Oil pressure datalogging_ECUTEK oil pressure trips

[Mark@Abbey M/S 235]

In the depths of Abbey Motorsport Ltd dyno room we have been working away on developing the GT86?BRZ one of the developments is an Oil pressure trip for these FA20 motor s, nothing new but just needed to developed for these cars. 

It also allowed us to look into the oil pressure on these motors , anyone with an oil pressure gauge will see there is big fluctuation in cold to hot oil temp. 

We have found a few items on the motor that can be worked on to fix these issues also we have noticed that engine revs has an influence with oil pressure. here is a datalog from a built FA20 with Abbey tweaks on the oiling system when run on our dyno this week. 

With the inputted oil pressure into the RaceRom feature of the EcuTek International Ltd software we can add a fuel cut to limit the motor if the oil pressure drops below a calibrated number with a RaceRom map , this allows us to basically limit the car if the oil pressure is below the level we are happy with.we added a delay on the fuel cut happening to allow for transition area's. Something to help look after these FA20 motors when used on the circuits

 

[smudge 1020]

Impressive stuff Mark

[Ade 517]

Nice. Where are you measuring Oil Pressue?

Would be good to log temp vs pressure vs revs.

It's when Oil temps go beyond 130C they start looking scary low, this is compounded if you use a small oil cooler as the radiator itself drops 10-14psi.

[Mark@Abbey M/S 235]

We measure oil pressure in the same position as the stock oil pressure sender unit; we measure oil pressure after the oil cooler we saw approx 4 to 5 psi pressure drop.

Running a 21 row -10 oil cooler.

We put a oil temp temp limp on our Ecutek remap anything over 130deg C the car is RPM limited; give the drivers a good pre warning something isn't right.

 

 

The oil pressure on this motor with the Abbey tweaked oil ways at 100deg C + is very very good , actually has less pressure drop off at the top end than when the oil is colder; We now know thicker oil causes more pressure drop off as well.

 

 

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Edited October 9, 2015 by Mark@Abbey M/S
bad spelling

[Ade 517]

Good stuff

Glad someone is taking oil pressure seriously!

What weight of oil are you using to gather the above data?

[Ade 517]

Just a thought, what happens if mid corner you get a pressure drop due to oil starvation and you are in 2nd gear with your boot down at 6.5krpms?

[Kodename47 446]

Just a thought, what happens if mid corner you get a pressure drop due to oil starvation and you are in 2nd gear with your boot down at 6.5krpms?

It's has a delay before the cut kicks in. Don't worry, these things have been considered

[shiftspark 41]

Hope I am not being daft but I assume this is something that comes with and Ecutec remap or is it an add on ?

Cheers

[Kodename47 446]

Hope I am not being daft but I assume this is something that comes with and Ecutec remap or is it an add on ?

Cheers

ECUtek allows making custom tables to create this kind of features. You would need an analog pressure gauge to be wired in for something like this to be done.

It's a powerful bit of software, toying with the maps is good fun.

Edited October 9, 2015 by knightryder

[Mark@Abbey M/S 235]

The ECUTEK software allows you to feed a 0-5 v signal back into the ECU via rear lambda or CPC inputs, we use this too input oil pressure or fuel pressure then using the powerful RACEROM tools we configure maps to allow low oil pressure to trip a rev limiter if the parameters are below what we want.

[Mark@Abbey M/S 235]

we use a 0-30 W oil in our track car set up anything thicker will cause more pressure drop at high RPM we have found.