27-04-2012, 09:35 AM
200hp should be easily obtainable with a bit of noggin usage... No reason 250hp couldn't be seen, it's purely the strength of the engine that will hold you back...
You're just going to have to be very careful with timing and boost to begin with... The XUs in general have a pretty good combustion chamber design that resists knock well...
First thing you need to factor is a wideband O2 - essentially if you don't have one, don't bother tuning a petrol, you haven't a clue what's going on! If you can get Exhaust gas temperature as well, do it, you can pretty much instantly tell if there's something up with the engine and you're not noticing it...
Oh, and get a decent fuel pump - Bosch 044 inline - that way you know you're not going to destroy the engine from running it lean because the pump can't cope.
You're just going to have to be very careful with timing and boost to begin with... The XUs in general have a pretty good combustion chamber design that resists knock well...
First thing you need to factor is a wideband O2 - essentially if you don't have one, don't bother tuning a petrol, you haven't a clue what's going on! If you can get Exhaust gas temperature as well, do it, you can pretty much instantly tell if there's something up with the engine and you're not noticing it...
Oh, and get a decent fuel pump - Bosch 044 inline - that way you know you're not going to destroy the engine from running it lean because the pump can't cope.
