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04-24-2006, 09:28 PM | #1 |
Scooby Newbie
Member#: 69608
Join Date: Sep 2004
Chapter/Region:
TXIC
Location: Austin, TX
Vehicle:2004 STi Silver |
Bigger Injectors with a stock STi?
I am going to be rebuilding an STi I just bought and I would like to put some forged pistons and helix 860cc injectors. Does anyone know if I can do this and keep it stock without running into any problems. I am upgrading to a gt30R kit later on and dont want to have to replace injectors and pistons then if it will be out of the car now.
-Matt
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04-24-2006, 09:41 PM | #2 |
Scooby Specialist
Member#: 110273
Join Date: Mar 2006
Location: OC, California
Vehicle:450 whp 30R STI 10.96@126 |
DO NOT run bigger injectors without engine management, you can ruin your motor.
If you plan on installing forged pistons, i would also look into doing to whole bottom end while you are in there. It costs quite a bit to pull the motor and open it up. My suggestion is while you are in there, you should upgrade everything so you don't have a weak link. |
04-24-2006, 10:06 PM | #3 |
Scooby Newbie
Member#: 69608
Join Date: Sep 2004
Chapter/Region:
TXIC
Location: Austin, TX
Vehicle:2004 STi Silver |
What weak links other than pistons would I have to worry about? And I couldnt use an SAFC or anything or an AP?
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04-24-2006, 11:16 PM | #4 | |
Scooby Newbie
Member#: 68988
Join Date: Aug 2004
Location: NC
Vehicle:2015 STI Grey |
Quote:
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04-24-2006, 11:25 PM | #5 | |
Scooby Guru
Member#: 9794
Join Date: Aug 2001
Chapter/Region:
TXIC
Location: Texas
Vehicle:02 2.5LWRX-Retired 335i w/twins |
Quote:
Simple answer, don't do injectors unless you have EM. Used EM is only $500 anyway. |
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04-24-2006, 11:29 PM | #6 |
Scooby Newbie
Member#: 76903
Join Date: Dec 2004
Chapter/Region:
MAIC
Location: Northern Virginia
Vehicle:2004 WRX STi Silver |
if you're gonna spend money to get pistons put in,you might as well do everything at one time to save money.mine is in the process of being rebuilt as we speak.my valves floated so i decided i might as well get it rebuilt since it was gonna cost me a lot to get them fixed.I dropped $8k for the project.Custom forged pistons and rods,rod and main bearings,arp headstuds,darton race sleeves,new gaskets,ferrea valves,retainers,locks,seals.other mods on the car right nowerrin catless race pipes,hks 3inch turboback,perrin 816ccs,perrin fuel rail,walbro fuel pump,utec,fp green,aps dr725,clutchmaster single plate clutch w/flywheel
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04-24-2006, 11:36 PM | #7 |
Scooby Newbie
Member#: 76903
Join Date: Dec 2004
Chapter/Region:
MAIC
Location: Northern Virginia
Vehicle:2004 WRX STi Silver |
forgot to add that i was upgrading from the green to gt35R.i'm selling my green if ur intersted.1500k miles on it.1250shipped
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04-25-2006, 12:04 AM | #8 | |
Scooby Specialist
Member#: 56468
Join Date: Mar 2004
Chapter/Region:
NWIC
Location: Seattle, WA
Vehicle:04 Improved STI Dirty White |
Quote:
Buy a Walbro pump. Think about calling a reputable performance shop/vendor and discussing an upgrade path. If you are yanking the motor, there's tons of stuff you can do while it's out. I recommend www.worldoneperformance.com becuase I know all of them well. |
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04-25-2006, 09:20 AM | #9 | |
Scooby Newbie
Member#: 68988
Join Date: Aug 2004
Location: NC
Vehicle:2015 STI Grey |
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04-25-2006, 09:36 AM | #10 |
Scooby Specialist
Member#: 78165
Join Date: Dec 2004
Chapter/Region:
South East
Location: SC
Vehicle:05 STI 35r + e85 |
Swapping injectors with the motor in the car is really easy.
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04-25-2006, 04:15 PM | #11 | |
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Member#: 16200
Join Date: Mar 2002
Vehicle:OK buy Nates beans westcoastroasting.com |
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04-25-2006, 04:18 PM | #12 | |
Scooby Specialist
Member#: 46399
Join Date: Oct 2003
Chapter/Region:
MWSOC
Location: Grand Rapids, MI
Vehicle:0000 Knows nothing, about nothing. |
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04-25-2006, 05:14 PM | #13 |
Scooby Newbie
Member#: 69608
Join Date: Sep 2004
Chapter/Region:
TXIC
Location: Austin, TX
Vehicle:2004 STi Silver |
Im coming off of an 02 wrx, injectors took a while for us.
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