subnoobX

Hi all,

I have a JDM STI 2003 and I wanted your advice regarding the Garrett GTX3071R twinscroll turbo with 0.82A/R housing. I am going for the rotated option and planning to crack 400whp on 98octane . Do you think this turbo will be able to crack 400whp on 22psi+ boost? I will be running stock block but all the mods required to maximize the turbo though. Would this turbo be able to crack 400whp with a smalller hotside???
http://www.racingpartssolution.com/garrett-gtx3071r/



I was thinking of SC50 twin scroll (if they have any) before but I can get the GTX3071R twin scroll for cheaper and gives me some money to rotate it.
Which one of these turbos will spool quicker?

My other mods are:

Tial EWG
FMIC Intercooler and Intake
Walbro 255 L/Hr Intank Pump (upto 500hp)
Air filter
Turbo Back exhaust, headers and up-pipe
NGK spark plugs
ID 1000cc Injectors
Tial Q

jura11

iTrader: (7)

Hi there

I would go down the route of the Single scroll Billet GTX3076 with .63AR which should make easily 500bhp with right mods,just you will need to get rotated kit(from £500 per kit,just beware of US kits which are not good for LHD cars)

Twin scroll option which you can too consider is the Borg Warner EFR range,great turbo with awesome spool up and which should make easily too 500bhp,those turbo are much cheaper than GTX range and people over in USA have great results with them

Plus would change fuel pump for Walbro 450LPH,great fuel pump which should be OK for yours needs and future upgrades,we are run 340LPH at 490bhp/480lb-ft


Jura

Infected by sti

iTrader: (6)

One of the guys from our local forum is running a sc50 and I beleive he is v happy with it, its also a standard position turbo so would save alot of potching and money iirc.

I would also opt for a different fuel pump than the walbro 255, I would be more inclined to run a HRC / RCM 340 pump but each I their own

subnoobX

Thanks for your reply Jura. Are you recommending the single scroll 0.63A/R hotside because it is not available in twin scroll? I wonder if anyone can make the 0.63 A/R twinscroll housing.

Yes I have been looking at the EFR range but again they are limited to single scroll (for the power output I want) unless I missed something. I am getting the custom kit fabricated so wouldnt be a problem.

Cheers for that Infected. Is he running it on a JDM 2.0l motor? or 2.5l?

jura11

iTrader: (7)

Hi there

I've seen GT3076 with twin scroll housing,think Full race selling this turbo option,EFR is too twin scroll what I know(mostly are single scroll,but have too twin scroll),but have look too on the S200SX or S300SX range



Jura

Infected by sti

iTrader: (6)

He is running on a forged 2.0, have a look thought the welsh section there is a write up on it, the guys username is cannon fodder aka Tyrone, I'm sure he will happily answer any Q's you have regarding the blower he's a good guy

rickya

iTrader: (18)

Any update on this?

subnoobX

Nope overseas at the moment due to work but will get it sorted. planning on GTX3071R T/S version

rickya

iTrader: (18)

In rotated or stock position?

subnoobX

Hi, it will be rotated but for stock location Blouch 1.5XTR or 2.5XTR T/S will be great.

rickya

iTrader: (18)

Do you know where in the US I can get a 2.5xtr twin scroll in stock position?