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Old 09-16-2008, 04:30 PM   #10
ciper
Scooby Guru
 
Member#: 15543
Join Date: Feb 2002
Location: san francisco, ca
Vehicle:
90BJ Legacy LS ABS
AWD 946 Rio Red Jpn built

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If I may speak for the OP for a moment, no matter the engine platform he will need to remain turbo. Remember aircraft reach high altitudes where the air pressure drops. Every 10k feet is like 2/3 the power at sea level. A low boost turbo will keep the engine from "leaning out"

I think the most important question is "What engine management will he be using"
If he can go aftermarket my vote goes for EJ20 since they are a dime a dozen.
My second vote goes for an intercooled low boost EJ25. A 99+ ej25 will probably already make 170hp since he will mount a custom exhaust and even 18psi manifold pressure (+4 over sea level) would probably put it near 200 with an intercooler. The RS25 guys have plenty of experience turboing the EJ25 before the 04 USDM STI came out.
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