post your VE and Spark graphs

[oldred95]

Fast305 told me about dropping the timing off when the throttle snaps shut to provide better engine braking. WEll I took that a little further and also noticed doing so sent my VE's WAY rich in that area so I was able to cut coasting fuel substantially as well as have better engine braking. Anyway here's what mine look like. The VE table could be smoothed a little more but its hitting pretty much dead on at 128 in all cells running with that table.

Spark:
http://img.photobucket.com/albums/v604/oldred95/spark.jpg

VE:
http://img.photobucket.com/albums/v604/oldred95/ve.jpg

[HaulnA$$]

Engine braking is cool and you can have fun with it if you really retard the timing, it will pop through the exhaust and it sounds cool but engine braking is really hard on your engine bearings. Don't get carried away.

[93ChevyTBI]

being a noob-wannabe at tuning, can you or Haulin explain how to read the graphs, please? I've read the Eprom article many times (gives me a headache too) but I'd really like to know how to read the graphs. I've looked at my logs but they really make no sense to me. What colors are you wanting and where? And your BLM counts weren't visible, correct? In short, how do you know if your graphs are good or bad? Pardon the lack of knowledge...

I'm on the edge of buying some tuning stuff if I can get away with it....(the wife).

[oldred95]

Engine braking is cool and you can have fun with it if you really retard the timing, it will pop through the exhaust and it sounds cool but engine braking is really hard on your engine bearings. Don't get carried away.
I generally drive around town in 3rd to prevent unecessary shifting and it likes to pop on decel now in 3rd. Its just a few sparatic pops though, not a smooth continous chain of popping. Will decel enleanment make the popping on decel better or worse or is it mostly just timing induced? And how is it hard on the bearings? It seems like everything I'm doing is bad for the bearings. They must be really really good bearings.:aniteef:

[YenkoST]

being a noob-wannabe at tuning, can you or Haulin explain how to read the graphs, please? I've read the Eprom article many times (gives me a headache too) but I'd really like to know how to read the graphs. I've looked at my logs but they really make no sense to me. What colors are you wanting and where? And your BLM counts weren't visible, correct? In short, how do you know if your graphs are good or bad? Pardon the lack of knowledge...

I'm on the edge of buying some tuning stuff if I can get away with it....(the wife).
See if I can help you out a little:
You see kpa on the bottom of the graph....that's the map reading on vacuum in the manifold. 100 kpa is WOT and 20 kpa is the minimium bascially....coasting or deacceleration from 50 to 0. Most engines idle around 30-40 kpa. The vertical axis is how much you have for that constant whether it be timing or VE(fuel)...for example, he is running a max of 26* of timing at 100 kpa at 4400-above rpms it appears. Hope that explains some stuff.