Saxo VTS drag power

1. pete_ Newbie Joined: Sep 2016 Posts: 2

   #1 27th September 2016, 14:54

   Hi,
   
   I've just extracted power curve from my saxo and what wonders me is the losses curve. It looks like losses are ~55hp and peak power (135hp). Is this value normal? Or is there something wrong in the drivetrain. Here are the dyno curves http://www.imagebam.com/image/248e8d506701403
   
   Any hits?
   
   
   Cheers
2. axsaxoman Saxperience Forum Bum Joined: Jan 2003 Scotland Posts: 3380

   #2 27th September 2016, 16:20

   std saxo vts 120bhp --normally shows around 90-95 @wheels if tested in 4th gear and everything correct
   if you car is std then the 135bhp is not correct --maybe 125 bhp --no more
   
   maybe the dyno is tuned up !!
3. pete_ Newbie Joined: Sep 2016 Posts: 2

   #3 27th September 2016, 16:57

   My saxo has modified exhaust + simota inlet. So the engine potentially can have additional hp. Even though, it shows 80hp at wheels @ max power engine speed, which is lower them std saxo.
4. user_20080 Saxperience Hardcore! Joined: Dec 2007 smurfland. Posts: 17346 Ex saxo owner.

   #4 27th September 2016, 20:37

   More to factor in such as,mileage on the engine how often has the engine been serviced?All of these will have an effect on performance,most engines lose bhp over time.
5. welshpug Saxperience Forum Bum Joined: Jul 2010 South Wales Posts: 3078 ZX 16v, 205 GTI, 309 Goodwood, 405 MI16.

   #5 28th September 2016, 13:55

   quite common to see odd high losses on a double roller type rolling road.
6. Chipwizards Frequent Poster Joined: Nov 2009 Posts: 576

   #6 29th September 2016, 20:04

   Camber, toe, tyre width, tyre profile, tread style, tyre construction, road speed and transmission temperature all affect transmission losses.
   
   As you can see the losses increase exponentially with respect to speed, so if the run wa done in 5th gear the losses are pretty normal for 140mph ish.