Year got a slow start with the lock-down. 2021 auto registration only arrived at end of June, almost 4 months late.
Much needed oil change after Autobahn runs. I was worried the Liqui Molly 10w60 oil will be cooked and lost its lubricating properties, due to extended hard runs on the Autobahn and over 10,000km on the oil. Turned out the oil was looking surprisingly good for the km/miles driven and the oil filter (after careful examination) was empty of debris or metal particles.
Getting the machine ready to install ESS Supercharger @Driftdarbnīca, Riga, Latvia. ESS install means first doing rod bearings, and major engine overhaul. To get understanding of before and after Supercharger results, went and Dyno’d the machine at Dyno Systems, Riga Latvia on a Superflow Dyno, showing 379HP DIN @ crank (full info on the bottom of the page).
Meanwhile @ Driftdarbnīca, Sergej Ananic was busy assembling his S62 for his BMW Individual “1 of 7 Atlantis Metallic” M5 E39 Touring Wide-body ESS Supercharged. The engine was completely apart to lowest common denominators just two weeks ago, and in 15-16 days of work, Sergej with help of Maris Rungis @ Driftdarbnīca, managed to fully assemble the newly sleeved, balanced crank/pistons/rods motor, ESS Supercharge & Dyno tune.
I showed up (late as always), but at least managed to film (and catch some of the emotions) of the final assembly, first start and dyno tune.
Note that the dyno was to check AFR’s, etc., and tune, not for power output testing. That will come later once the engine has been broken after the road trip.
Dyno’ed the M5 E39 before supercharger install. The car has 182,000 miles or 292,000 kilometers on odometer.
ABS and DSC fuses 17 and 30 in the trunk were not pulled.. and 4th gear was used, while 5th gear is the direct gear.
The motor dyno’ed at 379hp on Superflow Dyno.
In regards to WHP, the machine dyno’d at:
318.72 SAE (USA) WHP
323.15 DIN (Euro) WHP
The video shows max power moment @ 6580RPM, the Wheel Torque @ 344.9NM which is 254.4 ft lbs.
Then taking the imperial measurement system (ft lbs) way of calculating WHP from Wheel Torque and RPM:
EngineTorqueFootLBS times RPM divided by 5252: 318.72 HP SAE
SAE HP to DIN HP = x1.0139
318.72 SAE WHP x 1.0139 = 323.15 DIN WHP
The only sensors replaced in last 150,000 miles are MAF. Everything else is original and no other performance improving mods have been done to the motor.
The oxygen sensors were reading a perfectly steady 1.0, meaning no compensation was necessary and engine/systems were working perfectly on all 5 dyno runs.
The 379hp max power were achieved at 200.5km/h @ 4th gear and on 5th dyno run, as the stock cats needed to be heated up and each consecutive run gave better readings. The ambient temp outside was 16c and inside Dyno shop about 20-22c.
The car lost ~20hp in last 182,000 miles/292,000km- down from 400hp to 379hp. 5% loss in almost 300,000km of hard driving.
Overall I’m satisfied and right in-line with what my M5 mechanic Maris Rungis @DriftDarbnica predicted (378hp, when I asked him to place the bets) before the Dyno run.
End of video shows clip where we did a €2 coin balancing test on the M5 motor to check for vibrations. Stands still and the minimal €2 sway is from the belt-fan air passing by.
Next up is crankshaft balancing, new rod bearings & chains/guides, sensors/grommets/gaskets/o-rings/et. al. replacement and refreshment before charger install. After refresh probably will have PedM5 from M5Board tune the ESS supercharger to perfect tune.
