I'm using Osiris Tuner for my 08' Z (M/T)

What is the measure of numbers in Ignition timing table ?

milisecond?

--a

 

Did you read the manual?

 

Sure.
There isn't any information about the measure of these numbers in manual.

'Time for cylinder max pressure' in Low DET
50, 39, 63, 49...................what r thses? milisec.?

plz, help. guys~

 

kinda silly question, but no access to a phone??

Uprev: 512.821.9848

 

I think it is in the manual somewhere... But i believe it is nano seconds before "true TDC" which is what nissan believes to be the the actaul point of max comprssion not just the piston reaching the top of the stroke mechanically. Dont quote me but its something like that.

Just know that in the higher BFS one numeric value is roughly one degree and in the lower areas it might have to add or minus a few to make one degree of timing change.

Its a lil wired to look at, at first but after a while you get used to it. Just make sure you values from cell to cell are smooth and jump to much and timing will stay consistant and predictable...

 

Cobb explains the tables as using a time to burn the fuel value, basically how long before TDC the spark needs to be, to get max pressure at TDC. So basically you are telling the car that the fuel will take longer to burn, it advances the spark more. Same as a usual advance map in theory, but the numerical values are not degrees, they are much smaller, so you will have bigger numbers to get the desired advance.

As mentioned, biggest thing is SMOOTH maps, that's where the power lies. No rough transitions, no crazy spikes. The idea is to get as much timing in as soon as possible, and keep it there as long as possible. The earlier your curve comes up and the slower it falls off, the faster the car will be. Theoretically lol.

 

Thanks, guys. ^^

Tommorow, I'll finish to install Tomei 264/264 cam to my 08' Z.

So, I need accurate information of Osiris tuner program.

More advice, plz.

 

Honestly it's trial and error. Data log while making small changes until you get the actual timing values where you want them.