Turbo dyno!
With this weeks holiday from my thesis, I finally got around to dyno the new engine!
To get the most out of the 3 runs usually offered by Van Vught, I did a first run on 0.9bar (178whp@324Nm), a second one at 0.6bar (173whp@300Nm) and a third at 0.3bar (147whp@239Nm) to see how the chipset does on different levels.
The car ended up making a little less than the US run on the chips (although within 5whp), possibly due to the reduced timing 95RON tune I used. The lambda reading down below were taken from the tip of the exhaust, and showed values that I don't quite trust, those will have to wait for confirmation by a downpipe mounted lambda. I might also get into a set of diy knock headphones, just to check if its pulling timing and going rich as a result.
On the LPT 0.3bar wastegate run it made at least 10hp more than the volvo spec, and the same for the HPT 0.6bar run, showing me that the light port and to 8.7->9.3 bumped compression did increase the engines efficiency. We also did a additional run to see what the 13c did at 1.0 bar, but this made less power and torque, showing the drop in turbo efficiency. Given that the turbo kept pulling up top, the limit was not in the exhaust/turbine side from what it appears, as noted by the tuner at VVT.
Before the dyno when checking over things, I found this little bugger, which caused my stalling and flutter issues. Apparently I accidentally put the good one in the shelf turbo, so that was an easy fix. I also previously added a 10lb spring from kinugawa, to make sure it kept shut at the raised boost levels.
I also finally got around to fabbing up a strut brace, starting with a bit of fire and this nice thickwall tube, to get a few bends going
Made up a few cups to connect to the strut tops
And decided on some support bracing, such that I could still access my fluids
A bit of welding, cutting and not taking pictures later
Installed after a bit of black. It does wonders, much less chassis flex, and a lot faster steering response, well worth it for the time it took