What fuel eccomony should a 1800cc Legacy wagon get?

[Old Skool Subbie]

What fuel eccomony should a 1800cc Legacy wagon get?

Its a 1990 5speed gearbox with Part time 4WD.

Its a SPFI EJ18

JDM Import.

I always leave it in Front Wheel Drive.

Ive only just got 27MPG so far.

I was hoping it would get better fuel eccomony than that.

Thanks

[Guest]

It's got a 50L tank AFAIK.

At a guess it Should get about 390k's around town...

I'd say around 550k on the open road.

[dubbedup]

i would have expected a bit more than that.....

[nt_a_foz]

In my experiance non turbo subis are as thirsty as turbois..

my 1500cc impreza used to get around 450-500km out of a tank which is achievable in a turbo if you drive nice

[Joker]

oh and FWD if you are talking about the fuse in the engine bay aint good for it

[Guest]

 JoKer said:

oh and FWD if you are talking about the fuse in the engine bay aint good for it

That only applies for Auto's.. i'm guessing he has the dual range / pushbutton 4WD gearbox that was in the early AU/NZDM models... as it's a 5MT

Correct James?

[Joker]

yea I twigged on that after I posted it

[Old Skool Subbie]

 nt_a_foz said:

In my experiance non turbo subis are as thirsty as turbois..

my 1500cc impreza used to get around 450-500km out of a tank which is achievable in a turbo if you drive nice

Dad got about 45mpg driving from chch to dunedin and back driving his 1994 1500 Front Wheel Drive Auto Impreza

[Old Skool Subbie]

 Hopai']

[quote name='JoKer said:

oh and FWD if you are talking about the fuse in the engine bay aint good for it

/quote]

That only applies for Auto's.. i'm guessing he has the dual range / pushbutton 4WD gearbox that was in the early AU/NZDM models... as it's a 5MT

Correct James?

Its just the pushbutton 4WD gearbox and its JDM

[Old Skool Subbie]

Could not using a airfilter reduce fuel eccomony?

[Guest keltik]

Not by a noticeable amount. I used to get 550km out of a tank in my FWD EJ18 legacy. The 1500 that the impreza gets is MUCH more advanced than the motor you have so id expect it to get better gas milage.

I think my average was 32mpg in my sedan. I get 28mpg from my 3liter but thats what 10 years of engineering gets you.

[Guest boostin]

 Old Skool Subbie']

[quote name='nt_a_foz said:

In my experiance non turbo subis are as thirsty as turbois..

my 1500cc impreza used to get around 450-500km out of a tank which is achievable in a turbo if you drive nice

/quote]

Dad got about 45mpg driving from chch to dunedin and back driving his 1994 1500 Front Wheel Drive Auto Impreza

Whats that in the newfangled metric system??

I got 640km to a tank out of my manual 2.2 4WD Legacy once. 500km was pretty easy to get.

[ReubenH]

Short answer, sh!t economy, and no power to boot. EJ18's are a BAD idea - Gutless and thristy.

Do an EJ22 conversion au!

[dumbskate]

Yeah the little 1.8 engine is still having to shift the same curb weight as the 2ltr model so it would have to work harder to get the same job done.

[Guest keltik]

Another big factor is that it looks like youve got the SPFI model james. I cant say for sure but im thinking its fuel management isnt as good as the MPFI EJ18

[Old Skool Subbie]

 ReubenH said:

Short answer, sh!t economy, and no power to boot. EJ18's are a BAD idea - Gutless and thristy.

Do an EJ22 conversion au!

Down low theres no power but tell you what once the Revs are up it really suprises me. Its like a completely different car lol.

Maybe I will sell it and pick up a EJ22 engined legacy. Cant be bothered converting it to a EJ22.

[Old Skool Subbie]

 keltik said:

Another big factor is that it looks like youve got the SPFI model james. I cant say for sure but im thinking its fuel management isnt as good as the MPFI EJ18

No AFMs to worry about... as far as I can tell.. I cant see one lol

[ReubenH]

Their engine bays are generally a bit easier to fathom, and they have the red injectors too (biggest before the turbo grey injectors) I've seen 22's last past 400,000K.

The economy isn't fantastic though, i drove my old car like you should drive a subie, and it got 10L/100K. Suppose that's resonable actually.

[Guest keltik]

Hey Reuben, he has the SPFI version. One dirty great injector at the throttle body and no AFM (Oh i see, your referring to the EJ22)

Pick up a EJ22 motor, stick a escort distributor on it (or a EJ18 one if you can find it) and then slam a couple Webers on it using a EJ dual carb manifold

[Old Skool Subbie]

 keltik said:

Hey Reuben, he has the SPFI version. One dirty great injector at the throttle body and no AFM (Oh i see, your referring to the EJ22)

Pick up a EJ22 motor, stick a escort distributor on it (or a EJ18 one if you can find it) and then slam a couple Webers on it using a EJ dual carb manifold

That could be a go? how would you go about fitting a distributor to a EJ22? (Remember my legacy has the distributor)

How much hassel would be involved?

[Guest keltik]

Same as how its fitted to the motor you have now. From what i understand the heads are essentially the same.

[Old Skool Subbie]

 keltik said:

Same as how its fitted to the motor you have now. From what i understand the heads are essentially the same.

So basically fit the EJ18 heads to the EJ22 block?

Or would I have to use EJ22 and have the hole borded in the back of the head? to fit the distributor in.

[Guest keltik]

Yeah i meant you could just slam the distributor into the EJ22 head. Im not 100% certain but i think it has the hole there for the dizzy just blanked off. Its been a couple years since i read about it being done on a Leone Hatch.

[Guest boostin]

Yeah all those SOHC's have a cover over the dizzy hole, on the back of the RH head.

And from what I understand, if you do go EJ22, fit the EJ18 cams to it. Higher lift and longer duration so I've been told.

[ReubenH]

Yeah, the EJ18 long block will be essentially the same as the EJ22, just different displacements and internals (going off what i've seen between the DOHCs). the dizzy would go on fine, the leads are the same as your standard coil pack leads.

But i don't think the problem with the EJ18 leggy's lies with the displacement, it's the whole package. Honestly, the EJ18 will do you fine. it's gonna last forever and do the job. And it's the closest to any pre EJ an EJ can get

But if you really really really want better power and economy, go find something EJ20 or 22 powered from the gen 1's. Coil pack and multipoint injection ftw. Pro tip, the SOHC's are the simpler cheaper more reliable engines that last for 500,000K's and beyond