Blyton Track Day??

[turbonutter]

Had a good time testing yesterday at Blyton, there were only 2 other cars there, so basically when I was on track there was only me there, so I could do what I wanted to

It was wet in the morning, so that was a perfect opportunity to start testing the Traction control, naturally that involved a few spins, but a few adustments got that sorted, and its working well. Initially the control was done by ignition cut & retard, but found that controlling the throttle worked better & the ignition/fuel cut was left in only if the slip wasnt controlled by the DBW throttle changes.

It was also seen that the exhaust was flaming far too much (even for me). I had actually noticed that it was flaming a little too much when I had been driving the car at night- the flame was visible in the mirrors!!! The Over run fuel cut was adjusted & the flame size was reduced to a more reasonable size


It was dry in the afternoon and we got the boost control set up really follow the target perfectly. Also added boost trims by gear.

Very happy with the car now

[LM mic]

Hello Neil
well done !!
That's a really good improvment day and result is at the level the work you did !!

[turbonutter]

There are a few tweaks left for me to do, like setting temperature related rev limits for when the engine is cold or too hot, but thats just a case of filling in the tables...

Also I found the oil temp is a bit high (135-140C) so need to improve the cooling & 2 of the EGT thermocouples have failed, so I need to look at some better quality ones....

OH! and the rear tyres are now without tread!

Checked the plugs today & they all look good....

[LM mic]

Yes !! seems you got the right mixture !!
Oil temp is probably hight because you are using water to cool it ?
is the Turbo oil return cooled with same circuit ?
That can be too another reason to the hot oil temp
On our twin LM turbo ( years ago !) we used to have small air cooler for return oil from turbos

[turbonutter]

Exactly - those plugs were after the days running & a cool down lap - it also seems I have the right heat grade plugs

Yes oil is cooled by water, but the water temp was good @ 80-88C.. Turbo oil return is directly back to the sump - I think I just need an extra or bigger oil cooler. I use Miller CFS oil, which is rated for 125C with peak temp of 150C, so I am just ok with the temps, but would like to be down at 120-125C as a maximum.

[turbonutter]

Well been checking over the car today & decided to check the oil temp sensors....

Attachment 8880

Before the test with the sensors in air - Stack gauge was on minimum (40C) ECU sensor showed 15.5C
With some warm water in the can --------- stack gauge read 62C & ECU 53C
With the water heated to Boiling with a flame, so at 100C, Stack read 107C & ECU 99.2

So at 100C the gauge is over reading by 7% & the ECU is under by 0.8%.

Based on those errors:
When the stack gauge read 138C, temp was 128C
When the ECU read 126C, temp was 127C.

So although high, the temp is in my acceptable range.. There is an option with the Laminova cooler to insert a partial restrictor in the central bypass flow to increase the flow through the cooling channels, so that is something I could try easily...

Attachment 8881

Checking the oil pressure logs with the oil hot, it was 70psi @2500 rpm & 90psi at 6500rpm even at idle (1200rpm) it only dropped to 38psi. So all good there

[strat24v]

I think the idea of blocking the Central core works in conjunction with running it from a smaller diameter feed. Best to do some calls on cross sectional area.