The car was on the track this sunday with 33 degree C temperature outside.
It was a really hot day.
The car run all the day with 0.4bar max and WOT AFR set at 12.
All was really great, the old E30 was able to compet with more modern BMW V8 and M2 than are more than 400 HP ...
With a short final gear and a really good driver ... the low boost M50 had quick the ass of these expensives cars.
What we have to improve :
_ the waste gate is really too slow to open, this push us to limit the pressure to 0.4, otherwise the boost rise 1bar when the turbo is charging around 2500 rpm. we need a turbo boost management.
_ the oil temperature is reaching 130° (MOTUL 300V) probably need a radiator
_ oil catch tank is filling quickly, we think this come from worn valves gaskets.
_ dynamic air filter will probably help to get fresh air in the turbo inlet.
we have remove 1 front light, but this will probably work better with an optimized input shape.
_ the maf is over his maximum limit, anyway the AFR is stable.
I just worry for this winter, ecu will not see the difference.
_ we want to push to a stable pressure of 0.6 bar, but we don't know if this will be realiable for a track use. we already tested it, but on the road the way we push the engine is limited to few secondes.
i think it's not really necessary to improve much the scaling of the maps.
AFR are really stable now over the rpm, as we also have decrease the fuel pump pressure to 50 PSI. More pressure request a more precise map between each points on the fuel tables, this is the same problem if you increase the injectors size, you need to have better precision, what is really not easy with the standard tables size.
So for bigger injectors than what we have here, i think re sizing the whole maps will be a must.
idle work perfectly well, as the inlet manyfold have no leak ... and this is the hard part of the story.
On the track the engine is runing between 5500 and 7000 rpm.
Consumption was 40 liters/100 km.
We still have to go to the dyno and see what we can improve on the igniton maps and acceleration maps too.
olafu wrote:
Those knock maps are somewhere in SRAM, one map for each cylinder. I don't know how big they are. I'm planned to find them by running ECU on the test bench and by tuning knock limits...
![Rolling Eyes :roll:](./images/smilies/icon_rolleyes.gif)
INPA can continuously poll RAM or ROM max. 30 bytes at time. It shows data in HEX.
Did you try some external " knock detector" like the KS3 ?
I wonder how this could work properly, because the original ECU use 6 differents maps as filter of the frequency and shape, probably because the way the sound arrive to the sensors is different from one cylinder to another.
I don't know if there is a way to use tunerpro and the Ostrich 2 to get a tool with some kind of bar graph, but the great point should be to have the real filter from the ecu, and to be able to really see what the ecu is seeing in live mode.
Thanks for your helps guys, next post will be after the dyno session, i think.
It's time to work on the details to understand the last points.
we are really happy to make this car running !