BenHar Posted June 21, 2019 Share Posted June 21, 2019 I am the proud new owner of a 1997 Subaru Impreza 2.0 GL AWD. It is a standard British specification, I think. Therefore should be 113 bhp. I see from looking at https://en.wikipedia.org/wiki/Subaru_EJ_engine#EJ20 that there is possibly another engine version with 133 bhp. What is the difference between these engines? Is there a way to extract the extra 20 bhp from mine easily? Thanks Ben Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted June 21, 2019 Share Posted June 21, 2019 I may well be wrong as I'm not up to spec on the n.a engine range , unfortunately but is the 133 hp version still single cam ? As I wouldn't have thought that you'd gain 20 hp on a n.a by just adding bits from another engine or doing breathing mods . Saying that I think some of the later dohc 2ltr n.a engines have almost 160hp, so maybe a later 2ltr 16v na engine might be the answer for more power but keeping it n.a . Most people will just say to improve performance on a na, concentrate on handling ,lightening and braking mods to get the most out of the boxer low center of gravity and the AWD system. Then save for a turbo version Quote Link to comment Share on other sites More sharing options...
BenHar Posted June 21, 2019 Author Share Posted June 21, 2019 I was just going by what was shown on the wiki page I linked to. Under SOHC NA for Impreza it shows: 1993-1999 135 PS (99 kW; 133 hp) GC - GF series and: 1994-1999 115 PS (85 kW; 113 hp) GC, GF series It also shows 1993-1999 135 PS (99 kW; 133 hp) BD - BG series( ECU code EURO ,D3 ; Asia 4H) under Legacy. I'm trying to find out what the difference is. Thanks Ben Quote Link to comment Share on other sites More sharing options...
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