tractive effort to Newton Meter

[Ben-e-boy]

Hi.
Does any one know how to convert tractive effort to Newton Meter. I have found an equation online but the answer it gives me (using figures from the old tune) gave 90Nm LESS than factory NA which has to be wrong.

Cheers
Ben

[MudRunnerTD]

Nah it's cause you bolted up a pi55y little turbo! Need a real tune ;)

Got nuffin

[MudRunnerTD]

Try one of the online converters Ben. I'd go google for sure

[MudRunnerTD]

Does this help Ben

http://performanceforums.com/forums/showthread.php?67116563-How-to-convert-Dyno-tractive-effort-into-Nm-the-wheels

[MudRunnerTD]

Think is is better maybe, sorry on the iPhone mate

http://www.skylinesaustralia.com/forums/topic/79685-convert-tractive-effort-to-torque/

[nissannewby]

You have about 660-670nm now. Before hand you maybe had 500

[Ben-e-boy]

Does this help Ben

http://performanceforums.com/forums/showthread.php?67116563-How-to-convert-Dyno-tractive-effort-into-Nm-the-wheels


Think is is better maybe, sorry on the iPhone mate

http://www.skylinesaustralia.com/forums/topic/79685-convert-tractive-effort-to-torque/

Cheers I have tried both of them but they dont even come close to what I would expect

[Ben-e-boy]

You have about 660-670nm now. Before hand you maybe had 500
Thats roughly what I expected,

[nissannewby]

Yeah you need more fuel :p

[BigRAWesty]

Stick your maths up.. Maybe you have gone wrong earlier in the piece..

What unit have you got it to so far?

[Winnie]

Have you had it tuned Benny?

[taslucas]

Can someone explain the difference between the two in layman's terms?

[Ben-e-boy]

Have you had it tuned Benny?
Yep the dyno sheet is in the killer wasp thread.

[Ben-e-boy]

Can someone explain the difference between the two in layman's terms?

Newton Meters is at the flywheel and Newton tractive effort is torque at the wheels as torque is multiplied by gearing

[taslucas]

Newton Meters is at the flywheel and Newton tractive effort is torque at the wheels as torque is multiplied by gearing

Ahhhh, cheers, so it's pretty straight forward. Just like kw and rwkw?
How would one ever measure in newton metres? That would only really be factory specs unless you pull your donk out and put it on engine dyno?
So all dyno figures are in Newton tractive effort torque.

[Ben-e-boy]

Right, so the equation is

TE= (T × R × 1000)/r

TE=2300
T= ?
R=4.11
r=412.5

Have a crack and see what you get

[Ben-e-boy]

Ahhhh, cheers, so it's pretty straight forward. Just like kw and rwkw?
How would one ever measure in newton metres? That would only really be factory specs unless you pull your donk out and put it on engine dyno?
So all dyno figures are in Newton tractive effort torque.

Year pretty much, I think some dyno programs can work out Nm

[Drewboyaus]

Ok, so I get 230. That still seems a bit light on.
Looking at the equation, 2300 seems a bit low if that is the TE number. Based on your ratio (known) and wheel diameter (known) and there is a constant (x1000) the key number is that TE value of 2300.


Tip tip tip......tap tap tap....

[Ben-e-boy]

Thats what I have been getting, less than a factory NA

[Drewboyaus]

Where did 2300 come from?
I've just gone and compared it to the one from that Nissan forum and he's getting 6300 for his TE figure and I reckon that's more like what you should be seeing based on how much power you're making.


Tip tip tip......tap tap tap....

[Ben-e-boy]

Where did 2300 come from?
I've just gone and compared it to the one from that Nissan forum and he's getting 6300 for his TE figure and I reckon that's more like what you should be seeing based on how much power you're making.


Tip tip tip......tap tap tap....

1700 ft lb ( as per dyno sheet) = 2300N

[PMC]

You have about 660-670nm now. Before hand you maybe had 500

G'day Killer-Wasp,

You have to always bring sex into some of your posts! (660-670nm) lol

Regards,

RLI

[PMC]

Newton Meters is at the flywheel and Newton tractive effort is torque at the wheels as torque is multiplied by gearing

Fark, your another one,Ben-e-boy, has to bring sex into the equation. lol

Regards,

RLI

[nissannewby]

Right, so the equation is

TE= (T × R × 1000)/r

TE=2300
T= ?
R=4.11
r=412.5

Have a crack and see what you get

There is more too it than that. It's not as simple as that equation would make it seem. Just do what I did and ask someone smarter :) lol

[Drewboyaus]

A bit more reading and the equation asks for the Torque figure in Kg/mm. How does that affect the final figure?


Tip tip tip......tap tap tap....

[BigRAWesty]

There is more too it than that. It's not as simple as that equation would make it seem. Just do what I did and ask someone smarter :) lol

I was thinking the same.. Your diff ratio is 4.11 but that wouldn't be the figure your after..
You would need to also add in the gear box ratio, sure they try get 1:1, but I think it's a little Off from that..

[Ben-e-boy]

There is more too it than that. It's not as simple as that equation would make it seem. Just do what I did and ask someone smarter :) lol

What does that person have,

[taslucas]

What does that person have,

smarterness

[Ben-e-boy]

A bit more reading and the equation asks for the Torque figure in Kg/mm. How does that affect the final figure?


Tip tip tip......tap tap tap....

Lots, I just used a converter to Nm and its 2.25 lol

[Drewboyaus]

Lots, I just used a converter to Nm and its 2.25 lol

Hahahha......might have to start a new thread "the 2 and a half killer wasps" hahahahh.
It would be interesting to see if there is another version of the equation to be found on the Internet.....


Tip tip tip......tap tap tap....

[Drewboyaus]

I was thinking the same.. Your diff ratio is 4.11 but that wouldn't be the figure your after..
You would need to also add in the gear box ratio, sure they try get 1:1, but I think it's a little Off from that..

Westy, the ratio wouldn't have a big enough impact in the equation on the final number


Tip tip tip......tap tap tap....

[Alitis007]

Is this what your looking for Bene??
34083

[taslucas]

Is this what your looking for Bene??
34083

Yep exactly, now we know how to earn up to %7 with corporate bonds.....

[Alitis007]

Yep exactly, now we know how to earn up to %7 with corporate bonds.....

No you don't, coz you need to register to get the newsletter. BUT i have the link !!!

[Alitis007]

Theres this aswell
3408434085

[Drewboyaus]

Is this what your looking for Bene??
34083

Nice one George! I thought that figure for TE looked too small. Should have sent out an SOS to you in the first place on this one......


Tip tip tip......tap tap tap....

[firm351]

1700 ft lb ( as per dyno sheet) = 2300N

G'day Ben, looking at your dyno sheet you have @1700 lb of tractive effort not 1700 ft lb as you posted earlier so 1700 lb converted to Newtons works out to be 7561.977 N as showm in Georges post.


Is this what your looking for Bene??
34083

Im not sure about my maths but i worked out the conversion from tractive effort to flywheel Nm to be 759 Nm.
Here is the formula i used. Nm= TE/(R x 1000)/r

Nm= ?
TE= 7561.977
R= 4.11
r= 412.5

This is assuming a 1:1 ratio through the transmission.

Hope this helps and hopefully my maths is still ok:smile:

[Ben-e-boy]

G'day Ben, looking at your dyno sheet you have @1700 lb of tractive effort not 1700 ft lb as you posted earlier so 1700 lb converted to Newtons works out to be 7561.977 N as showm in Georges post.



Im not sure about my maths but i worked out the conversion from tractive effort to flywheel Nm to be 759 Nm.
Here is the formula i used. Nm= TE/(R x 1000)/r

Nm= ?
TE= 7561.977
R= 4.11
r= 412.5

This is assuming a 1:1 ratio through the transmission.

Hope this helps and hopefully my maths is still ok:smile:

Fork yeah thanks for that, that makes much more sense

[Winnie]

That's impressive (if it's right) lmao!

[taslucas]

So are you tuning slightly different for Kw at the wheels instead of Torque at the wheels (tractive)? Or are they pretty much connected in a TD4.2 T?

[nissannewby]

That's impressive (if it's right) lmao!

Still needs more fuel :).

[Ben-e-boy]

Still needs more fuel :).

Quiet you,

[nissannewby]

So are you tuning slightly different for Kw at the wheels instead of Torque at the wheels (tractive)? Or are they pretty much connected in a TD4.2 T?

Always connected. Can't have one without the other.