Dose's Sometimes DIY and Pay Someone Home & Boat Improvement Thread

[Ozdavroz]

2 minutes ago, Dose Pipe Sutututu said:

Daughter wanted to for a spin too, she loves it when it doses, also cries when we come home and try to take her out of the baby seat 🥲 

I actually put the seat in for her brother, but he absolutely hates the shitbox.

Haha nice, my kids are the same two older boys say cars are boring while younger girls like them. My 1.5yo daughter watches D1GP on YouTube with me, holding a toy plate for steering wheel and making brmm brmm noises

[Dose Pipe Sutututu]

Haha that's wholesome as!

Looks like we're raising a generation of female rev heads and classic shit box owners 🤣

[MBS206]

2 hours ago, Dose Pipe Sutututu said:

Took the car out to see if it still starts, sure does.

Daughter wanted to for a spin too, she loves it when it doses, also cries when we come home and try to take her out of the baby seat 🥲 

I actually put the seat in for her brother, but he absolutely hates the shitbox.

Anyhow, so after looking at real boats, and transoms, bait tanks etc. and scupper valves attached to them, I came up with ideas to improve the catch can.

The primary goal was to stop the interior smelling like vented catch can shit when the windows are down OR when the HVAC is not recirculated.

My catch can has a sump drain/feed at the bottom, 2x cam cover inlets, 1x outlet back to the intake pipe and 1x vent at the top.

The initial theory was at idle, and off boost there would be just enough suction from the intake pipe (pre turbo) to pull back any smelly shit from the catch can before it could escape out of the vent (which does have 1x layer of foam and a fine mesh screen on top).

It kind of works, however on hot days, the motor is breathing more than the suction provided from the intake pipe (pre turbo) and there's a bit of vapours escaping (not a bit amount, but enough to piss me off).

I could have just sealed off the vent, however it would mean each time I take it to the track or decide to drive it with a bit of enthusiasm, I would need to remove the seal.

To address this, using scupper valve idea, I used a 3mm sheet of rubber and cut essentially a valve that requires a bit of pressure to crack open and vent.

Took the shit box for a drive today, came back and parked the car. No heavy stench, great success ☺️

I still would swap for a F80 LCI or W204 2012+ C63 AMG, if anyone is keen 😅

You'll likely find, you never really get pressure to pop that valve. 

If you are getting "pressure" it's going out the unrestricted hole before it hangs around to build up and pop the rubber flap. IE, it's headed for the intake pipe.

In reality, if we did it right, your "vent" would actually go to a PCB valve at the inlet, and you'd still have the two the intake pipe too. When in vacuum, motor sucks it in, when on boost, PCB shut, and you will be getting enough air flow past (if they've put the catchcan pipe on the inlet in a good spot, at the right angle) which will create suction.

Current setup in reality, you're just forcing it to the intake pipe.

[Dose Pipe Sutututu]

Oh you'll be surprised how much the motor breathes when it sees nearly 2 bar of boost.

That will definitely pop, but for now, more than happy with 99.99% of the crank case fumes and engine shit going back into the intake.

[Dose Pipe Sutututu]

Got bored, took 2x more photos of the shit box.

Just showing the valve is centred and not off centre like the previous photo which had a bit of shadowing.

[No Crust Racing]

Will all help with the for sale post when it's M3 time... 

[Dose Pipe Sutututu]

Will take much better photos when the time comes, I still want to do a sub 1m50s on street tyres at SMSP (just because). Then will slap on proper tyres and see if the car can get down to 1m40~45s range.

If it goes sun 1m40s without aero, then wow.. but I don't expect the shit box to go that fast.

[Kinkstaah]

So you can then buy a more expensive, less reliable, more boring and slower replacement that's harder to work on and you have no knowledge of?

[Dose Pipe Sutututu]

13 minutes ago, Kinkstaah said:

So you can then buy a more expensive, less reliable, more boring and slower replacement that's harder to work on and you have no knowledge of?

Correct  

I only know how inflict pain on myself.

[MBS206]

4 hours ago, Kinkstaah said:

So you can then buy a more expensive, less reliable, more boring and slower replacement that's harder to work on and you have no knowledge of?

I hear they also spin bearings like an RB26...

[Dose Pipe Sutututu]

4 hours ago, MBS206 said:

I hear they also spin bearings like an RB26...

Oh nah, S55 doesn't eat bearings, just the crank hub slips lol.

[MBS206]

6 hours ago, Dose Pipe Sutututu said:

Oh nah, S55 doesn't eat bearings, just the crank hub slips lol.

Ha ha ha, so they stopped the bearings spinning on the one you want, but then decided the crank hub should slip instead 😛

 

Stick to RB, at least you can work on it yourself. And now it doesn't smell of vapour

 

Also I still believe there's a chance your new flap doesn't "pop", as even though the engine might breath hard, it has a direct path with no restriction to the inlet, which when on boost should pull a bit of suction for you. If you do get pressure in the catch can id be very intrigued. Time to put a boost gauge on it, and a session at the track, then solid cover your vent and do another session

[Dose Pipe Sutututu]

1 hour ago, MBS206 said:

Also I still believe there's a chance your new flap doesn't "pop", as even though the engine might breath hard

I'll probably be putting the shit box back on the dyno again soon, I want to dial in the closed loop boost control properly. I'll have a camera facing the car/motor for fun too.

Just note, there are essentially 3x 10AN inlets going into the catch can and 1x going back to the intake pipe. Most of the time the catch can "return" to the sump actually is the crank case breather, pushing air out.

[Dose Pipe Sutututu]

So good putting the valve/flap on the catch can. My clothes don't smell like shit anymore.

Tempted to fully seal the catch can for daily use and feed all the crank case fumes back into the intake and expose the vent only when on the race track. 

Took my daughter to go visit her grandmother, now she's making spooling noises in the car lolol.

[MBS206]

7 hours ago, Dose Pipe Sutututu said:

So good putting the valve/flap on the catch can. My clothes don't smell like shit anymore.

Tempted to fully seal the catch can for daily use and feed all the crank case fumes back into the intake and expose the vent only when on the race track. 

Took my daughter to go visit her grandmother, now she's making spooling noises in the car lolol.

Do it. Or add a PCB and feed that part to it...

[Dose Pipe Sutututu]

12 minutes ago, MBS206 said:

Do it. Or add a PCB and feed that part to it...

That's an idea, like an exhaust flap.

But yeah nah, spent too much money on this shit box. 

[niZmO_Man]

You've come this far, so might as well...

[Dose Pipe Sutututu]

12 hours ago, niZmO_Man said:

You've come this far, so might as well...

knowing me, I will have a moment & end up doing something stupid, like spend more money on this shit box

[No Crust Racing]

SEQUENTIAL

[Dose Pipe Sutututu]

47 minutes ago, No Crust Racing said:

SEQUENTIAL

I'm more inclined to fit a ZF8HP to the shit box, just because it's nicer to drive and has much more capabilities than a sequential dog box.

However, low chance of either, too much effort and money lol