TUNING UPDATE: So far I have gained 4 degrees and 2% rich on WOT fuel. I have ZERO LT KR....and only 3 ST KR's on gear changes.
2 are .5's
One is 1.0 at 107 mph gear change.
I also changed shift points from 6400 to 6250. I noticed before that the last 200 rpm were a lil lazy. (past the curve) It is much happier now.
I will probably end up at 5 or 6 degrees and a little more fuel. That's a BUNCH from where I was.
I can tell you that I now have a completely different car than I had. MUCH quicker. On my last run I peddled it from a start and the wheels spun to 70mph. That was peddling it on new Nitto 555 G2's. (street tires)
That has NEVER happened before.....period. I'll keep ya'll posted on the final.
I'm really glad you guys peaked my interest on getting involved......THANK YOU!!!!
Sounds like you are really dialing it in! That's great!
I have my shift points set to 6400-6450RPM. I didn't want to go past 6500RPM just to keep things conservative. It does seem to like the slightly higher shift points though.
5-6 degrees more of timing on top of Jay's tune seems like a lot. But if you're not getting any knock retard, then I guess it should be fine. What you'll find is the car will only go faster to a certain point. I tried adding more timing at the track over Jay's tune and my car did not increase mph at all. I lowered it back down and got the same mph again. So if you aren't getting any additional mph, then don't add anymore timing. You want to run as little timing as possible to get the max mph. Anything more just puts additional strain on the engine and makes you more prone to knock in hotter weather, with crummy fuel, etc.
The other thing I learned from tuning my Nova is that while a car may "feel" faster with more timing, it may not necessarily translate into a faster ET. Both my Nova and the Challenger seem to like more timing down low, to get the car moving, but then up top, they don't need to go as crazy with the timing. My Nova I ran with 32, 34, 36, and 38 timing at the track and it made the best mph with 34, so I kept it there. I then locked the timing out, so it had all 34 degrees right off the line, and I dropped my 60ft another tenth. Peak timing was still the same, but brought more in down low and faster, and it responded positively. My Nova "felt" faster on the street with 38 degrees, because it felt stronger down low and mid-range, but up top it didn't make any more power. In one case my distributor slipped and had advanced up to 44 degrees. My car lost .6 ET and 5mph! Put it back to where it should be and came right back.
Keep an eye on your mph at the track next time you run and trying adding/subtracting timing between passes and see if your mph moves at all. If it stays roughly the same, run the least amount of timing you can to get that max mph.
Regarding your fuel adjustments, without a wideband you're really just shooting in the dark. You could be way rich already and add another 2%, or you could be way lean, and adding 2% helped a little, but you're still way lean. You're likely in the ballpark, but without a wideband to use, it's really hard to say where your fueling should be.
Keep us posted how it does next time you run it!