Max Timing Advance?

[svsgt1]

Hey guys,



I’m looking at getting my car tuned professionally and the tuner asked me to find out one piece of info I was hoping you could help me out with. He wants to know what the timing advance is at max power. The engine is pretty much stock except for slightly ported heads, performance cam, headers, and exhaust. Do these modifications change what the advance would be from a stock engine or would it be the same. If anybody knows this information please let me know. I’m not looking at getting it race tuned, just a reliable street tune that will give me a good power band.



Thanks,

Adam Grosso

 

[Zuffen]

The timing is set and controlled by the ECU and is not adjustable by moving the distributors or reluctors.

The ECU will feed the ignition the maximum advance it thiinks it can handle and pull when too much.

From memory 16degrees is about it but don't hold me to that.

 

[sideshow]

on my scanner it says the timing can reach up to 50 degrees advance at cruise which i think is too much

i havnt checked it at full power yet i need to get someone to look at the scanner while i drive

the timing is usually around 25 to 35

 

[svsgt1]

Is that the case with the stock ECU? I have a LINK 5 ECU and it can advance to whatever you tell it I I thought. One tuner asked for this info while the other did not. I guess it is not needed but it would probablly make his life easier when tuning the car. So would the 16 degrees advance be for a stock engine as well as a slightly modified engine or would it be different if you have different cams. (I do NOT have any type of adjustable cam pulley's or anything like that so my timing shoudl be the same as a stock engine)

Thanks,
Adam

 

[svsgt1]

wow, 50 degrees advance seems like way to much. But I don't know everything. I would say that the 25-35 sounds better. If you happen to find out the timing at full power please let me know.

Thanks,
Adam

 

[KDog]

Find a better tuner ASAP.

 

[sideshow]

yer i think 50 is too much too but that what the std ecu says its doing

whether it is 50 degrees on the crank i havnt checked

maybe next time i put it on a dyno

 

[gloverman]

The map I sent you was for a standard motor in a Hilux ute - pod filter and different exhaust. With the modified cams you will need to dial back the total advance. At a guess to 24-26degrees of advance with a target of around 32-36degrees BTDC. Be careful with the link it can get confusing here. Once the BASE timing figure in the link is entered the timing map changes from the advanced amount to the advanced target. This means without base set a figure on the map 15 means the link will advance 15 degree - So if the base timing was at 10 the link would add another 15degrees.
If you enter the BASE timing eg 10degrees then a figure in the map of 15 means the timing will go to 15degrees BTDC. It pays to check the base timing and enter this figure into the BASE setting.
As Sideshow says a standard ECU advances to 50degrees BTDC. I would be far more conservative at around 32-34 BTDC maybe 36 for your set up. The map I sent you we are going to 42 BTDC at cruise but it is a standard motor. Also remember you don't have the back up of a knock sensor if something goes wrong or you get a bad batch of fuel. And start rich and work leaner instead of starting lean and working richer.
Another hint for you is if you finish off with a road tune (and lambda turned on)remember the idle settings as the O2 sensor always over leans these engines at idle. Then reset the the best idle settings with about 5-10 added. Then when the O2 sensor trys to lean idle out too far it maxes out its adjustment at the best idle target.
Good luck and I hope your tuner knows link well. Cheers Kelvin

 

[SCV8]

I would also guess that 32-34 totall advance would be where you want to be.

 

[svsgt1]

Thanks guys. I'm going to get the car tuned hopefully Monday or Tuesday. All I need to do is install the Bosch air temp sensor but it didn't come with a freaking electrical harness for the two wires on the two terminals on the sensor. Does anyone know where I can get a square bosch electrical harness (prefferable in the USA)?

Thanks,
Adam Grosso

 

[gloverman]

I'll Get the part number for you tomorrow

 

[gloverman]

sorry for the delay. if you haven't got your plug the number is 1 287 013 003 -000
I keep them in stock but that won't help you i'm afraid. Cheers Kelvin

 

[Toysrme]

In general, for EFI Toyota, maximum basic advance is 35* @ maximum total advance is capped at 45*. Base timing is nearly universal @ 10*btdc. What the best timing for your engine is, I have no idea. Mid 30's-40.
My suggestion would be inline with KDogg's. A big boy tuner making big boy money should be able to find his own peak power for your engine. I would find someone more experianced.