So I just turned over 2000 miles with the turbo installed, so I figured I'd give you all a brief update.
The tuning is 95% complete at this point, and the car is making great power (260whp on a mustang @ 7psi). There is one issue remaining, which i'll detail in a minute. The guys at the shop are continuing to make improvements to the kit as we learn, and one of those will be a new charge pipe with relocated MAF going on next week, that should improve the stability of the MAF input. The initial design put the sensor a bit too close to the diameter change. Once this is on... we'll move on to solving the last bugging tuning issue:
Stalling. This car is driving me nuts for this reason alone. It's extremely weird behavior. Here's my best description:
- You know how when you cold start your car it idles kinda high for a few seconds than settles down? well, mine runs super rich and has to maintain super high load to keep idling, and even the rpms dip to ~500rpm.
- immediately after it settles down, the car will hunt up and down a couple hundred rpms for about 30 seconds to a minute, then settle into a perfect idle and run great.
- now the weird part: if you drive away (or even give it any throttle) before the hunting bit is complete, the car will stall repeatedly when you come to a stop and run like crap until you key it off/on and start the process over. if you wait until the hunting is complete (a minute or so after starting the car initially), everything runs perfect and the car never stalls. it's a beast.
I've been pouring over logs for weeks trying to figure out what the switch is that is causing this distinct change in behavior. I have a number of theories, probably none of which are 100% correct. But it's very clear: if you pull away to soon, it stalls and runs like poo. if you don't, it doesn't. Any ideas?
Beyond that everything is great. The kit is holding up great. No cracks, leaks, etc. I've recently added a Motiv overpipe and will be turning up the boost once the MAF pipe upgrade is finished. I can't wait!
