Went to the track...
11-05-2009, 07:54 AM
#61
Also, can you confirm that you are entering Open Loop when at WOT and you are not staying in Closed Loop? What is your TPS raw voltage at idle and at WOT?
Also what does your timing table look like, and what is your Inj Duty Cycle @ WOT?
11-05-2009, 05:51 PM
#62
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I think the ideling and crusing area of the VE table looks a bit high as well as the decell/coast area but the WOT area looks about what I would expect. However the PE table should not read -.4 all the way up. You should be using the PE table to allow the tune to reach its desired AFR at WOT. When the computer goes above a certain point of TPS usually around 75% it will transition into Open Loop/WOT mode. If you are off on the AFR that much I would reccomend bumping up the Power Enrichment untill you get to that 12.8-13.0 butter spot that most engines like.
Also, can you confirm that you are entering Open Loop when at WOT and you are not staying in Closed Loop? What is your TPS raw voltage at idle and at WOT?
Also what does your timing table look like, and what is your Inj Duty Cycle @ WOT?
Also, can you confirm that you are entering Open Loop when at WOT and you are not staying in Closed Loop? What is your TPS raw voltage at idle and at WOT?
Also what does your timing table look like, and what is your Inj Duty Cycle @ WOT?
my inj dc at WOT is in the high 50s low 60s (42lb injectors). my timing table is attached.
thanks
11-06-2009, 11:20 AM
#64
Ok now I'm begining to see some issues. First of all the TPS must read 4.85-4.95V at WOT the low voltage reading is probably not allowing it to go into WOT mode, so first fix that. Second the car has to go into Open Loop at WOT, fixing the TPS should fix this problem. And finally what is your CR? 33 Degrees at WOT seems kind of shy. I've got a really efficent 14:1CR race motor and I am running 39 degrees at WOT. I think we can get this straightened out.
11-06-2009, 01:25 PM
#65
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Ok now I'm begining to see some issues. First of all the TPS must read 4.85-4.95V at WOT the low voltage reading is probably not allowing it to go into WOT mode, so first fix that. Second the car has to go into Open Loop at WOT, fixing the TPS should fix this problem. And finally what is your CR? 33 Degrees at WOT seems kind of shy. I've got a really efficent 14:1CR race motor and I am running 39 degrees at WOT. I think we can get this straightened out.
My SCR is 11.3:1 the DCR is 8.78:1. I run 33 degrees but my datalogger shows 36-37 so I was a little hesistant to bump it up. On the dyno i tried values from 33-37 and it made the most power at 33. However, the car never went into open loop so maybe it would've been a different story if it did. All the runs at the different timing were all within about +/- 5 hp.
11-06-2009, 01:36 PM
#66
Okay to get it to read 4.85-4.95 at WOT i would need to play with the TPS sensor which would cause it to read higher at idle right? I just want to confirm that's okay as its at .65 now. I already slotted it so it shouldn't be a problem.
My SCR is 11.3:1 the DCR is 8.78:1. I run 33 degrees but my datalogger shows 36-37 so I was a little hesistant to bump it up. On the dyno i tried values from 33-37 and it made the most power at 33. However, the car never went into open loop so maybe it would've been a different story if it did. All the runs at the different timing were all within about +/- 5 hp.
My SCR is 11.3:1 the DCR is 8.78:1. I run 33 degrees but my datalogger shows 36-37 so I was a little hesistant to bump it up. On the dyno i tried values from 33-37 and it made the most power at 33. However, the car never went into open loop so maybe it would've been a different story if it did. All the runs at the different timing were all within about +/- 5 hp.
11-06-2009, 04:25 PM
#67
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yeah but to get it to read 4.85 at WOT wouldn't I have to move it forward to increase the voltage since im only seeing 4.04. that would increase my idle voltage out of spec. im trying to grasp how i can get the voltage to read higher at WOT while not increasing it at idle.
11-07-2009, 07:38 PM
#68
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also thought i should mention that even though the datalogger shows closed loop while at WOT my MAP reading is 100, TPS% is 100, and Power Enrichment mode is triggered. im using datamaster.
11-08-2009, 07:59 PM
#69
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i did bump my idle voltage to .92 and that brought my TPS volts to 4.75 but still nothing changed the car was still running very lean. commanding a 12.7 afr the wideband was showing mid to high 14s.
11-09-2009, 08:13 AM
#70
okay guys a friend of mine just verified that at WOT datamaster still show closed loop. as long as the car is entering PE mode at WOT i'm okay and the car is doing that.
i did bump my idle voltage to .92 and that brought my TPS volts to 4.75 but still nothing changed the car was still running very lean. commanding a 12.7 afr the wideband was showing mid to high 14s.
i did bump my idle voltage to .92 and that brought my TPS volts to 4.75 but still nothing changed the car was still running very lean. commanding a 12.7 afr the wideband was showing mid to high 14s.
11-09-2009, 12:05 PM
#71
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okay cool. i'm 86% off the amount i was commanding. In order to richen it up 12.8 i'd have to command an afr of 10.97. My PE cell values would have to be much higher like you ponted out. I came up with around 18.6. I'll try it out and let you know how it works out. Thanks alot.
11-09-2009, 12:09 PM
#72
okay cool. i'm 86% off the amount i was commanding. In order to richen it up 12.8 i'd have to command an afr of 10.97. My PE cell values would have to be much higher like you ponted out. I came up with around 18.6. I'll try it out and let you know how it works out. Thanks alot.
lets get this thing fixed!
11-09-2009, 07:51 PM
#74
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Okay put 18.4 in all the PE cells and took the car out for a spin and got 12.2-5 on the wideband. On the highway you can feel the weight transfer more now at WOT so I know the car is responding well to the changes. Some fine tuning and it should be where I need it.
11-10-2009, 07:58 AM
#75
Good, forget the MAF thing I was going to show you its kind of complicated. Just dial it in with the PE table. Once you get the fuel correct, try adding another degree of timing and then readjust fuel. If you add the timing and it goes leaner then chances are good its reacting to the timing well. When I had my 11.2:1 355 w/ TFS heads and a good HR cam I was running 40 degrees of timing. My new motor is running 38, but I still got alot of tuning to do with this one. Sounds like we might be getting this fixed!!!!
11-10-2009, 10:32 AM
#76
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Good, forget the MAF thing I was going to show you its kind of complicated. Just dial it in with the PE table. Once you get the fuel correct, try adding another degree of timing and then readjust fuel. If you add the timing and it goes leaner then chances are good its reacting to the timing well. When I had my 11.2:1 355 w/ TFS heads and a good HR cam I was running 40 degrees of timing. My new motor is running 38, but I still got alot of tuning to do with this one. Sounds like we might be getting this fixed!!!!
as for the MAf i run SD mode all the time. I like th ecrisper throttle response I get in SD mode.
when you were running 40 degrees of timing was that the actual values in the cells or was that what your datalogger was showing? my datalogger shows 3 to 4 degrees of timing more that what I have in the cells at WOT.
11-10-2009, 12:51 PM
#77
definitely. i have to check if to see if the left short term still shows lean when I got WOT now that it's richer. it don't think it should anymore.
as for the MAf i run SD mode all the time. I like th ecrisper throttle response I get in SD mode.
when you were running 40 degrees of timing was that the actual values in the cells or was that what your datalogger was showing? my datalogger shows 3 to 4 degrees of timing more that what I have in the cells at WOT.
as for the MAf i run SD mode all the time. I like th ecrisper throttle response I get in SD mode.
when you were running 40 degrees of timing was that the actual values in the cells or was that what your datalogger was showing? my datalogger shows 3 to 4 degrees of timing more that what I have in the cells at WOT.
11-10-2009, 03:34 PM
#78
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How'd you check timing did you rig something up? I've been told to check timing ion the lt1 you'd have to put cylinder 1 at TDC, make a mark on the balancer, and fab up a pointer for a reference point.
11-12-2009, 07:31 AM
#79
I wonder why I have a mismatch between my datalogger and my tables???
How'd you check timing did you rig something up? I've been told to check timing ion the lt1 you'd have to put cylinder 1 at TDC, make a mark on the balancer, and fab up a pointer for a reference point.
How'd you check timing did you rig something up? I've been told to check timing ion the lt1 you'd have to put cylinder 1 at TDC, make a mark on the balancer, and fab up a pointer for a reference point.