[Noodles]

Maybe you can explain, as I don't understand, how carbon still builds up on valves if a quality OCC is installed. The only thing going in should be air, period. I have seen some of the poor OCC designs and I can see how lots of oil vapor can still get to the intake. There is also a second stage OCC that you can get (Boomba and Damond to name a couple). Stage 1 hooks to the intake manifold/PCV valve hose connection. Stage 2 hooks into the valve cover PCV/above engine induction tube hose connection. (copied from Damond Motorsports) The key here may be to use both stages.

Exactly like you said, with a quality setup there should be just air going in. So many people think they can by the 15 dollar special and it's going to work wonders. Parts that really work cost real money. This is a very expensive hobby if it's done right

 

[MidCow3]

Maybe you can explain, as I don't understand, how carbon still builds up on valves if a quality OCC is installed. The only thing going in should be air, period. I have seen some of the poor OCC designs and I can see how lots of oil vapor can still get to the intake. There is also a second stage OCC that you can get (Boomba and Damond to name a couple). Stage 1 hooks to the intake manifold/PCV valve hose connection. Stage 2 hooks into the valve cover PCV/above engine induction tube hose connection. (copied from Damond Motorsports) The key here may be to use both stages.

So are you saying when the air ignites with the fuel in the cylinder none of the carbon byproduct can get on the valves? Because the possibility of extra oil potentially coming into the intake is not the only source of potential carbon build-up, the burning fuel is the other. If an OCC is a critical element in preventing car build-up, why didn't Ford include it because it isn't a significant additional cost.

YMMV,

MidCow3

 

[14RRST]

Midcow, we're talking the TOPS of the valves, on the intake side, not the combustion chamber side. You will always have some small layer of carbon inside the combustion chamber (piston crowns, valves, and head). But heat, pressure, and let'n 'er rip usually cleans that out pretty good. There's nothing short of chemical or mechanical cleaning that will remove it from the top of the valves. The best defense is prevention. And Ford DID try to do something, in the form of a baffle plate near the head, but it does a crappy job, especially under boost and even moreso with modified engines.

 

[MidCow3]

Midcow, we're talking the TOPS of the valves, on the intake side, not the combustion chamber side. You will always have some small layer of carbon inside the combustion chamber (piston crowns, valves, and head). But heat, pressure, and let'n 'er rip usually cleans that out pretty good. There's nothing short of chemical or mechanical cleaning that will remove it from the top of the valves. The best defense is prevention. And Ford DID try to do something, in the form of a baffle plate near the head, but it does a crappy job, especially under boost and even moreso with modified engines.

14RRST,

Okay. Thanks for the clear response.

YMMV,

MidCow3

 

[ControlNode]

Also, some spent mixture in the cylinder can get on the top of the valves when they first open just before intake air gets momentum into the cylinder. Maybe only under no boost conditions. But if the cylinder has more pressure than the intake for even a moment you will likely see some get on the top of the valve. Variable timing on the intake cam is likely one of the best ways to prevent that.

Some how in my mind twin scroll may help some since if there is open exhaust over lap between opening and closing of exhaust valves of cylinders ending and starting exhaust cycles. Thinking of high pressure of just starting exhausting staring to push exhaust of cylinder ending cycle back into cylinder some, or at least stopping the exhaust flow, before the exhaust valves close. But I'm sure the engineers at Ford know better than I do.

 

[Winter6]

You "mights be" in the wrong car already and for surely an RS would most certainly overwhelm you! The 2015 Prius are on sale right now and are heavily discounted in anticipation of the new 2016 completely new Prius.

YMMV,

Rev her up, petal to the metal, go manual shift >>>>>>>>>>>>>>>>>>>>>>>....... MidCow3

The Prius are pretty nice, they have a much better color selection than the RS too.

 

[MidCow3]

The Prius are pretty nice, they have a much better color selection than the RS too.

Actually, I am buying one of those also to replace 2010 Prius in family in Supersonic Red!

 

[14RRST]

There does not appear to be much room for a catch can in here!

 

[pintobeaner]

There does not appear to be much room for a catch can in here!

View attachment 2119

Looks just like the Focus bay.

 

[14RRST]

That's because it IS a Focus, silly! There is not as much room near the passenger side firewall is what I meant.

 

[lymerock]

There does not appear to be much room for a catch can in here!

View attachment 2119

at least room that is easily accessible, I bet there will be a spot behind the front bumper.
that said, the more I've read the more I've decided that I don't plan to "fix" a problem until I see a problem.

very surprised nobody else has mentioned spraying
alky spray >>> catch can for keeping valves clean

few thinks spraying will do
-lower intake air temp by 50-100 degrees
-increases octane under boost (seen the numer 116 octane thrown around)
-reduces cylinder temperature by hundreds of degrees
-cleans combustion chambers and tops of valves
-allows you to run higher timing and boost safely (with a map that can utilize it)

only downside is you need to tune for it and if you run out, you will want a way to change to a safer map or carry a spare gallon at all times

 

[ControlNode]

at least room that is easily accessible, I bet there will be a spot behind the front bumper.
that said, the more I've read the more I've decided that I don't plan to "fix" a problem until I see a problem.

very surprised nobody else has mentioned spraying
alky spray >>> catch can for keeping valves clean

few thinks spraying will do
-lower intake air temp by 50-100 degrees
-increases octane under boost (seen the numer 116 octane thrown around)
-reduces cylinder temperature by hundreds of degrees
-cleans combustion chambers and tops of valves
-allows you to run higher timing and boost safely (with a map that can utilize it)

only downside is you need to tune for it and if you run out, you will want a way to change to a safer map or carry a spare gallon at all times

I can think of several reasons this is not being talked about... warranty (get into the ECU tuning and all bets off for warranty work), cost (no way a cheap setup for this is cheaper than quality OCC) and racing sanction rules (this would likely be a class changer or simply not allowed).

 

[lymerock]

I can think of several reasons this is not being talked about... warranty (get into the ECU tuning and all bets off for warranty work), cost (no way a cheap setup for this is cheaper than quality OCC) and racing sanction rules (this would likely be a class changer or simply not allowed).

I run scca and others as well, if you pull the fuse its disabled. talk weight if you like, but having it there does not push you from stock class.

will a OCC not effect warranty as well? Id imagine it would.

 

[ControlNode]

I run scca and others as well, if you pull the fuse its disabled. talk weight if you like, but having it there does not push you from stock class.

will a OCC not effect warranty as well? Id imagine it would.

Well, last I looked through the solo Street class rules I didn't see an allowance for such a system. If I was teching a car and owner could not show me the rule allowing it in the class they want to run they would get moved to class that does allow it, maybe Street Modified. As I read the rule the pulling fuse allowance was for disabling OEM systems such as ABS or ESC.

OCC has no impact on how the engine is managed and after being removed an OCC should leave no trace of install. Once anyone other than manufacture or approved tuner tunes the car, as other system requires, warranty is over as far as I'm concerned since someone had edited now the engine is managed and if done wrong can cause damage to the engine.

 

[pintobeaner]

That's because it IS a Focus, silly! There is not as much room near the passenger side firewall is what I meant.

True not as much as in the ST

 

[FoRS]

Catch Cans....

Catch cans... Or Air Oil separators. This can be a touchy subject, I for one will be designing and producing an air oil seperator. I have a CAD file started but till the car is in my hands I will just have to wait. Will you be adding a catch can?

 

[Ih8rice]

Of course. I think They should come standard on any forced induction production vehicle.

 

[ControlNode]

Now that SCCA added an allowance for them (as long as PVC system remains fully operational) in Street class it is very likely that this will be the first, maybe only mod I put on mine for a while.

 

[focus pilot]

I will not be adding a snake oil catch can. my engine will gladly eat anything that passes the factory separator

 

[Kingkalukan]

Your better bet is an Aux fuel system if you are trying to prevent build up on the valves.