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Impreza is dead *Updated page 5*
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[quote][i]Originally posted by AK[/i] Andy... some 2.5 info from Andy Forrest http://www.andyforrestperformance.co.uk/26911.html Engine Internals If treated correctly a Subaru engine is a very reliable unit. Up to 400bhp is achievable on standard internals on any year of car regardless of STI, WRX or UK. It is however, wise to consider the mileage and previous use the engine has had before planning to tune to this level. Uprated pistons, rods, bearings and gaskets should be considered if higher power and/or track use is intended. This would cost in the region of £1.5K for parts plus the labour costs. For a similar sum you can buy a brand new 2.5 litre complete short engine (block,crank, rods, pistons and bearings). This 2.5 is the short engine fitted to the USA spec STI from 2004. In standard form this short engine has proven itself capable of sustaining over 400bhp. For outputs from 400-500bhp we do however recommend upgrading the std piston to forged units, this typically adds £5-600 All the parts from the original 2 litre i.e. heads, cams, intake exhaust, sump etc can be reused. The 2.5 conversion with a mid sized turbo such as the AFP5/20 makes an incredibly fast car with excellent throttle response. powerstation http://www.powerstation.org.uk [/quote]
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