Originally Posted by
pa_sjo
You shouldn't get any additional power really (without seriously compromising reliability).. an RS500 T4 is flat out at 480bhp on a YB and going above this just reduces its service life.
flat out at 480 ! wouldnt have thought so !
rainbums old t4 engine which was about 510 ish IIRC
t4 is flat out at about that ^^^^^^^
and this still did loooooads of miles so i think 480 is a bit low
