Originally Posted by
vroooom ptssssh
In any other circumstance i'd say you were probably correct! But seeing what I have, I have no faith in them AT ALL no matter who rebuilt them!
One example...guy buys brand new bottom end from SUBARU, fits it into car, drives it to run it in for 2K miles, first time he boots it (standard car) the bottom end seizes! he was VERY perticular with this engine as he blew up the last engine and couldnt afford to do it 3 times!
example 2, well known subaru engine builder from this neck of the woods, builds them all day long, but 1 in say 20 engines, the bottom end seizes...he cant explain it, and nor can anyone else!
I dont believe it's anything to do with mapping or who's mapped it, its a bearing...mapping doesnt effect it!?
I've yet to find someone who has a reasonable explanation for why it happens on subaru's, i've 'heard' some people say its detonation related...but do you believe that? all I Know is I cant diss-regard it...
Can't explain what you've mentioned in the first few paras as I've had no experience of anything like that.
There are a few reasons people talk about. On the classics, there is the theory that the standard bonnet scoop becomes useless after the 100mph mark, so prolonged high speed runs will obviously be a bad idea, resulting in knock.
Then there's the lack of mapping with bolt on mods, again knock being the issue.
There are a few more 'commonly known' reasons, but I can't think of them off the top of my head because it's been a while since I owned a Subaru and had it tuned, therefore I haven't had to think about them recently.
Would have total confidence with a car mapped by the likes of Andy Forrest though, if all the supporting mods were sound. Just my opinion though as I haven't been stung with engine failure.