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Hi everyone. Progressing on my LS powered 1978 trans am.
I purchased an elite catch can. I was doing some research but I couldn't find a straight answer. Is this catch can routing okay? Thanks
T that rear cover fitting to the driver cover.
What driver cover do you have? the reg fbody style or the kind with the steel tube with small metered orifice in it?
T that rear cover fitting to the driver cover.
What driver cover do you have? the reg fbody style or the kind with the steel tube with small metered orifice in it?
I'm plumming fuel and brake lines right now, I will take a picture as soon as I lower the car, i have a few engine pics, will these tell you anything? Thanks
Hard to tell. Does your driver cover have a pcv valve?
Basically do it like i said but when you T the two valve covers together put your pcv valve after the T.
That should be sufficient. You can route that to the side of the intake also if you want and then route the front pass cover outlet to the catch can, out of it and to the tb as well.
The issue with the front outlet is its just an open tube so the only thing keeping the oil mist down is the valve cover baffle. With a pcv valve on the back outlet you are metering that air and it will not push as much oil mist there, but the front then is unmetered and the airflow will normally take the path of least resistance on that and go through the front so you would need to filter it.
Hard to tell. Does your driver cover have a pcv valve?
Basically do it like i said but when you T the two valve covers together put your pcv valve after the T.
That should be sufficient. You can route that to the side of the intake also if you want and then route the front pass cover outlet to the catch can, out of it and to the tb as well.
The issue with the front outlet is its just an open tube so the only thing keeping the oil mist down is the valve cover baffle. With a pcv valve on the back outlet you are metering that air and it will not push as much oil mist there, but the front then is unmetered and the airflow will normally take the path of least resistance on that and go through the front so you would need to filter it.
here is a pic of the driver side
This here is my driver side valve cover, not sure if its a pcv valve or not
I just noticed that the valve covers I went with doesn't have a rear passenger side vent hole, I do have a set of valve covers that have the rear hole. Is there a huge positive use of the other set of valve covers?
Thanks, this is my first time dealing with pcv systems, I don't mean to be a nuisance so please forgive me lol
Ok great. that orig picture with the ict billet valley didnt have any knock sensors. Got me worried.
yea sorry, I just had it on there so I wouldn't get any dust in there while I was painting my other valley cover lol.
sorry to be a bother but do you think you could upload a sketch or find a good one online, just so it's easier to map out? I know many others will find it very helpful.
thanks
for around stock power you can keep the stock pcv layout
keep pcv valve in driver rear cover
connect driver rear cover to intake manifold vacuum (either side)
for pcv fresh air supply and blowby vent, connect passenger cover to top of the throttle body port, provided not boosted.
cap off passenger rear port.
you will notice pcv oil begin to saturate your intake manifold. it might be not bad, it might be terrible. thats where the catch cans will start to matter to you.
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Catch can routing 
