Am i right in thinking that my my94 wrx has 380cc injectors?

To get the most out of my td05 16g would i need to fit bigger injectors?and what size would be best if i do need bigger ones.


Cheers for any advise.

 

yes your correct 380cc's are standard to get the most from the 16g your going to need 440's to 550's along with other supporting mods like front mount, ecu remap like ESL live or stand alone ecu and a 3 bar map sensor, then after you have done all this you will need a new gearbox as the 16g will easily break it.

 

Cheers for the answer,
Im slowly getting all the other supporting mods together now.
Would i also need a 3 port boost solenoid?

 

no worries, your car being a my94 will already have a 3port boost solenoid

 

3port boost solonoid was fitted on mine allready but buy a 3bar map sensor to go over 1.15bar , i got mine from ebay for 37.95 works a treat the voltages and kpa are the same as the greddy and hks and for a extra 3.95 they supply the connector adapter efi-parts.co.uk is the company name

 

Thats good,

What do you think will be the holding be back,without changing the turbo yet as im still on the standard gearbox?
Is there anything else i should add?
This is going to be my spec.

forged 2.1 cdb
simtek
walbro fuel pump
td05 16g
440cc injectors
Fmic
rcm induction kit
2.5 inch magnex exhaust
2.5 inch De-cat down pipe

 

The only thing missing there to get the best out of your spec might be ported headers and a matched uppipe and that should take you as far as you can get with 440 injectors. These max out anywhere between 325 and 350 bhp but you will need a fuel pressure regulator to get them towards the 350 mark.

 

Would it not be better to go up a size on injectors to give a bit more head room? As from what Harvey says any further upgrades would need new injectors so paying out twice.

 

Cheers for the relpy harvey

Im only aiming for around 320 atm so i dont think i will bother with a fuel pressure regulator.Also i will be going for equal headers and a 3" exhaust but i want to get a 6 speed gear box/decent clutch first tho.

 

Im only looking for around 320 bhp so the 440cc injectors will do for me,and i have a seen a set in the for sale section so they wont cost me loads.

 

If your only looking for 320bhp you dont need a 6 speed. And a 16g wont destroy your box.

 

Im wont be staying at 320 for that long,i will be aiming for around 500bhp but need to save some money for a 6speed box and clutch first tho.I just want abit more power without spending to much money atm before i get a new box/clutch to cope with the extra power.So 320 seems like a fairly safe power to run at with regards to my gearbox as long as i dont abuse it to much.

 

Why equal length tubular headers and what make???
Steve :
If it was me and I knew I would be going further I would go to 550s immediately and if my target was 400 bhp I would go straight to 740cc but Olly is on a limitted budget and I am giving him advice within the confines of what he can do now.

 

you can get a set of yellow sti 440 for less then 80 quid second hand and then sell them at a later date for a simalar price

 

Sorry the late reply.

I read on here to make around 500bhp i would need equal length heads.I have been looking at the rcm/Gt spec headers.I have brought some 440cc injectors as i found some on here for £70 or i would of gone with a bigger ones.Im just trying to save money at the moment hence only buying 440cc's.

Plus i can just sell the 440's when i go for bigger injectors in the future.
Thanks for the advise

 

Don't believe everything you read on here.
You don't need equal length headers for 500 bhp. Perhaps you are confusing equal length with tubular?
There are GT2 spec type headers and these are available in equal length for twin scroll cars and unequal length for Classics and others.
I have a set of GT Spec equal length headers here, new and boxed £395 but they probably won't fit your car without changing the sump. I also have GT2 spec unequal length headers new and boxed, same price but these are unlikely to be your best option if you are running 440cc injectors which will max out between 325 and 350 bhp subject to fuel pressure.
Genuine equal length headers will make your exhaust note sound like a Jap motorbike where unequal length headers are responsible for the burble associated with Subarus.
If you want more information let me know.

 

You are right about me being confused over equal length headers and tubular headers.Whats the difference between the two?
Also what headers would you recommend i go for?I would still like stay with unequal length as i would like to keep the scooby burble if i could.

 

with a few mods and 440 injectors my car made 340.3 bhp if you want more you would need 550 injectors

 

mine for some reason maxed out at 1.2 bar on 440's prob not even over 300! looking for some 550's ph 1/2 if anyone has any for a decent price?!

 

On a TD05/VF35 type/power/ turbo your best choice is O/E headers ported complete with matched uppipe.
Far higher up the power stakes there comes a point, probably around 400 bhp but it varies from car to car, where you MAY be better off with tubular headers. Take care however because the uppipe supplied with three bolt GT2 Spec type headers will slug spool and retard the spool point. Hence the need for my special three bolt uppipe.

The burble on a Scooby comes from the unequal length of the runners on the exhaust manifold or headers as they are called in Subaru circles. The unequal runners give the off beat burbble.
Equal length headers are tubular and as the name suggests, the runners are of equal length so the off beat burble is lost.
Few of the tubular header sets I came across are true equal length.
Although I have tested equal and unequal tubular headers of similar design I am unable to say that one or the other performed any differently.