stinky

It has a selinoid that is controlled by the boost controller and the boost controller somtimes has its own map sensor and you just run a vac line to it from your manifold.

Reddy

I've got a blitz SBC electronic boost controller and its awesome. I can adjust the boost within a tenth of a psi, I can adjust the boost on the fly so I don't need to stop the car and pop the hood the adjust the boost, it has a digital peak and hold so you know exactly what max boost was, it has a playback and graphing feature, also it prevents spikes and overboosting and allows you to control and how fast it removes the overboost and holds the preset boost. I can also control the "gain" which is how fast or slow the wategate opens which really helps spool time.


Again, I think an EBC is a good investment and its more reliable and all around more superior to a MBC. I think the Blitz is by far the best EBC out there.

MikeJ-2009

Ok, we're getting there, but the bottom line is that the WG is still in ultimate control of how much boost there really is. So with the EBC, how does it send just the right amount of boost to the WG in order to control the boost at the desired boost level? Especially with not knowing the spring pressure of your factory WG? I understand how it can block the signal, but sending the signal to the WG to give you a desired boost level seems kinda complicated. Just confused on how it does that.

Reddy

with a boost controller you can't go lower than the wastegate spring pressure, the boost controller works off the precentage above that spring pressure. the boost controller just uses electronic solinoids to control the vaccumm pressure going to that wastegate

MikeJ-2009

I guess it's going to be one of those things I'll have to get and then figure out how it works by doodling with it. Thanks for the help

Chris Harris

It works by controlling how much boost the wastegate 'sees.' When you run a line straight from your intake manifold to the Wastegate (w/ 7 lbs spring), it 'sees' boost and begins to open as boost climbs to 7lbs. By the time it reaches 7 lbs, the wastegate is fully open. Actually, it has also let out some air prematurely because that's the physics of a spring.

An EBC lets the wastegate 'see' less boost when there real is more. It's like 'the Hack' fooling the ECU. However, it does it a little differently than changing the voltages.

It think there are two scenarios when using an EBC...Internal Wastegate and External wastegate.

External Wastegate - Hook up the standard boost line to the side nipple on the wastegate. Hook up another boost line to the EBC solenoid and then from the solenoid to the top of the WG. The solenoid then lets boost thru that pushes down on the top of the WG spring, keeping it closed. Based on how much you want to boost, say 10psi...the EBC will allow boost to push down on the spring, until you hit ten lbs (all the way until you hit 10lbs, no premature opening). Now, I think the limitation here is that you cant boost less than your spring, and you cant boost higher than twice your spring.

Internal Wastegate. I'm not sure if internal WG have two nipples like External...but if they dont you would have to run the solenoid in between your boost source and the WG nipple. Now iin this condition, like a MBC, the EBC will bleed off boost until a set pressure limit is accheived and then let the wastegate open up.

Not the best explanation, maybe not all correct...but hopefully that helps a lil.

MikeJ-2009

I was thinking about how it might work like I've heard, and this is the only way I think it could work.

The vac line is hooked to the ebc via the turbo and another to the intake manifold. Now depending on the amount of boost the EBC see's vs. what you are telling it you want, it would have to read boost in your intake manifold and make alot of +/- changes according to the pressures it puts on the wg to keep the desired boost level. I'm sure this is how it works, It's just really hard to explain.
I was more/less confused on how it regulates a boost pressure against a wg spring that is already set to a certain pressure and holding it steady. Say the EBC blocks boost to that 10psi desired pressure, then when it see's 10, it sends psi to the wastegate, but in order for the EBC to hold you at 10psi, it would have to send a signal to the wg, and then check back with the IM to make sure the pressure is being held. Then according to what it is seeing at the IM, it would have to +/- the pressure it sends to your wg in order to keep the charge steady.
Am I understanding this correctly?

Chris Harris

Yep, and I believe that some of EBCs even have their own pressure sensor in them as well. THis is how they 'know' what PSI they are at and what to regulate.

willahlborn

Here's a simpler explanation: the EBC solonoid intercepts the vacuum line between your compressor housing and your wastegate. It stays shut until the EBC detects that the boost has reached the desired level (i.e., 15 psi or whatever). It then opens just enough to keep the boost level at the desired setting. It does this by monitoring boost level the entire time.

i've been pricing out EBCs and I can't wait to get one...