Welcome to Ultimate Subaru Message Board, my lurker friend!
|Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.
We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!
Serving the Subaru Community since May 18th, 1998!
Weber Swap Questions: Exhaust/ASV, PCV, Vacuum
Posted 17 July 2012 - 11:50 PM
Passenger side ASV has a T before the valve. One end goes to the air filter and the other looks like it goes to another ASV silencer. Then there's another hose on the other end of that silencer that eventually connects to right before the second cat. For now I was thinking of just disconnecting that and leaving it and do the quarter trick on the valves. Anyone done a more permanent solution that involves removing it from the bay?
I was searching around and I found out what to hook up but had a couple of questions about setup.
There's already one hole in the bottom of my air filter housing. So, do I need another hole drilled in there? (i.e. One for the 5/8ths from air housing to passenger head and one for the 1/4 from F fitting to air housing...)
Also, the last two cars I've tinkered around with (my Sube and my '87 Econoline) there has been a filter inside the original air housing where the PCV connects to it. I swapped them out cause they were saturated with oil. Does anyone put an additional filter on the 1/4 line back to air filter? or is that not necessary?
What are these two valves? I couldn't find any mention of what they do in the Haynes and am still waiting for my Bentley. From my searching it seems that heater can go directly to manifold vacuum. Are these necessary?
Posted 18 July 2012 - 12:03 AM
I swapped out my intake manifold because I had the Weber/Carter. The intake manifold's temperature sensor is a little different (Also, on the other side.) It only has one prong compared to my old sensor had two prongs..
I just hooked it up with the same orientation even though it only has one prong. Does this matter?
Posted 18 July 2012 - 12:16 AM
For the exhaust I would assume a mid pipe from a non carter system car would bolt in and likely only have the resonator in that position. At a minimum it wouldn't have the ASV system pipe in it. I have always unplugged the two mentioned valves, removed them and their vac lines.
Posted 18 July 2012 - 12:54 AM
many people just run the basic pcv routing and have a breather cap or air inlet from the carb base on the passenger head, and route the drivers side head direct to the pcv valve. That foam filter just keeps oil out of the air cleaner assembly, a breather cap will have one if you want it to run from the air cleaner you can likely find a foamy filter inside a grommet to stick on there. Ive seen them before but I can't remember the application.
those valves are vacuum switches, and that sensor you have pics of looks a lot like a vacuum sensor for that system. its section 4A in your haynes. did you have a feedback system? if its for running carb stuff then you can obviously loose it now that the weber is on there, if you no longer have the sensors that run them I doubt they will work anyway.
if that is a temp sensor for your gauge use the old one that was matched to the gauge. if its a sensor for your old carb setup it doesn't matter anymore.
Posted 19 July 2012 - 12:33 PM
For the PCV, I was checking out the Weber air housing and am curious how the hell do you get both a 5/8ths and a 1/4th up in there.. Seem like there's barely enough space for just eh 1/4. I guess for now I could go with that simplified setup until I can figure out something better.
Anyone have some pictures of a correct PCV setup with a Weber?
I ended up removing those valves. So now I have manifold vacuum to a plastic T. One end of the T is capped and the other one goes to the heater. I guess the vacuum tube size on the heater is slightly smaller.
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users