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R1 breather vent to sausage filter?
corrado vr6 - 17/5/13 at 09:50 PM

Hi there, I have a 2006 R1 5vy, I have a spare or unconnected breather that I believe would have gone to the air box however I have a sausage filter so I'm thinking I could drill a hole in the sausage filter backing plate and allow the breather to sit in there technically as it would if it was in the original air box.

Any reason why I shouldnt do this or what I could do differently please when replying bare in mind I have IVA in a few days

thanks in advance Greg

maccmike - 17/5/13 at 10:07 PM

crank breather. put a crank breather filter on it.

snapper - 18/5/13 at 06:21 AM

There is no reason why not and I'm thinking of doing similar

adithorp - 18/5/13 at 07:56 AM

Should be fine. Stricktly speaking you shouldn't have it breathing to atmosphere, so it shoud go back to the inlet, although I'm not sure they check at IVA . Mine goes to a catch tank (converted ally' drinks bottle) then back to the air-box.

Have you done the breather mod' or are you leaving it untill after IVA?

corrado vr6 - 18/5/13 at 07:59 AM

Thanks for the replies so far, what's the breather mod that can be done?

adithorp - 18/5/13 at 09:14 AM

quote:
Originally posted by corrado vr6
Thanks for the replies so far, what's the breather mod that can be done?


Short answer... ESSENTIAL!

Without it there's a (large) danger that when cornering hard left, the oil surges to the height of the gearbox breather and then crankcase presure pushes it up the pipe, into the intake and then cylinders. Best case when that happens is only a bit of oil gets in and the car smokes. Worst case it hydralic locks and fooks the engine!

The mod is to convert the AIS housings on the cam cover to breathers That allows the crank pressure to escape by another routewhen the gearbox breather is flooded and so the oil doesn't have presure behind it and just runs back. The new breater is T'd to the old one, then into a catch tank (just as a precaution) and then either to atmosphere or back to the inlet.

Thread on the mod' HERE
A search will turn up loads of other references.

renetom - 18/5/13 at 09:15 AM

If its from the AIS, Just put a small cone filter on it
you can do the same if its the crankcase one temporarily
for the iva.
After which you should route the crankcase breather through a catch tank.

[Edited on 18/5/13 by renetom]

corrado vr6 - 18/5/13 at 01:53 PM

So could I just put a filter on for road use and do the mod if I'm thinking of doing track days, is that correct?

motorcycle_mayhem - 18/5/13 at 07:39 PM

On the road doing anything really, or testing for IVA or anything like that, no problem, putthe vent where you like. Technically, yes, should go into the airbox. Crankcase emmissions, along with a healthy negative pressure in the crankcase, all good things.

Take the car on a track and you don't want that vent anywhere near the airbox. You'll have a baffle in the sump, a very heavy overfill of oil and an engine screaming at 14K. You will empty the oil out of the crankcase breather if you don't vent the rocker cover too. Feed the vent from the crankcase and the vent(s) from the rocker cover into a header tank, then feed from the bottom of the tank into the sump (simply weld a JIC fitting on the sump).

adithorp - 18/5/13 at 09:06 PM

You should be fine for IVA and it might be useful to leave it, as some have found the emissions easier to meet with the AIS valves connected (some the opposite).

I initially ran without the mod and the breather into the air-box. No problem on the road. I did do one track day like that and got a bit of smoke so re-plumbed the breather to a Coke bottle at lunch time. Like that it fed 250ml of oil to the Coke bottle every session.

With the breather mod' I get nothing in my catch tank (so have no need to feed back to the sump), except if doing short runs in damp/cold weather, when I get a small amount of condensed water. The R1 is known to get a lot of condensation in the sump/crankcase when running like that (complaints common of milky oil); I used to get that but not now with the breather.