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Boosting 1990-2002 USDM Subarus: A Chronological Guide
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Old 02-01-2011, 03:00 PM   #31
Jagular 1785
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Subscribed! TONS of good info here that I'm gonna use for my build, thanks OP!
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Old 02-02-2011, 08:16 PM   #32
Micahg
1.8L
 
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I'm very new at this guys.I would like to know if I can do a low compression build with my stock 2000 RS block and just swaping sti pistons and rods.will the rods and piston from an STI fit in my RS block?
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Old 02-03-2011, 05:06 AM   #33
CheatingOnMyDub
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Quote:
Originally Posted by Micahg View Post
I'm very new at this guys.I would like to know if I can do a low compression build with my stock 2000 RS block and just swaping sti pistons and rods.will the rods and piston from an STI fit in my RS block?
Built EJ251(STi internals)- Jrmdb3

is this what your asking?
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Old 02-04-2011, 08:07 PM   #34
Chr1sM87
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Excellent read. What do you think of the EJ22E and EJ25 DOHC combination for turboing OP?
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Old 02-05-2011, 09:17 AM   #35
ImprezaRSC
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Quote:
Originally Posted by Chr1sM87 View Post
Excellent read. What do you think of the EJ22E and EJ25 DOHC combination for turboing OP?
Not sure about that one. My nose tells me you'll have a low compression combination good for up to 18psi. EJ25 heads on anything smaller displacement usually drops the compression A LOT and messes up the quench area a bit. The lowest compression ratio I've heard of on stock parts is 7.8:1 for EJ25 SOHC heads.

I honestly don't keep up with every engine code and combination. Most of what I put here was recalled from memory. A project for you guys might be listing the different combinations and their compression ratios.
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Old 02-05-2011, 05:32 PM   #36
Xise
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Makes me sad I bought an 04 RS, I came so close to getting a Black 01 RS coupe. For starters I need a new intake manifold and pistons.

Also for the 1.8L sohc, are those single port exhaust? or do you use different heads? Do they even make a single port turbo manifold?
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Old 02-05-2011, 05:42 PM   #37
Chr1sM87
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I believe I read somewhere the 1.8's are dual port.
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Old 02-05-2011, 10:58 PM   #38
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The ej18's are dual port
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Old 02-06-2011, 02:51 AM   #39
radhazord
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i have a feeling all this great information is going to come in use for me soon.
good article.
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Old 02-06-2011, 05:36 AM   #40
omiotek
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good stuff!
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