HI guys,

Just wanted to ask about what injectors to get for my '97 wrx.

What will my car have as standard and what should I buy,

I've got a decent air filter and exhaust so far so next want to buy fuel pump and injectors, then i'll be looking into turbo and intercooler.

I've read lots of posts about injectors being 'top/side feed, adapters' but don't know what i should be looking for, maybe 440's?

Advice please.

 

You understand you dont have a mappable ecu dont you? something like a simtek (which is lower end of the market) is circa 1200 quid mapped and fitted?
Plus what is your goal?
I would look at the brakes on your car first, 2 pots are not sufficient for the 276bhp your car has out of the box, a good set of 4 pots will set you back (and I dont mean the subaru ones) 7-900 quid, plus there may well be a big hike in your insurance (depends who you are with but it will go up and some insurance co's wont let you modify), so look at the supporting modifications to start with (that may include wheels to fit the brakes under)

Tony

 

I have read somewhere that certain ecu's aren't mappable, is that the case with mine then? Can I just get a second had one out of an STI and remap that? Suppose my goal is any where over 300 bhp.
Brakes, I've recently Put on a set of 4'pots front and 2 pot rears but they are the Subaru ones.

All advice (criticism good or bad) appreciated.
Thanks.

 

hi there

i have a '97 wrx wagon and over the past few years have done a few mods here and thee that may help you out as it sounds like we are both aiming for similar figures.

the standard injectors in a wrx wagon are 380cc i think. I got a second hand set of 440cc sti injectors for 80quid and sent them off for cleaning and flow testing (they got a max flow out of them after cleaning of 500cc). ECU wise i got a second hand Apexi FC withy the hand controler for £400. The back box was wrecked on it so i went to a TSL Group N back box, Japspeed straight through center section and Japspeed sports cat down pipe. I also changed the standard TD04 turbo for a second hand VF23.
The standard '97 WRX wagon made about 230bhp iirc, mine was dynoed at 225bhp before any modifications, and 276bhp after the above mods. My mapper said he had put down a relatively safe map and right enough the det readings are always very nice and low. injector duty never exceeds 87% so there is room there to rax it out a bit more. It is pretty fast at that a power but i was expecting a little more... thing is after looking at the graphs from the dyno run we could see my boost peaked at 4000rpm before declining at a steady rate. despite this peak power is still up at the redline, so better quality boost control should help me out alot (Electronic boost controller, they mapped it on a manual boost controller, standard 2 port boost solenoid was apparently fooked). the tail off in boost may mnot be an issue with you car so you may well see higher power for the same mods, all cars are different i guess ;-) oh, i also installed 4pot calipers as you have done and stuck on a set of whiteline antirollbars and heavy duty droplinks (22mm F&R for me) which, as many will say here, was a fantastic modification!
i hope some of this helps you, i know i can go on a bit somethimes! All the best!

 

Thanks mate thats really helpfull, so if i get some pink sti injectors of any classic they'll go on ok? Where did you send them to get cleaned? Did you replace the fuel pump as well?

 

Hi there

STi pink on yours will not fit,due you have side feed injectors and converting to Top feed yours is little bit expensive(Carl Davey selling Top Feed conversion kit for £160)

Best if you could find 440cc and get them re-flowed to Mark@Lateral Performance or here Rich@FB Tuning.

I would replace too Fuel pump for Walbro 255lph.


Jura

 

So 440cc side feed is what I need, Thanks. What do they do to 're-flow' them then?

Sorry for all the questions, i'm just trying to learn as much as i can at the mo.

Also I know my turbo is TD04 but what type? I've read about 'front entry, 90 degree, also whats a twin scroll?

 

Ah I didnt see you had a wagon, your best bet is some 440cc injectors off an STI (version 3 or 4) as those should fit.
Twin scroll isnt something you have, thats for the MY03 onwards JDM STI's, basically it gives better spool up and power delivery making the car more drivable, you need a twin scroll turbo (not many around and the ones that are, are normally not cheap), plus you need alot of other bits to go with it.

Tony

 

If you get them re-flowed you should have 800cc,they're will be OK for 550bhp with supported mods.

Yes your turbo is Mitsubishi TD04 and this turbo is OK for 270-280BHP with supported mods.Its just TD04L.

Front entry conversion for TD05 is mainly used on New age,if someone would like fit TD05 from classic on New age.

Twin scroll on your car its not worth,due you don't have AVCS and your ECU cannot run AVCS,with some aftermarket ECU you can control AVCS.

Best turbo for yours is VF28,VF30,VF34,VF35 or older TD05-16G.


Jura

 

I was aiming for 300+ bhp, will all these turbos go straight on, no mods? or is there pipe work to re-configure?

 

Yes these turbos will go straight on,but not sure about the yours ECU,if can be mapped via EcuTek,if not you should have look for ESL daughter board,Apexi PowerFC or SimTek.

Your pipework can be re-used again without the problem.

VF28 should make 320-330bhp,VF30-330-350bhp,VF34 330-360bhp and VF35 330-350bhp...



Jura

 

Yeah apparently i'll have to get another ecu, Thanks for your advice Jura it's really helped.

Nice one!

 

Oh! 1 more question. Obviously a front mount is better but would I get away with my standard intercooler? would a Top mount STI be ok? Shall i just spend the extra for front mount?

 

Front mount will be wise,because if you want fit STi TMIC you will need more than just TMIC.
FMIC is still way to go

I would suggest Harvey HDi are good one and are proven too.



Jura

 

ok thanks matey

 

you cant flow version 3-4 injectors you need phas etwo injectors p.s if yuours is a 97 wrx they may be 440cc injectors which can get oyu to the 340hp see if there yellow

 

Your car with TD04 turbo and 380cc Phase one and a half (Phase 1) injectors and existing top mount is capable of somewhere between 260 and 290 bhp. A new Walbro fuel pump should be at the top of your list.
Yellow 440 injectors Phase 1 are capable of 320 bhp or a little bit more but as soon as you change the injectors you need an aftermarket ECU so you can map accordingly. At this point it becomes expensive so why not try to get the best you can out of your existing setup.
Fuel pump, 3" open neck downpipe and complete decat exhaust, ported headers, matched uppipe.
To go further you need 440 injectors to get to 320 plus bhp or 550cc injectors that are good all the way to nearly 400 bhp. Choice of ECU could be Apexi Power FC or Simtek and turbo will determine ultimate power. TD05 16, 18, or 20G all front entry. Any of the VF series 23, 24, 28, 29, 30, 34, 35, 43.
Once you go on to yellow injectors you also need a front mount.

 

I've just looked and my injectors are grey. Looks like I've got some money to spend then! Better start selling some stuff to pay for all this lol!

Can I put all this on before I get it remapped, will it still run ok?

 

you can pick up a set of yellow phase 1.5 for about 80 qiud dont pay any more for them

and i just sold a set of 550cc power enterprise injectors for 220

 

Don't put on car without the mapping injectors or turbo,try source all parts and get them mapped in once,you will save good money.



Jura

 

very true

 

Yes mate, forgot to mention that, i got a second hand walbro 255l/h.
I sent the injectors off to Injector Tune, good service.
As others here have mentioned, the 440cc injectors i got were yellow, phase one i think which ment my garage needed to get a fitting kit for them iirc.

ha, it's funny i have been wondering about FMICs too so maybe i should think about this upgrade aswel if the MY97 wrx wagon topmount is stuggling a bit above 280bhp? would only be concerened about more lag (??) and being forced to run a cone filter or sililar (MAF!).

 

See bud you've learnt something too! Everyone's happy!!! Right off to the Marketplace!!

Thanks fellas.

 

let us all know how you get on! Wagons rule!

 

https://www.scoobynet.com/subaru-par...t-cleaned.html

What do you think?

 

well they are newly cleaned and he is right, cost me £80 for flow and clean. Mine came out at x3 500cc and x1 495cc but think mine were phase one, weather that would make any difference i don't know. Yeah why not, and ask for the invoice from the injoctor cleaning company too

btw mate if it is of any interest to you i started a thread asking about the TMIC we both have. As Harvey mentionedon on your thread here the WRX intercooler looks to be insufficent, i think i will be going for a TMIC from a same-year sti. not sure i can be bothered with cold air feeds and stuff when going down the FMIC route. All i'm trying to do after all is break the 300bhp barrier