Crank Trigger Wheel setup 36-2 vs 12-1 for 2G 4g63

Hello Gentlemen, I looking to upgrade the OEM crank trigger wheel and hook up the Haltech Elite 1500.

there are two vastly differences in cost between the PRP system 36-2 and Kiggly12-1 system, my understanding is that with the 36 tooth wheel there is more timing resolution, but how much timing resolution difference is between a 36 tooth and 12 tooth, is it that much worth it ? any pro and cons at high RPM on these beside the price.

Application will be circuit racing, car expected running between 4000 and 9000rpm.

With the 36 tooth trigger wheel, your ECU should be updating its crank position data every 10° of crank rotation, compared to every 30° with the 12 tooth, so three times higher resolution. On a race engine that has rapid changes in the angular velocity of the crank, this increase in resolution equates to more accurate ignition and injection timing.

Thanks, that part I understood, but what I'm referring too is how small of changes in timing can booth support.

Sorry I should had expand more on my previous question.

Can a 12 tooth support decimal timing points, for. Example, 13.5 BTC or 21.5 BTC or smaller, how fine can be that resolution? , will it hold steady or have any of you had the chance to look with a timing light and check it is oscilates on the damper timing marks at High rpm compared with a 36 tooth.

I understand that looking at a small 4 cylinder damper with a 360 degree marking, you might not be able to see the decimal points, but I was curious if it was steady,

There are timing lamps where you can set your digital timing with a knop and they measure in decimal points, of course on a small damper is hard to see if the marker is in between the two marks to assume. It is 0.5 degrees.

You can enter timing as precisely as your software allows, but as Stephen mentioned, the ECU operates based on position data from the crank trigger.

For example if you enter 20.4 degrees of timing in your software, perhaps the spark actually fires 19.4-21.4 degrees BTDC with one trigger wheel and 20.1-20.7 degrees with the other because the point of reference is so much more accurate.

The actual range of timing error on your engine has too many variable for me to give you accurate numbers you'd see in the real world, but if accuracy in timing is your goal, then the 36-2 will do better. You can adjust a table by 0.2 degrees, but if the spark is occurring +/- 1 degree from where you're commanding it, the high resolution tuning adjustment isn't really giving you accuracy.