Hi,
When I look at the timing map on the internet/forums I see that my numbers are much lower than yours (about 44 vs 54). The car runs well except when the load rises very quickly, the timing falls to -10 and -7 for .5 second and it returns to normal and car pull strong again?!?!

I have an vq35de revup engine with ratio of 8.8:1, head stock. I changed the knock sensor and cams/crank sensor .. always the same timing problem that goes down when the load rises too fast.

What influences timing? Cam/crank sensor, maf and..?

This is my timing map

Sorry for my english..i hope you understand!

Thanks

 

https://my350z.com/forum/tuning/5188...ing-101-a.html

 

Constructive comment?
Why my timing drop to negative value when high load come fast?

 

Check fueling. I had similar problem, it turned out that taking some fuel in MAF table put ignition values at the place.

 

Ok.. I think i need to do more fine tuning on my K fuel and Maf table to be sure base tune are perfect.. last time I wanted to datalogger my values (a/f, fuel corr., timing..), Uprev crashed everytime!? I'll retry..if not i'll check with Uprev.
Thanks