An interesting discussion i have to say (maybe need its own thread?)
I'm not actually sure what the ring gaps are on the 2.0 pistons and the 2.5? so you may have a better understanding than me on that.
The material is the same as the 2.0, (cast hyperwhatever since 2003) on the 2.5 so unlikley to be an issue i would say or it would have cropped up on the 2.0.
Headgasket failure could be the symptom rather than the cause, Overboost lifting the head maybe, although given wrx's and sti's are failing and stock cars i dont think thats the reason.
Heat is def a big issue. the 2.5 def runs hotter than the 2.0. But im not sure it would be enough to cause the issues.
It could well be a combination of all of the above 🙂
What are you trying to achieve? the ecu controls everything, no need to run anything else untill you get to the point of running big power.
All this bolt on crap is a waste of money and half the time damages the engine.
Yes mate, tein flex z, although the side on pics are when it had the pedders. Sits pretty much the same. I'll try and get some up to date pics tomorrow, although its ditched at the min lol
blob was 04/05, hawk 06.
But thats just when the paperwork is sent off to the DVLA. short version is a 2005 spec car on a 2006 plate.
Nothing to worry about. if you ever need parts just say its a 2005 wrx
good to see one being pulled back from the brink.
Also a good example of how the arch rust is alot worse below the surface compared to what you can see