RWHP for Stock Boxster
#1
Rennlist Member
Thread Starter
RWHP for Stock Boxster
Anyone have any good dyno numbers for rear wheel HP for different Boxster models and years from '96 thru '08 and for the Boxster S from 2000 to 2005 in the stock configurattion?
Or what the typical HP drop is from the Factory reported flywheel HP to the rear wheels for a Boxster and Boxster S.
Thanks.
Or what the typical HP drop is from the Factory reported flywheel HP to the rear wheels for a Boxster and Boxster S.
Thanks.
#2
Race Director
Chassis dyno numbers prone to error. Relative mostly when ...
Anyone have any good dyno numbers for rear wheel HP for different Boxster models and years from '96 thru '08 and for the Boxster S from 2000 to 2005 in the stock configurattion?
Or what the typical HP drop is from the Factory reported flywheel HP to the rear wheels for a Boxster and Boxster S.
Thanks.
Or what the typical HP drop is from the Factory reported flywheel HP to the rear wheels for a Boxster and Boxster S.
Thanks.
Advertised HP numbers (published by factory) are better. RWHP will of course reflect whatever HP at flywheel factory posts.
Roughly, drivetrain accounts for 15% loss from flywheel to rear wheels. But transmission types (manual vs. auto (slush box) and efficiency of drivetrain affects this some as well. (Also, how well the car is attached/held in place on dyno. In some cases if rear end pulled down too much this causes deflection of the half shafts and this deflection extracts a HP penalty. Ideally, the halfshafts want to be parallel to the ground so the losses from the halfshaft constant velocity joints/bearings is minimal.)
Several UK car mags devoted to Porsches run a section on all Porsche models, including Boxsters, every month listing among other things the HP numbers (factory numbers). This is a good reference to see/compare year to year HP increases.
Sincerely,
Macster.