What are these injectors rated upto bhp wise ??


Si

 

At what fuel pressure?

Anymore than 330-340 BHP at standard fuel pressure you will be wanting to look at 550's TBH

 

yer id like to know that too hehe...can these take 420 - 450bhp?

 

geez I'm pushing 330bhp on standard 380's using the OEM FPR, with Walbro 255 pump

 

No! at that amount even 550s are past threshold as well.

FYI, my 550's at 3 bar pressure circa 405 BHP are running at 93% IDC

 

ffs so what injectors do i need then?

 

I bet the reply will be 740's

 

gulp ihope not...i cant afford it loooool

 

Why run them right on the limit? cant think of any more of a waste of time than your mapper not being able to sort the job out cos your fuel supply is maxed out on the day.

 

oh great...i bet he aint gunna be as angry as me bank manager!!!!!

 

Judging by my own car, i should think you could do 450 on 550's but with a higher FP, but i would just put 740's in TBH

If you cant afford to do it properly then dont do it. Your fuel consumption at 450 BHP will mean that the difference in cash between 550's and 740's will soon be eaten up in a few tanks worth so maybe your pushing your budget anyway?

Not saying that in a rude manner, just pointing out that everything costs somehow.

 

ok mate, i just aint budgeted for it as all the over work is gunna cost 3k and id budgeted 150 for injectors....how much do you think im looking at for either 550s or 740s?

 

3K does that include the pistons and rods, labour to build the bottom end you will need (assuming you are still on standard subaru stuff and / or you are not DIY'ing it), Turbo, intercooler, all the other things you will require etc to a) achieve this and b) do it reliably?

I would also save a bit for a gearbox unless you are on a 6 speed STI box already

 

all i planned for is:
2.5 bottom end
steal gaskets
AFP5-20 turbo
FPR and the injectors

I already have sorted....
Apexi Power FC
Apexi FC Commander handset
Apexi boost control kit
front mount intercooler
HKS downpipes/headers
HKS S/S exhaust and full decat
Bailey Bumpvalve
Uprated Plugs
Welbro Fuel Pump
Lightweight/underdrive pully set
Wizards of NOS kit

 

just seen about the box..yer ur defo right there mate, me last one only lasted 6 months and this new one is starting to go already

 

Im assuming you are using a 'built' 2.5 motor and not a standard subaru 2.5?

450BHP and nitrous means i dont think a standard one will last long if you give it the beans.

I honestly think you are underbudgetting a bit to try and run that kind of BHP reliably.

Wah, sorry for the hijack, my last post on this

 

agree with mark

you could waste 8k on building a wrx to 450 bhp easily (not doing the work your self)

whats made you go for nitrus rather than a bigger turbo

 

price mate, and i dont need the power all the time

450 is including the nos like..want around 375 from the engine alone

 

BIG BANG IMINENT!

450 is 450 is 450. if the pistons cant take it, they wont - never mind if its produced by nitrous or a frapping great turbo!