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Yah I was actually thinking that I would get some pinging with the timing that far advanced, but your tables seem to be doing the trick nicely. Thank you for those!
I was looking at that thread before. Good stuff. Thanks again, buddy!
I have not forgotten about, nor am I done with this issue...
I ran my bike about 1300+ miles from September to December of last year after I ran the new map then, it got cold I got busy, my bike's emissions inspection lapsed and I couldn't do much with it until now. Long story short: mileage never did improve much. Got a little worse, if anything. I will post some data on this in a bit...
For now, some impressions of map #894 with your timing mods. The bike runs "tighter", if you will, and seems to growl more with a bit more vibration (not sure if that's good or bad). Not as silky smooth as it was before. There is definitely more snarl on let-off with more resistance. It does tend toward pinging on take-off, especially with the motor up to temperature and more so in high-heat, stop & go conditions, so may need to retard timing in the lower rpm ranges?
For my emissions inspection, I had to take the after-market exhaust system off and put the stock one back on for it to pass. While I had it off, I went ahead and installed the new O2 sensors I bought last year and put the old ones in the stock exhaust, so I don't have to wrench them out every 2 years. I also fixed the exhaust leaks (mostly - still leaks just a tad from the front header collector joint, but I can barely detect it at all at op temps) with some of that Permatex Ultra Copper silicon gasket maker stuff. We'll see what effect that has on MPG, but so far, just keeping an eye on the fuel gauge, it's not looking very promising...
Post the current map that is in the bike including the learned offsets. Is this a gen 2 or gen 3 system?
The bike has pretty much been sitting since last December. I only rode it to the inspection center and back with the stock pipes on then, one short ride to work and back with my Ness/Magnaflow 2-1 and new O2 sensors. I can certainly link up and get that data, but not sure how "good" it will be.
It's a gen 2 T-Max, I believe...
The bike has pretty much been sitting since last December. I only rode it to the inspection center and back with the stock pipes on then, one short ride to work and back with my Ness/Magnaflow 2-1 and new O2 sensors. I can certainly link up and get that data, but not sure how "good" it will be.
It's a gen 2 T-Max, I believe...
As soon as you can identify the ping locations / retard the timing is that location. Easiest if you have a tach and a have marked the TPS on the throttle. Harder if you don't have a tach.. Put miles it and record mileage.. It looks like the system is pulling fuel. Gen IIs can take some miles and a few automaps..
Here are the most recent fuel flow maps with learned offsets. Look pretty similar to the ones back in December, but I've included all maps that show an offset to provide a lil bigger picture. Higher RPMs seem to be drawing a lil more fuel, but the cruise range looks to be pulling it, like you said, so I don't know why I'm not seeing any MPG improvement...
No tach, unfortunately. I guess I could do the throttle and masking tape thing again, but that would only give me throttle position and approximate the RPM. It tends to ping as i'm giving it throttle while letting out the clutch. I can avoid the ping if I either gun it hard or go REALLY gently and gradually. Tends to ping under normal throttle on take off. Seems to me (but I'm no expert) that I should be looking at the 1280 to 1792 maps. The 1536 and 1792 maps in particular have the most extreme advance and could be taken down a notch or two, no? Could we do a little bit of experimentation here? Best place to start and how much?
BTW, I updated the thread I had going over on HDTT, as well, but no sign of the guy (q1svt) who was originally helping me there, yet...
Last edited by HoggyMtnBreakdown; Aug 3, 2017 at 09:11 AM.
You actually looked to have gone a little overboard on this which is the reason why the bike is running a little rough.. A bit too much timing.. Also you changed WOT timing way too much.. This is not the case where more is always better.. A little bit like about a couple degrees is all you need.. concentrate only in the RPM ranges and throttle positions where do most of your riding.. Should be 2000 to 3500.. The throttle you should concentrate on are about 16 to 40... The slope of the timing curve here where the mileage is..
Whoa, what a minute. I think we need to take a step back here, cuz I feel like I just stepped into the Twilight Zone!
You probably help a ton of people around here with their T-Max issues, so perhaps you don't remember me from nothin, but the timing tables are all from you, bro. If you refer back post #23, you presented me with the timing tables from your 103ci EGC. To make a long story short, we decided to copy and paste those tables directly into map #894 and use them as is. I haven't touched them at all...
I did notice that the timing was pretty far advanced when I first loaded the tables and alluded to this in post #43 above, but I wasn't noticing any pinging at that time. After some extended rides and/or riding in stop-n-go traffic, however, I did begin to observe some pinging on take off.
Whoa, what a minute. I think we need to take a step back here, cuz I feel like I just stepped into the Twilight Zone!
You probably help a ton of people around here with their T-Max issues, so perhaps you don't remember me from nothin, but the timing tables are all from you, bro. If you refer back post #23, you presented me with the timing tables from your 103ci EGC. To make a long story short, we decided to copy and paste those tables directly into map #894 and use them as is. I haven't touched them at all...
I did notice that the timing was pretty far advanced when I first loaded the tables and alluded to this in post #43 above, but I wasn't noticing any pinging at that time. After some extended rides and/or riding in stop-n-go traffic, however, I did begin to observe some pinging on take off.
Totally forgot about the fact that you are using the timing out of my 103.. It's aggressive for sure.. Start looking at removing timing in the area you can identify.. I can see where the Tmax looks to be puling fuel. You are probably starting to get pings in those areas as there was too much fuel before.
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