When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Hello everyone. I'm almost done with the drivetrain of my ls1 swapped 1978 trans am. I really was just going to delete the pcv system entirely and run breathers but this will be a daily driven car and I don't want oil everywhere or moisture settling in the oil. I don't have any of the original pcv system but I see my valve cover had a pcv valve on the rear driver side valve cover. I bought a new catch can from elite engineering a few months back and im not entirely sure how to run it with the pcv system. I've read dozens of threads but they are not clear enough to me, but if anyone could help me figure this out, I would really appreciate it. Thanks
Not even sure where i can mount the can, not alot of room in there! I'm looking for the cleanest and most effective option. Thank you
So I have seen some engines come with the PCV value in the rear of the driver side valve cover. During a swap I simply removed the PCV valve and inserted a plastic reducer. Then using a hose I connected the reducer to a plastic Y. Once the tube was split into two using the Y, I connected one part to the rear vent tube of the passenger side valve cover and connected the other part (with PCV value in line) to the front intake manifold port right behind the TB. You can keep that routing the same and add the catch can into the routing in between the PCV value and the intake manifold port behind the TB.
So I have seen some engines come with the PCV value in the rear of the driver side valve cover. During a swap I simply removed the PCV valve and inserted a plastic reducer. Then using a hose I connected the reducer to a plastic Y. Once the tube was split into two using the Y, I connected one part to the rear vent tube of the passenger side valve cover and connected the other part (with PCV value in line) to the front intake manifold port right behind the TB. You can keep that routing the same and add the catch can into the routing in between the PCV value and the intake manifold port behind the TB.
I really appreciate it my friend! Thank you so much!
What i just noticed about my valve covers is that there is no passenger side rear port, so I wouldn't need to "Y" the two rear ports. Would it be okay to leave the rear driver side pcv valve there or should I relocate it up front? I don't see a need in doing this but I can always drill out the bottom of the old pcv valve and use it as my fitting. How's my diagram below, okay to run?
That may work but if your catch can fills up fast one thing you can do is run the clean air to the back and the front passenger port to the catch can.
I was having oil consumption issues running it like you want so here is how I have mine now and works good......
- rear passenger is my clean air from throttle body.
- passenger front goes to catch can.
- I have my pcv valve after the catch can on the return back to the intake.
That may work but if your catch can fills up fast one thing you can do is run the clean air to the back and the front passenger port to the catch can.
I was having oil consumption issues running it like you want so here is how I have mine now and works good......
- rear passenger is my clean air from throttle body.
- passenger front goes to catch can.
- I have my pcv valve after the catch can on the return back to the intake.
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.
7 Most Reliable High-Performance Engines GM Has Ever Built
Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
Another PCV question 
