Catch tank

[Rusty]

Catch tank has just turned up and it looks great, exactly what I asked for and has been made to a high quality. Great stuff for £40 delivered. Going to get the PCV etc. and then fit it up to see how it all looks, hoping that it will fit in with the existing stuff just right. Got to decide what I'm going to do with the IM solenoid, I think it's going to get disgarded for now so that I can run the pipe along the strut brace and into the head and I don't really like it anyway. Should look pretty decent when all finished. I've just got to decide whether I vent to atmosphere somewhere discreet like the inner wing but for now it's going to stay with the OEM plumbing, PCV etc.

[4WheelDrifter]

I hope you realise you can't completely discard the N80, if that's the solenoid you're refering to. If you do the ECU will throw a code and may even run in limp-home mode IIRC.

[Jamo]

Catch tank has just turned up and it looks great, exactly what I asked for and has been made to a high quality. Great stuff for £40 delivered. Going to get the PCV etc. and then fit it up to see how it all looks, hoping that it will fit in with the existing stuff just right. Got to decide what I'm going to do with the IM solenoid, I think it's going to get disgarded for now so that I can run the pipe along the strut brace and into the head and I don't really like it anyway. Should look pretty decent when all finished. I've just got to decide whether I vent to atmosphere somewhere discreet like the inner wing but for now it's going to stay with the OEM plumbing, PCV etc.

Your not suppose to use the PCV valve with a catch tank setup according to all information available on here and the internet.

Are you planning to do this Andy?

[Rusty]

I'm aware that the N80 needs to remain connected and it will do for now as it's neater and how the car should be.

Jamo, thanks for your concern, I have read many other threads and have decided to go a different route again. As such I see no reason why I can't use the PCV and a catch tank for my proposed setup. The catch tank isn't returning to the sump and if the rest of the pipework is all the standard then the presence of a catch tank makes no difference to the setup other than removing the oil vapours. The rest is standard.

I would suggest that the PCV has been removed in the past as it's not required when venting to atmosphere or when the N80 is removed but as already stated I'm leaving the rest of the plumbing as per standard and am going to replace some of the parts to ensure everything is A+.

If I do modify the standard pipework, remove the N80 or vent to atmosphere then I will remove the PCV but for the initial installation it's going to stay for the reasons above.

[Rusty]

Just offered this up to the car and it's a lot tighter tha I thought. The tank just fits in but I'm going to have to rethink the mounting brackets. No probs though, it'll fit just right. The inlet and outlet are in the right place and I've realised that I can use the now defunct AC pipe that runs over the back of the engine bay if I want. All good. Going to modify the tank or possibly have another one made now that I've know what dimensions, mounting brackets etc. I'm after. I'll put some pics up when it's not raining and so I've got a bit more time.

[newsh]

The PCV will partially close when it sees big vacuum, ie when the throttle closes and the one way valve to the IM opens. You must leave it in if you're still using the connection to the IM, if you're not I think it can be in or out.

[Rusty]

Here's a couple of pics





Just got to decide what to do with the Carbon canister now, I can plum it into the breather system, leave it in the IM and plug the holes or ??? Does it open on idle to vent fuel fumes to the IM?

Ideally I'd like to plumb it into the pipe that goes through the head so that it vents back into the inlet. There's a handy and now disused AC pipe that's perfect for this. It's as if Audi knew... maybe not

Final option is to plum it back into the original pipework and keep the PCV, flame traps etc. etc.

What have people done before?

[Rusty]

Just read Terry's post here and seen the light. Going to have a look at the fuel tank tomorrow and get a hose in there to vent the tank to atmosphere.

[Rusty]

Yey! All fitted and the car even works and everything

Used the AC pipe and plumbed back into the pipe that goes through the head and it's really neat. The tank fits great as it was designed to . I've taken the PCV out, blanked off the carbon canister until I can get in the boot and sort that out. I'll get some pics when I can get my hands on a camera.

The pipe that goes through the head is a little larger than the 19mm ID pipe I have and took a bit of effort to fit.
The hose comes from the top of the tank and then has to loop under the cross brace and this is really tight. I've tried to use a 90deg piece of old AC pipe here but it looks poor at the mo but does work.

Overall plaesed with it bar some fettling and a pressure test. Car runs well with it although there's no discernable difference TBH, not that I expected one, it's just good practice ot have a catch tank.

[4WheelDrifter]

Where does the fuel tank vent ATM, if you haven't sorted it out in the boot? Or have you left the fuel cap off?

[Rusty]

It vents the same way it did before but with no vacuum, just into the now redundant pipe...

Should be alright...

[newsh]

Thats looking well neat can you get another one? I like the way it bolts through the brace..

[4WheelDrifter]

Yeah. Sorry, I should've said, Looks neat Andy. 'Buggėr. Just like it ***** growed there, innit bey.' As they'd say down here.

It doesn't take long to sort the hose out in the boot.

[Rusty]

I got it off a guy on Ebay who along with his normal kit offered custom services. This was the second one, he made it FOC after I asked him to modify the original. If there's an order for 5 or more he was willing to do some discount .

The tank has 1 19mm inlet turned 90deg downwards so it points in the right direction, 1 19mm outlet 90deg towards the engine and AC pipe in my case, sight glass on the front where there's loads of space and is baffled. The volume is something between 0.5 and 1 litre, I've never calculated it. The mounting bracket is a piece of 1.5" angle welded within an inch of it's life on the back with a bracing triangle to make it even stronger. It's well made too

It fits in the gap a treat and the AC pipe is just made for the job too although it's OD is a little narrow. I went for the coil wound 19mm pipe but this was overkill and the head pipe is a little larger than 19mm so this made it difficult to get on there, some lubrication and brute force was required (!).

Stu, you got a pic of the pipe in the boot? Where / which side etc. would help.

More pics to follow in a bit.

[Rusty]

Piccys for you...