4AG cam cover breather

[30psi 4agte]

The breather has a series of baffles in it to try and stop oil entering the inlet system. If you just put a tube in to an exhaust side cover it will pump plenty of oil out.

You would think that But i removed the baffle's from the r/c when i modded my r/c's for the twin breather setup because i wanted to achieve the best possible flow ( breathing capacity ) . Even when running the 2bar of boost minimal ( almost no ) oil was pushed out the breather's - - so it can be done without baffles !

HOWEVER it is only now that i have the high lift cams in it that im am finding more oil than usual is being pushed out. I suspect this is because the cam profile is a lot bigger and when the cam is rotating it is flinging/ scooping up a larger amount of oil !!! and it is getting pushed out through the breathers.

I may end up putting baffle's back on the r/c's to stop this. They will be nothing like the factory setup as i dont think they pass enough air quickly enough to effectivley let the engine breath in my situation

All in all you will prob find that on a mildly worked engine you will get away with running no baffles.

One more tip i just thought of is that if you drill a hole in the back of the exhaust R/c you will find that there is webbing on the inside of the R/c.
if you puy a breather here you will have NO probs at all as the webbing acts as a baffle to stop the oil and the hole / breather is past the end of the cam so no oil is splashing up anyway !!!!
Hope that makes sense

I used to have a 90 deg 1/2 inch fitting here for a breather hose. -- i just drilled a hole tapped the thread and screwed it straight in !!! I think this is exactly what you need to do !!

[benjamin]

30psi: I think you just keep putting engine pics in to make all of us other 4a owner's jealous. Bloody Oath, you have the best one in existence...

[30psi 4agte]

ha ha NO NOT AT ALL !!! Just want to help where i can !!!

[Starfire]

The bit where he makes us drool is just a bonus.

[kingmick]

shame the breathers are just for show and way over kill!hehehehe
hehehe tell me why the leads need the extra insulation cause we in racing dont need them?
But, if i was to have a nice engine bay, id be very very proud to have a bay that looked as nice and clean! its a credit to your work and time mate!!
nice mix of old school and new school!, very very nice

[Valkyrie]

Hi,
Here are the pics of the new inlet, and where it hits the breather.

http://img84.imageshack.us/img84/8572/1000098vm5.jpg

Standard and modified

http://img91.imageshack.us/img91/3295/1000099el2.jpg

Cheers

[30psi 4agte]

shame the breathers are just for show and way over kill!hehehehe
hehehe tell me why the leads need the extra insulation cause we in racing dont need them?

I guess the breathers are a little over kill but i used to have a breathing issue with the engine when running 30 psi.(not any more ! ) I wanted to fix the prob once and for all and ensure that if / one day when i build a real 4agte and really run some BOOST 40+ psi that i would not have to worry !! -- So thats the reason for that one.

As for the insulation around the leads i am lead to believe that with the F#$KN high voltages of a CDI you can get some interference / induce voltage with other wires so i opted to fix a possible problem before it occured on that.

You may be able to shed some light on that one ???

[TA-022]

that all? cut off breather.

tap thread .. screw in 90 degreee elbow fitting.

Solved.

[30psi 4agte]

Yep thats it mate !

[allencr]

I'd go for a useful air filter, rather then 90% of the useless colorful crap!