Freelander 1 Freelander 1 TD4 rpm at various speeds?

Alibro · May 23, 2024

Hi guys
I'm trying to calibrate the rev counter in my EV converted Freelander 1 so would like to know what rpm you guys see at 50mph, 60mph, and 70mph in 5th gear.
Even better would be if you can confirm the speed from Waze or Google maps as wheel/tyre size effects the speedo. I currently have smaller tyres than standard so my speedo is very optimistic.

I don't need perfection as it is a mile out now but as near as possible would be great.
Any help appreciated

hd3 · May 24, 2024

fl1/td4 :

.. 225/65/17's ..

1750 rpm .. in 5th gear .. 45 mph
1963 rpm .. in 5th gear .. 50 mph
2350 rpm .. in 5th gear .. 60 mph
2700 rpm .. in 5th gear .. 70 mph
2972 rpm .. in 5th gear .. 76 mph

...............................................................
with standard tyres .. am fairly sure 70mph in 5th were 3000 rpm .. as near as ..
i guess you could add 300 rpm to the list ... to get rpm/5th in standard tyre size.
.
btw .. with the 65's .. speedo read spot on with gps readouts ..
.

andyfreelandy · May 24, 2024

Hello, hello, hello. Got some questions about the 76mph m'lad !!!!

Alibro · May 24, 2024

hd3 said:
fl1/td4 :

.. 225/65/17's ..

1750 rpm .. in 5th gear .. 45 mph
1963 rpm .. in 5th gear .. 50 mph
2350 rpm .. in 5th gear .. 60 mph
2700 rpm .. in 5th gear .. 70 mph
2972 rpm .. in 5th gear .. 76 mph

...............................................................
with standard tyres .. am fairly sure 70mph in 5th were 3000 rpm .. as near as ..
i guess you could add 300 rpm to the list ... to get rpm/5th in standard tyre size.
.
btw .. with the 65's .. speedo read spot on with gps readouts ..
.

Thanks mate, much appreciated.
As always with me perfection is not an option but we still try.

pwood999 · May 25, 2024

I thought the later TD4 uses ABS sensors for speed, and sends the CAN messages to the instruments ECU for the display ? If it does, then inaccuracy must be the calibration in the instruments themselves ?

Can you read the CAN messages & compare to a GPS speedo app ?

Alibro · May 25, 2024

pwood999 said:
I thought the later TD4 uses ABS sensors for speed, and sends the CAN messages to the instruments ECU for the display ? If it does, then inaccuracy must be the calibration in the instruments themselves ?

Can you read the CAN messages & compare to a GPS speedo app ?

The speedo work fine and you are right about it getting speed from the ABS sensors, it reads optimistic because I have the Nissan Leaf wheels and tyres on it. They just happened to fit and had good tyres so I figured I would use them for a while until I get new tyres on the Freelander wheels.

It is the rev counter that I am trying to sort as it reads around 3k rpm at 45mph in top gear. The rev counter is being fed CAN by my VCU firmware which is getting it from the inverter but it's going wrong somewhere in the Arduino sketch so I'm trying to figure out where the issue is.

Freelander 1 Freelander 1 TD4 rpm at various speeds?

Alibro

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hd3

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andyfreelandy

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Alibro

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pwood999

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Alibro

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