The documentation for this on the MS site is more than a little disjointed and confusing I agree !
![Shocked :shock:](./images/smilies/icon_eek.gif)
I'll put together some notes shortly to clarify, but unfortunately I have to get some other work out of the way first.
![Sad :(](./images/smilies/icon_sad.gif)
It's not actually my car. It won't be at Joliet but I'll probably be supporting it at some races this year. I'll keep you posted, especially if it makes the Runoffs!bmacf wrote: Hey Peter, good luck with your Alfetta at Joliet. Let us know if you post pictures.
That MSQ should have O2 correction off. I don't use it. My car idles at 1100 RPM because of the cams. Remember there's a table-top/table-bottom effect in the VE table so it won't interpolate below the minimum setting. If the lowest bin is 1000RPM anything below will take that setting. What you've done is forced it to interpolate between 600 and 1000 RPM to stabilize the idle mixture.bmacf wrote: This morning was my first venture into tuning the VE tables with Megatune. First, I added an rpm row for 600 rpm. That made the idle much smoother. Then I richened the off idle mixture real-time using the Megatune real-time tune feature. Pretty cool stuff. Don't forget to turn off enrichments (O2 and tps) - I forgot initially.
My tuning method is to datalog and tune. Once you get good at reading datalogs it's pretty easy. The hard part is finding enough road to do all the driving conditions. Get as good a datalog as possible, especially in the problem areas. Look at it through MSLVV to determine what's going on and make MSQ adjustments accordingly. If you use the playback feature in MSLVV you can watch as if you were sitting in the drivers seat. If you run MT along with MSLVV in the bench tuning session, you can pause MSLVV, make the MSQ adjustment and continue playing. Keep test driving and datalogging until you have it right. I probably spent 3 tanks of gas in a weekend getting my initial tune right. But you don't have to twist my arm to go out and drive my Alfabmacf wrote: How are you all tuning your VE tables while you drive. Is there a program that does it automatically or do you take a MS saavy co pilot along with you to tweak the tables?
It's a heated sensor so that shouldn't be a problem. The problem with the Shankle headers is the O2 sitting in only 1 bank. If you have a problem with 1 cylinder in the bank it's reading it could throw your whole tuning off. I'm installing an H-pipe this spring and mounting the O2 sensor in the center.bmacf wrote: One other thing, I have shankle headers and that moves the O2 sensor bung back further from the head. I think during idle the O2 sensor gets cold and the readings are flawed. So I changed the O2 sensor enrichment so it comes on at 1200 rpm rather than 700. I think the cold O2 sensor problem was causing some exhaust smoke when I accelerate from a stop light after sitting for a while. Initially I thought it was because my rings still haven't seated but now I'm hoping I solved the problem. Stay tuned.