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Old 04-13-2019, 06:42 PM   #1
frostyspool
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Default Turbo upgrade on a 2006 WRX

I'm going to be getting my hands on a Blouch 1.5 xtr for my 2006 wrx and would like to know what the required support mods are so that I can have this thing running as it should.

I daily drive my wrx but do have a temporary secondary mode of transport should I be without it while its off the road for the install and tuning.

Current mods are very light:
K&N typhoon Intake
AVO dump pipe
HKS catback
Walbro fuel pump
Exedy heavy duty organic plate clutch
BOV
Strut brace
Coilovers

I'm looking at upgrading the stock intercooler for a process west tmic, grimmspeed up pipe, grimmspeed 3 port boost solenoid.

Would I need to upgrade the injectors and get a cobb accessport or a brake upgrade due to the increased performance? As you can see I'm not entirely sure what I need to make this work but being a daily I'm not chasing high kw/hp numbers on the dyno but rather a reliable street car with a performance upgrade over stock.
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Old 04-13-2019, 10:20 PM   #2
Dave D.
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Location: Menzel Lake, WA
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06 Red Ltd.Wagon
20gxtr JJ tuned

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1000cc injectors would be good for pump gas. Upgraded fuel pump a must as well. On a stock block I'd recommend a 20psi or less tune.

With a stock block and your mods be prepared to replace the motor and/or tranny if you decide to turn it up for power.
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Old 04-13-2019, 11:48 PM   #3
frostyspool
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I always fill with 98ron, could I run this turbo with the stock injectors or is it a requirement to get those 1000cc?

Definitely not looking to replace the motor or tranny any time soon so yeah id prefer to keep the tune to a moderate boost level.
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Old 04-14-2019, 12:45 AM   #4
Dave D.
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06 Red Ltd.Wagon
20gxtr JJ tuned

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Quote:
Originally Posted by frostyspool View Post
I always fill with 98ron, could I run this turbo with the stock injectors or is it a requirement to get those 1000cc?

Definitely not looking to replace the motor or tranny any time soon so yeah id prefer to keep the tune to a moderate boost level.
You could bolt in a VF39. It's the stock STi turbo for that year and the engine is already designed to take it. A huge bump from the TD04 -- a lot of fun and power for a streetable car. Usually good for 300+hp
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Old 04-14-2019, 02:42 AM   #5
frostyspool
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I'm set on getting the xtr installed as I already have it
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Old 04-15-2019, 06:46 AM   #6
frostyspool
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So from what I've been reading at around the 300kw atw range is when I should be looking at changing the stock pistons over to forged pistons, I'm not aiming at this power range right now but hopefully in-between 220-250.

Is anyone out here running this sort of power with stock internals and upgraded turbo safely?
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Old 04-15-2019, 10:46 AM   #7
Dave D.
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20gxtr JJ tuned

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Quote:
Originally Posted by frostyspool View Post
Is anyone out here running this sort of power with stock internals and upgraded turbo safely?
Here's the "age old" guide from Nasioc. Been updated over the years:

https://forums.nasioc.com/forums/sho....php?t=1393580
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Old 04-16-2019, 03:17 AM   #8
frostyspool
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Thanks!
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Old 04-16-2019, 05:35 AM   #9
jeff6666p
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Quote:
Originally Posted by frostyspool View Post
I always fill with 98ron, could I run this turbo with the stock injectors or is it a requirement to get those 1000cc?

Definitely not looking to replace the motor or tranny any time soon so yeah id prefer to keep the tune to a moderate boost level.
It's not required but you won't be able to make any real boost with the stock injectors. 850cc would be enough if you don't plan on upgrading to a bigger turbo in the future.
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Old 04-17-2019, 04:28 AM   #10
frostyspool
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The only injectors I can get are the ID1050x, cant seem to find any 850cc variants. Would it be overkill for my turbo build?

Last edited by frostyspool; 04-17-2019 at 04:43 AM.
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Old 04-17-2019, 08:52 PM   #11
danger1138
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Quote:
Originally Posted by Dave D. View Post
1000cc injectors would be good for pump gas. Upgraded fuel pump a must as well. On a stock block I'd recommend a 20psi or less tune.

With a stock block and your mods be prepared to replace the motor and/or tranny if you decide to turn it up for power.
If you dont go crazy, as in constantly romping on the gas, lugging the engine, getting on her when shes cold your block should last, with a good tune obviously.

Just monitor your oil and coolant amd with what i mentioned above you'll be good to go.
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Old 04-20-2019, 04:40 AM   #12
Subaru ST
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id go with 1000 CC injectors and a high flow fuel pump!!
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Old 04-21-2019, 01:32 AM   #13
frostyspool
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Currently have a walbro 255 and will be picking up some ID1050X injectors and most likely those top feed IAG fuel rails.
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