I was wondering how many people are using the EMS to control boost...
I've heard that boost control solenoids are prone to failure and was wondering how many people don't follow that route for that reason. Any truth to that?

Is there any way to make redundant boost control solenoids in case one fails?

 

EBC? No option on ur list.

 

If you are woried about overboost..just setup the boost fuel cut in the software. Also, if you have an internal WG, you can configure the soelnoid so that if it loses power it will fail to min boost.

 

I didn't include it because I didn't think that anybody that has an EMS would go with a separate EBC versus setting it up through the EMS... Is there an advantage to that?

 

I heard that even if you setup the boost fuel cut there could still be damage if it doesn't react fast enough. Also, the solenoid can fail in such a way that even if it's set up to go to min boost it might not do that. Any truth to those?

 

Give the boost cut a shot, and see how quickly it reacts. Its almost instantenous, and very obvious. Its VERY fast.

The solenoid could fail open, or closed, for sure. But I wouldn't be concerned about that because the boost cut is there. That combined with prudent mapping in higher-than-safe boost regions (max fuel, min timing) and its not going to cause any problems on an overboost.

If you are really worried just buy a high quality solenoid like the AEM/APEXi solenoid. The GReddy Profec B Spec II solenoid also works FYI. I have never had the GM solenoid fail on any cars I have setup to date though.

 

I have the GM boost solenoid almost a year now. No boosting problems. Couldn't u just plumb mbc before the solenoid to limit overboosting?

also a tune that isn't too aggressive with safety precautious won't cause any problems.

 

Interesting... is this really possible?

 

I just noticed that AMS' "World Record Holder Quickest & Fastest Evo8 9.41 Best 1/4 mile" has an AEM EMS but the boost is controlled by a GReddy Profec B Spec II....
http://www.automotosports.com/evo8_specs.asp

Does anybody know what advantage there is to this setup? Why would you do this vs having the EMS control the boost?

LOL ExViTermini maybe I should add that option to the poll after all?

 

I am using that same set up. I had the controller before when I was running the utech. Its an advantage for me because I dont run a lap top in my car. I just have my car tuned with slight conservative numbers in case I do get a spike in boost. I am also not very tuner savy, I let my tuner handle all the that. I like it because I can run different boost levels or gain with very easy access at my finger tips. Its nice to be at a stop light, or just jump in your car and make an adjustment without plugging in a lap top. My tuner adjusted my ems to automatically make compensations at whatever boost level I run (i hope that makes sense). So I can adjust boost or gain on the fly.

Not important, but it also adds a little nice internal bling to the inside of your car if you like that stuff.

 

Interesting...

One drawback I've noticed to the Hallmann MBC is that when you do WOT at a high speed in 5th gear (over 120mph) the boost spikes to 1.8bar... it's made me sh|t bricks on the autobahn quite a few times.

 

I personally use the GM boost solenoid and it works perfect . The AEM automatically raises boost from 23 psi to 27 when i turn on my alky kit. If i turn it off my boost goes back down to 23 psi for pump gas driving.

 

I had a GM Solenoid on my WRX, now I have a Prodrive Solenoid holding 19psi strong (stock is 13.5psi).

Im not too familiar w/ Evo EM but for the WRX if you use EM they replace the need for a MBC or EBC and control boost. Also, if something bad happens normally the ECU can pull timing and reduce boost to prevent detenation. With a BC the ECU runs full boost no matter what and that is bad.

 

So you controlling the boost with the EMS, you replaced the stock EBC with a GM one? Can you use the stock one with the EMS?

 

i'm controlling boost with GM, but i'm going to install a MBC 'cause it's a pain in the *** to manipulate booost through the ems