Rev limit on 210hp Duratec

[Richard_420R]

Hi,

I keep hitting the limiter as I'm expecting it to rev out to 7600-7800 but seems to cut at something like 7300 in second,  it's a 2019 420R and weirdly it seems to get to more like 7500 in third so was thinking it might be damping of the needle making it lag.  However the cut off is pretty quick after the shift light (I have the single red one currently) comes on.  I was thinking of asking Oakmere to check the ECU next time I'm there ... have people seen them set up with a lower limit or is this likely just damping or inaccurate dial?

Rich.

[aerobod - near CYYC]

Could be damping in the tacho, the only easy way to confirm is to use Easimap to log the engine revs and view the limiter soft and hard cut settings - soft cut is where a random cut is induced to avoid unbalancing the car, hard cut is where all ignition and fuel is cut.

Also, if you have the ACES change-up light system, the control box under the dash should display the max revs reached: https://www.aceserve.co.uk/new04/userguidess.html

[Richard_420R]

Sounds helpful - I'm planning on fitting this soon.  Anyone else seeing a difference between actual revs reaches and what the tacho shows?

[David_Long]

The resolution of the pulse sent to the tacho is very low - once every two revolutions. So that takes awhile to resolve to an RPM figure and lags behind the actual RPM when changing rapidly, i.e. low gears.

[Richard_420R]

All helpful.   As an aside, does anyone know at what revs the single light on the R spec cars comes on?  I guess just over 7k??

 

[aerobod - near CYYC]

I think it was more like 6800 for the first red light by default on my R400 with ACES system, but it is all fully programmable, The start of the first amber LED RPM can be set (Ist Up RPM), followed by the RPM for the last red LED (Shift Up RPM), the other amber and red LEDs are spaced equally in between. The green LED RPM can also be set (Shift Down RPM). You can also select whether all the LEDs flash at the Shift Up RPM. All the instructions are in the link in my post #2, assuming you have the ACES system.

[Richard_420R]

Thanks but I have the single shift light that they now fit on the R spec models rather than the ACES multi-light setup.  It comes on less than 1s before the soft cut in 2nd so pretty close to limit.