reading torque curve on dyno graph

**naten** · 08-02-2008, 10:43 PM

hey guys,

finally got my car re-dynoed today to check my AFRs are all good.

They are and it pulled a healthy 169kw @ 10psi. AFR started at 14.7 and trailed down nicely as boost came on.

Thing i cant understand is what scale the torque curve goes off? The scale on the right cant be RPM as it doesnt line up with the speed i actually go in 4th (ie at 100kmh in forth im doing 3.5k not 4.5k)

It does have a N on it, but i dont think its netwons...............

Thanks for any help.

Cheers
Nathan

PS car is a ma61 with a 1jzgte. All stock except zorst and front mount.

**3BarSuperstar** · 10-02-2008, 03:14 PM

I think it is newtons from memory. Maybe ask the guys where you got it dynoed!!

**RONA** · 10-02-2008, 05:07 PM

Nm for tractive effort

**naten** · 10-02-2008, 07:32 PM

rona your spot on its tractive effort

found a formula on the net to convert it over to NM

booya!

**big_zop** · 10-02-2008, 07:35 PM

Originally Posted by naten

found a formula on the net to convert it over to NM

Got a link or want to post this up? Would be interesting to know...

**BLACKCAT** · 12-02-2008, 03:55 PM

They ran it in N/A mode instead of FI but will not make much difference to overall result.
Just one of my little pet hates.
Prefer to see the A/F ratios on the graph instead of torque as you can always work that out from the data.

**naten** · 12-02-2008, 06:15 PM

Linky for formula:

http://www.webster-inst.com/techinfo...qnfr/eqn17.htm

Bit more of a explanation:
http://www.skylinesaustralia.com/for...rt-t79685.html

So for my car its peak tractive effort was around 4500
Run that through the forumla it equals 326 ish nm

cheers