pter_drgn

Ok, so say I install the emulator because my boost is down due the the wonderful weather we've been having here recently and it brings me back up to 22 psi. What happens when the weather cools off again. Do I need to worry about overboost then?

SuperHatch

iTrader: (23)

Just think about what you're asking, and you should be able to answer your own question. Not trying to be a dick, just trying to spark independant thought.

- Steve

ShapeGSX

A boost controller bleeds such a small amount of air that it shouldn't really matter.

SuperHatch

iTrader: (23)

If you add up enough small amounts of air, it'll become one big amount of air.

I was explaining why it's done, not trying to say it's the end of the world.

- Steve

ShapeGSX

And I was just clarifying that it wasn't the end of the world. It should also only bleed away boost when the wastegate is opening. Although, if air is bled away at all times, even idle, it could have an impact.

I seem to remember that my Eclipse's stock boost solenoid was in a pretty horrible configuration that could lead to leakage at idle if that bleed line wasn't hooked up.

So forget what I said until I see a boost line schematic for an Evo. It could have an affect. At WOT, the percentage of the air that is lost is miniscule. But at idle, it is a much larger percentage, and it could have an affect.

SuperHatch

iTrader: (23)

The BCS is normally open, venting air, so at idle it's a leak. As the engine management asks for less boost (taper at high RMS) the BCS closes, forcing the pressurzed air into the WG. So it's a significant leak at idle, and less of a problem at higher RPMs.

DEL TURBO

iTrader: (19)

I currently have a 1.3 bar spring in my Tial wastegate. I was planning to reinstall the factory boost pill so I can return to Xede boost control. I'm currently using a Hallman mbc. Is the emulator a better option than the factory pill?

gsujeff55

iTrader: (4)

No, i had the emulator on my car with the stock pill(the one near the compressor, not the BS). It still wouldn't let me run the boost i wanted on race gas, so i just put another pill in the wastegate line in between the wastegate and the T.

This allowed me to run much more boost, therefore, the numbers in the xede boost table had to be dropped to achieve pump gas boost.

SuperHatch

iTrader: (23)

The emulator does the exact opposite of the factory pill. The factory pill goes inside the line between the boost source/WG lin "T" fitting and the BCS. This pill acts like a flow limiter, forcing more of the boost source air to travel to the wastegate than to the BCS, this in turn lowers the maximum boost level. By removing this pill more air can flow out of the BCS and less goes to the WG diaphram. This effectively raises the maximum boost. What the emulator does is goes in the same spot as the boost pill, but you have to cut the line and put it in, and by doing this, it bleeds even more air to the atmosphere raising the boost even more. The emulator is used on Xede equipped cars that are still stubborn with the factory pill removed and won't hit the desired boost level. It effectively raises the enitre boost curve by ~2psi (IIRC Shiv can confirm).

- Steve