S54 programing

[nando]

It's a blended speed-density/ alpha-n. There is a vac distribution manifold to help get a good reading, and above a certain load it is pure alpha-n (70% or so).

Mafs cost more, are subject to turbulence, dirt, electrical failure, and are more restrictive. Meh :p

[thedean]

The CSL uses a map sensor? Wouldn't the pressure signal be a little unstable, I have seen people tap a signal off every ITB into a vacuum tube and then use that as the source for the MAP sensor.

Ahhh...so it's not true Alpha-N, you are just converting from MAF to Speed-Density? So if you wanted to run velocity stacks (I personally prefer the direct air-mass reading of a MAF) creating a post-ITB Vacuum tube would become a necessity.

[nando]

no.. you don't need to do that, it already has variable TPS input, but the regular way (deleting the MAF error codes) also often results in fuel trims not working correctly, because the MAF signal is ingrained into the feedback loop.

The "right" way to do it is to flash to a CSL binary and retune it for a regular S54. You also need a 1 bar MAP sensor, but it can be any sort as long as you know what the curve looks like (pretty easy, they're all basically the same). Right now that means sending your DME to somebody.. no way to do it remotely as you have to change the boot sector to the CSL version.

as far as I know it hasn't been completely tested either but I think that will happen very soon. :)

[thedean]

what are you looking to do exactly?

be careful, a lot of alpha-N "tunes" are just deleting the MAF error codes and running on a limp mode map with no retuning.

Would the correct way be to use the TPS 0-5v signal as the MAF signal and tune the MAF table for load based voltage/Throttle %?

I have been debating doing this with the Motronic 3.3.1.

[Bimmer_man]

Mark D on this forrum can do that for you. If not try epic motorsports down where Iam and let us know how that goes. But hit Mark D first.

Will do thanks

and tttoon duly noted thank you

[nando]

what are you looking to do exactly?

be careful, a lot of alpha-N "tunes" are just deleting the MAF error codes and running on a limp mode map with no retuning.

[King Mufasa]

Mark D on this forrum can do that for you. If not try epic motorsports down where Iam and let us know how that goes. But hit Mark D first.

[tttoon]

I would maybe check the m54/s54 swap subforum and I dont know what you mean by three stages but I'm sure someone there will be able to point you in the right direction like MarkD so possibly check that and also make some shorter sentences ok thanks bye.

[Bimmer_man]

Im looking for a place that sells the programing for the E30 S54 swap i cant remember where i saw it but there where 3 stages i suppose one just removes some switch signals the next one has i guess a portion of the alpha N and the last one is Full alpha n. Any one have any idea?