[Cobvs]

What determines KW output? Simple question and answer maybe but let me ask it in light of Botswana Traveller's conversion to GTO motor. I understand that a 3.5 or 3.0 for that matter with DOHC and 24 valves will have more power (kw) than 12 valves SOHC.
What makes the GTO produce 165kw against the 125-130 odd kw of the 3.5 24 valve however or is there info I am missing about the GTO motor.

Also 4EPajero mentioned that it was a performance motor (210Nm). What determines the torque on a motor, engine man or gear ratio or both?

[Mcnoogle]

...against the 125-130 odd kw of the 3.5 24 valve ...

Hi Cobvs,

I cannot help you with this, there are many others that will be able to though,

I just wanted to point out, that I have a 3.5 V6 24valve, and its rated at 153Kw.(standard)

[Cobvs]

Thanx McNoogle. 153KW thats cool. My 3.0 V6 is at best 109KW so quite a big difference. Anyway I know the question is a bit general but this just makes it more interesting. 153 against 165 of GTO motor. Over a Sunday lunch I heard a story of the Toyota Prado putting out 15KW more than the Toyota Hilux bakkie with the same engine and apparently no one knows why?

Just curious.

[RoelfleRoux]

It's all very simple:
Get air into the cylinder, mix in some fuel, add a spark to initiate an explosion and the piston is forced away from the explosion. The bigger the explosion, the more force available to push the piston away with.

The secret of the modern engine is the design of the plumbing for the air on the way in, then the valve and valve gear design to allow the best airflow and swirling to mix the fuel better and then ofcourse the fuel injection, and the electronics behind that, to optimise this whole process. The exhaust plumbing design plays the final role in getting rid of the exploded gasses to allow the next batch in again. Fitting a blower in the inlet tract enhances this whole process even more.

The result of the modern engine design means that the little 1400 Corsa, that AVIS charges me an arm and a leg for, has the same Kw output as my dad's big straight six Valiant in the 60's.

[Mcnoogle]

Over a Sunday lunch I heard a story of the Toyota Prado putting out 15KW more than the Toyota Hilux bakkie with the same engine and apparently no one knows why?

Just curious.

Well, keeping in mind that I'm even near to being an expert, Blister and myself were discussing the role the MAF sensor plays regarding power & fuel consumption - basically his mechanic did a test, replacing Blisters MAF sensor with the sensor from his own colt bakkie, and put the one he removed in his own bakkie, result - Blisters Pajero was all of a sudden, a lot more powerful, while the bakkie decreased in power, and increased in fuel consumption.

Yet, according to the Pajeros computer, there were no warning lights or anything to suggest that the MAF sensor isn't working properly.

Your story with the Prado/Hilux, could be the same situation.

[Cobvs]

MAF sensor?

[Mcnoogle]

Its the sensor that measures the airflow/volume, sits on the air intake, just before it enters the fuel injection system if I'm not mistaken.

[tonton]

MAF sensor?

MassAirFlow Sensor:
http://en.wikipedia.org/wiki/Mass_flow_sensor

[tonton]

"SNAP"!

[Mcnoogle]

"SNAP"!

AWESOME, it seems I'm learning something (Thanks POCSA) learning one thread at a time