Double light bulbs over my head... What does it mean???
OK, I just realized something that may be obvious to some, but I hadn't thought of yet...
Look at the cam timing tables compared to the inj timing tables. When I first started looking at the inj timing I was thinking "I wonder what effects the cam timing changes I've made in my tune must have on inj timing?" So this morning I'm looking at the inj timing tables and notice that there's a pretty big retard section down low. So I pull open the cam tables and guess what? Injection timing is retarded to work with the retarded cam timing. DUH!
So here are my theories. I'm sitting in my recliner so I haven't even gone out and loaded these ideas into my car yet! And in the spirit of sharing, I'm going to post screen shots of my cam tables. I've only shared these tables with 2 other people. I feel these are some of the best DRIVABILITY cam tables I've done. Use them at your own risk, but be careful of the midrange torque improvement! And if you take these, tell everyone they're your discoveries and use them to make money selling more tunes (Yes, I've already had someone do that), just remember, Karma's a bitch!
So what I'm thinking will need to be done to make these cam tables work even better is making sure the inj timing is also advanced to match up better with the valve events. Ign timing has also been increased, so imagine this, all the events happening at the right times! Wow!
So here's the second part of the double light bulb over my head...
Decel. With larger exhausts, decel burbling and backfiring is more noticeable. I've reduced this a ton with maf compensation in the decel cells, richening up the decel. If you experiment and go super lean on the decel area maf correction cells, you will see massive backfiring due to being too lean. If you go rich on those cells, you will have a much cleaner decel, just don't go too far.
Sooo, my theory is... Look at the inj timing in the decel areas, it's super retarded. Is this for emissions? Prolly. What effect would advancing inj timing have on the decel? IDK because I'm sitting on my butt and not experimenting right now! And I'm going away for a few days and driving our Caddy, not the Sky, so I won't be able to play for awhile. So it's up to you guys to experiment! The other factor on decel is we have no control over DFCO or regular decel ign timing, it goes super retarded. If we could advance ign timing on decel it would definitely make these motors decel smoother.
Have fun and let me know what you find.
Stock tables...http://i841.photobucket.com/albums/z...dinjtables.jpg
Modified cam tables... you can see what tables I've modified, too many to post pics of. Basically make sure idle to running tables are a smooth transition and all tables (cold, knock, etc) are the same.
http://i841.photobucket.com/albums/z...dcamtables.jpg