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For those running a catch can...

Posted: May 08, 2013 1:24 AM
by Nebraska_e28
What size lines are you using? 1/2", 5/8", 3/4"

Posted: May 08, 2013 4:29 PM
by T_C_D
5/8

Posted: May 12, 2013 2:20 AM
by Murfinator
-8AN 1/2" ID

Posted: May 12, 2013 10:09 AM
by winfred
draft tube dumping on ground, good enough for my diesel.... :D

Posted: May 12, 2013 12:00 PM
by turbodan
winfred wrote:draft tube dumping on ground, good enough for my diesel.... :D
If you've got good ring sealing, thats all you need.

Shouldn't have any oil coming out of the crankcase vent. Last time I did with my M20 was with blown up ring lands. Perhaps the M30 runs a little looser though.

Posted: May 12, 2013 10:00 PM
by winfred
15k or so of somewhat hard use with a blower and it doesn't leave spots or track back on the floor pan from the tube, almost 30k miles on engine build
turbodan wrote:
winfred wrote:draft tube dumping on ground, good enough for my diesel.... :D
If you've got good ring sealing, thats all you need.

Shouldn't have any oil coming out of the crankcase vent. Last time I did with my M20 was with blown up ring lands. Perhaps the M30 runs a little looser though.

Posted: May 16, 2013 9:22 PM
by rod2190
this might be a silly question but can u run open catch can if u still run motronic? i thought i read somewhere about having crankcase vent related idle issues but i might be mistaken

Posted: May 16, 2013 11:04 PM
by turbodan
The crankcase is only a potential air leak with the stock crank breather configuration. If you run it to atmosphere all you have to do is cap off the port on the intake that it used to be attached to.

You have to do this when you add boost so you don't boost the crankcase.

Posted: May 17, 2013 11:01 AM
by T_C_D
rod2190 wrote:this might be a silly question but can u run open catch can if u still run motronic? i thought i read somewhere about having crankcase vent related idle issues but i might be mistaken
This is correct.