Subaru Enthusiasts Car Club of the Sierras - View Single Post

ScottyS · 2009-06-03, 03:53 PM

OK, made some big changes.

Installed:
JDM 440cc injectors out of the EJ20G that I bought (serviced by Witchhunter, fast turnaround with all new O-rings)
TD-04 (again)
mid-90's EJ22 N/A JECS MAF
ECU chip by Revtronix.com for above items

Results: so far, a mixed bag. Obviously, a tuned chip by mail order is not going to be exactly right, but the new parameters to utilize the higher-capacity MAF and 440's were necessary. It has two maps, one for 91 octane at 14psi, and one for 93 octane at 16 psi. So far I have gotten the same fuel mileage as the old 380cc's. However, I have had to revert to the MBC once again because the chip is designed for a 10psi wastegate (newer TD04's), and mine has the 6psi version. The ECU just could not get around that, and driveability was suffering. Things are much smoother with the MBC, but I miss the staged boost control of the computer-controlled solenoid. This may get addressed down the road, being one of the first users of a product has some disadvantages. Maybe I'll just track down a new actuator or something.

I also put on the 3" bellmouth downpipe that I've had sitting around since I bought the donor car - it turned out to mate to the catback just fine with a 3" gasket I had on the shelf. That changed a LOT in terms of exhaust note. The car sounds pretty awesome right now.

So right now I don't know if the car is any faster than it used to be, but at least the injector and MAF capacity are raised up, and the top-end of the TD-04 is more responsive than before after 5000rpm. I'm waiting for the ECU to smooth things out after a few days of driving before making a final assessment.
Probably I'll have everything figured out tuning-wise about the time this motor goes....lol.

2009-06-03, 03:53 PM	#98
ScottyS EJ205 Real Name: It is real! Join Date: Jul 2004 Location: RNO Posts: 2,367 Car: 1998 Impreza Wagon, 1991 Legacy Turbo Sedan, 2003 Nissan Xterra Class: tvFree Yes, I'll fix it for you. Again.	OK, made some big changes. Installed: JDM 440cc injectors out of the EJ20G that I bought (serviced by Witchhunter, fast turnaround with all new O-rings) TD-04 (again) mid-90's EJ22 N/A JECS MAF ECU chip by Revtronix.com for above items Results: so far, a mixed bag. Obviously, a tuned chip by mail order is not going to be exactly right, but the new parameters to utilize the higher-capacity MAF and 440's were necessary. It has two maps, one for 91 octane at 14psi, and one for 93 octane at 16 psi. So far I have gotten the same fuel mileage as the old 380cc's. However, I have had to revert to the MBC once again because the chip is designed for a 10psi wastegate (newer TD04's), and mine has the 6psi version. The ECU just could not get around that, and driveability was suffering. Things are much smoother with the MBC, but I miss the staged boost control of the computer-controlled solenoid. This may get addressed down the road, being one of the first users of a product has some disadvantages. Maybe I'll just track down a new actuator or something. I also put on the 3" bellmouth downpipe that I've had sitting around since I bought the donor car - it turned out to mate to the catback just fine with a 3" gasket I had on the shelf. That changed a LOT in terms of exhaust note. The car sounds pretty awesome right now. So right now I don't know if the car is any faster than it used to be, but at least the injector and MAF capacity are raised up, and the top-end of the TD-04 is more responsive than before after 5000rpm. I'm waiting for the ECU to smooth things out after a few days of driving before making a final assessment. Probably I'll have everything figured out tuning-wise about the time this motor goes....lol. __________________ "Trend Number One is that people aren't getting any smarter." Dogbert Last edited by ScottyS; 2009-06-04 at 10:05 AM.