If you can find a tuner that can flash an MSS70, I have one on the shelf for sale.
Announcement
Collapse
No announcement yet.
Andrew's S54 Swap
Collapse
X
-
Originally posted by gobuffs View PostIf you can find a tuner that can flash an MSS70, I have one on the shelf for sale.Last edited by Andrew325is; 01-15-2013, 01:11 AM.
Comment
-
why is it so much better? I mean it's faster, but.. what does that really mean? did injector timing accuracy increase by 1000%? did ignition timing accuracy increase 5x?
you learn as you really get into standalones and stock computers that faster doesn't really mean a whole lot. there are some things that are good to have better precision/faster processing for but they are also diminishing returns.
if you tell me the fuel map is 2x the size, I'll yawn. :p
Comment
-
Originally posted by nando View Postwhy is it so much better? I mean it's faster, but.. what does that really mean? did injector timing accuracy increase by 1000%? did ignition timing accuracy increase 5x?
you learn as you really get into standalones and stock computers that faster doesn't really mean a whole lot. there are some things that are good to have better precision/faster processing for but they are also diminishing returns.
if you tell me the fuel map is 2x the size, I'll yawn. :p
Comment
-
eh. I doubt you would even notice. most likely, it's for emissions. I can't see the extra cost and trouble being worthwhile, unless MSS70 is considerably easier to tune than MSS54.
I can't recall ever hearing anyone complain that the throttle response of an S54 was slow, or there was any detectable lag.
the S54 in the Z4m makes the same HP right?
Comment
-
on the subject of E-throttle control - some interesting stuff has come up recently. Apparently, the US S54 tune doesn't open the throttle more than 75% until after 4000rpm. It doesn't reach 100% until 5000rpm. The solution is to use the EU tune or the CSL tune which are both much, much more aggressive.
the thinking is the US tune was limited to 75% throttle for emissions reasons.
Comment
-
Originally posted by nando View Poston the subject of E-throttle control - some interesting stuff has come up recently. Apparently, the US S54 tune doesn't open the throttle more than 75% until after 4000rpm. It doesn't reach 100% until 5000rpm. The solution is to use the EU tune or the CSL tune which are both much, much more aggressive.
the thinking is the US tune was limited to 75% throttle for emissions reasons.
Comment
-
Originally posted by ohthejosh View PostThanks for documenting your swap thoroughly. Will be referring to this thread for guidance.
Comment
-
Originally posted by nando View Poston the subject of E-throttle control - some interesting stuff has come up recently. Apparently, the US S54 tune doesn't open the throttle more than 75% until after 4000rpm. It doesn't reach 100% until 5000rpm. The solution is to use the EU tune or the CSL tune which are both much, much more aggressive.
the thinking is the US tune was limited to 75% throttle for emissions reasons.
Last edited by Asbradley21; 01-23-2013, 12:57 AM.
S54B32 swap in progress. Status: Getting There
Comment
-
it's trivial to retune the E-throttle, and it's also basically free. and, I still doubt it responds the same way, as Andrew said, the S54 ITBs were never meant to be used with a throttle cable linkage.
If you look at an S54 throttle map, there's a lot of resolution in the low-RPM, low-load range. The S54 throttles are large and it has a short ram intake. A small change in throttle angle at low load will result in a large increase in air. It also affects transient response (AE).
Basically, IMO, there's no reason to use a throttle cable at all, unless you're not using MSS54 then you have no choice.
Heck, even Bimmerworld says it's not suggested if you have the stock DME:
This part is not required or suggested with the BimmerWorld S54 Conversion electronics or any stock ECU application.Last edited by nando; 01-23-2013, 07:17 AM.
Comment
-
Originally posted by nando View Postit also costs $350. that's $350 you could spend on headers or something worthwile. that would buy you almost 4 hours of dyno time, for example.
it's trivial to retune the E-throttle, and it's also basically free. and, I still doubt it responds the same way, as Andrew said, the S54 ITBs were never meant to be used with a throttle cable linkage.
If you look at an S54 throttle map, there's a lot of resolution in the low-RPM, low-load range. The S54 throttles are large and it has a short ram intake. A small change in throttle angle at low load will result in a large increase in air. It also affects transient response (AE).
Basically, IMO, there's no reason to use a throttle cable at all, unless you're not using MSS54 then you have no choice.
Heck, even Bimmerworld says it's not suggested if you have the stock DME:
And I daily drove a cable coversion throttle s54 in hilly san Francisco happily
Sent from my GT-N7100 using Tapatalk 2OBD1 M54/M52TU swap as a M50b25
Z4 non powered steering rack fits e30
Euro e46 2005/6 320d 6mt gearbox into E30 with M20 hardy and beck 1985 327s engine
Comment
-
Andrew, I called Orme Brothers and they said they have never sold a m22 female to -10 AN Male, would you have a part number?
They do have an m22 (f) to -12AN (m)?
If you had a PN that would be great.
thanks
Anthony
anaphe@gmail.com
Comment
Comment