alpha-n and fuel trimming

[DuncanR]

Well I managed to blow an S54 engine up without all that pissing about ! ... :thumbs::hahaha: .... easy when you know how !:whistle:

[Bounce]

Well I managed to blow an S54 engine up without all that pissing about ! ... :thumbs::hahaha: .... easy when you know how !:whistle:

:hahaha::hahaha:

[EVANGELOS]

Well I managed to blow an S54 engine up without all that pissing about ! ... :thumbs::hahaha: .... easy when you know how !:whistle:

hehehehe ... what happened ????

[DuncanR]

hehehehe ... what happened ????

I kept revving it to 8400 !!!:hahaha::smokin:

























Couldnt resist that one !! spun a shell really ... very rare on S54 it would appear, engine was delimited ....even if driver was limited !:whistle:

[shimmy]

I kept revving it to 8400 !!!:hahaha::smokin:

Couldnt resist that one !! spun a shell really ... very rare on S54 it would appear, engine was delimited ....even if driver was limited !:whistle:

Yes very rare.........very.:smokin:

[cantfind1]

I can sort of understand why they've turned the trimming off - if you don't then over time the car basically 'reverts' back to stock tune, negating any benefits gained from Alpha N - the stock DME is designed that way for longevity.

Yep got it in one!

CSL MSS54HP ecu uses a completely different mapping software to the standard MSS54 ecu as well, there are many more maps, most of them not understood! Remapping a CSL is completely different to Remapping a standard M3.

CSL's will have adaptation values. Short and long term.

Normally in "alpha-n" tuned standard M3's the short term adaptive values are turned off, the long term still remain, for the reason stated by NZ_M3.

[Hazy]

Hello ,

I own a normal M3 E46 with an MK airbox and an alpha-n reprogramming on the stock ECU.

Although my car is running very nice , I have been checking through the GT1 module the adaptation values and I have discovered that the dme is making NO compensation what so ever on the injection time (both additive and multiplicative adaptation values are ZERO).

I think that the MK alpha-n programming has "locked out" the fuel adaptation routines ...

my question for all the csl owners is whether this applies to the STANDARD alpha-n programming of the csl , or not ???

I mean does the csl make fuel adaptions (have you ever checked) or not ???

thanks

I find that the Alpha N mapping in the second stage of the fuel parameters can lock out the fuel adaptations of the standard ECU given that the parameters may have been altered to allow for the standard air mass meter to compensate for increased levels of activity in throttle during extended requiremnts of torque in the first instance

[shane@mbtech]

I find that the Alpha N mapping in the second stage of the fuel parameters can lock out the fuel adaptations of the standard ECU given that the parameters may have been altered to allow for the standard air mass meter to compensate for increased levels of activity in throttle during extended requiremnts of torque in the first instance

I read that in a brummie accent and knew it did not come from your brain:hahaha::blalalala:, then re read it and thought it was bullshit, so quite possibly thought up by you! LOL