vicious_fishes wrote:just read the entire thread. let me see if i can summarise:
the injectors are some weird long things which have collar-seals. OP fabbed up some madness with pvc pipe, but apparently longer injectors DO exist on the market? was pvc pipe the only way to do it or could something else be done? e.g go ghetto as and theoretically, run a lap/collar of silicone around them once they're installed? i still couldn't work out how the OP got the short injectors to play nice? could you just lower the fuel rails by 8mm?
MAP sensor needs to be changed for boost, i take it to one that can read higher?
couldn't quite understand why the ECU couldn't be reflashed initially?
The OEM injectors used on this engine are not only longer, but have a the lip at the base to seal the air ports on the head. No one makes an injector for this engine that is larger than 285cc. No one rebuilds or resizes the OEM type injectors for high volume fuel delivery. So, in order to maintain usage of the factory plugs, I used WRX 410cc injectors the first year. I've recently updated to 650ccc injectors to give it more fuel. Also, no one makes a 3 injector rail, go figure, so I had to make a rail that would work. I cut the legs, rewelded the legs in the position that allowed for proper fit, trimmed the pvc pipe to make up for the missing seal lip and added shims to make sure the seals at the base of the injector sealed tight against the head. Without the seals at the base of the injector or a tight seal, vacuum leak. Actually, I would install the injectors, smoke the intake, make adjustments, smoke it again, more adjustments in repetition until I got it sized and sealed.
Its running the WRX 3 BAR now and is working, but the scaling for the MAP is off or the computers are confused, I've used two ECM with identical results. We've figured out that somewhere in the ECM RAM there is another scaler for the MAP and the ROM scaler is conflicting with it. The data reported is backward concerning absolute and relative. It shows 8 & -6 instead of 6 & -8. Its running and calculating fuel according to the MAP voltage, but the reported data is wrong. When the computer sees 7 psi boost, its actually 9-9.5.
The ECM can be reflashed all day long prior. The issue was retuning the ROM outside the parameters of Subaru engineering. Meaning, no tuner would touch it because there were NO DEFINITIONS available to tune the car. Until Ed (XRT) took it on. And we didn't think of a 3 BAR sensor and rescaling because we didn't have the definitions to manipulate it until Ed (FPT) got help from a couple Rom Raider forum members.
The proper definitions are still being worked on. dshultz with RR is breaking down the RAM. Working with the programming on this car is like working with WRX/STI programming when first started. Its new territory, but this system is baffling the hackers with the missing links and the 3D fuel map that constantly switches how it manages the fuel. Its not just based on the MAP voltages, other factors are interfering.
More information on the complete build is here:
Sleeper VDC