Pages: [1]
Author Topic: Maf conversion from hitachi to Bosch  (Read 4851 times)
S4addict
Full Member
***

Karma: +1/-0
Offline Offline

Posts: 80


« on: September 04, 2014, 06:41:57 AM »

hello all ive looked and re checked my looking to make sure i just wasent over looking something simple i could of read.
im trying to convert my hitachi file to a bosch maf and have come up blank on info of how to do so other then setting the MLOFS 0 value to 200 on the tune.
now im asuming i need to scale it again since ive changed the offset, or is scaling the maf only changed when you use a bigger housing?
also the file is an mbox so its six speed hatachi maf and has esp. if i try and run it on a 2000 s4 six speed with the maf change. the only thing next to worry about is the esp switch correct?

any info is much appreciated. thank you
Logged
stuklr
Full Member
***

Karma: +2/-0
Offline Offline

Posts: 146


« Reply #1 on: September 04, 2014, 08:03:46 AM »

Scaling is for larger housings. You did it correctly.
Logged
S4addict
Full Member
***

Karma: +1/-0
Offline Offline

Posts: 80


« Reply #2 on: September 04, 2014, 08:57:48 AM »

ok thats awesome thank you!
ya there wasent much direct info on it so i just wanted to make sure i did it correctly
Logged
armageddon
Sr. Member
****

Karma: +20/-3
Offline Offline

Posts: 348


« Reply #3 on: September 04, 2014, 01:20:14 PM »

MLHFM and KFKHFM also have to be changed
Logged
nyet
Administrator
Hero Member
*****

Karma: +604/-166
Offline Offline

Posts: 12232


WWW
« Reply #4 on: September 04, 2014, 01:25:52 PM »

MLHFM and KFKHFM also have to be changed

Yep. Even with the same housing, MLHFM is different between bosch and hitachi. See S4 551A vs 551M (for example).

Historically, people have gotten away with not copying over MLHFM, but it is "wrong" enough that it is advisable to copy it.

KFKHFM is debatable, though. That seems to be more dependent on airbox configuration than MAF

YMMV.
Logged

ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience.
Jerry Tunin
Full Member
***

Karma: +4/-1
Offline Offline

Posts: 121



WWW
« Reply #5 on: February 20, 2017, 02:55:17 PM »

So if someone were to want to convert

http://nefariousmotorsports.com/forum/index.php?topic=6695.0title=

to Bosch this is really all that is needed?
Logged

Pages: [1]
  Print  
 
Jump to:  

Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Page created in 0.016 seconds with 17 queries. (Pretty URLs adds 0s, 0q)