Envoy Tuning?
12-24-2007, 10:12 PM
#44
Ok, went for a ride and logged while the wife drove. First wot had kr all over the place which scared me so i returned the cam pe tables to stock setting. We made a few more wot's, still getting some kr but it does look a little better down low. Up top and at high load we get spikes.
Dead launch: You can see the intial kr spike and then it s l o w l y fades.
and this pull from ~50mph.
Dead launch: You can see the intial kr spike and then it s l o w l y fades.
and this pull from ~50mph.
12-24-2007, 11:56 PM
#45
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im wondering if some good gas will kill that kr... looks like its small spikes... but its the slow decay that it is set for thats killing you IMHO then again im no expert... but the decay on kr is set pretty slow so if you get like 5 degrees it takes a few seconds to go away
12-25-2007, 12:20 AM
#47
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timing a lil high and probably you went from one ve point to another... and it was a setting a lil less than what your engine is actually taking in, so it had to correct, but the small point where it figured that out it ran a lil lean
12-25-2007, 12:36 AM
#49
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wow bill can you do longer logs you know dive around for 20 min or so so we can get a good idea of what this thing does during normal driving...
i saw 8 degrees of kr on cell 171 and thats right as you pass half throttle ramping up to wot... i still wanna find out why your only getting 87 % tps
i gotta take another look at that tune you have... see if i can get the kr histogram off the log.... dammit the histogram for kr is not showing....
grrr.... i need to look at the tune again... looking now... are you on messenger??
i saw 8 degrees of kr on cell 171 and thats right as you pass half throttle ramping up to wot... i still wanna find out why your only getting 87 % tps
i gotta take another look at that tune you have... see if i can get the kr histogram off the log.... dammit the histogram for kr is not showing....
grrr.... i need to look at the tune again... looking now... are you on messenger??
12-25-2007, 02:49 AM
#50
The Trailblazers only show 87% throttle opening, and your KR looks like what everyone else is fighting with their TB/Envoy. I am on the Trailvoy site often and KR is something everyone is trying to figure out. With my TB, I can run Premium on stock timing and get little to no KR, but with 87 on stock tables I get KR. There are some modifier tables in the spark section I am going to try to mess with to see if its not something to do with a Cam position vs. spark multipier.
Here is a screenshot of the last log I got, this was on 93 octane....look at the minimal KR. And this is on stock timing tables in PE mode. I get about the same as you on 87 though, I could decrease the timing some, but if GM put that much in it from the factory, I don't really see a need to reduce it.
Here is a screenshot of the last log I got, this was on 93 octane....look at the minimal KR. And this is on stock timing tables in PE mode. I get about the same as you on 87 though, I could decrease the timing some, but if GM put that much in it from the factory, I don't really see a need to reduce it.