Would safc(II) affect the ign timing???

[white_bird]

heard of it but dunno whether it's true or not.. anyone??

 

[jinkl-]

nop
u need sitc to tune ign

 

[Turbo676]

heard of it but dunno whether it's true or not.. anyone??

yes. large injectors + minus fuel = advancing ignition timing

 

[PutraCraze]

i tok the fuel map was intercepted by SAFC, tat should be running on SAFC fuel map, unless u didn't adjust anything on SAFC....my assumption

 

[prozac]

May not directly affect the ign timing. What happens on the other hand is your ECU might compensate for the new fuelling SAFC2 is telling it and alter the ign timing accordingly.

 

[white_bird]

so it will still b affected but not much lor.. right?? coz for turbo car.. if set to +ve tht means the ECU will sense more boost n retart timing??? is it possible??

 

[stroker_kit]

yeah...that the whole idea...

 

[Battousai]

Yes it does affect your ignition timing. What the SAFC does is alter your load signal going to the ECU to make the ECU tell your injectors to squirt more or less fuel. For example, if you wanted less fuel, the SAFC would trick your ECU that the engine load is less.

At every load site in your ECU map are values for fuel and ignition, and these are tied together. Example: 50% load @ 3000 rpm = 50% injector duty @ 6 deg advance.

Therefore, altering your load signal to tune your fuelling will alter your ignition as well.

 

[stroker_kit]

so, when we set SAFC to negative, does that mean the ignition being retard or advance??
normally, when we drive higher boost, should we retard or advance??
does anyone know for sure, cos ive been getting different sets of answers as well... thanks...
now, confuse oledi.. after i installed a slightly bigger turbine, should i increase my fuel pressure and use -ve setting for SAFC or decrease fuel pressure and use +ve settings on SAFC??

 

[delphinium]

guys,

when we set -ve at the SAFC, does that mean we 'take out' (reduce) fuel ie: injector is going to inject less fuel, or the other way around?

 

[Battousai]

Generally...
If SAFC set to -ve, then ignition advance
If SAFC set to +ve, then ignition retard
If you go to a bigger turbine, both of what you said can work, depending what car ur using.

The best bet is to pay a couple hundred bucks and get a good dyno tune.

 

[white_bird]

erm.. wad i been told retard the timing during hi boost can increase some hp right?? can any1 elaborate a bit??

 

[zaki]

erm.. wad i been told retard the timing during hi boost can increase some hp right?? can any1 elaborate a bit??

not necessary. some to save engines, some to spool up the turbine. different engines have different approach. if you want maximum hp, you need max torque. to get maximum torque, the maximum pressure created by combustion must occur after certain degrees of ATDC. this is where the pressure will push the piston down, `faster'.
for the piston to move `faster' the ignition timing must be placed at the right angle so that the peak pressure of the combustion will occur at the `sweet spot'.

 

[stroker_kit]

Generally...
If SAFC set to -ve, then ignition advance
If SAFC set to +ve, then ignition retard
If you go to a bigger turbine, both of what you said can work, depending what car ur using.

The best bet is to pay a couple hundred bucks and get a good dyno tune.

so confirm la kalau -ve at safc= advance timing...
thanks for ur info...
so now, i'll try to increase fuel pressure and set my SAFC to -ve.... cos i tried set +ve at Safc, my engine feels very heavy la...

p.s: if sarawak got a dyno machine, i'd be the first customer to tune my car there......heheh..

 

[DJmobile]

if i had unichip, i want to add SAFC2..
will it affect the settings?