B8 S4 Ownership
Discussion
Dr G said:
Those ECUs have been unlocked for years, the piggyback/plug-in type affairs are a bit of a bodge (but were used back in the day before this ECU could be written through OBD).
There's a fair bit of power on the table with the 3.0 supercharged, a boost regulation valve bypasses a big chunk of boost to allowed Audi to manipulate the torque curve (and restrict power) to whatever the marketing department required. This is software controlled, so a map does only the same thing by de-restricting the boost bypass and upper limit of manifold pressure (1.9 bar max standard).
Over-speeding the supercharge as well magnifies the effect. Even with software alone they feel like a much larger engine, there's torque everywhere (and lots of it).
I was having a think about this and wondering if this would mean a CAI, crank / s/c pulley upgrade etc would have no effect on power without a map to remove the restriction?There's a fair bit of power on the table with the 3.0 supercharged, a boost regulation valve bypasses a big chunk of boost to allowed Audi to manipulate the torque curve (and restrict power) to whatever the marketing department required. This is software controlled, so a map does only the same thing by de-restricting the boost bypass and upper limit of manifold pressure (1.9 bar max standard).
Over-speeding the supercharge as well magnifies the effect. Even with software alone they feel like a much larger engine, there's torque everywhere (and lots of it).
I'm tempted to start doing some mods but I've been on fleet insurance for about ten years and only came off less than two years ago. The insurance wouldn't recognise 20+ years of no claims, 10 of which were on the fleet, but the robbing, criminal scum would recognise three non-fault accidents and penalised me. So, I currently only have 1 full year no claims.
ninjag said:
I was having a think about this and wondering if this would mean a CAI, crank / s/c pulley upgrade etc would have no effect on power without a map to remove the restriction?
I'm tempted to start doing some mods but I've been on fleet insurance for about ten years and only came off less than two years ago. The insurance wouldn't recognise 20+ years of no claims, 10 of which were on the fleet, but the robbing, criminal scum would recognise three non-fault accidents and penalised me. So, I currently only have 1 full year no claims.
"Bolt on" parts generally make zero difference with modern cars, in the same way that throwing 99 RON in a car setup for 95 makes no difference. An induction kit yields nothing (beyond heat soak) for the simple reason that the car produces more than the quoted power/torque anyway. The ECU is controlling what goes in and out, so giving it the ability to put more in or take more out makes no difference if the electronics won't let it.I'm tempted to start doing some mods but I've been on fleet insurance for about ten years and only came off less than two years ago. The insurance wouldn't recognise 20+ years of no claims, 10 of which were on the fleet, but the robbing, criminal scum would recognise three non-fault accidents and penalised me. So, I currently only have 1 full year no claims.
Making larger hardware-only changes (i.e. a supercharger pulley) is more likely to give you a load of warning lights and dump the car in limp mode than any performance gain.
Dr G said:
ninjag said:
I was having a think about this and wondering if this would mean a CAI, crank / s/c pulley upgrade etc would have no effect on power without a map to remove the restriction?
I'm tempted to start doing some mods but I've been on fleet insurance for about ten years and only came off less than two years ago. The insurance wouldn't recognise 20+ years of no claims, 10 of which were on the fleet, but the robbing, criminal scum would recognise three non-fault accidents and penalised me. So, I currently only have 1 full year no claims.
"Bolt on" parts generally make zero difference with modern cars, in the same way that throwing 99 RON in a car setup for 95 makes no difference. An induction kit yields nothing (beyond heat soak) for the simple reason that the car produces more than the quoted power/torque anyway. The ECU is controlling what goes in and out, so giving it the ability to put more in or take more out makes no difference if the electronics won't let it.I'm tempted to start doing some mods but I've been on fleet insurance for about ten years and only came off less than two years ago. The insurance wouldn't recognise 20+ years of no claims, 10 of which were on the fleet, but the robbing, criminal scum would recognise three non-fault accidents and penalised me. So, I currently only have 1 full year no claims.
Making larger hardware-only changes (i.e. a supercharger pulley) is more likely to give you a load of warning lights and dump the car in limp mode than any performance gain.
Mine is currently live on AT and on here, but having listed it I've been having second thoughts and now I've got all that info from DrG in my head about remaps and boost, I'm even worse. Was parked in a field at an event at the weekend and as I walked back to it, I was caught off guard as it looked fantastic in the afternoon sunshine, sounded ok too.
Due to go on holiday in a couple of weeks, if it hasn't gone by then, I think I might stump up the cash for a EV/hybrid family hatch to do the daily duties and keep the S4
Due to go on holiday in a couple of weeks, if it hasn't gone by then, I think I might stump up the cash for a EV/hybrid family hatch to do the daily duties and keep the S4
aussieal said:
Mine is currently live on AT and on here, but having listed it I've been having second thoughts and now I've got all that info from DrG in my head about remaps and boost, I'm even worse. Was parked in a field at an event at the weekend and as I walked back to it, I was caught off guard as it looked fantastic in the afternoon sunshine, sounded ok too.
Due to go on holiday in a couple of weeks, if it hasn't gone by then, I think I might stump up the cash for a EV/hybrid family hatch to do the daily duties and keep the S4
Just seen it on AT- the Black 64K saloon? - looks lovely....Due to go on holiday in a couple of weeks, if it hasn't gone by then, I think I might stump up the cash for a EV/hybrid family hatch to do the daily duties and keep the S4
That's a small single lane winding road on Arran called The Ross that I had to take fast today because we were late and honestly it was so much fun in the S4. Never pushed her before like this on such a small winding road.
Had it in sport mode to hold the revs and the cornering was incredible, never faltered and gripped like it was on rails. The steering was surprisingly very sharp and agile, I think the torque vectoring was working hard because the brakes stank despite hardly using them. For our roads I really do find it the perfect blend of attributes and she keeps surprising me. I'm still completely stock, so have plenty of room to keep my interest in the future.
Had it in sport mode to hold the revs and the cornering was incredible, never faltered and gripped like it was on rails. The steering was surprisingly very sharp and agile, I think the torque vectoring was working hard because the brakes stank despite hardly using them. For our roads I really do find it the perfect blend of attributes and she keeps surprising me. I'm still completely stock, so have plenty of room to keep my interest in the future.
My S5 Cab LV10 JUE has gone into the trade and will be on a forecourt soon.
It was scratched and keyed to buggery but mechanically very sound, everything that could go wrong went wrong and Was duly fixed (mechatronics, water pump/thermostat, PCV etc).
Feel free to reach me if you’re coming across this car and have any questions.
It was scratched and keyed to buggery but mechanically very sound, everything that could go wrong went wrong and Was duly fixed (mechatronics, water pump/thermostat, PCV etc).
Feel free to reach me if you’re coming across this car and have any questions.
Well, that's unfortunate... Dash lit up a like a Christmas tree: ABS, ESP. TPMS, 4WD, Parking brake, headlight adjustment and sport diff faults all showing at startup.
I've tried resetting them with Carista but they come straight back. Car is still driveable, though.
Hopefully it's something simple like a fuse - where to start??
Carista fault list below.
CAN network gateway:
03619
Central electronics:
01316 - ABS Control Module
Steering wheel:
01316 - ABS Control Module
Parking brake:
460288
ABS:
00287 - Right Rear Wheel Speed Sensor (G44)
00287 - Right Rear Wheel Speed Sensor (G44)
00473 - Control Module for Electric Park- / Hand Brake (J540)
01324 - Control Module for All Wheel Drive (J492)
Engine:
17178
24194
23131
Power steering:
3164944
I've tried resetting them with Carista but they come straight back. Car is still driveable, though.
Hopefully it's something simple like a fuse - where to start??
Carista fault list below.
CAN network gateway:
03619
Central electronics:
01316 - ABS Control Module
Steering wheel:
01316 - ABS Control Module
Parking brake:
460288
ABS:
00287 - Right Rear Wheel Speed Sensor (G44)
00287 - Right Rear Wheel Speed Sensor (G44)
00473 - Control Module for Electric Park- / Hand Brake (J540)
01324 - Control Module for All Wheel Drive (J492)
Engine:
17178
24194
23131
Power steering:
3164944
silentbrown said:
Well, that's unfortunate... Dash lit up a like a Christmas tree: ABS, ESP. TPMS, 4WD, Parking brake, headlight adjustment and sport diff faults all showing at startup.
What's the battery like?Asking because I used to get similar on the old A3 if the battery was weak (and it had a battery drain issue meaning it would discharge if left a few days), all the warning lights in sequence and then, if I persevered and drove it, it would gradually shut down the DSG box until it was stranded in neutral - by that time there would be enough in the battery to restart and all would be well again.
If I Kept the battery topped up, it would be fine.
mrdanbartlett said:
Lovely! That's a hell of a lot of car for the money 
silentbrown said:
Ta. Battery is original, so 7 years old. Carista reporting 11.8V (after sitting for an hour) That seems a little low, but never been a problem turning over.
Tayna batteries are very good, from experience batteries can be the cause of a lot of issues (random dash symbols, etc) Martyn76 said:
silentbrown said:
Ta. Battery is original, so 7 years old. Carista reporting 11.8V (after sitting for an hour) That seems a little low, but never been a problem turning over.
Tayna batteries are very good, from experience batteries can be the cause of a lot of issues (random dash symbols, etc) Dr G said:
7 years old? Battery will be goosed.
Modern electronics are far more sensitive to flaky batteries than a big dumb starter motor.
I'm amazed it lasted this long with no indication of a problem, especially with the stop/start system.Modern electronics are far more sensitive to flaky batteries than a big dumb starter motor.
I think it's an AGM battery. Battery tech seems to have moved on a lot since I ruined a perfectly good pair of trousers with battery acid...
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