Outer Limits 4x4 Board

From what manufacturers say there cars produce is it at the wheels? has anyone dynod there new hilux, navara, cruiser etc?

Manufacturer's figures are generally measured at the flywheel, before transmission losses.

and depending on the manufacturer it could be at the flywheel with engine accessories (alternator, pwr steer etc) or without engine accersories, which gives a higher (but misleading) power reading.

So anyone got dyno readings?

Gibonator wrote:So anyone got dyno readings?

Dyno readings of what? Permanent 4wd or only part time? With 31" tyres or with 38"? And what ratio?
You have to define more, what you are after.
If you want the flywheel hp, just have a look in the engine specs. The rwhp are anyway useless without all the informations.
But you will find a lot of rwhp dynosheets on this page. Just hava a look in the search.

Hope that help
Chris

Gibonator wrote:So anyone got dyno readings?

RW kW is ricer shit. Totally irrelevant in terms of 4WD's. Keep watching Top Gear.....

DAMKIA wrote:

Gibonator wrote:So anyone got dyno readings?

RW kW is ricer shit. Totally irrelevant in terms of 4WD's. Keep watching Top Gear.....

Dyno curves would be more useful to most Outers members, but only for comparing the shapes of the power and torque curves. The outright numbers (kW/Nm and rpm) aren't really comparable unless all numbers are generated on the same dyno under the same conditions (i.e. pretty much back to back on the same day.)

Disclaimer: Yes. Somebody who knows this stuff inside out can make a reasonable comparison if he/she has sufficient information about the dyno(s) and the ambient conditions. I believe that if the OP fell into this category he would already have access to the information, and wouldn't be asking here.

DAMKIA wrote:

Gibonator wrote:So anyone got dyno readings?

RW kW is ricer shit. Totally irrelevant in terms of 4WD's. Keep watching Top Gear.....

Rwkw only become irrelevant when you dont have enough.

For the op, the last 4wd I had, had around 170rwkw on 35s. Lots of fun.
The ute I have now probably has around 80rwkw. Boring...

Old saying
UNDERSTEER is when you hit the wall with the front of the car. OVERSTEER is when you hit the wall with the rear. HORSEPOWER is how fast you hit the wall. TORQUE is how far you take the wall with you.

05- Hilux about 70

1 KW = 1.34 HP

Rule of thumb is HP at the wheels = KW at the flywheel. That's very generalised but close enough. You generally lose about 1/3 of your engines power through drivetrain losses.

In a way i was more interested in how manufactures rate there cars. nissan navara d40 is rated at 126 from factory, if you chip it you get 145kw.

Lets say you have a 350chev, standard they put out about 100kw Do heads and cam all suitable for offroad and towing and you will get around 155kw to make it similar to a navara.

So in theory taking power to weigh etc it should be a even race?
Or will the torque of the diesel out run the chev?
Or will the extra revs out run the diesel?

Guess it comes back to torque/kw or HP?

So in theory taking power to weigh etc it should be a even race?
Or will the torque of the diesel out run the chev?
Or will the extra revs out run the diesel?

Guess it comes back to torque/kw or HP?

It has more to do with the shape of the curve for power and torque vs rpm/speed, rather than nearness of the peak values.

Torque - Nm is far more important than horsepower in a 4wd. If all you are worried about is horsepower buy a car.
Your conclusions are flawed as too many other variables come into play. Figures tend to not always mean much in the real world.



brooksy