nitrous power loss on dyno
04-24-2013, 05:26 PM
#21
LS1Tech Sponsor
Dip in graph - possible clutch slip To see if the dip in the graph is clutch slip have them plot a graph showing engine RPM versus chassis dyno roll speed (MPH). If it is clutch or tire slip you will see a change in the slope of the line in that area.
04-24-2013, 05:30 PM
#22
LS1Tech Sponsor
Knock Does the calibration have the knock sensitivity changed? Could it be real knock that the ECM/PCM isn't noticing? A good way to check that is to put much higher octane fuel (aka knock unlimited fuel) and see if it changes. If you are on 93, try VP109. If it goes away then it was probably knock. If it doesn't then it is probably something else.
The tuner looked at the logs and said it pulled no timing. He's a reputable ls tuner, so I don't think he would have missed it after 3 pulls. I appreciate your help but I don't think that's it.
I just swapped solenoids and ran new wiring. Gonna go for a test drive soon.
And when he changed the timing for the nitrous, 4* being pulled while running all motor, it only dropped 10hp
I just swapped solenoids and ran new wiring. Gonna go for a test drive soon.
And when he changed the timing for the nitrous, 4* being pulled while running all motor, it only dropped 10hp
04-25-2013, 01:51 AM
#25
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Does the calibration have the knock sensitivity changed? Could it be real knock that the ECM/PCM isn't noticing? A good way to check that is to put much higher octane fuel (aka knock unlimited fuel) and see if it changes. If you are on 93, try VP109. If it goes away then it was probably knock. If it doesn't then it is probably something else.
i upgraded all the wiring to 12 gauge. and i swapped out both solenoids with ones that were still in the box from nx after getting rebuilt.
i can still feel the dip in power
