38 replies to this topic

[volvo500bhp]

Hi all just interested to see what others have done if your running 500 plus hp ??? it might be helpful to others when they get to these silly numbers....

Russ

[lookforjoe]

Good idea for a thread - I was going to start one myself, with more conservative HP number

I for one would like some detailed info on routing, baffling, can size, hose size, etc

Yesterday I blew a quart of oil out my filler cap doing a short run @ 1.6bar.

If I keep it under that (1.55bar), the breather system can handle it.

EDIT: Just looked at your reply to me in your build thread, Thanks, Russ!

[550]

Just throwing this out there, but what about an actual catch can vented to atmosphere? Even with low boost I still shoot oil out the dipstick and the oil cap from time to time.

When I was running 22 psi, I was blowing A LOT of oil. I actually have a catch can, and I took it off when I had to swap in the new engine because emptying it was more of a PITA than I wanted for a daily driver. I may go back to it soon, as I recently started pushing the dipstick out. :-/


You could run hoses from the PCV ports directly as opposed to going inline with the existing PCV.

[Che'_Moderator]

volvo500bhp, on 08 November 2009 - 10:09 AM, said:

Hi all just interested to see what others have done if your running 500 plus hp ???

Drysump and pull vacuum on the motor.

[550]

Chuck, is the Jaz catch can considered a dry sump? There really is no way to pull vacuum on it right?

[shanehutton]

And I thought I was the only one blowing oil out my dipstick with a new PCV system and god compression. I'm following this thread now.

[lookforjoe]

Copied from this post

volvo500bhp, on 08 November 2009 - 08:24 AM, said:

Hi H

Pics as asked :





I hope this helps what are the other high hp cars doing on VS ?????

Hi Russ.

Many thanks! The CC looks smaller than I thought it was - I guess it really doesn't need to be particularly large. Does it have any internal baffles?

3 other questions -

Did you vent the rear can outlet back into the inlet plumbing?

If the lower port (a) was fitted to the bottom edge of the can, would that obviate the need for the additional "T" you added?

Do you know the fitting sizes used for the couplings & threaded ports in the block ( ?

I'd like to gather all the supplies ahead of time, so I can do this with minimum downtime.

[ozzimark]

Have you guys tried putting a check valve in the vacuum line that comes from the manifold? That may help out a few issues with over-pressurization of the system at high boost, since you're cutting off the supply of high pressure air into the system, outside of the actual crankcase and cylinder head pressures that the system is supposed to be dumping.

To borrow from one of your nice drawings Hussein, this is where I would put a check valve in.

[550]

WHOA. The setup volvo500bhp has is ridiculously intense.

[lookforjoe]

[quote name='ozzimark' date='08 November 2009 - 09:22 AM' timestamp='1257690175' post='1676101']
Have you guys tried putting a check valve in the vacuum line that comes from the manifold? That may help out a few issues with over-pressurization of the system at high boost, since you're cutting off the supply of high pressure air into the system, outside of the actual crankcase and cylinder head pressures that the system is supposed to be dumping.

To borrow from one of your nice drawings Hussein, this is where I would put a check valve in.

That would be simple enough - I have plenty of check valves left over from SAS removals - I'll certainly give that a try in the interim.

[shanehutton]

lookforjoe, on 08 November 2009 - 02:28 PM, said:

That would be simple enough - I have plenty of check valves left over from SAS removals - I'll certainly give that a try in the interim.

I have a couple of questions about this diagram.

1. Where is the vent line in the line between the camshaft cover and PCV tank going?

2. Why is the vacuum line tapped into the line from the PCV tank to the Catch tank? Wouldn't that just vent junk into the intake and not into the catch tank?

[Che'_Moderator]

550, on 08 November 2009 - 02:07 PM, said:

Chuck, is the Jaz catch can considered a dry sump? There really is no way to pull vacuum on it right?

NO.
And not the emissions system the entire engine. You get three primary befits.

1. More oil. A small system would be 12-14L
2. With vac on the entire bottom end you basically get 0 blow-by which leads to less oil in the charge, which in turn leads to the abality to run more boost or advance timing
3. With the ring under vac them "swell out and raise compression. Again more HP

To a lesser extent you pick up a few HP from lowering the windage on the crank, and depending on the pump maybe a few lbs off the drive belts.

[volvo500bhp]

lookforjoe, on 08 November 2009 - 02:19 PM, said:

Copied from this post

Hi Russ.

Many thanks! The CC looks smaller than I thought it was - I guess it really doesn't need to be particularly large. Does it have any internal baffles?
3 other questions -
Did you vent the rear can outlet back into the inlet plumbing?
If the lower port (a) was fitted to the bottom edge of the can, would that obviate the need for the additional "T" you added?
Do you know the fitting sizes used for the couplings & threaded ports in the block ( ?
I'd like to gather all the supplies ahead of time, so I can do this with minimum downtime.

Hi H

The breather pot is small it does not need to be any bigger for me some like bigger ones for show it does have internal baffles etc but i left the internals to the company that made it .

As for your question i am not sure to be honest i don't think it would work but would be worth a try i only guessed and made my own system up the main problem is the standard breather box is not great at low boost levels.

The hose and coupling are -12 and -10 i can look back and see what the exact details are for you.All i did to fix them to the block was dril a small hole in the block outlet then fix with a small screw i have also since the pic fitted a plate to make sure they don't come out.

Russ

550, on 08 November 2009 - 02:27 PM, said:

WHOA. The setup volvo500bhp has is ridiculously intense.

Hi 550 i am not sure if thats a good or bad comment LOL

Russ

[lookforjoe]

shanehutton, on 08 November 2009 - 02:47 PM, said:

I have a couple of questions about this diagram.

1. Where is the vent line in the line between the camshaft cover and PCV tank going?

2. Why is the vacuum line tapped into the line from the PCV tank to the Catch tank? Wouldn't that just vent junk into the intake and not into the catch tank?

Hi

The vent in the head pipe is theoretical - I haven't done that. I'm not sure where I would vent it to - the inlet tract, I guess.

The rationale behind the two vac lines is that the stock setup draws vacuum right at the PTC - which is much further along the line when you add a CC. I didn't have that originally - I added it in trying to track down my oil smoke issue. It was fine before without it.

As Lucky pointed out, any external venting creates a leak - I found even with a check valve in the dump line I got flaky AFR's @ idle - sometimes too lean (15.7) )sometimes to rich (12.7) - and either way, I get a P0131 CEL (front O2 signal). Since it made no difference to either relieving crankcase pressure or my oil smoke on decel, I put the breather line back on to the CC inlet today. I just added a check valve to the vac line immediately before my "T", so I'll see if that makes any difference to anything tomorrow.

volvo500bhp, on 08 November 2009 - 05:09 PM, said:

Hi H

The breather pot is small it does not need to be any bigger for me some like bigger ones for show it does have internal baffles etc but i left the internals to the company that made it .

As for your question i am not sure to be honest i don't think it would work but would be worth a try i only guessed and made my own system up the main problem is the standard breather box is not great at low boost levels.

The hose and coupling are -12 and -10 i can look back and see what the exact details are for you.All i did to fix them to the block was dril a small hole in the block outlet then fix with a small screw i have also since the pic fitted a plate to make sure they don't come out.

Russ

I see - so the block ports are actually not threaded.

If you don't mind looking up the specific components/lines you used, it would be very helpful. When you have time, of course!

[Johann]

I don't think line "A" is connected correctly. Basically it is the oil return connection at the block and is channeled all the way to the bottom of the sump. It should be connected to the bottom of the catch can.
Connection B is the vent hole for the block.

[socal850tuner]

Johann, on 08 November 2009 - 11:22 PM, said:

I don't think line "A" is connected correctly. Basically it is the oil return connection at the block and is channeled all the way to the bottom of the sump. It should be connected to the bottom of the catch can.
Connection B is the vent hole for the block.

but if he used this line as a drain like it is in the stock setup then all the crap from the catch can would just go back in and IIRC a good amount of sediment or other pollutants get caught in the catch can

[rbodor3]

A friend of mine with a built BMW is getting his vacuum by tapping into the exhaust. He has a check valve on it to prevent exhaust flowing in. He's pushing about 300 at the wheels.

[TorqueSteer]

lookforjoe, on 08 November 2009 - 10:10 PM, said:

As Lucky pointed out, any external venting creates a leak - I found even with a check valve in the dump line I got flaky AFR's @ idle - sometimes too lean (15.7) )sometimes to rich (12.7) - and either way, I get a P0131 CEL (front O2 signal).

Thats interesting, when I had the PVC line open to atmosphere, with no valve, AFRs were dead on and no codes thrown.

[lookforjoe]

TorqueSteer, on 09 November 2009 - 01:47 AM, said:

Thats interesting, when I had the PVC line open to atmosphere, with no valve, AFRs were dead on and no codes thrown.

hmmmmm... I wonder what the variable is. Maybe I should try it again with the vacuum line plugged. The checkvalve should have prevented a leak, but who knows. Wouldn't explain the rich AFR's, though.

rbodor3, on 09 November 2009 - 01:09 AM, said:

A friend of mine with a built BMW is getting his vacuum by tapping into the exhaust. He has a check valve on it to prevent exhaust flowing in. He's pushing about 300 at the wheels.

I never had an issue with the stock system @ only 300WHP.


that setup is typical US muscle car route... Summit sells kits for that.

[Bah]

Good thread..Hopefully one day i'll have to worry with 500hp =p

But, instead of this whole catch can and breather system...why not just get a fat chick to drink the oil? I mean...youd practically be doing her a favor, and thered be no waste, and you might even get lucky. just my 2 cents