost the valve shuts and the crankcase breathers vent into the air filter box via the small pipe thats just after the filter.

the good point about this is the crap from the breathers does not go all over the engine bay.

the bad points are:
1 the non return valve breaks making a massive boost leak
2 there are a load of pipes you dont need and a mini engine bay is small enough as it is.
3 the crap from the breathers upsets the air fuel ratio ( probably as it cant burn the same as fuel and air )
4 its more to go wrong

the best solution in my mind is to fit a catch tank for the breathers and add an extra breather from the rocker cover for good measure.

yes mine are just to air to.

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

thankyou for your replies! wont be trying it then

Previous Engine: 1040cc Morespeed engine, 1275 turbo head T2 Turbo Mirage Manifolds Megajolt
Previous engine: STD metro turbo, megajolt
Drives: 399bananahp (flywheel) Honda Civic Vtec b18c4 T28 Turbo 1968 Mini

Megajolt maps to download: http://www.jamesfawcett.co.uk/cms/index.ph...&gid=3&Itemid=3

pmsl ./... u mean you`ll be changing it back ...

Everyone knows that instructions only have to be read if the thing doesn't work....

This is called Possative Crankcase Ventilation and use by all modern engines, including the A series ( not modern I know)

It is a crude system though but Visard and a few others tell of a system that works by using the escaping exhaust gasses, Turbo or not.

Watch this space

sure i've read something on here about it i think, seem to remember you need a one-way valve so the exhaust doesn't blow into the crankcase, or worse and spit a flame in there and grenade the whole engine.

alot of the minis over here run a PCV valve, which was was a factory item on a few models. Its the circle part in front of the carb and the seals in it can be easly replaced so there are no leaks. its basically a one way valve which keeps the engine in a vacumn , thus stopping oil leaks blowby and pressure in the engine.

i will be using this exact setup on my turbo motor but connected to the clutch breather instead. these can be bought new out hear and replacment seals are really cheap if bought second hand.

1152cc turboed mini clubman, most powerful 1.1L a-series?

http://boostmini.justboard.net/

nope i havent done it minimark.

Very interested in the outcome of that benjamin please let us know

Edited by jamesfawcett on 29th Jul, 2006.

Previous Engine: 1040cc Morespeed engine, 1275 turbo head T2 Turbo Mirage Manifolds Megajolt
Previous engine: STD metro turbo, megajolt
Drives: 399bananahp (flywheel) Honda Civic Vtec b18c4 T28 Turbo 1968 Mini

Megajolt maps to download: http://www.jamesfawcett.co.uk/cms/index.ph...&gid=3&Itemid=3