Nissan Patrol 4x4 (Africa)

Peter Connan wrote: ↑06 Oct 2019 22:05 I asked them to mail me all the results, but have not received them yet.

If I get them, i will post them.

I am not sure if relevant, and do not want to open a can of worms.... but should one not also keep tyre size and make in mind when comparing the results?

Thanks for the day guys, enjoyed meeting everybody. Good luck with the rebuild Christo.

Oetie wrote: ↑07 Oct 2019 08:49

Peter Connan wrote: ↑06 Oct 2019 22:05 I asked them to mail me all the results, but have not received them yet.

If I get them, i will post them.

I am not sure if relevant, and do not want to open a can of worms.... but should one not also keep tyre size and make in mind when comparing the results?

Kan ek voorstel elkeen pm Piet sy score en band omtrek.

Apparently wheel size doesn't make a difference to power on a dyno. See here:

and https://www.4x4community.co.za/forum/sh ... ost4144255

What it does do, is to reduce torque at the wheels, but increase speed, and since power is torque multiplied by speed, the power remains the same.

Of course, if the wheels start spinning, then it would make a difference. But that's a different matter entirely.

Here are the graphs for the Patrols (not going to share the other cars' results.

Here are the results of all the Patrols in tabular form:
Note that I tried to take the average of two runs on each car.

I wanted to do a graph of all the cars, but couldn't get it to work. My Excell skills are rather lacking, and it gets way too confusing anyway.

So I did a couple of comparison graphs for discussion.

Firstly, two Y61's. Sort of. Well, Y61 petrol (TB48) versus a TD42T. Specefically, the Turbonator's wheels: Notice how the petrol has a far wider, flatter torque and power spread. But the TD42 has a considerably higher peak torque, and that peak happens to be at almost exactly at120km/h in top gear.

Here is something similar, but a bit of a cheat: this is my car, nine years ago with the original TB42, vs the weekend's result with the TD42. Not the same dino, not the same weather, so not really comparable, but still: Here is a comparison between my TD42 and the ZD30: Similarly to the petrol engines, the newer tech engine has a flatter, broader spread, specifically at higher revs.

And here are two TD42's. NA vs Turbonator: And lastly, all the TD42 Turbos. Hopefully Michael can explain the cause of the differences:

Peter thank you for the analysis and graphs, make some interesting reading.

As for my TD42na..... we will have to do a second dyno day early in the new year....

Sjoe,impressive power and torque!!!

Thys, is that a lumina SS engine (6l)?

Daai is tommie se yster se ou motor weet net dis n groot 8 daai dink 7 lieter . En al daai was wiel krag .

Alex, jou 4.8 maak mooi krag. Hy maak goeie krag teen lae revolusies. Weet jy wat aan daai enjin gedoen was?