Who has had a dyno run on their LR?

You are tuning the engine for peak performance or a particular engine performance profile, it is irrelevant whether that is done in first, second, third, top or reverse. What you have to be careful about is when you compare results done on different Dynos with the vehicles in different configurations.

In this case Ron's and my vehicles are both automatic 4.6 V8s done in second gear, so the results are comparable.

If we were attempting to decide the peak performance to compare about the published data on an XYZ model car then we would have to take the engine out of the Range Rovers and place them on engine dyno's. Hardly real world measurements at all.

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Originally Posted by Scouse

Maybe if you removed the 2t of off road accessories, they might be an even match :wasntme:.

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:D I will look after them for you:D

:D :D

Does anyone know the meaning of the labels BP, RR, and TN at the bottom of the graph?

I assume:

RH= Relative Humidity
AT= Air Temp
IT= Inlet Temp

That nine seconds sounds interesting,,,,

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Originally Posted by Lotz-A-Landies

Grimace

I'm thinking that your vehicle is a manual - @ Cooper's manual gearboxes are dynoed in 3rd and auto boxes in 2nd. According to Ward there is no difference in the engine tuning results just the curve is in a different place.

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Nope mine is an auto.

Also interested to find out what the other labels are.

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Originally Posted by Grimace

Nope mine is an auto.

Also interested to find out what the other labels are.

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I think we need Ward to give us a lesson on the Dyno technique @ Cooper's.

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Originally Posted by Lotz-A-Landies

I think we need Ward to give us a lesson on the Dyno technique @ Cooper's.

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Agreed, I am just curious as I have now seen four other dynos done at Greame Coopers, and all were in 2nd as opposed to mine done in 3rd.

When I do the next round of mods and further dyno tuning, I want to know if tuning in second is beneficial to tuning in third.

Cheers
Anthony

I never gave an update on this.

I went to Davis Performance Landys and they did number of runs and changes. They replaced the exahust down pipes and cats. No change.

In the end it appears it was the new cooling fan viscous coupling (AllMakes) I'd fitted. It was causing the fan to drag too much and taking a lot of power. 0-100km/h time improved by over 5 secs but it's not up to Remy's car. Maybe it's the accessory weight on my car.

One thing that came out of the Davis testing was that Bruce said the ignition timing on LPG was the same as petrol. Now that was unexpected as I understood the dual mapping would provide advanced timing for LPG.

I want to get it re-dynoed by Graham Cooper so I will also ask about that, too.

A lot of the LROC Sydney had their vehicles at a dyno day and GC so if any are members they may be willing to provide their results if they still have them.

Here is mine for my 3.9 RRC ,stock,then stock plus Unichip then , modified heads, then with Thor manifold.

https://www.aulro.com/afvb/

You peak power seems way down. Maybe the cam?

Regards Philip A