Mythbuster: continuing project thread of my 1303 '75

[Wally]

Originally Posted by 70Turbobug

Cool! Am I reading this correctly? 4703rpm and the throttleposition is WOT / 100%?

Correct!

The other 2 graphs are going downwards after that except the throttle-it remained opened?

No, you have to read it from right to left: the car ' drives' from the right to the left, then you see that the rpm is climbing and boost is rising, all under WOT till I take my foot off.
Hope that will make things more clearly?

Sorry...I´m still learning how to read these things.Or ist that just what the peak was?

The vertical line is just a point in time I choose in this example to let the values show. At 280 kPa (1,8 bar or 26,5 psi) boost the wastegate begins to open as boost gradually climbs less from there on. That was about 55 or 60% wastegate duty cycle (not shown or logged). Boost then rises a little further to 1,9 bar (28 psi) but you see the boost control taking boost out and adding it very quickly. Thats the effect of the EBC in action and explains the wavy line at that point onwards.
Hope this helps a bit?

[70Turbobug]

No, you have to read it from right to left: the car ' drives' from the right to the left, then you see that the rpm is climbing and boost is rising, all under WOT till I take my foot off.

Ok now I understand reading from right to left and the vertical line being your chosen point of reference, thanks! Now it makes sense How were your temps and afr at 1.9 bar?

[Humble]

I'm curious to see temps too and turbo response at lower rpms 3k-4.5k (when it starts spooling to max boost). I have to remember to read your logs right to left (backwards btw ) is that a "feature" or an option with your ecu?

Other than that it looks good, you've got me looking at the bw turbos now, specifically the EFR 8374 with a 87mm turbine and .90 a/r for my 2165cc @ 25psi (current boost limit w/o intercooling).

[Wally]

Originally Posted by 70Turbobug

How were your temps and afr at 1.9 bar?

Dude! What do you think is going on in a bug at 1.9 bar boost and 5K rpm on a public highway (german Autobahn)?
I was lucky to check the boost gauge and notice that too high setting at all , let alone watch other gauges

The log direction is stock and non changable...It constantly adds log info to the left, so everything shifts to the right as the log info builds.
Its not that strange if your used to it I guess

I agree, the new high tech BW EFR (engineered for racing) turbo's are the shiznizz! The EFR 8374 would have been my choise as well. Pity the twin-scroll version is not due untill a few months, so we have to wait for real-life results. I think the ultimate hp that that one supports might be close to mine. So, its plenty probably