2.0 sdrive to 2.8i performance. ?

... and then you remap the 35i or 35iS in the same way as the 28i and push 380-420 bhp and the 28i doesn't know which way you went.

The graph is good fun, but not really a fair comparison - interesting to see though.
 
35is comes with a warranty ... 28i remapped = no warranty (or at least the chance of a horrible surprise with a warranty claim one day).
 
Well the previous cars had remaps JB4 (335i) and PowerTorque (330D)- both had warranty repairs completed by BMW

As these are less visible than remapping the the ECU
 
SO8 said:
35is comes with a warranty ... 28i remapped = no warranty (or at least the chance of a horrible surprise with a warranty claim one day).
Click to expand...

Only when buying new/nearly new.
Might be interesting to see what the price differential is between used 28i and a used 35is, is there say at 3/4 years old that much of a gap

And i suppose even new, depending on your annual mileage, the difference in fuel economy between a 28i and a 35is might be the decider
 
While 0-to-naughty runs are all well and good for me the point of real interest is what's happening in the first 2500 rpm. I dunno about you guys but I spend most of my time in the 1400-2250 rpm range. A remapped N20 simply won't have the torque or throttle response of the N54 engines.
 
That's very true...

A mapped N54 is a true beast, the torque is incredible....

Mpg is a moot point IMHO.. I went for a mooch over the hills today, probably did about 45 miles of mixed driving and still returned 28 mpg ...

Doubt you would get much more if anything out of a four banger in the same scenario
 
techathy said:
While 0-to-naughty runs are all well and good for me the point of real interest is what's happening in the first 2500 rpm. I dunno about you guys but I spend most of my time in the 1400-2250 rpm range. A remapped N20 simply won't have the torque or throttle response of the N54 engines.
Click to expand...

I spend most of my time between 1200-3000 rpm, I rarely ring it out - so the 4 pot just won't cut it for me.
 
Twin Turbo said:
Well the previous cars had remaps JB4 (335i) and PowerTorque (330D)- both had warranty repairs completed by BMW

As these are less visible than remapping the the ECU
Click to expand...

I think the level BMW go to re finding out if something is mapped is probably relative to the cost to them.

Bust a gearbox or engine in style and I suspect someone with a map or other way of increasing power may have issues.

BMW and VAG have allegedly more intrusive / secretive methods of detecting maps than other manufacturers. Whether that is true they will not let on. I for one will not take the chance.
 
If you need power , torque and economy the only way to do that is stick in a six cylinder Diesel engine!
 
The 35d is rubbish on fuel though..

Ok when cruising along at 56 mph but as a daily on a commute they are pretty poor..

Out of a 2.0 Z4 you can get 50 mpg apparently, seems feasible as I can get 40 mpg on a steady run out of my 35is..

How much better can a diesel be ?
 
Z4M-2006 said:
The 35d is rubbish on fuel though..

Ok when cruising along at 56 mph but as a daily on a commute they are pretty poor..

Out of a 2.0 Z4 you can get 50 mpg apparently, seems feasible as I can get 40 mpg on a steady run out of my 35is..

How much better can a diesel be ?
Click to expand...

Wow, 40mpg from a 35iS ! You must have the restraint of a saint. The most I have seen is 34mpg.
 
Z4M-2006 said:
. . . . . . I can get 40 mpg on a steady run out of my 35is. . . . . . .
Click to expand...
That has got to be something like a 50mph steady run! Who buys a 35is then poodles about to maximise mpg? Diesels will give you much more mpg than a petrol at comparable speeds (unsatisying noise, restricted rev range, more nose heavy, reduced handling prowess, much, much less enjoyment but has an in-built smoke screen on demand and better fuel efficiency).
 
The whole point of the 28i for me is the 25 mpg I keep getting in my TTS is slowly grating away at me. I would like to have fun in the z4 and perhaps get 25 MPG or less. Then on my work commute go in to sensible mode and get 35 mpg+. TTS was just a bit thirsty for me. 35i would probably be the same .Great fun though. My Z4 3.0 si was a great engine and pretty good on fuel.
I know if I that worried about fuel I should get a diesel TT or SLK. The sub 6.0 seconds 0-60 is too much of a lure on the 28i.
The 28i is a compromise over the 35i but I hope not too much of one.
The sound generator through the speakers is a joke.
 
Garvin said:
Z4M-2006 said:
. . . . . . I can get 40 mpg on a steady run out of my 35is. . . . . . .
Click to expand...
That has got to be something like a 50mph steady run! Who buys a 35is then poodles about to maximise mpg? Diesels will give you much more mpg than a petrol at comparable speeds (unsatisying noise, restricted rev range, more nose heavy, reduced handling prowess, much, much less enjoyment but has an in-built smoke screen on demand and better fuel efficiency).
Click to expand...


Sometimes you have to...

Road conditions and restrictions denote the speed you have to keep to...

If you keep within the speed limits on a decent motorway run you will see very high 30's..
You can't be hell for leather everywhere,
 
Z4M-2006 said:
Garvin said:
Z4M-2006 said:
. . . . . . I can get 40 mpg on a steady run out of my 35is. . . . . . .
Click to expand...
That has got to be something like a 50mph steady run! Who buys a 35is then poodles about to maximise mpg? Diesels will give you much more mpg than a petrol at comparable speeds (unsatisying noise, restricted rev range, more nose heavy, reduced handling prowess, much, much less enjoyment but has an in-built smoke screen on demand and better fuel efficiency).
Click to expand...


Sometimes you have to...

Road conditions and restrictions denote the speed you have to keep to...

If you keep within the speed limits on a decent motorway run you will see very high 30's..
You can't be hell for leather everywhere,
Click to expand...

Sadly in London / Surrey the conditions are such that changes of speed and stop / start with a bit of fun every so often mean that decent economy is practically impossible to obtain compared to other parts of the UK. My 15mpg urban on short commute shows the other end of the scale ...
 
Looking at several fuel economy sites I find that the difference between the best long term average 330d & 335i is about 8mpg in favour of the diesel. The difference between the worst 335i & 330d is about 5mpg with the 335dx being about 3mpg.

I'm currently averaging just under 29mpg in my 35iS doing journeys mostly in the 15-20 mile range (so the engine is only just about getting properly warmed up) on a mixture of top-up motorway driving & top down non-trunk A road/major B road driving with a touch of top down urban driving. That's with me being quite liberal with the throttle when the situation allows because I love to hear the engine stretch its legs.
 
SO8 said:
Z4M-2006 said:
The 35d is rubbish on fuel though..

Ok when cruising along at 56 mph but as a daily on a commute they are pretty poor..

Out of a 2.0 Z4 you can get 50 mpg apparently, seems feasible as I can get 40 mpg on a steady run out of my 35is..

How much better can a diesel be ?
Click to expand...

Wow, 40mpg from a 35iS ! You must have the restraint of a saint. The most I have seen is 34mpg.
Click to expand...
Top up, CC set to 65mph put on some tunes & relax. ~40mpg on 110 miles of motorway is the only way I can explain 29mpg from a weekend of fast backroad driving.
 
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