DCR Oil mod....

[Slippi84]

Originally Posted by bullettdsm

Actually, I'm not in the car at the dyno (Matt is), but if there were any radical changes in the oil pressure, Matt would have noticed and told me. Keep in mind that the mod restricts at the head and my pick up is down low. But I think I see where you are going with that; did the restriction/blockage generate more pressure for the pump to push elsewhere? Not that I noticed, though I wasn't watching for it.


Well, guys, you're gonna have to 'splain that one to me. This is a mechanical/hydraulic change to our 2.0 design. It has nothing to do with the combustion chamber or the intake/exhaust tract (the area's that boost generally affect). What is does do is alter the workings of the valve train (by limiting oil to the valve train). Don't think of the dyno chart as a whp measurement, think of it as an rpm meter. As the rpm's go above 6800ish, the valves no longer do their proper job because the oil restriction does not allow them to work properly. Whether you are making 100whp or 500whp the relationship will stay the same. Power level actually doesn't come into play.

MB

That's why the mod has a greater effect at higher rpms on boosted applications though. At that point when the lifters don't do their job it's due to the speed of the engine and oil pressure. You can't do anything about speed but this changes the oil pressure part. True your engine and a boosted engine are moving at the same speed but a lifter that doesn't open a valve enough on a NA car will shortchange flow a lot less than a boosted engine flowin a lot more aire per second or millisecond. So the amont of time is the same that the valve does not open or close properly but the amount of air lost due to this isn't.

[Blitzeclips]

Originally Posted by Slippi84

That's why the mod has a greater effect at higher rpms on boosted applications though. At that point when the lifters don't do their job it's due to the speed of the engine and oil pressure. You can't do anything about speed but this changes the oil pressure part. True your engine and a boosted engine are moving at the same speed but a lifter that doesn't open a valve enough on a NA car will shortchange flow a lot less than a boosted engine flowin a lot more aire per second or millisecond. So the amont of time is the same that the valve does not open or close properly but the amount of air lost due to this isn't.

I'm no expert with motors or anything, but I really don't know if I can agree with that. Maxing out the motor's efficiency is maxing out the motor's efficiency- boosted or not. The motor doesn't change itself to accomodate for the turbo you just installed.

[Slippi84]

Originally Posted by Blitzeclips

I'm no expert with motors or anything, but I really don't know if I can agree with that. Maxing out the motor's efficiency is maxing out the motor's efficiency- boosted or not. The motor doesn't change itself to accomodate for the turbo you just installed.

Motors effeciency?? Explain?? I'm not talking about the ability of the motr to convert power I'm talking a bout a simple concept of time vs airflow. Airflow for x amount of seconds when the velocity of the air is higher will equate to more air period. Your are not maxing out the engine trust me even if you are boosted. With the ability to have your lifters operate more effectively at higher rpms you can increase airflow by having the valves open and close more idealy.

[Street 2G]

well i guess the only way to know, is to know!! has anyone with a boosted application tryed this out?

[Slippi84]

Originally Posted by Street 2G

well i guess the only way to know, is to know!! has anyone with a boosted application tryed this out?

There are enough who are that bought it we will know soon.

[Blitzeclips]

Originally Posted by Slippi84

With the ability to have your lifters operate more effectively at higher rpms you can increase airflow by having the valves open and close more idealy.

Maybe motor wasn't the correct word to place efficiency with. I was speaking in terms of the efficiency associated with the lifters in contrast to boosted versus not boosted.

But the velocity isn't going to effect the operation of the lifter, only the external unit is. So I still fail to see where an opening allowing X amount of air in based on it's rise/lift is going to allow more air in based on velocity. Of anything, you'll need to change the volume of the unit due to more velocity.

[Slippi84]

Originally Posted by Blitzeclips

Maybe motor wasn't the correct word to place efficiency with. I was speaking in terms of the efficiency associated with the lifters in contrast to boosted versus not boosted.

But the velocity isn't going to effect the operation of the lifter, only the external unit is. So I still fail to see where an opening allowing X amount of air in based on it's rise/lift is going to allow more air in based on velocity. Of anything, you'll need to change the volume of the unit due to more velocity.

Not sure what your saying with either of these statments

Picture the engine as a hose hooked up to a pump. You can't change the size of the hose but you can change the amount and the pressure. When you boost your engine your boosting the pressure and flowing more air or more water threw the hose. Picture that pump on the end of the hose is running 1psi of pressure and at the other end of the hose your blocking ad unblocking the opening to control the timing of flow. If the mechanism that is blocking and unblocking the end of the hose starts slowing down it will either stick open or not open and close fast enough and you won't perform as well. It's easy to understand that his mod is to help the valves or mechanism control flow more effectively but when it is working effectivly at at higher rpms a setup flowing 1psi of pressure through that hose and a setup flowing 20psi of pressure threw that same hose will be affected different because the amont of water(or air flow) lost by the setup not working right is more.