Idiots guide for catch tank on a mk3 16v

[dubburke]

Trying to find an idiots guide, so i can sort out the breather pipe on a mk3 16v, so i can stop the t/body getting gunged up and lowering the octane of the fuel due to oily vapours....anyone?

[Diamond Hell]

If it's breathing that heavily then it sounds like you have a bigger issue to address, rather than just going for the sympton.

If you must fit a catch-tank it's just a hose into a container - something as basic as a Coke bottle will do.

[dubburke]

I dont have a problem with breathing, i just want to stop the oily vapours from lowering the octane value, i was told it was a good mod, the car has only 59k from new

[Diamond Hell]

I can think of about 101 better modifications to make to your motor before you add a catch tank.

Here's a test for you - disconnect the breather, shove it into a Coke bottle and go for a drive.

If it's faster against a timed exercise then it might be worth doing.

A tubular exhaust manifold or a good re-map is more likely to liberate rather more power than your proposed modification though.

[danny_p]

oil vapors arnt really an issue.     the abf  breather is desinged to catch and return 99% of the oil back to the sump anyway,    amount of vapor vs  air flow  meh