Impressions after 1 month of ownership
Posted: Thu Jan 02, 2020 12:38 pm
So far I am impressed with the Rs6.
Car is bone stock with only a remap on Engine and TCU .
Car made on a mustang dyno 568 whp (690 crank hp) and 810 wheel NM (988 crank Nm) . On a local dynojet 638whp. Power at high rpm remains flat most likely because the turbos are way off there efficiency point (need an exhaust). Intake temps skyrocket to above 86C during a simple power pull with 4gear on the dyno, It is also knocking . Engine redline is set high at 7200rpm.
What I like so far
Even though the car has not LC , just a stall rpm from converter, as I understand it (first car I owned with a converter) , I am really impressed from its launch .Stall speed is 2600-2800rpm (maybe changeable from tcu??) .. (left foot brake mod on ecu)
Launch is pretty good with a 1.68sec 60foot and with a lot of wheel spin. I think I can drop to it high 1.5 sec with better tires .
0-60mph is good too with 3.19s (2.98s 0-60 at 1feet elevation) ,0-100km/hour at 3.33s (3.13sec at 1 foot elevation).
What really hurts the car times is its gear change time (look at attach draggy pics) . I am sure it will never be as fast as a dual clutch but I am also sure there is something wrong with the tune the car is using now. I am still trying to understand how the tcu is working but if I understand the maps correctly the redline on the tcu for a gear change is at 8010rpm at full load (stock 6880) . Engine limiter is at 7200 (stock 6900) . So the engine redlines before the tcu gets ready for a gear change. The engine load drops so the tcu starts to make the gear change. I think this is the reason why is the gearchange is so slow now.
Will try and flash a file with tcu gear change set to 7150. Also will raise pressure from 17.5 to 18.5bar.
I think the car will drop below 3 sec for 0-100Km/hour with the gearbox fix and also better tires. Thats really good for a car that weights so much
What i dont like .
Car feels slow (for a 560whp). For a 100-200 km/hour it makes it 7.51sec.During this test I bet the intake temps skyrocketed and the car drooped a lot of ignition timing.need to drop it below 5 sec
What the plan
I bought a water/meth kit to install on the car and I will be removing the cats. I will not do complete exhaust system on the car yet. Will remeasure it and see if I find any other issues.
Next step will be turbo update. I have a pair of EFR 9180 that I am thinking of strapping on the engine but they are too big. Maybe I will make mine hybrid maybe a pair g30 770.
Fuel Pump update and 10 update injectors with a low pressure fuel pump update if needed (no idea) .
Car is bone stock with only a remap on Engine and TCU .
Car made on a mustang dyno 568 whp (690 crank hp) and 810 wheel NM (988 crank Nm) . On a local dynojet 638whp. Power at high rpm remains flat most likely because the turbos are way off there efficiency point (need an exhaust). Intake temps skyrocket to above 86C during a simple power pull with 4gear on the dyno, It is also knocking . Engine redline is set high at 7200rpm.
What I like so far
Even though the car has not LC , just a stall rpm from converter, as I understand it (first car I owned with a converter) , I am really impressed from its launch .Stall speed is 2600-2800rpm (maybe changeable from tcu??) .. (left foot brake mod on ecu)
Launch is pretty good with a 1.68sec 60foot and with a lot of wheel spin. I think I can drop to it high 1.5 sec with better tires .
0-60mph is good too with 3.19s (2.98s 0-60 at 1feet elevation) ,0-100km/hour at 3.33s (3.13sec at 1 foot elevation).
What really hurts the car times is its gear change time (look at attach draggy pics) . I am sure it will never be as fast as a dual clutch but I am also sure there is something wrong with the tune the car is using now. I am still trying to understand how the tcu is working but if I understand the maps correctly the redline on the tcu for a gear change is at 8010rpm at full load (stock 6880) . Engine limiter is at 7200 (stock 6900) . So the engine redlines before the tcu gets ready for a gear change. The engine load drops so the tcu starts to make the gear change. I think this is the reason why is the gearchange is so slow now.
Will try and flash a file with tcu gear change set to 7150. Also will raise pressure from 17.5 to 18.5bar.
I think the car will drop below 3 sec for 0-100Km/hour with the gearbox fix and also better tires. Thats really good for a car that weights so much
What i dont like .
Car feels slow (for a 560whp). For a 100-200 km/hour it makes it 7.51sec.During this test I bet the intake temps skyrocketed and the car drooped a lot of ignition timing.need to drop it below 5 sec
What the plan
I bought a water/meth kit to install on the car and I will be removing the cats. I will not do complete exhaust system on the car yet. Will remeasure it and see if I find any other issues.
Next step will be turbo update. I have a pair of EFR 9180 that I am thinking of strapping on the engine but they are too big. Maybe I will make mine hybrid maybe a pair g30 770.
Fuel Pump update and 10 update injectors with a low pressure fuel pump update if needed (no idea) .