6G Celicas Forums

so the ecu on the 96+ will override it? i was always under the impression that you had the 'base' timing and the ecu would only retard if there was knock

here's a how-to for you kids, i got mine working rather nicely


http://www.toyotacelicaonline.com/timing.htm

what does jumping the terminals mean? i didnt do that. i have mine set to 25 degress i tried the others not satisfied so i went with this one using 93 octain it does eat up my gas but its worth the extra power. just wish how much hp i gained from doing this.

it means taking a jumper wire (or just a paperclip bent to the right shape) and opening up the little diagnostics box in the engine bay and connecting the TE1 and E1 terminals to put your car into a diagnostics mode.

I'm still at 18 degrees but I just moved down from 91 to 89 octane gas yesterday and haven't heard any pinging or anything. honestly, I just couldn't afford the $3.49/gallon which is how much it costs for 91 now here.

you have it set to 25!? i had mine there by accident(the guy that held the gun set the light wrong) and it knocked and pingged like crazy on 89 octane! (i usually use 93 though..) but now its set at ~16. i noticed a huge Difference...
btw, it shouldn't take extra gas.. your ecu could be picking up some knocks and overriding it to 10 or less BTD

This post has been edited by stephen_lee: Apr 19, 2007 - 12:21 PM

you have to set BASE timing, jumping those connectors sets the timing back to BASE with no advance or retard. he's not measuring base or setting base. he's just messing with timing at idle. without the pins jumped idle timing will advance and retard back and forth with load and rpm slightly. you just cannot set base timing with out putting the pcm into diagnostic mode!

so ur suggestions are to jump the terminals, but i still kinda want mine on 25 degress is this to high btw?, so jump the terminals then what cause i want mine in that setting just let it iddle or something?

just jump the terminals. if the car is running you'll hear the sound change when the terminals are jumped. then, while it's idling, set the timing. I wouldn't set it to 25 right off the bat though. because if you set it to 25 while the car wasn't in diagnositcs mode you could've been really setting it to 15 or 30 or something else without knowing it. so try 20, drive it for a day or two, if there is no pinging or rough idle or anything, then move it up again. if there is pinging or rough idle you better move it back down again though.

Anyone tried running on ethanol blend + advancing the timing? Here in Australia we've got E10, which is cheaper than regular and has a higher octane rating. From what I've read Shell is selling on with 100 octane.

From what I understand the performance is pretty much unaffected by switching to E10, but the potential for advancing the timing is interesting.

we've had that blend here in the midwest united states for years, theres little to no performance increase from the ethanol alone since here when its blended the octane of the ethanol is taken into account. slightly less fuel mileage, a little more corrosive, same price (or a little more when its been a bad corn crop).

too much timing, even if you dont have ping, wont make more power. you can get gains advancing to a point, but beyond that you'll make no more power or loose power. best bet is to do a little advance at a time and stop when you get ping or stop feeling gains. 15 feels good to me, 20 had no more pull than 15. but the GT is a different motor, but start off slow. higher octane with higher compression, more timing advance, and maybe a better pair of cams, then you could have a motor which would be able to use all 100 octane and not just be pissing away your money.

ok i finnaly think i got it right thnx for the help people!!!

bringing this one back from the dead.. ive done the seaches (i have 18 pages open on my desktop and i've read them all)

I LOVE!!!! all of the info that you all have provided here on the board reguarding advancing timeing on the 7afe (in particular), and it seems that most of you are running @89oct for the 5sfe w/ 15* advance, and @91 oct for the 7afe w/ 15* advance...

my question that has not been answered by reading all of these pages, pertaines to the fact that all i use is 93oct Shell V-power.. thats ALL i use (and when i do long road trips, where there is a chance that i cant get it, i always carry octain boost w/ me.).

so. with that in mind does any one els here run anything more advanced than 15-16* advanced on 93oct fuel? i was contemplating going to .. say... 18*advance.. but was not sure if that would be too far off the peek of the optimum effect of the timeing parabola... (did i lose anyone yet?) i do plann on taking it slow, and doing a test and error tune, starting at 15*advanced. and going up from there.. but as we all know, the but dyno is'ent exact.. probably not even enough to feel the diference between 15* and 18*..

has anyone dynoed on 93oct @ 18* advanced???
or 17, or 16, or even the concensused 15*???

i doubt that i would get any knock or pinging w/ 18* on the 93 oct fuel... but i guess what im REALLY wondering is... even IF the fuel suppressed the knock, is the timeing parabola small?

( a 10* spred factory setting of 10*advanced to say 20*advanced,... which coud explaine the common 15* advance to feeling like its right on the point of the parabola thus producing the best power.. and takeing this to be true if i set to 18*advanced im actualy falling off the other side of the peek and 18* would do nothing better.)

or large?

(with a 20* spred factory setting of 10*advanced to say 30*advanced,. and takeing this to be true if i set to 18*advanced im actualy still climbing closer to the optimum ignition timing point of the parabola peek and 18* would do something better.)

????

Any more proof (dynos and dyno charts) personal expiriences, advice, constructive critisysm on my theory, ect ANYTHING!!! would be greatly apriciated...

thank you in advance <<lol)

OH yeah, and forgot to state.. i have a 95 st auto ty

no one have any help or info for me??

Here in London all the tuners run their cars on Shell V Power,its got a 97 octane rating..its mental..

sweet that would be nice.....

but still curiouse about my Q.. does no one on this forum run 93 oct and run more than 15* advanced w/ any sort of gain???

I had run 18 degrees on 91 octane with no problems. it felt a little faster than 15 degrees, but barely.

thnx 6strings ill give it a try as soon as i get my car back on the road, and ill let u all know.

To be honest, in my opinion, advancing the ignition timing isn't really worth it. You are pumping more costly gas, use more gas, work the engine harder, wearing the engine faster, high probability of something going wrong, and only gain 1-2 ponies to the wheel with better engine responce. Feeling faster is one thing. Actually going faster is another.

true Only to an extent... the extra wear and tear is only if u dont use good gas... (which i only use V-power, cuz i want to keep may car for a long time)

u dont actualy use more gas... your making better use of it.

and correct if im wrong, but there are members here that have gotten more than just 2 whp...

and one more point id like to point out.. most of the members here are tuning the ignition timeing becuase we can, due to the car running PIG rich stock.. so migh as well get some power out of it wile your at it