v2 sti, which ecu should i use? - Subaru Impreza GC8 & RS Forum & Community: RS25.com

garrett · 10-02-2009, 09:04 PM

i have an impreza swapped 1995 v2 closed deck sti. they guy i bought it from said it has the sti ecu and sti chip which should boost stock 14.5 psi, right? well with a cattles dp runnning through an 04 sti stock cat back and everything else completely stock i am only reading 10 psi? it reaches 10 at about 5k but i still have another 2k to go and boost stops climbing, i checked for boost leak along the boost gauge and didnt find anuthing, whats up with this?

cusco-awd · 10-02-2009, 10:41 PM

What ECU does it have now?

attyjdgn · 10-03-2009, 03:18 AM

I have a wrx sti version 2 type ra that is totally stock. The stock boost is .7bar. The ecu can handle up to 1 bar of boost before the fuel cut kicks in. you need to put an adjustable boost controller to get to 1 bar ob boost. It does not come at 1 bar standard

garrett · 10-03-2009, 04:42 PM

so what would be a good amount of boost for this motor, like will it run healthy on 1 bar, or with higher fuel pressure or injectors is it safe to take to to 1.5 bar or more around 17 18 psi. im just trying to weigh my options for how i should set the car up to run reliable with around 280-300 to the wheels

attyjdgn · 10-04-2009, 05:55 AM

It can run up to 1 bar then the fuel cut kicks in, therefore i would assume any boost over 1 bar is unsafe, unless maybe you upgrade injectors and/or fuel pressure coupled with an ecu.

**scoobyke** · 10-04-2009, 06:43 AM

You could run 1 bar ok as long as its been mapped for it,check fuel pump make sure it up rated,also injectors will be fine for 1 bar,mite look at getting fuel regulator...

garrett · 10-08-2009, 01:12 AM

what tunning and ecu options do i have with obdI all i see is tunning for obdII?

garrett · 10-08-2009, 01:29 AM

i have also seen someone do a usdm wrx ecu swap, is this hard and why not the usdm sti ecu?

garrett · 10-08-2009, 01:30 AM

a good plan to me seems like usdm ecu then piggy back it with something like the cobb access port. but i dont even know if this is possible just sounds good

attyjdgn · 10-08-2009, 09:28 PM

I'm getting a mapecu2 for mine. It's being shipped now as we speak. check it out at mapecu.com

10-02-2009, 09:04 PM	#1 (permalink)
garrett 1.8L Car: 93 impreza/95 v2 sti Fav Mod: motor My: Subaru Parts Join Date: Sep 2009 Location: norcal Trader Rating: (0) Posts: 26	v2 sti, which ecu should i use? i have an impreza swapped 1995 v2 closed deck sti. they guy i bought it from said it has the sti ecu and sti chip which should boost stock 14.5 psi, right? well with a cattles dp runnning through an 04 sti stock cat back and everything else completely stock i am only reading 10 psi? it reaches 10 at about 5k but i still have another 2k to go and boost stops climbing, i checked for boost leak along the boost gauge and didnt find anuthing, whats up with this?

10-04-2009, 06:43 AM	#6 (permalink)
scoobyke Premium Member Car: Subaru GC8 gt uk spec Fav Mod: TDO5 16G BIG My: Subaru Parts Join Date: Oct 2009 Location: Ireland Trader Rating: (0) Posts: 9	You could run 1 bar ok as long as its been mapped for it,check fuel pump make sure it up rated,also injectors will be fine for 1 bar,mite look at getting fuel regulator... __________________ 300bhp/298 lbs/torque....

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10-02-2009, 10:41 PM	#2 (permalink)
cusco-awd 2.0L Turbo Car: Lego Wagon My: Subaru Parts My: Subaru Blog Join Date: Dec 2006 Location: DFW Trader Rating: (7) Posts: 1,443	What ECU does it have now?

10-03-2009, 03:18 AM	#3 (permalink)
attyjdgn 1.8L My: Subaru Parts Join Date: Sep 2009 Trader Rating: (0) Posts: 19	I have a wrx sti version 2 type ra that is totally stock. The stock boost is .7bar. The ecu can handle up to 1 bar of boost before the fuel cut kicks in. you need to put an adjustable boost controller to get to 1 bar ob boost. It does not come at 1 bar standard

10-03-2009, 04:42 PM	#4 (permalink)
garrett 1.8L Car: 93 impreza/95 v2 sti Fav Mod: motor My: Subaru Parts Join Date: Sep 2009 Location: norcal Trader Rating: (0) Posts: 26	so what would be a good amount of boost for this motor, like will it run healthy on 1 bar, or with higher fuel pressure or injectors is it safe to take to to 1.5 bar or more around 17 18 psi. im just trying to weigh my options for how i should set the car up to run reliable with around 280-300 to the wheels

10-04-2009, 05:55 AM	#5 (permalink)
attyjdgn 1.8L My: Subaru Parts Join Date: Sep 2009 Trader Rating: (0) Posts: 19	It can run up to 1 bar then the fuel cut kicks in, therefore i would assume any boost over 1 bar is unsafe, unless maybe you upgrade injectors and/or fuel pressure coupled with an ecu.

10-08-2009, 01:12 AM	#7 (permalink)
garrett 1.8L Car: 93 impreza/95 v2 sti Fav Mod: motor My: Subaru Parts Join Date: Sep 2009 Location: norcal Trader Rating: (0) Posts: 26	what tunning and ecu options do i have with obdI all i see is tunning for obdII?

10-08-2009, 01:29 AM	#8 (permalink)
garrett 1.8L Car: 93 impreza/95 v2 sti Fav Mod: motor My: Subaru Parts Join Date: Sep 2009 Location: norcal Trader Rating: (0) Posts: 26	i have also seen someone do a usdm wrx ecu swap, is this hard and why not the usdm sti ecu?

10-08-2009, 01:30 AM	#9 (permalink)
garrett 1.8L Car: 93 impreza/95 v2 sti Fav Mod: motor My: Subaru Parts Join Date: Sep 2009 Location: norcal Trader Rating: (0) Posts: 26	a good plan to me seems like usdm ecu then piggy back it with something like the cobb access port. but i dont even know if this is possible just sounds good

10-08-2009, 09:28 PM	#10 (permalink)
attyjdgn 1.8L My: Subaru Parts Join Date: Sep 2009 Trader Rating: (0) Posts: 19	I'm getting a mapecu2 for mine. It's being shipped now as we speak. check it out at mapecu.com

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