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Old 08-03-2004, 09:44 AM   #1
JonofScio
Scooby Newbie
 
Member#: 53595
Join Date: Jan 2004
Chapter/Region: NWIC
Location: nowehres
Vehicle:
1987 GL Hatch
EA81 1.6L + Weber

Default would these items allow me to use my n/a ecu for a turbo application?

trying to figure out a somewhat inexpensive route to take for turboing a car.

there's the JDM front cut, there's the usdm front cut, and both involve of course swapping ecus.

well, what if your current engine is what you want to turbo? like an EJ18, or what have you (in my case, an EJ22E) Well, would these items allow me to use my stock ecu without going through the trouble of swapping an EJ22T ecu in?

1. Apex'i Super AFC (or SAFCII)
2. Bigger injectors (of course... STi or EJ22T)
3. Bigger fuel pump
4. Fuel cut remover

would this cover it? I mean, all of the issues are there... bigger injectors, fuel management, a way to remove fuel cut, a bigger volume pump, ect.

thanks to any who reply
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Old 08-03-2004, 05:51 PM   #2
wrx plus
Scooby Specialist
 
Member#: 42253
Join Date: Aug 2003
Location: Hampton, Va.
Vehicle:
2003 RWD WRX
Alcohol injected, WRB

Default

Fuel pressure regulator on a 1:1 boost verses fuel pressure.
MSD products for fuel and spark.
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Old 08-04-2004, 08:21 AM   #3
ChicksDigWagons
Scooby Specialist
 
Member#: 20508
Join Date: Jun 2002
Chapter/Region: MWSOC
Location: Ishpeming, MI
Vehicle:
1998 Red Wagon
New Turbo Project...

Default

It all depends on how much crap you are willing to put up with, and how your particular car handles boost.

I'm setup as follows currently:

97 2.2L Impreza OBS
Stock injectors
Stock WRX turbo/intercooler
Walbro 255l/hr standard pressure pump
stock regulator
Apexi S-AFC

I'm using very little correction on the AFC, and more for peace of mind than anything else. Also I'm only running ~6psi peak boost. The stock MAF ECU scales well to the additional airflow and as far as I can tell my NB O2 readings and EGT are acceptable. I also have had the turbo on for probably 10k of hard miles. I'm currently at 130k total.

I've never hit fuel cut do to boost running as high as 12psi on Legacy Turbo injectors. So naturally I've never bothered dealing with that issue. Concerning the Legacy Turbo injectors the only problem I have is the decrease in fuel economy. In vacuum, during cruising conditions the AFC just can't pull enough fuel, plus my timing was adversely effected as well. However the overall drivability was fine. At 10psi I felt the turbo was pretty well running out of steam at redline though.

All in all the EJ22 is a very durable platform. I know the early OBD2 2.2 ECUs handle boost exceptionally, don't know about the OBD1 but not having a pesky CEL for eliminating cats is reason enough to rejoice.

If you don't mind risks like me, I think its totally possible to get away with running 4-5psi on a stock fuel system and expect it to survive. Others will probably lynch me for that statement, but the EJ25 has set in peoples minds that N/A Subaru motors spontaniously blow up on boost. In my experience with the EJ22, this just isn't the case. There are a number of people who use and abuse boosted EJ22s with less than magnificant engine management and they survive.

But every time I get into boost I expect the worst. I mean geez, at 130k who wouldn't?
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