Crank Case Breather SBC

[scuff]

I am going to fit a crank case breather to the engine. I guess the usual spot to place is the fuel pump blanking plate. The questions are...

Where on the plate do you position the tapped hole and the connector? Top middle or bottom or it really does not matter
I would like to use Aeroquip hoses (look pretty and match the rest of the hoses in the engine bay) Which do you use?
What connector and what size? Was thinking of a 10 (1/2" or 13mm)straight
Connecting to a 90 degree elbow connected to the hose.
compression fitting (if that is the right term, screw fit)to the hose at one end and a slip on, push fit connector at the other
Do you use a 90 degree elbow on the hose and then run the braided hose virtically, how far?
Do you use a compression fitting at the connetor at the blanking plate and then a push fit with "hose clip" style fitting at the filter end?
What Filter do you use?
Do you then support the braided hose with fittings on the bulk head or by fittings on the engine?
Does anyone have a picture or two?

Help.

Thanks in advance.

Scuffers.

[scuff]

As Steve D said "SBC's are heavey breathers"

I have the factroy PCV valves on the Rocker covers venting to a catch tank then atmosphere. The reason for the desire to fit a crank case valve is that I mistakenly drove the car for on a 10mile run without a PCV valve in the rocker cover. During the pre flight checks, after topping up with oil, I forgot to put the PCV back in the rocker cover, dohh. As a result there is some splatter, oil pressure was good on the run, however the difference in oil consumption was noticable. I guess that either the PCV's in the rocker covers are not working properly and or there is still too much pressure in the engine in the non pressurised areas, i.e. the crank case and thr rocker covers.


gtr-Gaz, do you have a picture of the vent where it joins the engine? Is it on the fuel pump blanking plate? do you have any issues with oil in the crank case at this point (assuming that the vent is connected there) as was suggested by p15ton?

Any thoughts?

Scuff

[scuff]

I guess then that (as they look identicle to the picture that Can Am Dave has shown) that they are either PCV's that are not connected or they are just breathers to atmosphere. I guess that if I take it off and try to suck / blow through it that I will find out?


I have been out and sucked and blew. They are PCV's (you can blow, but on sucking the vavle shuts) however they are not connected to the inlet manifold on the Carb, just to a catch tank. On blowing there is no restiction so they appear not blocked. I would then assume that there is still too much pressure in the crank case that is not venting. My earlier supposition about less oil consumption can not be true, I just thought it was.
Scuff.

Edited by scuff on Saturday 17th February 19:27

Edited by scuff on Saturday 17th February 19:29

[scuff]

Thanks Tuxman.

S

[scuff]

Gtr-gaz,

Off topic I know....I will mail you the details of the people for the Marham day this week. Just wating for one to get back to me. Will be there Sunday so can I have a gander at your breather?

As for the drilling and tapping, thanks for the offer however, I will have this done in the engineering shop at work.

Thanks for all the help from all who have posted on this thread.

Scuff.

[scuff]

Hello all,

I have completed the mod and fitted the engine breather. Nothnig ground breaking as there a quite a few who have fitted similar. Here is the result. Thanks to all who contributed and offered advise.

The final proof will be in the testing. Guess that when the car goes for a tune up at Track and Road (2nd April) will better know the results.

Thanks again.

Edited by scuff on Thursday 15th March 21:39

[scuff]

Sure I have about 20cm left, you can have it. Either ring me an give me your address and i will post or drop by and I can give you the hose and a beer.

Scuff