Dubzy

iTrader: (4)

I have a V8 uk sti and im in the process of getting the last bits together for a power upgrade. I have a Md321T billet which for the time being im going to run on the standard sti top mount and standard air box along with a full decat, fuel pump, panel filter and 3 port boost solenoid etc. Now as i understand the top mount, the standard airbox and the pink injectors all max out at around 400bhp.

My question is will my pinks be ok if i add a fpr for a bit of head room or do i need to purchase bigger injectors now ???

I do have future plans for more power but would the above setup be ok or am i asking for trouble ??

Has anybody got or mapped a similar setup ??

Cheers
Dubzy

barnshaw

iTrader: (1)

you may aswell go for larger injectors now, if you change them going forward you are only going to have to get it remapped again anyway, false economy.

wrxyz

iTrader: (2)

Look at Andy Forrests web site, that will give you a good idea what you will get and where you need to go.... just Google it

Dubzy

iTrader: (4)

It will need remapping again anyway as will be fitting various other mods ie front mount, headers and induction kit etc.

beliblisk

iTrader: (16)

550ccs should feed 400bhp with FPR without issues (i will be doing same thing soon).

Dubzy

iTrader: (4)

I have done mate and the engine tuners guide, i was hoping someone had done a similar setup for comparison, Im just thinking if my pinks can safely get the most out my standard airbox and top mount ic with the aid of a fpr then then theres no point changing them until the next round of mods where i will be needing 740's. There not the easiest of things to source and i would also feel safer driving to the mapper without larger injectors in unless neccesary.


I havnt decided whos mapping it yet but guess i should speak to a few first.

Dubzy

iTrader: (4)

Thanks buddy, 740's seem a bit overkill while still on standard airbox and ic but just unsure about the safety aspect of bumping up the pressure.

cookstar

iTrader: (6)

You could always have your pinks reflowed by Lateral Performance.

banny sti

iTrader: (68)

Modded wrx top feed injectors will flow around 8-900cc's depending on fuel pressure. Personally I would run the car with pinks max the setup and change them out when you want more power

Dubzy

iTrader: (4)

Its my daily driver so dont really want it off the road, i may look into the price of getting some wrx injectors modded for the next round of upgrades though.

peter zippy reid

iTrader: (25)

When i mapped my md321t billet andy f told me to add avcr to get the boost required to get the power i made 431bhp 385ft/lb on 2.0l sti

cookstar

iTrader: (6)

They might do an exchange deal, give Mark a call.

Dubzy

iTrader: (4)

I think thats what i will do for now buddy, just get the mapper to keep it in safe perimeters whilst hopefuly getting the most out of the ic and airbox.

Dubzy

iTrader: (4)

Are you still running standard top mount, pinks and airbox at that power??

Dubzy

iTrader: (4)

good call and yes i will do

peter zippy reid

iTrader: (25)

no mate my spec was
md321t
650cc injectors
hdi fmic & innerwing kit
avcr
fpr
scoobyworx 255 fuelpump

Dubzy

iTrader: (4)

Similar spec to what i will be eventually aiming for but im staying on standard top mount and airbox for now hence the question about injectors. Avcr on my list now though

beliblisk

iTrader: (16)

I think you wont need electronic boost control to hit 400 as standard ECU can go till 1,55bar,i think

wrxyz

iTrader: (2)

When I spoke with Andy Forrest I am sure that he said that around 450 was the max on a stock airbox and top mount

banny sti

iTrader: (68)

Injectors available

https://www.scoobynet.com/subaru-par...induction.html

Shaun

You won't hit the required airflow on the standard airbox for 450bhp. Been there and tested that.

You'll struggle to hit 400bhp on the standard injectors with standard fuel pressure imo. It won't be far off, and in my opinion the price of another set of injectors isn't worth it at this level.

I'm not convinced you need to worry about an additional boost controller either. You can get around the 1.55bar cap on the UK ECU's, if that was actually a problem in reaching 400bhp on a 321T (which I'm not sure it would be in any case - you'd need to get that confirmed).

peter zippy reid

iTrader: (25)

Only reason i added avcr was i wanted to push to as close to the 450bhp the turbo was rated at and andy said to get avcr to up the boost past 1.55bar

Ginola

iTrader: (25)

You can just remove the safety cut on the standard ecu to get passed 1.55 bar.

Though an Apexi boost solenoid is a nice and fast.

Dubzy

iTrader: (4)

intresting, i will update what mine makes once mapped
Cheers buddy, ive just messaged the seller

Cheers for the info

Dubzy

iTrader: (4)

thanks mate, got one on the list ready for when i take things a bit further.

cheers

Dubzy

iTrader: (4)

New injectors now sourced, thanks for all the info guys and thanks Banny, been looking for some for weeks and keep missing out. Just a few small items still to get then i will start a thread and update what it makes once mapped

jura11

iTrader: (7)

Hi there

On MDX321T you should be running no more than 1.7bar(we are made on 1.7bar on MDX321T 452bhp) and as above ECU can read only 1.55bar,but most of mappers don't go above 1.45bar on standard STI MAP sensor,if you want go above,option is go Open source and CarBerry and use bigger MAP sensor or still use EcuTek and ask yours mapper what will be best option

STI Pink injectors not sure if they be able flow enough 400bhp on standard fuel pressure,maybe with aftermarket FPR yes you should be able,but IDC will or can be bit higher

Thanks,Jura

Dubzy

iTrader: (4)

Cheers Jura....Ive now got a set of 660's and an apexi avcr to go in before mapping, im curious to see if i can join the 400 club whilst still keeping the standard airbox and top mount ic...

Shaun

Assuming your engine and ancillaries are working as they should, you'll reach 400bhp on the OEM airbox and TMIC.

Dubzy

iTrader: (4)

It will be great if i can but anywhere close will do, its booked in next week to go on the rollers for a health check to make sure its good to go