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r_towle |
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#1
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Custom Member ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States ![]() ![]() |
So, whats the list of decent motors for a subaru swap?
What is the price range nowadays? If going down this road...is there a motor that can be upgraded to the STI motor over time??? Ideally I would like to figure out if a 2.5 liter legacy motor (or whatever) can have new cams and special head work and become an STI...etc... Rich |
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r_towle |
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#2
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Custom Member ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States ![]() ![]() |
I am still confused...
The US WRX STI motor is not the same as the JDM WRX STI motor? Explain the differences once again between the 2.0 WRX motor and the STI motor... What is a semi closed deck? is the head difference or is the case closed off somehow? Rich |
Todd Enlund |
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#3
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Resident Photoshop Guru ![]() ![]() ![]() ![]() Group: Members Posts: 3,251 Joined: 24-August 07 From: Laurelhurst (Portland), Oregon Member No.: 8,032 Region Association: Pacific Northwest ![]() |
I am still confused... The US WRX STI motor is not the same as the JDM WRX STI motor? Explain the differences once again between the 2.0 WRX motor and the STI motor... What is a semi closed deck? is the head difference or is the case closed off somehow? Rich Nope... USDM and JDM engines are different. I can't give you specifics though... but I believe that the JDM STi is still 2.0 liters. The standard Subie engine has cylinders that are free-standing in the water jacket (open deck). The semi-closed deck on the STi has webs that support the cylinders. I found a pic: http://www.grindstonemotorsports.com/tech/blockdesign.jpg |
budman5201 |
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#4
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Senior Member ![]() ![]() ![]() Group: Members Posts: 595 Joined: 1-April 07 From: tempe, az Member No.: 7,635 ![]() |
Advice from my experience. (on 3rd subie conversion) This time around i am using a US spec 2.5 liter Naturally aspirated engine with free flow intake, free flow exhaust to an extent (dont want to lose too much torque) and delta 2000 grind cams. The stock 2.5 n/a is a blast, this one should be killer too. Yeah if you plan on turboing it later i would recommend going with a closed block due to the head gasket failure porblem when under boost. The STI motor has lower compression pistons so when under boost it wont detonate. But the standard 2.5 n/a motor can handle some boost to bring it up another 35 horsepower if needed in the future. (5 lbs or less boost) As long as you have a free standing computer like my setup (link computer) and you can monitor from your wideband o2 sensor at ALL rpms and loads (dynoed) then you should be fine. (ex. larger fuel injectors with turbo, programmable fuel going into cylinders,etc)
I'll release my dynoed numbers after this conversion....should be nice. (IMG:style_emoticons/default/popcorn[1].gif) stay tuned should be done by end of august with this one! Attached image(s) ![]() |
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