07-11-2018, 07:17 AM | #1 |
Drives: 2017 1ss 1le Join Date: Sep 2015
Location: new york
Posts: 436
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Horrible gmpp tune
Has anyone else noticed that the gmpp tune for the gm cold air intake, is Terrible? I recently purchased a 2017 with this combo installed and the car feels slower then every other stock 1le I’ve driven.
I’m wondering what it would take to have the car flashed back to stock tune by my dealer? |
07-11-2018, 07:45 AM | #2 |
Drives: 2016 2SS Convertible Join Date: May 2012
Location: St. Louis, MO
Posts: 1,711
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Just FYI that I pulled before and after shots of the ECM when I had mine installed. I used the Difference function in HP Tuners and it only showed a recalibration for the MAF. It didn't detect any other parameter changes. It's my guess that the dealer isn't allowed to flash back unless you remove the GMPP intake and reinstall the original intake.
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07-11-2018, 07:53 AM | #3 |
Drives: 2017 1ss 1le Join Date: Sep 2015
Location: new york
Posts: 436
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Honestly I would be happy to reinstall the factory air box. The gm tune and intake makes less power then a stock 1le.
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07-11-2018, 08:22 AM | #4 |
Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,676
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How scientific
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22 2SS 1LE M6 Summit White - RF, Flexfuel, LT2 intake, 95mm tb, ATI udp, VT ramair, full 28 dragpack - 11.68@122
16 1SS M6 LT2 intake + boltons on DR 11.0@126+ (Sold) |
07-11-2018, 08:24 AM | #5 |
Drives: 2017 1ss 1le Join Date: Sep 2015
Location: new york
Posts: 436
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Actually it is backed by science. I have a dyno sheet from the previous owner showing a before and after. There is a 10-15 hp loss between the stock and gmpp setup. But thanks for your input!
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07-11-2018, 08:25 AM | #6 |
Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,676
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Post it up.
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22 2SS 1LE M6 Summit White - RF, Flexfuel, LT2 intake, 95mm tb, ATI udp, VT ramair, full 28 dragpack - 11.68@122
16 1SS M6 LT2 intake + boltons on DR 11.0@126+ (Sold) |
07-11-2018, 08:33 AM | #7 |
Drives: 2017 1ss 1le Join Date: Sep 2015
Location: new york
Posts: 436
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07-11-2018, 11:42 AM | #8 |
Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,676
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Is that SAE?
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22 2SS 1LE M6 Summit White - RF, Flexfuel, LT2 intake, 95mm tb, ATI udp, VT ramair, full 28 dragpack - 11.68@122
16 1SS M6 LT2 intake + boltons on DR 11.0@126+ (Sold) |
07-11-2018, 12:30 PM | #9 |
Drives: 2017 1ss 1le Join Date: Sep 2015
Location: new york
Posts: 436
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No clue. That was from the previous owner
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07-11-2018, 04:25 PM | #10 |
Drives: 2023 2SS Convertible Join Date: May 2009
Location: Metro Detroit
Posts: 1,062
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Go check the install. The alignment between the MAF tube, filter, and box are critical.
-Geoff
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'12 2SS RS Convertible - Traded in.
'16 2SS Convertible - White on white, mag-ride, NPP, nav. Sold! '23 2SS Convertible -Same as above except orange. |
07-12-2018, 06:47 AM | #11 |
Probably doesn't like you
Drives: 2022 WCT ZL1 M6 Join Date: Jun 2015
Location: Boston-ish
Posts: 1,252
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My butt dyno thinks that the car feels the same, with more some more pop and gurgles.
It definitely does not feel weaker.
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I hope the 6th gen Camaro has a melodious horn trumpet. I'll tootel it at the ladies, yelling out "Hi hi." - RenegadeXR
كافر ΜΟΛΩΝ ΛΑΒΕ железобетонное очко Quod gratis asseritur, gratis negatur. There is an unequal amount of good and bad in most things, the trick is to work out the ratio and act accordingly. |
07-13-2018, 12:10 AM | #12 | |
Drives: 2017 Grand Sport Join Date: Oct 2013
Location: NC
Posts: 54
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Quote:
Done on the same dyno in similar conditions?
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17' Grand Sport
PP ported MSD IM, NW 103mm TB, ARH 2" headers w/ 3" catted x-pipe, PP Flex Fuel tune, Halltech CAI, some radials and a CATCHCAN!!! |
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07-13-2018, 01:49 AM | #13 |
Drives: 2019 2LT 2.0T M6 Riverside Blue Join Date: Jan 2018
Location: WA
Posts: 847
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They must have done something wrong. Mine feels livelier (and louder) with the GM CAI and tune.
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07-13-2018, 07:54 AM | #14 |
Drives: 1LEs Join Date: May 2009
Location: DFW - Texas
Posts: 1,319
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I just run the air box portion for looks and a bit more noise. Never got the tube out of the box. Will be able to sell it with the tune still available for a VIN if I ever go a different route. No or not enough difference felt between stock and it. So many aftermarket mods say you gain a billion rwhp with a CAI, or catback, or [insert part name of choice].
I did not data log MAP or MAF before and after, but, you could to see manifold depression change (or not) and MAF g/sec change (or not) with each modification to the intake and / or exhaust stream. Of course, you'd need to see this under as controlled / repeated conditions for an apples-to-apples comparison. Plus, the old saying is true both ways: You can't get in what you can't get out... |
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