Horrible gmpp tune

appleman22 · 07-11-2018, 07:17 AM

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?

Mark114 · 07-11-2018, 07:45 AM

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.

appleman22 · 07-11-2018, 07:53 AM

Honestly I would be happy to reinstall the factory air box. The gm tune and intake makes less power then a stock 1le.

6spdhyperblue · 07-11-2018, 08:22 AM

How scientific

appleman22 · 07-11-2018, 08:24 AM

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!

6spdhyperblue · 07-11-2018, 08:25 AM

Post it up.

appleman22 · 07-11-2018, 08:33 AM

https://www.camaro6.com/forums/showt...=500822&page=5

Read post #69

6spdhyperblue · 07-11-2018, 11:42 AM

Is that SAE?

appleman22 · 07-11-2018, 12:30 PM

No clue. That was from the previous owner

SomeGeoffGuy · 07-11-2018, 04:25 PM

Go check the install. The alignment between the MAF tube, filter, and box are critical.

-Geoff

Curr · 07-12-2018, 06:47 AM

My butt dyno thinks that the car feels the same, with more some more pop and gurgles.

It definitely does not feel weaker.

Poppacapp · 07-13-2018, 12:10 AM

Quote:

Originally Posted by appleman22

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!

Done on the same dyno in similar conditions?

protovack · 07-13-2018, 01:49 AM

They must have done something wrong. Mine feels livelier (and louder) with the GM CAI and tune.

RUQWIKR · 07-13-2018, 07:54 AM

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...

07-11-2018, 07:17 AM	#1
appleman22 Drives: 2017 1ss 1le Join Date: Sep 2015 Location: new york Posts: 436	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, 08:22 AM	#4
6spdhyperblue Drives: 6th gen Join Date: Aug 2013 Location: US Posts: 3,670	How scientific __________________ ‘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, 11:42 AM	#8
6spdhyperblue Drives: 6th gen Join Date: Aug 2013 Location: US Posts: 3,670	Is that SAE? __________________ ‘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, 04:25 PM	#10
SomeGeoffGuy Drives: 2023 2SS Convertible Join Date: May 2009 Location: Metro Detroit Posts: 1,057	Go check the install. The alignment between the MAF tube, filter, and box are critical. -Geoff __________________ '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
Curr Probably doesn't like you Drives: 2022 WCT ZL1 M6 Join Date: Jun 2015 Location: Boston-ish Posts: 1,247	My butt dyno thinks that the car feels the same, with more some more pop and gurgles. It definitely does not feel weaker. __________________ 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.

07-11-2018, 07:45 AM	#2
Mark114 Drives: 2016 2SS Convertible Join Date: May 2012 Location: St. Louis, MO Posts: 1,710 View My Garage	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.

07-11-2018, 07:53 AM	#3
appleman22 Drives: 2017 1ss 1le Join Date: Sep 2015 Location: new york Posts: 436	Honestly I would be happy to reinstall the factory air box. The gm tune and intake makes less power then a stock 1le.

07-11-2018, 08:24 AM	#5
appleman22 Drives: 2017 1ss 1le Join Date: Sep 2015 Location: new york Posts: 436	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!

07-11-2018, 08:25 AM	#6
6spdhyperblue Drives: 6th gen Join Date: Aug 2013 Location: US Posts: 3,670	Post it up. __________________ ‘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
appleman22 Drives: 2017 1ss 1le Join Date: Sep 2015 Location: new york Posts: 436	https://www.camaro6.com/forums/showt...=500822&page=5 Read post #69

07-11-2018, 12:30 PM	#9
appleman22 Drives: 2017 1ss 1le Join Date: Sep 2015 Location: new york Posts: 436	No clue. That was from the previous owner

07-13-2018, 01:49 AM	#13
protovack Drives: 2019 2LT 2.0T M6 Riverside Blue Join Date: Jan 2018 Location: WA Posts: 847	They must have done something wrong. Mine feels livelier (and louder) with the GM CAI and tune.

07-13-2018, 07:54 AM	#14
RUQWIKR Drives: 1LEs Join Date: May 2009 Location: DFW - Texas Posts: 1,319	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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