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Old 04-20-2013, 02:03 AM   #1
Scooby Newbie
Member#: 328627
Join Date: Aug 2012
Chapter/Region: NWIC
Location: Seattle area
1994 impreza wagon

Cool Seeking info on EJ207 (JDM v5/v6) performance build for a DD

first of all, i have a 1994 usdm impreza GF8 wagon with a JDM ej207 v5/v6 swap in it. this car has been stolen, and needs new head gaskets. which i am in the process of replacing. but i have major plans for this motor once it is running well and had some questions about performance motor parts, because performance parts are a major bitch to find for this particular generation.

i don't wanna say i'm trying to cut any corners, but the cheaper the better, with out sacrificing quality.

i want to hit 350-380 whp or more (400whp+?), if it is immediately possible after upgrades are installed, via tune or etc. but i would be happy with 350-380 to start out with. for a safe/somewhat reliable daily driving build, i think this is a reasonable build goal. but just for **** and giggles(not saying i want to do this), if i was interested in building this motor to be as powerful as it could be, how much whp could i safely run with this engine if money wan't an issue?

i only really plan to run 91-92 octane fuel, because that's all that seems to be available around the seattle metropolitan area at the pump and i'm not entirely interested in always buying race fuel, as this is my daily driver. i'm looking for any information on performance engine parts including, but not limited to,

-front mount intercooler(was thinking about mishimoto universal? would love some reviews or information on mishimoto, godspeed, perrin, any other affordable fmic set up)

-performance pistons(i think i actually have forged pistons in this gen, but would love info about other aftermarket ones or if i even need them to reach my goal)

-forged piston rods

-performance cams

-exhaust(i already have a Y-valve on my exhaust so i can open it up to straight pipe by the flip of a switch right next to the drivers seat. which is ****ing cool, and i would love to keep)

-looking to do stage 2 clutch(been driving my roommates 05 usdm sti with exedy stage 2 clutch, feels beautiful)

-bigger turbo(running IHI vf-28 stock with my engine)

-performance ignition system

-performance radiator(once again looking into mishimoto, but open to any suggestions)

-fuel injectors(i was looking at these nismo 750cc injectors, but i would love any other information on anything else anyone has done on this engine)

-suspension(rocking stock suspension currently, which is mushy as hell, was thinking about gc8 sti suspension? would that work on a usdm GF8 wagon?)

-i understand that i will need a decent tune with any/all of these parts, i'm currently looking into local performance shops around the seattle area, also open to suggestions on that.

any insight, info, or stories about building the same or similar gen motor are welcome, i'm really just looking for any information at all from people that have done similar projects! once again it's a JDM ej207 v5/v6. thanks for reading, looking forward to any info!

eat, sleep, boost,
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Last edited by spencern; 04-20-2013 at 04:36 AM.
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Old 02-27-2014, 04:50 PM   #2
Scooby Newbie
Member#: 382760
Join Date: Feb 2014

Yeah man you've got a neat setup. One thing to look at is maybe a VF39 or something, also I think that maybe Sti yellow top side feed injectors would be good? Nismo's may not fit well? And yeah your mishimoto FMIC and rad look real good (long time user of mishi) stage 2 clutch a definite for the power you're feeding in. For ignition look at the JDM apexi safc 2. And yeah bigger cams are always nice but I don't about forged pistons cause you already have some...just sayin. But once again I dig the part list.
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Old 02-28-2014, 06:03 AM   #3
Scooby Specialist
Member#: 271525
Join Date: Jan 2011
Location: BagEnd
7/2 STi/WRX wagon


That thread was 10 months old. Let's wait for his reply.
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