Subaru Engine Conversion Wiki, Let's compile all the knowledge into one thread... |
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Subaru Engine Conversion Wiki, Let's compile all the knowledge into one thread... |
JRust |
Oct 23 2010, 09:26 PM
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#2
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914 Guru Group: Members Posts: 6,310 Joined: 10-January 03 From: Corvallis Oregon Member No.: 129 Region Association: Pacific Northwest |
I'd like a link or someone who knows the subaru drivetrains to give a breakdown on the motors. Basically the HP in stock form & the benefits of each motor. REally considering a subaru swap at some point. Would like to keep an eye out for a good setup. I will hit up some different subaru forums. Figured this might be the place to have the breakdown for the motors though (IMG:style_emoticons/default/idea.gif)
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DukeTrout |
Feb 14 2011, 01:06 PM
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#3
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Newbie Group: Members Posts: 10 Joined: 18-January 11 From: Oregon Member No.: 12,609 Region Association: Pacific Northwest |
This is a late reply, but I thought I'd chime in.
I'm coming to the party as a Subaru guy with an extra EJ25 engine sitting in my garage, looking for a chassis. Since you're in Oregon, you have a lot of great Subaru resources close to home. When you're ready to have the engine talk, I'd suggest Cobb Tuning Surgeline up in Tigard. A stock EJ25 engine is good for just under 300 whp (AWD) and ~325 wtq with a medium-sized turbo and a good intercooler and exhaust setup. Running it 2WD drops the driveline loss from 24% to ~15%, so more like 325 whp. Tuning with E85 can also help, both in terms of torque and turbo spool. A mildly built engine with forged pistons can put out 300-400 whp in an AWD Subie. It all depends on how big of a turbo you want to run and how much lag you can stand. Again, if you have the fuel pump and injectors to flow enough fuel, E85 can really be a great fuel for these engines, better than race gas. For example, in my daily driver Legacy GT, with a tune for 92 octane pump I can get 290 whp with 310 wtq at 18 psi boost. With E85, the tuner can tune it for 21 psi boost, 310 whp and 350 ftlbs. The torque curve also shifts about 700 RPM to the left with E85, due to quicker spool. I'm not sure what else it affects in a 914 build, but the Cobb AccessPort is the go-to ECU programmer for the Subaru folks. If you're keeping the Subaru ECU connected to the engine, the AP might be the way to go. I'm not sure what needs to be deactivated in the Subaru ECU to allow it to run just the engine (probably a lot) but it might be easier than building a tune from the ground up with an aftermarket ECU. I'd like a link or someone who knows the subaru drivetrains to give a breakdown on the motors. Basically the HP in stock form & the benefits of each motor. REally considering a subaru swap at some point. Would like to keep an eye out for a good setup. I will hit up some different subaru forums. Figured this might be the place to have the breakdown for the motors though (IMG:style_emoticons/default/idea.gif) |
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