This is very tempting.
Buy the Ebay Masterpower turbo, use the Ebay manifold and wastegate, and use the money I've saved v/s the GT4088r turbo and go with the MS standalone. (Once they have the CPS possible software upgrades, or daughter board etc.)
No more AFM, the ability to tune based on AF ratios, raise the rpm limits to where I determine they should be for this motor/turbo and fuel setup, and in the future, if I add more injectors, or swap out larger ones than the 550's I have now, it should be no huge deal to re-tune for more fuel.
If the high/low pressure switch on the supra is a simple relay cut for the compressor clutch relay, then wiring up the AC on this standalone is no problem. (Just need to up the idle speed slightly when the AC is on. Does the MSII allow for that if your using the ISC? I would think all you need to do is increase the stepper motor pulse count to get the idle speed you want with AC on or off. )
So, no boost control with the MSII. I should read everything about it, but have not had the time. How many "extra" input/output connections are left over when you've wired it up for the Supra? (Don't most of these stand alone computers have a few analog connections so you can wire up sensors to turn things on or off depending on sensor data? That is what I was wondering about the AC. If we needed to wire up the pressure limit switch to kill the AC if it was too high or low etc.) But these same connections could be used to turn on methanol injection for example. Or turn on cooling fans at certain coolant temps and just about anything else you could want if there is a signal and controller involved.
Does this standalone look at, or monitor knock sensor data? Can you adjust your timing advance based on knock? If so, it would be nice to let it float a more agressive timing advance and pull timing as needed to control detonation, especially if it's scaled to the amount of knock. (IE, very little knock, and less timing advance is pulled, v/s lots of knock and it pulls more timing accordingly keeping the engine alive with any fuel you might be running at the moment. There are many times I've not been able to run Toulene while traveling, and the fuel quality sucks, so I can't run as much boost. I don't want to have to retune the computer everytime I'm out of town. It should be as simple as turning down the boost level, but that only solves part of the problem, especially if your boost tends to spike even when turned down. These little spikes are no problem on good gas, but could prove to be a disaster when running 91 octane crap gas. The methanol injection will help here, but I don't have that system in place yet.
Too many mods to do, and no time and/or budget to complete them.
