Time for a small update. So far so good, have the new AIC PI maps pretty dialed in, car is running great and the clutch should be nice and broken in now. The motiv twin disc started out incredibly harsh but has gotten much better. It's still unpredictable in first gear if you're trying to drive nicely, but if you drive somewhat aggressively it's great. No power holding issues to around 28psi so far. My tires on the other hand disagree with the build but that's for another day.
So I got a new upgrade in the mail today worth sharing- an AEM TMAP sensor to run the PI from.
@chrisdfv makes a great PnP harness for the sensor which threads into any aftermarket intake manifold and comes with adapters for factory plastic one as well. The reason for this should be pretty well known by this point but I'll elaborate some; if you are running PI off the normal TMAP sensor you're running your reference off pre- throttle boost. This isn't a great idea for two major reasons:
1) In overboost situations the throttle partially closes, so pre throttle will see more boost than manifold, causing more PI to inject
2) During shifts (6mt and occasionally 6at to lesser extent) when you lift, the throttle closes, in that short time before the bov opens you have a boost spike pre throttle yet vacuum in the manifold, so you bolus a nice bit of fuel that isn't supposed to be there.
Ultimately, this can lead to backfires and damage to things. Say you have a misfire (which can be caused by this) and a cylinder shuts off. You have excess fuel, and now fresh air in that cylinder. If you have enough overlap you can get some egr (or reversion, whatever) and ignition of that mix in the manifold. It's a nice way to grenade the plastic manifold and on the metal ones who knows what. Granted this is most common with NLS but has happened without it as well and has happened to 6at cars too. Moving the reference to the manifold helps address this with PI.
Chris
@chrisdfv made this PnP for me and it's perfect. I may even play with using this sensor for the MAP (no temp sensing in it) and see how the car does too. If anybody running this sensor needs the AIC map adjusted I can share the changes no problem.
He asked me to be brutal on the review so I did find one thing, he didn't start the stripping of the one wire you need to strip. So I couldn't just pull the plastic shroud off the wire. It added about 10 whole seconds to the install
Should be hitting the dyno soon after I get back from vacation at Midnite Tuning who I've been working with locally. See ya'll in the new year!