Looking at getting a catch tank breather made, how big etc?

[len_beach]

I'm getting a straight through silicone inlet elbow made up for my mk2 172 without a plug for the crank case breather.
I have 2 choices with the breather pipe. I can run a length of pipe along the underside of the car and vent it to the atmosphere. (Plan B)
Get a friend of my brothers to knock a catch tank. Just thinking about sizes and shapes of it and where I could fit it. Any ideas?
Or could I make one myself?
I have used a Coke bottle before LOL.

 

[Fred@BTM]

we fitted one to the blue car

if yoz is online, i'll get him to post a pic

 

[Lunner]

Coke bottle, or tweeks do a few you could use for ideas

 

[Lunner]

if you have one made up and its cheap enough i'll have one too

 

[len_beach]

I'll see what sort of prices they are.
Just need to know what sort of design I should ask him to look at as it will need to have a screw cap.
What sort of diameter is the crankcase breather?

 

[Fred@BTM]

off the top of my head its roughly a 7-8mm id pipe

 

[len_beach]

Am I right in thinking that if I fitted a small filter to the breather, it would clog very quickly and eventually blow off due to pressure build up?

 

[len_beach]

Am I right in thinking that if I fitted a small filter to the breather, it would clog very quickly and eventually blow off due to pressure build up?

Any ideas on the above?

 

[BenR]

nope, The breather area on the F4R is teeny weeny and imo undersized, so it wont blow off, it has a good baffle in the cam cover aswell.

I'd rather vent it under the car tbh.

 

[Nick Hill]

Spec-R type people make them already in al sorts of shapes and sizes. Try a google search.

 

[len_beach]

Cracking, a long length of pipe I think it will be then. Probably just leave the end of the pipe open and angle it towards the road. No need for a filter or anything then.
I'll have a look at the Spec-R jobbies though Nick. I've been offered a custom 1 litre for £55 though so that may be an option.