We now drove on spa francorchamps with the lancia.
But here, when going on the straight we reach 1005 degrees celcius.
So we added more fuel above 5000 rpm.
After a few more times driving we added more fuel, now we only reach 950-960 degrees, but the afr now is at 10.1-10.2, so way to rich, anything less then 11.0 is to ruch, even for a Turbocharged engine.
Also on the straight, the engine didn't go higher in rpm anymore because its to rich. I think we went from 275 hp on the power test bench at afr 11.5-12.0, to now maybe only 230 hp at 10.0, it's really a lot less.
Before going to spa, we tested on the road, and I added some advance in the lower revs, we know have 14 degree advance allready from 3800 rpm or so.
The question now offcours is, what's good and what's bad.
Is the temperature of 1000 degrees to much or not, the engine has a lot more HP, and up to now we didn't have any problems, melted pistons or whatever.
Does it need to be as low as 950 or so, if so, what good be our problem, if we must put it so rich to have good temperature we loose an enormous amount of power, this can't be right.
I don't know people who I am sure of that they also measured the EGT on circuit, and see how it is.
Also when you have not the stock exhaust manifold (what we have), if you have the manifold with equal length and no cast iron, you maybe read lower EGT, but is it really lower at the piston? I'm not sure of that, you can't measure anymore at the same point.
Or will the turbo+exhaust manifold we have give to much backpressure, and causes these high EGT values.
Here a video on spa of it: => http://www.youtube.com/watch?v=PBxIg-dGLBo&list=UUTijJA7kgOIbW5NguCmjlaQ&index=2&feature=plcp