Discussion
Check what their guarantee is and whether they claim it's undetectable/invisible.
A couple of dealers are 'claiming' to be able to do a checksum on the map when they do an inspection or warranty work.
Don't know how large a pinch of salt to take with it, but you never know.
I'd like to see what's really available for these engine too. In theory it should be as easy as a remap for the e46 M3, just got to make sure the new power delivery doesn't conflict with the shorter gearing of the Z4M over the M3.
Although, not heard of many people remapping it and getting great gains without other mods (exhaust, CF intake, ramscoop, etc) - although TMS were claiming 30bhp & 30lb/ft from the remap race cats & Milltek exhaust system.
A couple of dealers are 'claiming' to be able to do a checksum on the map when they do an inspection or warranty work.
Don't know how large a pinch of salt to take with it, but you never know.
I'd like to see what's really available for these engine too. In theory it should be as easy as a remap for the e46 M3, just got to make sure the new power delivery doesn't conflict with the shorter gearing of the Z4M over the M3.
Although, not heard of many people remapping it and getting great gains without other mods (exhaust, CF intake, ramscoop, etc) - although TMS were claiming 30bhp & 30lb/ft from the remap race cats & Milltek exhaust system.
Top pup said:
The limiter won't be a problem for Vmax unless you have a good tail wind on the day.
Seriously, is that all it'll do?! I've done 2 Vmax's before in my Chim 500 so understand that real speeds achieved are often worlds appart from claimed numbers - But surely with the limiter off the Z4M should see 165ish or more...
I was under the impression that (in the vacuum of space), the engine and gearing is good for almost 175?!
Vixpy1 said:
you might get 1, maybe 2bhp if your lucky, complete waste of money.
Wow... I've just seen I pass right by your place all the time. I'll have to pop in for a chat and learn more about my options. DMC have said their remap can offer about a 30bhp increase,
24Nm increase in Torque, and peak power is deliver 1,400 rpm lower down the rev range...
(and totally undetectable by BMW)
I could get the remap done at Vmax (it doesn't take long at all), and then do a direct Before and After comparrison...
. GMS 550 said:
Top pup said:
The limiter won't be a problem for Vmax unless you have a good tail wind on the day.
Seriously, is that all it'll do?! I've done 2 Vmax's before in my Chim 500 so understand that real speeds achieved are often worlds appart from claimed numbers - But surely with the limiter off the Z4M should see 165ish or more...
I was under the impression that (in the vacuum of space), the engine and gearing is good for almost 175?!
GMS 550 said:
Vixpy1 said:
you might get 1, maybe 2bhp if your lucky, complete waste of money.
Wow... I've just seen I pass right by your place all the time. I'll have to pop in for a chat and learn more about my options. DMC have said their remap can offer about a 30bhp increase,
24Nm increase in Torque, and peak power is deliver 1,400 rpm lower down the rev range...
(and totally undetectable by BMW)
I could get the remap done at Vmax (it doesn't take long at all), and then do a direct Before and After comparrison...
. 
ks!And they're moving the peak HP from 7900 to 6500rpm or are they moving the peak torque from 4900 to 3500rpm?
Maybe they'll give you 10bhp and just show you a 'before' dyno with only 315bhp, so that when your 'after' plot shows 345bhp you'll see they've given you your 30bhp. Of the three I've seen on a rolling road in shoot-out mode, I've not seen any produce less than 330bhp and 260lbft.
Ask them if they're willing to let you test their claims that it's 'totally undetectable', by having it looked at by a BMW master tech. It may be that they mean 'totally undetectable' if the service monkey is simply interrogating the system for faults, not when there's an engine warranty claim and suspicion that it's remapped.
I'd love to be able to get a 'safe' and 'reliable' 370bhp and 290lbft - and will be looking in the next year, but I don't want to have to shell out £15k of my own money for a new engine.
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