With a normal 4 pot engine the bore over time will have a bit of wear too the bore iv the cilinder , with a Subaru flat 4 what did Subaru do too slow down this ? Any ideas as been wondering as gravity and would push the piston down and oval quickly .

Another 1 for you i want a unequal length manifold , with my car there is no after market part for it . I want too buy a non turbo 2ltr unequal manifold chop the header off addapt it to a header that fits mine . Or ask some 1 too make me 1 .


Any ideas and help feel free thanks .

 

I too am interested in how gravity doesnt oval the pistons quickly??

Often wondered and it's good to see someone else who is curious too.

 

Iv been chatting too a friend and he says that the bang from the combustion in the chamber is too much for gravity too have any say in it also the fit is so tight there is little movement with it having a bit of pressure and lined with oil there is very little movement up and down . Soo wear on the liner would have too happen over 100000s of miles .

So there it is lol

 

I really don't think gravity will pay any part in this, the centrifugal force will counteract gravity, even at a very low rpm.

 

Yea that's what a mate of mine said mate . Was a interesting question tho . Something iv wondered before .