172 replies to this topic

[Soop]

I realise this mate. My main point, was that I can't see the extractors adding 5kw's no matter what else you do. But the cost of doing these things makes them unobtainable to most, and not worth it to the rest. One thing i do know for a fact, is that Subaru NA's runs f*ck off Rich AFR's with the stock tune. They run around 14.7:1 at 2500rpm, then by 4000rpm they've hit 11.0:1, then down to around 10.0:1 by redline. I'm going to have a more detailed fiddle with the fuel system and I'll let you know what happens. Before all you d!cks start on about "ZOMG you'll blow up teh NJUN!" I'm not a moron. I know what the engine needs in order to survive. So shuddup and I'll let you know if it does anything at all worth while.

[Blaeven]

I'll let you know if it does anything at all worth while.

*subscribes*

[Scuba-Roo]

What about DOHC heads for us SOHC boiz Not sure how it would work with the a SOHC ECU, or is there even a difference? I dont know much about the ECU and what it fully does etc but my idea of it is it controls how much fuel, when the ignite the plugs, based on sensor readings it gets, their can't be that much difference between the sensors on say an ej25DOHC then an ej20/22SOHC can there?

[Soop]

You can't just bolt on the DOHC heads.
The piston crown shape is different.

SOHC Piston:


DOHC Piston:


If you did try and use DOHC heads on the Ej22, you'd end up with shorter valves....

For the effort involved your better off just putting an EJ25D in. There is a small amount that needs to be changed but its fairly straight forward.
With naturally aspirated engines, size does matter. The more CC's it has the more torque and top end power it will generate.
Its why 5ltr commodores can make 250kw@w standing on their heads.

As for the sensors and such.
The engine wiring is more or less identical for Gen2 GX and RX. The ECU pin differs between the 2.5 and 2.2 ECU's. This is easily over come by using a patch loom. Which either Al at AMAUTO or Mick at Teckworkz can make for you.

[Scuba-Roo]

Makes sence

[jak4cars]

EJ22's are fast stock anyway well at least i think so and its got torque too and i know this cause when i put 4 extra people it doesn't really slow down like other cars i use to drive. i wonder what your views would be to tuning an N/A if subaru never made turbo versions. i know people here would still opt for custom turbo jobs but imagine the support for N/A's. it would have the same type of support as type r's or certain corolla's or SR20's. Anyways i won't defend the N/A much more untill i make a decision after driving a ej20t or tt and thats if i ever do. what do you guys think of making vids of 0-100 of N/A's and turbos?? if i get any responses i'll make one too

[SUBARU]

If Subaru never made a turbo, you would probably find the same amount of support that there currently is for the NA models. There has been an instance of one person putting a turbo on an EJ25, but it was full of problems and ended up blowing up. Raptor make a supercharger setup for the EJ25 too, but it will cost about the same as doing a turbo conversion The point of this thread is indicate that there is only so much you can do to an NA before it becomes a cost versus gain scenario. The EJ22 isn't slow as such, but not quick either compared to the turbo varients. To post up a comparitive 0-100 video would be fruitless. You'd probably expect that a nicely (and sesnibly) modded EJ22 could do 0-100 in 8 or 9 seconds, an EJ25 in around 7 or 8 seconds and the turbos faster again.

[Soop]

Jesus H Christ... They aren't fast by any stretch of the imagination. The have a bit more torque <3000rpm than your average 4cylinder. But nothing to write home about. It's really quiet simple. NA (4cyl) Subaru's are not, nor will they ever be, a performance vehicle. If you want a quick NA on a budget. Go get yourself a VH - VK - VL Commodore with a nice 308 in it. It will scare the f*ck out of you. If you think this POS EJ22 is fast.

[jak4cars]

well when you've been driving 1.8l's, 2.0l's most of your life bein a p plater the ej22 is fast for me and i hardly have to press the throttle for me to keep up with traffic. i have driven fast more powerful cars of the 2.0l's and commo's but its pretty good well thats what i think anyway. i do realise though that if i was to properly vs a performace car (you name it) i have no chance in hell but for an average car of its age and cc's its pretty good.

[Soop]

Yes. Context is important when saying this like that. But really. A Snail is fast, compared with a corpse.

[Xon]

Anyways i won't defend the N/A much more untill i make a decision after driving a ej20t or tt and thats if i ever do.

6 months ago I would have agreed with you, but I think if you go find an EJ20t converted Liberty you'll realise how useless the NAs are for performance.

[N/A_EJ22]

First time i drove my car i thought it was quick............only because id just hopped out of mums bucket of shit 1.3L Jazz. Now i hate my engine. its an AID's ridden piece of arse!!

[Blaeven]

6 months ago I would have agreed with you, but I think if you go find an EJ20t converted Liberty you'll realise how useless the NAs are for performance.

+1

i've driven dylans ej20t...

i hate NA now...

[ams]

what do you guys think of making vids of 0-100 of N/A's and turbos??

There's already some on pootube

[jak4cars]

yeh cheers. on first gear were pretty similar but on second the B4 just shoots off where as mine just TRIES really hard. actually mines worse in first gear too, in both gears my car just becomes gutless after 5500rpm, which is normal aye.....

[Soop]

wat? Seriously. Turbo > NA. There isn't even a comparison to be made.

[jak4cars]

wat?

Seriously. Turbo > NA.

There isn't even a comparison to be made.

of course the B4 is faster but on first gear i'm not too far behind, like my car revs similar(but slower) to that then on second gear the B4 really pulls where as mine becomes slow. i think i will make a vid.

[twinturbosubaru]

LOL, then you get a single turbo TT Legacy with a Sti box and 4.11's, then you have a quick 1st gear Paul

[twinturbosubaru]

Although this is my next car....



Paul