The Toyster and other things.

 'tis a secret!

Oh yes, it would be much harder without the ninja edits 😁

...and it ended with dissappointment.

This is the dyno from today. Made on petrol, 95 octane. 0,7 bar of boost and no boost control activated. The ewg setup does hold boost gloriously though. The notch in the curve is where we pulled a couple of degrees of timing. That could use some smoothing.



Thats 14 whp more than I came there with. I figured that was a good 95 map. Then the troubles began.

First, the car started to run on three cylinders. Compression was good though and it was only a fouled plug. Quick fix since I had brought another set. After that we where going to set it up on e85 and start making some real power. Sadly, there was no good way of draining the tank completely, it was still half full of 95. Disconnecting the fuel hose is a bit tricky on my car. I have a convenient, although slightly crowded connection, but using that without an extension would have drenched the dyno in petrol. We did not want that.

So we drained it with a hose through the filler. We couldnt drain it completely though, some 5-8L remained. After filling it up with e85 it was still only e59. So we had to call it quits for me to return another day.

When that is going to be remains to be seen. I need to run through a couple of tanks of good quality e85 and find room in my rather compact work schedule. The tuner is only availiable weekends, and I'm often on call on those.

Well well. All in all, I learned that if tuning for dual fuels, do it in two different sessions, preferably some time apart. To tune on e59 would have been hell to get safe and right with the interpolation between the 95 and e85 maps, it would also have netted me less power.

At least it did not explode.

226 ATW Iisn’t exactly shabby though. I’m nowhere near that & seem to really piss off a lot of supposed quick cars in the speed championships that I compete in...... I can keep up with my friends Countach easily at & he loves that!! Considering I paid 1/200 of what his car is worth.....
BTW are you sure that’s you’re 6 secs to 62(100)? I’m 5.6 secs on the datalogger with much less HP & grip, but it’s 60-120 mph where the MX5 seems to really take off.

Interesting what you say about the 2nd - 3rd gear change. I was contemplating a 6 speed box but because of the short 2nd gear with my 4.1 diff, I didn’t think it was worth it, especially on hill climbs that aren’t that fast & being able to hang onto 2nd can help to not change gear sometimes works better with the slightly longer ratio of 2nd in the 5 speed.

Just been out a few hours tuning closed loop boost control.
I learned that its stupid to take shortcuts.
I just used the initial bias table from my last setup, big mistake. I've been checking how well overboost works something like a hundred times, not getting it to be consistent on transient throttle and high revs.
I will be tuning open loop all over again to get those values in the initial duty tables.

note to self, there is no shortcuts in ms3 boost control.