legacycentral bbs

Ok, so I am running a 2.0L block with 2.2t heads, and a factory Legacy turbo. I was going to run a piggy back, or stand alone, but I was thinking about trying to keep it stock as I might go on lots of long trips in state here in a bit.

Running stock boost, no higher, with a WRX intercooler, is it possible to run the stock 2.2 N/A ecu?

And can I run turbo legacy injectors on an n/a ecu? Or will it freak out?

I heard guys are running stock STi injectors on their WRX's with a stock ecu, but they are newer and more advanced I'd guess.

I need to get this engine in soon is the biggest issue. I would say it'll run fine unless the MAF doesn't like it....

Can I get by for a month or two running the stock ECU with my setup?

Thanks, your help is greatly needed!

Rick

Legwerx wrote:Running stock boost, no higher, with a WRX intercooler, is it possible to run the stock 2.2 N/A ecu?

Without some additional form of fuel enrichment, I wouldn't recommend it.

Legwerx wrote:And can I run turbo legacy injectors on an n/a ecu? Or will it freak out?

I don't know if it'll freak out, but it will run like poop when idling & off-boost...if it will even run.

Legwerx wrote:Can I get by for a month or two running the stock ECU with my setup?

Not without some additional fuel control. With low boost, you should be able to get by with the n/a timing configuration, but not the fuel config.

Will a 5th injector be enough? Find out when it goes lean, and rig up an injector on a pressure switch?

And does the 2.2L use more fuel then a 2.0? I was told it would run rich and crappy if I just n/a swapped the 2.0 for the 2.2 by a shop in town.

Thanks

A fifth injector might work. It'd be pretty crude tuning.

You'd need a wide band O2 sensor to try and get the opening of the 5th injector timed right.....as I said....that's just a very crude method to do what you want.

You can essentually do the same thing with a 2:1 rising rate fuel pressure regulator, or something similar. That way you'll be flowing more fuel through the stock injectors when boost is coming on. That'd be a lot easier then trying to do a 5th injector.....it's still pretty crude though.

Are you talking about n/a or turbo?

For the n/a motors, the 2.2 & 2.0 liter motors should have the same or nearly the same injectors.

For the turbo motors....the 2.0 liter motors have larger injectors then the 2.2, mainly because they were setup for higher boost levels from the factory then the 2.2 motors.

I'm talking about actual fuel consumption of the 2.0 to the 2.2 N/A engines....Cause if the 2.2 takes more fuel to run then the 2.0L I'll run rich with the 2.0 block controlled by the 2.2 ECU.

Sounds like a RRFPR is the way to go at least for now anyway....

Do I need a bigger fuel pump?

Thanks so much!

Rick

The 2.2 will probably take a little more.....but if you're using the 2.2 ECU, then you might as well use the 2.2 block.

You may need a bigger fuel pump....I can't say for sure. It'd probably be a good idea.

Well, I was having some trouble finding a 2.2T block, and ran into a JDM 2.0. Not sure if it's a turbo 2.0, but the water pump is a turbo pump......

I got if for a great deal so I am going with that.

I hooked up a A/F gauge, and I am just going to pump it up with 91 octane, and swap the engine out and see what it needs from there.

I think it'll be fine cause it's running rich as it is....

Ok, Im running a t3 setup on an ej22 open deck with turbo pistons and ej25 heads.

Im running sti 550 injectors, wrx tmic, etc.

You will NEED to pull fuel with any injectors other than stock.

If you want to do it super cheap (and always worry about blowing your motor) you can do what I did and get an Apexi SAFC II. I always worry about blowing my motor and its annoying.

If you want to do it right, but semi cheap - try an emanage ultimate. With the injector size you want to run, you could probably get away with an emanage blue, but its a compromise and not worth it imho.

If you want to be REALLY safe and have money to spend - go autronic with plug and play, and get the thing tuned properly....

An a/f gauge tells you NOTHING - it is a complete and total useless piece of junk....

Get a wideband and dont look back...

Well, I know it basically tells me nothing, but it's better then nothing.

The reason I think it'll be ok on stock management is that I live in colorado (the mile high state) and we can get away with running stuff that you can't below sea level. I'll just see what happens with the stock 2.2 N/A ecu, and go from there.

Actually, having nothing is better than running an a/f gauge - you still have money in your pocket...

2 things to consider running a turbo on an n/a ecu...

Fuel and timing...

You need to take 20 degrees out of the entire rpm range (what I was told by a well respected local mspt tuner).

On top of that, you NEED to add/cut fuel at certain rpm/load levels. I doubt your car will idle without pulling fuel if you are using larger injectors....

Well, it's 100% fine stock ecu and all. Runs rich, no ping with 901 octane.

Thanks guys