Hello?

 

I was going to say I thought the lower figure is more realistic. Double contact patch inflates the losses. I lost virtually all faith in rolling roads ages ago. I thought people would get bored with me banging the same old drum

 

were your tires inflated to a higher pressure?

 

I guess centering the rollers correctly changes things too. I was at Well Lane 5 on Sunday, the first time I've seen a 4 wheel dyno in action and was surprised at the difference moving the rollers made to measured power (I think one of the early cars picked up 20 bhp from a half inch movement). I would guess that most of that would appear as transmission loss?

 

Top post dissappeared - Repost

All,

I've been to a few RR sessions now, & at vaious locations & regularly see transmission losses of around 90bhp for my scoob.

Today, however, the transmission losses were only 67bhp.

I found this surprisingly low...

What are your thoughts?

Chris

268 lbs/ft Torque
210 bhp @ Wheels
277 bhp @ Fly
(due to low load rollers only boosting to 15psi - normally see 17psi on road)

Edited to add :

No Monkey Business with fiddling tyre pressures etc. to try to hike the results