As per title.
Any one know how much extra speed those 40 ponies give?

 

Not much.

Standard car is good for (according to the Suabru) for 153mph.

Those extra 40 Horse powers will make little difference, as Drag is too great what with the scoop & spolier. Plus, have you taken it anywhere near it's top speed? (private airfield of course ) The scoop & spolier shake so much, you swear they'll rip off

 

I've taken the rear wing off... and I'm concentrating on things a long way in front of my scoop at those speeds.

I thought that the quoted top speed was 158mph for an 06-on STi.. I know that on a private runway once in the early hours of the morning the speedo crept past the M of MPH at the end of the speedo.


Cheers,
Grant

 

on the new newage with aluminium bonnet, have you noticed how far the bonnet edges lift when driving at private airfield speeds.

 

I'm not sure how fast I've gone.
Maybe 130.
Book speed is 158mph (I think), and if this is the case, using the square root of 320/280(bhp) should give a theoretical 169mph.
I gather from this thread, that there is some scepticism on this matter!

 

In theory, if you want to know performance info re 06/07 STi with PPP check out the RB320 Specs.

Having said (typed!) that, the top speed is quoted to be the same as the STi. ie 158mph and they fit 225/45 R 17 tyres onto 18" x 8JJ Rims.

 

on a private road a few weeks back my my06 wrx had more left at 160mph, flat road no down hills, eased of because road started to climb folowed by a left hander.