Open Loop Speed density
11-27-2011, 01:41 AM
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Open Loop Speed density
Anyone here run OLSD in your truck NA? How are you liking it?
Got a half decent tune on my friends NNBS 5.3 and I am liking it so far. Seems pretty smooth and responsive and has ran its best since he has owned it. I started working on my truck and have only got a few logs in and notice a difference too. Cant wait to get it done and see how well economy and overall driving is.
Got a half decent tune on my friends NNBS 5.3 and I am liking it so far. Seems pretty smooth and responsive and has ran its best since he has owned it. I started working on my truck and have only got a few logs in and notice a difference too. Cant wait to get it done and see how well economy and overall driving is.
11-27-2011, 11:26 AM
#2
Its a good option for guys like yourself and myself that own software that can keep a check on things. There are some pros and cons with olsd. IF a vaccum leak or similar issue occurs, there is no safety blanket as no correction can occur. A pro is how you can setup your afr for cruise and lean it out, response does seem a bit better and it makes it easier to tune on most vehicles since you aren't having to touch the maf.
I have done some peoples rides in olsd, but they were mostly track purpose vehicles that saw rare street warrior action.
An old buddy on here has always ran olsd on his truck....dirttrackracer. If you can keep an eye on it, it will be great.
I have done some peoples rides in olsd, but they were mostly track purpose vehicles that saw rare street warrior action.
An old buddy on here has always ran olsd on his truck....dirttrackracer. If you can keep an eye on it, it will be great.
11-27-2011, 01:40 PM
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Its a good option for guys like yourself and myself that own software that can keep a check on things. There are some pros and cons with olsd. IF a vaccum leak or similar issue occurs, there is no safety blanket as no correction can occur. A pro is how you can setup your afr for cruise and lean it out, response does seem a bit better and it makes it easier to tune on most vehicles since you aren't having to touch the maf.
I have done some peoples rides in olsd, but they were mostly track purpose vehicles that saw rare street warrior action.
An old buddy on here has always ran olsd on his truck....dirttrackracer. If you can keep an eye on it, it will be great.
I have done some peoples rides in olsd, but they were mostly track purpose vehicles that saw rare street warrior action.
An old buddy on here has always ran olsd on his truck....dirttrackracer. If you can keep an eye on it, it will be great.
11-27-2011, 01:52 PM
#6
I am running Closed Loop Speed Density right now while i am waiting for my new intake parts to show up so i can put on the LS7 MAF..
One thing i have noticed on the NBS trucks it the transient fueling seems off compared to running MAF... It just seems like it dumps way toooooo much fuel on tip in and throttle transitions...
One thing i have noticed on the NBS trucks it the transient fueling seems off compared to running MAF... It just seems like it dumps way toooooo much fuel on tip in and throttle transitions...
11-27-2011, 01:54 PM
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I am running Closed Loop Speed Density right now while i am waiting for my new intake parts to show up so i can put on the LS7 MAF..
One thing i have noticed on the NBS trucks it the transient fueling seems off compared to running MAF... It just seems like it dumps way toooooo much fuel on tip in and throttle transitions...
One thing i have noticed on the NBS trucks it the transient fueling seems off compared to running MAF... It just seems like it dumps way toooooo much fuel on tip in and throttle transitions...
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11-27-2011, 02:20 PM
#10
yep you just scale down the lower temp ones... For example these are the values in the table... You can see the colder it is the more it adds...
Stock Values
LABELS E80 Fuel %
ECT °F 0
-40 0.540039
-22 0.615967
-4 0.679932
14 0.710937
32 0.710937
50 0.673828
68 0.610351
86 0.535644
104 0.462891
122 0.390381
140 0.334473
158 0.288086
176 0.255127
194 0.228760
212 0.209961
230 0.190430
248 0.170654
266 0.143555
284 0.104980
Adjusted Values
LABELS E80 Fuel %
ECT °F 0
-40 0.262954
-22 0.260350
-4 0.257772
14 0.255220
32 0.252693
50 0.250191
68 0.247714
86 0.245262
104 0.242833
122 0.240429
140 0.238049
158 0.235692
176 0.233358
194 0.231047
212 0.228760
230 0.228760
248 0.228760
266 0.228760
284 0.228760
Something like that would probably help, but i am too lazy to break out my cable and load it...
Stock Values
LABELS E80 Fuel %
ECT °F 0
-40 0.540039
-22 0.615967
-4 0.679932
14 0.710937
32 0.710937
50 0.673828
68 0.610351
86 0.535644
104 0.462891
122 0.390381
140 0.334473
158 0.288086
176 0.255127
194 0.228760
212 0.209961
230 0.190430
248 0.170654
266 0.143555
284 0.104980
Adjusted Values
LABELS E80 Fuel %
ECT °F 0
-40 0.262954
-22 0.260350
-4 0.257772
14 0.255220
32 0.252693
50 0.250191
68 0.247714
86 0.245262
104 0.242833
122 0.240429
140 0.238049
158 0.235692
176 0.233358
194 0.231047
212 0.228760
230 0.228760
248 0.228760
266 0.228760
284 0.228760
Something like that would probably help, but i am too lazy to break out my cable and load it...