SAFC tuning related to L2 throttle sensor

[flamefox850]

hi guys, this evening just install GSR's injectors in my 850T. but still dun have time to fit adj. fuel regulator. ehhh..have to custom made the tapak is it ?

ok..after install...i just change my SAFC setting to -ve side...more -ve. even at 800rpm at -30% !!!! the idle consider ok but not like previous one lah..still 1k++ rpm. and the exhaust note tooo much bass....sound like evo liao :lol:

800rpm and 2400rpm still ok for me...but for 4000rpm....i got a headache la. i set around -17% (can't remember the exact figure..just for referrence how low it is) and running gear 3 at 4000rpm at part throttle...ok for now. after that, i drive at FULL THROTTLE at instant kick from 4000rpm to 5000rpm++...knock occur a bit. krak krak krak...the from 5000rpm..slows down to 4000rpm and suddenly i shut off throttle..my car jerk just a little. ok..that's for 1st setting

after that..i try to retarding the ignition by adjusting the distributor a bit and set richer at 4000rpm setting with around -15% (1 teeth only). drive like previous run...from 4000rpm full throttle to 5000rpm ++...a little knock only. now i consider it ok if i set richer a bit at 4000rpm setting.
BUT...when slower down to 4000rpm and again suddenly shut off throttle...my car jerk a bit more than before

so my question is........is it normal for L2 with only on/off throttle sensor behave like that (sudden little jerk) when shut off throttle suddenly with big injectors ?

my theory is...when i go part throttle(sensor goes on throttle mode)...the engine goes a bit rich (maybe not) but when i off throttle (sensor goes off throttle mode), the engine goes suddenly lean...true or not ?

sifuuusssss helpppppp

 

[mira_turbo]

:o equin0x where are you, flamefox850T need your help,,,

 

[flamefox850]

aik ? ada T plak belakang kekekeke

hmm after a session of thinking last night i just assume that maybe i need to richer a bit at 2400rpm to make the a/f ratio graph more linear and if i suddenly kick the throttle at 4000rpm, it won't knock.
for 5600rpm..have to leaner a bit..richer will make my rpm goes slow on 5000rpm..damn

any help here ?

 

[flamefox850]

ahh ok...update for today.

problem almost solve. almost got 'kampung style' fine tuning today. got a very smooth and instant low rpm (1-2k++rpm)..minimal lag (dunno how it happen)
knock almost un-noticeable at 4000rpm and the power more linear than before. yeyyyyyyyyy

*note that wire fitting plays a lot of role here..if not, many resistance to the injectors. me sudah kene..that's why my car not so smooth last 2 days. damn !

 

[sang_kancil]

fuel regulator...set to what point?
do u upgrade fuel line?
do u upgrade fuel pump?

 

[flamefox850]

fuel regulator still stock..have to make tapak lar to fit it adj. fuel reg. damn...now i know. fuel line ? dunno la..stock i think. fuel pump..yes

 

[sang_kancil]

gud...at least u oledi upgrade fuel pump...it is important to to suppl suffient fuel...

 

[flamefox850]

i think my fuel pump already got enough power to push enough petrol..now getting to custom made tapak for fuel reg la pulak