there was no difference on andy r's car.his with same set up a mine,same compression ratio,same head,same cam,same turbo,yet his had the ava manifold and was on full boost 2000rpm quicker than mine,so rules manifold out

chip, good example but read above,mine and andys car was near identical at one point,he made 228@wheels i made 214@wheels,only diff his havin manifold,you sayin if he added the t28 on his car without any other changes then could be on boost earlier and full boost quicker than 2800rpm

if so then why does davies not come on boost quicker or hit full boost earlier???
as davies is similar spec bar the turbo

and everyone knows imperial blue is quicker