About the time I got a job where I sit in front of a computer all day.

exactly, and i posted whats wrong with boost controllers, didn't i imply there was a downside?
i asked because i didn't know like any other question. all i wanted to know was what causes the ill effects on the subarus just out of curosity. if i wanted to put one on i would have.

how is the impreza more sophisticated than the neon? why would i put a boost controller on if it's bad for the car?

Well then I guess there's nothing to say... the real problem w/ MBCs is that they run the car lean. Anything that makes the car susceptible to detonation (overboost, lower effective octane, inadequate fuel, high temperatures) is a recipe for needing a new motor.

cool thanks, now i understand.

I told you to be specific, see what happens.;)

You are an engineer, you know what a terrible argument that is. Engineers are paid to make something extremely reliable and as cheap as is practical in addition to a bunch of other considerations. Their job is hardly to optimize performance. MBCs still suck though.

Normally I'd agree w/ you. But in the case of the MBC discussion... the problem w/ MBC's is the terrible history of reliability and consistency. The factory boost control feedback loop is explicitly engineered for reliable boost (since Subaru certainly doesn't want to deal w/ motors blowing up left and right due to overboosting).

Granted, the factory software isn't tuned for performance, but the hardware is certainly very capable at controlling boost reliably. Since we have readily available remapping tools for the ECU, using risky cheap-o hardware to get less performance than the OEM bits can handle is an ass-backwards method of tuning.

Also, as a software engineer (specifically one that's doing a shit load of communications stuff), optimizing performance is easily 50% of what I do. (The other 50% is just getting other people's crappy-ass protocols to work at all... :mad: 'cause I'm still at work as I type this...)

Before we had engine management, it seems MBC's would cause mid-throttle/full boost elevated EGT's. On race day, people were known to use MBC's to up the boost since, it was said, they weren't as bad for the motor at WOT. But even at full throttle, many a MBC would hold full boost to redline, pushing the turbo dangerously outside it's efficiency range. Grown men cried.

Today we have much more betterer MBC's available (like the Hallman Pro RX that I run) and engine management. :cool:

And you don't necessarily need to be tuned for the MBC but you do need to be tuned. I wouldn't have run one if my tuner hadn't recommended it. And having an EGT gauge makes me much more comfortable running it too.

Anybody who doubts the benefits didn't drive my car before and after. The car feels much torquier and boost response is night and day. Honestly, AutoX is where it really shines. 1st and 2nd gears build boost faster with the MBC.

As for the danger of removing the ECU's boost control, thankfully, the ECU can still cut power when you reach a boost threshold that your tuner can set.

AWD Launch, read Ed's (EQ Tuning) posts in this thread. Good info right thar.

well if people would just read and not assume, everything would be cool.

well, implying, based on what was left unsaid, is one of the funnest things we get to do all day (on the internet) -- but anyway, welcome to the board....:)

yeah but most of the time it becomes flaming.

That doesn't happen here. Not real flaming anyway.


Well... not usually *cough*lakemonster*cough* Oh sorry I have a tickle in mah throat.

I've never been flamed.

You especially have never been flamed.

:lol: