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

[stroker_kit]

i am experimenting the same thing oso. Increase the fuel pressure and -ve the SAFC. Same case with you... no dyno in Penang .. :( so have to experiment with an autometer AFR ..

but at least u can drive down to K.L and dyno ur car there...
here in sarawak, the nearest would be Brunei(need passport some more) and the other one would be in Sabah... the roads are like..ayoo.. no need to say la... :frown:

 

[delphinium]

i think -ve will lead to timing retarded lah. anyways, good luck to you in sarawak man. i believe the safc can be tuned on straight as well hehehe..

as for me, i might need to set everything to zero before i drive the car to kl for tune up. aiyyaa... that will be somewhere in next few months worrr..

 

[zaki]

basically the safc modifies the signal from sensor to ecu. that's what we called `cheating' :P. when the safc sends lower signal the ecu will give less fuel eventhough the actual air is more, vice versa.
for eg, if you're boosting 1 bar, but the safc is giving signal that represents 0.6bar signal to the ecu, the ecu will send fuel based on the 0.6bar value. same goes to ignition. usually the higher the boost, ignition will be much retarded. more boost more retard, less boost more advance. from the example I gave, the ignition will be more advanced (0.6 bar).

 

[hybridnos]

haaa...this is what i meant.. now im back to square 1...:frown:

cos from the last info i got, -ve SAFC means advance... and now, new info says -ve SAFC means retard.... so which is which?? can anyone clarify on this once an d for all??
thanks!!!

when -ve at safc..the timing will advance.. but.. when u -ve the safc n the timing become retard.thats mean u're knocking...too lean ..

 

[stroker_kit]

meaning that, if i drive 1bar, i should set my SAFC at the -ve sides to get a more advance ignition timing as if im driving 0.6bar ?? therefore, i need to increase fuel pressure, then set -ve at SAFC..right???

 

[zaki]

meaning that, if i drive 1bar, i should set my SAFC at the -ve sides to get a more advance ignition timing as if im driving 0.6bar ?? therefore, i need to increase fuel pressure, then set -ve at SAFC..right???

what you are trying to do is to get more advance timing but at the same time you increase pressure to have the same fuel supply

 

[DJmobile]

U already have unichip ...why u need SAFC2 ????

my unichip seems unreliable..
i was thinking if i add SAFC, will it hinder or disrupt the unichip communications??

 

[PutraCraze]

wahahhh.. unichip unreliable kah.... which versino of unichip u had....???? i wonder wat's S-AFC means??? izzit Super-Air Flow converter??? if it's so..... do apex'i need to come out with S-ITC??? feel like being cheated by apex'i.... wat u guys think??? is tat the way kah..... or some "thing" else.......muhahahahahahhahahahahaha

 

[white_bird]

some more got vafc n avcr le.. keke.. but there is a new model of piggy back from apexi.. it looks like e-manage.. dunno wad's the price.. saw it in jap mag n website..

 

[flamefox850]

meaning that, if i drive 1bar, i should set my SAFC at the -ve sides to get a more advance ignition timing as if im driving 0.6bar ?? therefore, i need to increase fuel pressure, then set -ve at SAFC..right???

stroker_kit : what zaki explain is almost complete. what i can say is all base map for ignition/fuel is fix BUT when in close loop operation the ecu will trim the map according to load from all sensors (MAP sensor, tb sensor, knock sensor, O2 sensor, ext temp sensor, water temp sensor etc).
usually more boost = retard ignition timing, and less boost/vakum = advance ignition timing. BUT when ecu sense knock it will AUTOMATICALLY retard the ignition timing to base IMMEDIATELY...but only when it sense knock la that time. it is safety feature only. so, if u remove the knock sensor, ur engine got more risk to get knock and damage !!

what u r trying to do is already done by me to my car and no problem for my daily driving car. BUT my car got distributor that at least i can alter the overall ignition timing. if ur car got no distributor...a bit susah laa. so, good luck to u

p/s: hi abundai :)

 

[stroker_kit]

yeah....i found out that increasing fuel pressure/decrease SAFC is a lot better than reduce fuel pressure/increase SAFC.... the only problem is, to tune the air fuel ratio... anyway, thanks to evry1, specially those who have generously gave me valuable tips regarding this matter..

p.s: why la Sarawak doesnt have dyno machine...if not, evrything will be much easier.. =(

 

[delphinium]

I couldnt agree more :). With the help of an air-fuel ratio meter (yeah i know its not accurate but at least I've got a rough idea wether the engine is running lean or rich), I've increased the pressure up to 52psi at WOT and -ve the SAFC around 6-10%. The engine is smoother and responsive. Have to play around with the SAFC throttle point setting to suit my driving habit.

Stroker_kit, how do you set your lo-throttle and hi-throttle setting? Mine is currently at 30% low and 65% Hi.

Anyone knows where got dyno machine around northern region?

yeah....i found out that increasing fuel pressure/decrease SAFC is a lot better than reduce fuel pressure/increase SAFC.... the only problem is, to tune the air fuel ratio... anyway, thanks to evry1, specially those who have generously gave me valuable tips regarding this matter..

p.s: why la Sarawak doesnt have dyno machine...if not, evrything will be much easier.. =(

 

[stroker_kit]

yeah...some what similar to urs...lo- 30% and hi-60%...
what car ur driving anyway??

 

[delphinium]

it's great to share info among car enthusiasts here :)

stroker-kit,
my car is nothing to shout about. no turbo. stock 1.8 mivec oni :(
but i must say that the extra 200cc with a hi-compression mivec pistons is not something that stock ecu would love to manage hehehe. hopefully the safc n adjustable fuel regulator would help solving the problem a bit. i'm looking forward to changing the pistons real soon.

wat about you? wat monster lies under the hood ?

 

[white_bird]

L9 turbo~ i answer for stroker~
hehehe.. me n him using same engine same turbine same boost same car.. ooops.. i mean same kenari.. haha..
right bundai?

L902s

 

[stroker_kit]

hahah...ya la.. nothing to shout about also... L9 turbo quite hard to tune without a proper tool...
yesterday decided to go for a wide band tune(but no dyno for rm200) and suddenly my aircond went kaboom...what a luck... there goes another rm500...huk huk huk...
then yesterday bought TOTO 4D, and it came up 3rd prize at Magnum.... haiya... this week full of bad luck...cry also no use.....hehe..hopefully nothing bad will happen to my engine...(touch wood...)

anyway, back to topic...
1.8mivec can give quite a punch also maa...i've seen a 4-throttle silver top having a hard time to drag with a mivec before...

 

[zamrioo2]

mr zaki n friens...
i would like to have explainations from u about ignition timing...

1. wat ar retard n advance about... izzit juz before n after TDC...?
2. wat the advantages of retard or advance timing...?
3. when u mentioned to get the best timing degree for ignite... huh... is that so...? very deficult la like that rite...? possible that we know the best timing ar...?

 

[white_bird]

wad i can tell u is.. diff car diff setting diff timing!! keke.. to know the best timing.. do dyno~ :P