06-09-2023, 11:43 PM | #15 | |
Drives: 2013 ZL1 Join Date: Nov 2015
Location: Northeast
Posts: 72
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Quote:
Also, didn't get any history on the tune, so I installed a wide band & watched AFR & knock retard. Seems safe, but some say this combo should need injectors & maybe more pump, so I'm not sure why I have so much headroom. |
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06-10-2023, 09:33 PM | #16 | |
Drives: n/a Join Date: Jan 2015
Location: United States
Posts: 67
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Quote:
In any case I found and setup my MPVI2 from HPtuners and loaded the scanner software on my surface pro. I'm going to drive around town tomorrow to see if I can see what is going on. Last edited by sbelyo; 06-11-2023 at 08:39 PM. |
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06-11-2023, 08:36 PM | #17 |
Drives: n/a Join Date: Jan 2015
Location: United States
Posts: 67
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So I think I see what the tuner was talking about. I was able to get my HPtuner to log some data on a run. I saw the fuel pressure drop to as low as 40 psi when the engine RPM was around 4k I think and the IDC got as high at 68% when the rpm was around 4200 I think but the PSI was in the low 50's at that point. I'm sure he drove it harder but I don't have that log.
I've attached the HP Tuners log files, with a copy in csv as well. Take a look and see what you can make of it. I'm new to the car so I lifted at points. I'm a wuss, flame me if you want |
06-14-2023, 07:01 AM | #18 |
Drives: n/a Join Date: Jan 2015
Location: United States
Posts: 67
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The fuel pump was replaced with positive results. It drives much smoother now and I feel more power for sure. He said that the injector duty was still high so there's something going on there, but the fuel pressure is better. Not sure if it can be fixed with a re-tune or I'll need to pony up for bigger injectors. I ordered a 2.75" pulley and a larger belt to back the boost down a bit until I can get it tuned.
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