NPP Exhaust Valve Controls

[rkreigh]

sounds like exactly what I'm after

anyone have a link to the write up?

thanks!

[mike100]

Originally Posted by rkreigh

sounds like exactly what I'm after

anyone have a link to the write up?

thanks!

It's in the upcoming HoTB issue for April. (so no, not yet).

[USAZR1]

I wonder if this Mild2Wild set-up would work on our cars?
http://www.qpcpv.com/topflightreproductions/id34.html

[mike100]

Originally Posted by USAZR1

I wonder if this Mild2Wild set-up would work on our cars?
http://www.qpcpv.com/topflightreproductions/id34.html

M2W doesn't work stand-alone. You might search for "NPP in a box"- it is more geared to adding to cars without the system. It doesn't have any kind of rpm or engine load activation- Quite honestly, there's better ways to do it and cheaper too (The remote control is a nice toy, but it's just a wireless switch).

[XfireZ51]

USA,

What I have realized with mike100's help is that the NPP in a Box does not do what I THOUGHT it was supposed to do. I won't suggest that NPP is misrepresenting the operation of their NIAB unit. In fairness, NakidParts never designed this unit for installation in a C4. From reading the promotional material it "seemed" that NIAB would allow me to open and close the NPP actuators as I wanted to. That the actuators would remain closed regardless of throttle position or manifold vacuum. The conclusion that myself and Mike have come to is that
NIAB is really designed to allow the NPP actuators to open and stay open. However, the other position of the system is to simply allow the actuators to move with the swings in vacuum. IOW, you could get drone in situations when
Manifold vacuum drops allowing the actuators to open. My goal has been to keep the actuators closed in those situations. Mike and I have discussed how to do that. Mike will be presenting his solution(s). I am putting together something a bit less sophisticated but to do what I am looking to do. In the end, these configurations will cost substantially less than the $189 for the NIAB unit.

[USAZR1]

Originally Posted by XfireZ51

USA,

What I have realized with mike100's help is that the NPP in a Box does not do what I THOUGHT it was supposed to do. I won't suggest that NPP is misrepresenting the operation of their NIAB unit. In fairness, NakidParts never designed this unit for installation in a C4. From reading the promotional material it "seemed" that NIAB would allow me to open and close the NPP actuators as I wanted to. That the actuators would remain closed regardless of throttle position or manifold vacuum. The conclusion that myself and Mike have come to is that
NIAB is really designed to allow the NPP actuators to open and stay open. However, the other position of the system is to simply allow the actuators to move with the swings in vacuum. IOW, you could get drone in situations when
Manifold vacuum drops allowing the actuators to open. My goal has been to keep the actuators closed in those situations. Mike and I have discussed how to do that. Mike will be presenting his solution(s). I am putting together something a bit less sophisticated but to do what I am looking to do. In the end, these configurations will cost substantially less than the $189 for the NIAB unit.

Trust me,Dom,,I'm paying attention to what you,Mike,and others are doing with this "problem". Thanks for letting me tag along and ask questions.

[rkreigh]

I'm thinking some electric actuators like quicktime uses might be better

for now I'm going to just hook mine up to the canister vacuum and call it a day until this gets sorted out.

I've got the tips, just need to take the plunge and hack up a B&B

thinking about replacing the muffler with free flowing alternative as I understand the B&B "new style" mufflers make it more restrictive than the corsa.

time to fix that and let the beast eat.

[XfireZ51]

Originally Posted by rkreigh

I'm thinking some electric actuators like quicktime uses might be better

for now I'm going to just hook mine up to the canister vacuum and call it a day until this gets sorted out.

I've got the tips, just need to take the plunge and hack up a B&B

thinking about replacing the muffler with free flowing alternative as I understand the B&B "new style" mufflers make it more restrictive than the corsa.

time to fix that and let the beast eat.

Ron,

If you are going to spend the money and effort to hack the B+B, then just buy the DynoMax UltraFlows, sell the B+B including the resonator, and install the NPP
tips on the DynoMax. Install an EGR solenoid ($35 from Rock Auto), rocker switch ($4 from Radio Shack), and a one way check valve ($11 from NAPA).
That's the simplest setup, or do the mike100 system with RPM/Vacuum control.

[XfireZ51]

Next step in NPP controls install, check valve.
This will seal pipe from engine to solenoid whenever plenum drops vacuum.
Since the pipe runs from front to back, it will act as a "reservoir" providing a buffer from the variation in engine vacuum. That's why I've installed it by the blower motor. $8 from NAPA.
Now when I have solenoid closed, actuator will stay shut regardless of throttle opening. If I flip switch in console, the actuators will remain open, again regardless of throttle position.






Here's the EGR SOLENOID connected to the console switch via circuit starting in engine bay.
This is installed by the disconnected Charcoal Canister in rear passenger side corner.

[mike100]

That studded bracket was quite useful on my installation also.