LiL BenNy

For those who are running FI what accessories are you using

EX
What boost controller, wideband, BOV, etc?

basically whats your setup!

mysql101

just look around at people's sigs

rkostolni

I really like the Apexi AVC-R boost controller over the Profec. It provides a capability to set different boost levels for each gear.

rkostolni

It calculates it from the vehicle speed and engine rpm.

You would have to physically detach the actuator from the wastegate to run with no boost. Even then, you'd probably still make a couple pounds under WOT.

MadDog

I can vouch for that. With my actuator tied open I still made a little boost at less than WOT. The PCM and MAF seem capable of handling it, though. It never went lean even when I was at about 1.5-2lbs.

rotorocks

Have you tried to go above that?
Maybe with some minor fooling we then could just use the PCM?
I didn't think you can actually run in boost at all, as the PCM is uncapable to compensate above 0.

MadDog

ummm... no. I didn't try any WOT runs just to test the ability of the PCM to handle boost. But, back when we were first looking at this stuff, I seem to remember deducing that the stock MAF has enough headroom to handle a few pounds, maybe 3-4, safely.

As for the statement that the PCM can't handle boost, the PCM doesn't know or care what the intake pressure is. All it cares about is the mass flow rate. For example up here in the high desert, the ambient pressure is about 11.7 psi. When a N/A car goes WOT, the intake pressure is 0 psig or 11.7 psia. Take the same car to sea level and go WOT and you now have +3psi in the intake relative to this altitude. My point is that the mass flow rate at sea level is equivalent to running a little boost here at 6,000ft. The PCM can handle some boost just fine - with the caveat that amount of boost (measured in gauge pressure) it can handle is altitude dependent.

rotorocks

I know all that It's not the boost but the volume...
I just didn't want to get way too much into phrasing it all correctly. I knew once I post it, you'll take care of everything for me. He he he

No I didn't mean WOT pulls, but some part throttle runs with higher boost. (at what point does it begin to go lean) If I could only get my hands on the source code for the PCM...

rkostolni

Hopefully this is already obvous, but even though it has enough headroom to handle a few pounds of boost, its going to be way too lean. It will shoot for NA type AFR's in the high 12's at best. I wouldn't suggest trying to see how far you could push it. I suspect it would ping with anything more then a couple pounds.