Injector Question

[SubyFusion]

So I swapped out my bad EJ22 for an EJ20 and i used the EJ22 manifold with the injectors, Is there a difference in size of injectors between the two engines? I'm thinking this may be why my gas mileages is kinda poor! can any one verify?

Thanks, Brian

[BSOD2600]

I thought the stock EJ20 injectors were 440cc while the EJ22 is 370cc. If so and you're still using the EJ22 ecu, it's going to take a LONG time for it to learn and compensate.

[SubyFusion]

Why would the Injectors be bigger on A smaller engine? that confuses me! I am still using the stock ecu.

[Legacy777]

The EJ20 ran higher boost, and therefore needed bigger injectors.

If you're using the EJ22t ECU, then you should use the EJ22t injectors as well.

[SubyFusion]

Its An N/A EJ20

[Legacy777]

Ok, that info does help. The injectors BSOD2600 mention are for the turbo motor.

The injectors for the non-turbo should be similar if not the same as for the non-turbo ej22

[SubyFusion]

lol Sorry about the confusion I wish I had a turbo EJ20! so the ecu would make much difference then either?

[Legacy777]

There may be a little difference, but I can't see if to be huge. There's a slight difference between the 90-91 MY's and the 92-94's, and all that it does is cause the motor to run a little rich in open loop.

[SubyFusion]

Do you think because my engine was made for an impreza and those are lighter then the legacy its hard on the motor and under powered so I am getting lower mpg then i should?

[kimokalihi]

What mpg are you getting? I got 25.5 on my best tank with an EJ20G swap, TD05, 520CC injectors and modded EJ20G ECU. That was mainly cruising with a few pulls. The last tank I got 19.6 MPG and that was with a LOT of fast driving and I think at one point I got up to 135mph.

[SubyFusion]

Hahaha 19 is about what my brother gets in his 08 WRX, so thats not to bad considering he drives hard! I think my mpg is about 27 but still thats low for an n/a with a smaller then stock engine!

[ericem]

That is pretty good IMO.

[kimokalihi]

I got 27 in my 90 L NA AWD 4EAT wagon.

[Legacy777]

That's pretty good mileage if you ask me.