We talk frequently about AFRs but timing is seldom mentioned.

What sort of timing range do people use? I saw reference to 19 degrees to 4500 tapering to 16 at 7000.

Since my engine rebuild I've had a few issues with under hood temps (such as melted Clutch master cylinder and ABS modulator (RHD)) and I haven't even done any serious runs.

If I remember correctly some of my timing is in the 30 degree range. I'll have to confirm that on my laptop.

I'm turbo on decompressed engine (9:1) currently only running about 6 psi (will tune up to 20).

 

This is very true i would like to know what others are running as well.

 

Come on guys, there must be some feedback on this.

 

Well this thread really got some feedback.

DO I have to ask which is better, Inline or FullRace? to get any responses.

 

Here you go. For all the world to see. Click on it twice so you can see the numbers.

 

My supercharged Church tuned numbers are a bit more conservative (2 degrees less in the upper reaches) with the 91 octane locally.

 

California gas sucks. We have 92 octane in Washington, so a little better. Also, I'm using water/meth injection that kicks in at about 12 psi.

 

Here's mine. It is a bit conservative, but I want to make sure that everything is safe. 91 octane pump gas is a bit too unpredictable to take a lot of chances.



Tim

 

My timing is similar to that: 19 degrees until ~4000 RPMs and tapers to 16 degrees at 7000 RPMs. I haven't been able to take the car to 8500 RPMs yet, so I don't know what the timing will be like up there, but I am sure it will continue to decrease.

It is my understanding that this amount of timing is very conservative.

 

Thanks guys.

I notice some very low numbers around idle. Maybe that's where mine is out.