Remapping a 30i MSport

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ProfCJJ

Member
I know that if I remap my 2011 30i MSport it will only increase by around 20 odd BHP if I remember correctly - with a similar level of increase in torque. If anyone has done this remap it the increase appreciable? i.e. can you tell the difference? I have no real reason for doing the “upgrade” other than to bring the engine up to its max ”safe” o/p - but it would be nice if I could actually tell the difference ☺️

Thanks to any one in the know about these things.

Best
 
Save your money....outright gains in power and torque will undoubtedly be overstated with the only tangible change being a difference in throttle linearity and sensitivity (a bit like pressing the sport button).
 
ph001 said:
Save your money....outright gains in power and torque will undoubtedly be overstated with the only tangible change being a difference in throttle linearity and sensitivity (a bit like pressing the sport button).
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So you reckon no appreciable difference? I always drive in Sports Mode as I really like the better throttle response - you reckon it won’t get any better?

Thanks 👍
 
Below my opinions copy/pasted from another thread.


Finally remus exhaust and tune installed. Both done at same time to my 30i.

Remus is just great. First 100km it had bit drone, but like any exhaust it needed running in and drone is almost gone. Sound is just about right. Sound is still quite quiet at low speeds and turns raspier and raw on high rpm. Just bit of drone pushing from 1500rpm.

Tune. First you need to understand that overall gain on naturally aspirated engine cant be anything like tune on turbo engine. Tune on turbo engine usually gains more torque from very low rpm when na engine can gain mostly on high rpm. Tune was still worth but just need to understand what you can get. Low rpm feels just same, but maybe bit smoother. 4k to 6k rpm heels about same but past 6k to 7k there is gain when before tune it felt bit flat. I guess tune uses safety margins on ignition and cam timing. In western europe we have just premium gasoline so maybe there is safety margins for lower quality gas. Maybe I am wrong also :)

All in all exhaust and tune made car heel better. I have straight road near me where is traffic sing after intersection (on closed road... :P ) which has been my acceleration marker many cars and bikes during 20 years time. Before tune and exhaust z4 got 179kmh and after 188kmh, so gain have to be something. To compare few that I remember, fiat punto 75hp 125kmh, bmw 520d 155kmh, jag xj 3.0d 170kmh and more than ecu tuned 331hp subaru forester 180kmh. Quite surprised it was faster than that forester. Maybe z4 has less accurate speedo also. Tuned forester was real beast at certain speeds, but I guess drivetrain loss and wind resistance were much greater at higher speeds.
 
q-man said:
Below my opinions copy/pasted from another thread.


Finally remus exhaust and tune installed. Both done at same time to my 30i.

Remus is just great. First 100km it had bit drone, but like any exhaust it needed running in and drone is almost gone. Sound is just about right. Sound is still quite quiet at low speeds and turns raspier and raw on high rpm. Just bit of drone pushing from 1500rpm.

Tune. First you need to understand that overall gain on naturally aspirated engine cant be anything like tune on turbo engine. Tune on turbo engine usually gains more torque from very low rpm when na engine can gain mostly on high rpm. Tune was still worth but just need to understand what you can get. Low rpm feels just same, but maybe bit smoother. 4k to 6k rpm heels about same but past 6k to 7k there is gain when before tune it felt bit flat. I guess tune uses safety margins on ignition and cam timing. In western europe we have just premium gasoline so maybe there is safety margins for lower quality gas. Maybe I am wrong also :)

All in all exhaust and tune made car heel better. I have straight road near me where is traffic sing after intersection (on closed road... :P ) which has been my acceleration marker many cars and bikes during 20 years time. Before tune and exhaust z4 got 179kmh and after 188kmh, so gain have to be something. To compare few that I remember, fiat punto 75hp 125kmh, bmw 520d 155kmh, jag xj 3.0d 170kmh and more than ecu tuned 331hp subaru forester 180kmh. Quite surprised it was faster than that forester. Maybe z4 has less accurate speedo also. Tuned forester was real beast at certain speeds, but I guess drivetrain loss and wind resistance were much greater at higher speeds.
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It’s a shame you haven’t got before/after runs you could post showing the difference, that would prove conclusively what’s possible with these cars :?
Rob
 
I'm pretty sure "Marlon" had his 3.0Si remapped - I think he got 278 bhp afterwards, but when the Si has 265 bhp as standard I don't think I could justify the cost.

Hopefully he might be able to tell us if it feels much different.
 
Mr Tidy said:
I'm pretty sure "Marlon" had his 3.0Si remapped - I think he got 278 bhp afterwards, but when the Si has 265 bhp as standard I don't think I could justify the cost.

Hopefully he might be able to tell us if it feels much different.
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Marlon doesn’t have any before/after verification either! :?
Ps, the si doesn’t have 265bhp, it got 265ps which is a slightly lower value unit of power equivalent to 262bhp :wink:
Rob
 
Smartbear said:
Marlon doesn’t have any before/after verification either!
Ps, the si doesn’t have 265bhp, it got 265ps which is a slightly lower value unit of power equivalent to 262bhp
Rob
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True, but was Marlon's 278 output bhp or PS?
 
Mr Tidy said:
Smartbear said:
Marlon doesn’t have any before/after verification either!
Ps, the si doesn’t have 265bhp, it got 265ps which is a slightly lower value unit of power equivalent to 262bhp
Rob
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True, but was Marlon's 278 output bhp or PS?
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Marlon doesn’t have a verifiable output :P
Rob
 
Smartbear said:
Marlon doesn’t have a verifiable output
Rob
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OK, that seems like another reason for me not to bother with a re-map on an N52! :lol: :thumbsup:
 
Sometimes its not all about the bhp figure
When I had a map put on my bike on a dyno it was not about getting a high bhp figure, it was to smooth out the whole rev range and get the a/f ratio better which sometimes results in an increase in bhp.
 
Nictrix said:
Sometimes its not all about the bhp figure
When I had a map put on my bike on a dyno it was not about getting a high bhp figure, it was to smooth out the whole rev range and get the a/f ratio better which sometimes results in an increase in bhp.
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Again, without before/after dyno runs it’s impossible to say what gains are made or where in the rev range you might be gaining (or losing) power :wink:
Rob
 
Remapping stock naturally aspirated motors is a complete waste of money.

Remapping is only worth it if your N/A motor is no longer stock (ie you have installed headers, a decat or a supercharger).

Remapping a turbo however is worth it.
 
R60BBA said:
Remapping stock naturally aspirated motors is a complete waste of money.

Remapping is only worth it if your N/A motor is no longer stock (ie you have installed headers, a decat or a supercharger).

Remapping a turbo however is worth it.
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This. The only significant benefits sometimes can be to smooth out the power curve a little. The S54 in particular is a bit lumpy low down, esp when cold and remapping can help considerably. N52 has no such problems though so I would invest your hard earned into 300 cans of Stella instead.
 
ph001 said:
R60BBA said:
Remapping stock naturally aspirated motors is a complete waste of money.

Remapping is only worth it if your N/A motor is no longer stock (ie you have installed headers, a decat or a supercharger).

Remapping a turbo however is worth it.
Click to expand...

This. The only significant benefits sometimes can be to smooth out the power curve a little. The S54 in particular is a bit lumpy low down, esp when cold and remapping can help considerably. N52 has no such problems though so I would invest your hard earned into 300 cans of Stella instead.
Click to expand...

N52 is a smoother engine as it’s not as highly strung as the S54.

I’ve heard of other people’s S54’s being lumpy but mine is very smooth (even when cold). As you said I’d rather take the 300 cans of Stella than waste it on some software. :icb:
 
ProfCJJ - Do it! Remap gave me 18 BHP. Some say it's not worth it. I say it "optimised" the car. No Black spots, CLEAN progressive power and a definite additional grunt to the exhaust. It also removed the take-off delay at roundabouts/junctions (worth it alone for that!).
 
wu_swordsman said:
ProfCJJ - Do it! Remap gave me 18 BHP. Some say it's not worth it. I say it "optimised" the car. No Black spots, CLEAN progressive power and a definite additional grunt to the exhaust. It also removed the take-off delay at roundabouts/junctions (worth it alone for that!).
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Interesting - more grunt sounds nice! :) Where did you get your remap from please if you don't mind me asking?

Cheers
 
Exactly. you cant escape the CDV delay without removing it but there is an additional electronic lag which is reduced once mapped. The car becomes far more responsive on take off (I drive a manual).
 
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