Basically the decider on how much hp you can make out of a given engine is the ultimate pressure ratio (similar to the compression ratio but not the same thing), and the temprature of the combustables (oxygen and fuel) at their ultimate point (which happens just after Top Dead Center during the combustion process), and the fuels resistance to detonation. This means that for say 250hp an engine with a higher compression ratio would use a lower boost pressure. They would be the same as on other vehicles, though changing the distance of the catalytic converters from the engine might make it not pass inspection, specifically moving them farther away from the engine.Ĥ.The higher compression ratio just limits the the amount of forced induction you can have, not necessarily the desired ultimate power output of the engine. At the same time since the engine basically sits on top of the front crossmember and the exhaust ports are on the bottom putting on an exhaust header might be a bit of a pain as well, however the factory exhaust header LOOKS to be pretty decent.ģ. However since it is a boxer engine things like spark plug changes, and head gasket replacement will be a bit of a pain in the bottom.
It should be fairly simple to repair, as it uses ODB II which should aide in diagnostics if you have a reader. This engine in particular is likely more reliable than some other direct injected engines because it also uses port injection which will help keep the intake valves clean.Ģ. a Boxer engine is fairly reliable partly because it has good primary balance and excelent secondary balance. I would love answers to these questions thanks in advance.ġ. being that this car has a high compersion ratio how safe is it to turbo, supercharge, or even nitrous?
#D45 BOXER ENGINE MODS#
i would love it if someone with a boxer engine would answer some questions i have b4 i plop some money down for this car.ġ.how reliable are these engines, and what are the problem areas?(i know subaru has a whole ad campaign about how reliable their cars are but what are the gremlins)Ģ.how easy are they to work on? my first car was a v8 camaro and i loved wrenching on that thing it was so simple and easy to do repairs i would hope sometimes that it would break just so i could fix somethingģ.what are basic mods that would not void the warranty and how much power do they add (on a subie)? ie like exhaust and intakeĤ. So im super excited about this car and i love that its using a subaru engine, but i have no knowledge of these engines.
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