Rolling road graphs
Rolling road graphs
Author
Discussion

LordGrover

Original Poster:

34,164 posts

241 months

Friday 4th September 2009
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Looking for comments and opinions on what's going on please... Crazy Horses has kindly reproduced my charts overlaying last years and this years graphs.




  • Peak torque is down by 20 ft.lb, comes in higher, earlier and longer.
  • Peak power is down marginally but again, lasts longer into the rev range.



  • Seems to be running rather leaner this year.

5.0ltr

2,834 posts

228 months

Friday 4th September 2009
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LG. Did you know C/Horses had a different set up this year from last? All too techy for me, but meant to give a more accurate reading.

rev-erend

21,620 posts

313 months

Friday 4th September 2009
quotequote all
Looks all but idential to last years .. dyno's are not a precise science. To do that you have to have precise control of :

Air Temp
Humidity
Engine temp
Tyre Temp and pressure
engine temps

But if the AFR reading is correct - perhaps you have a partially blocked fuel filter / under performing pump / incorrect fule pressure (under)..

v8 racing

2,064 posts

280 months

Friday 4th September 2009
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Sorry to be honest i have only just been told about your email you sent me from a month ago! anyway!

To be honest it looks to me like for some reason the car was running to rich from 2008 and now it is looking kind of ok still a tad rich, but they may explain the difference in power!, plus as mentioned rolling roads can vary from day to day let alone year to year! the reality is how does the car perform?

Ant.

5,254 posts

310 months

Friday 4th September 2009
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The graphs look fine to me ,































Just a bit underpowered............

Boosted LS1

21,200 posts

289 months

Friday 4th September 2009
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It's not revving very high either. I'd have thought the revs would have carried on higher up the graph thus increasing bhp.