Stock 1LE big loss of power

Tigerflyboy · 04-11-2021, 09:42 PM

Hey Guys,

I've been lurking for a while so thanks ahead of time for the answers. I have 2018 ZL1 1LE with 5000 miles that I do HPDE events. Anyway I have lost a bunch of power for no reason. I went from doing 151mph at Roebling Road to now topping out at 135mpg. Same warm weather and same settings on PTM, ETC. It just feels like I have 150HP less!!! Today a Ford Mustang Shelby 350 was drafting behind me. Usually not even close. No codes, three tanks of gas from different locations and it runs/sounds fine. Going to a dealer tomorrow, but has anyone had the same problem?

Vigilante375 · 04-11-2021, 10:42 PM

Maybe you have air in the supercharger coolant lines. Many of us have gone out and purchased a aftermarket solution for a supercharger coolant reservoir as that will make sure the line is always clear of any air.

You can go to the dealer and see if they can perform a bleed for the supercharger or do it yourself. As this will make the car feel sluggish with no codes or anything.

Tigerflyboy · 04-11-2021, 10:48 PM

Quote:

Originally Posted by Vigilante375

Maybe you have air in the supercharger coolant lines. Many of us have gone out and purchased a aftermarket solution for a supercharger coolant reservoir as that will make sure the line is always clear of any air.

You can go to the dealer and see if they can perform a bleed for the supercharger or do it yourself. As this will make the car feel sluggish with no codes or anything.

Hmmmm I'm new to the LT4 and that makes sense. The red reservoir on the passenger side was of the engine was almost empty recently. That was after sitting for 6 months.

Camaro1973 · 04-11-2021, 11:16 PM

Quote:

Originally Posted by Tigerflyboy

Hmmmm I'm new to the LT4 and that makes sense. The red reservoir on the passenger side was of the engine was almost empty recently. That was after sitting for 6 months.

That is engine coolant not SC coolant. Intercooler is also a closed loop separate from engine coolant. Stock its a pain in the ass to bleed.

If you have the ability to log with hp tuners, you can check your IAT/MAT temps which would confirm if you have a heat soak type of issue.

Gunkk · 04-12-2021, 01:44 AM

Quote:

Originally Posted by Tigerflyboy

Hey Guys,

I've been lurking for a while so thanks ahead of time for the answers. I have 2018 ZL1 1LE with 5000 miles that I do HPDE events. Anyway I have lost a bunch of power for no reason. I went from doing 151mph at Roebling Road to now topping out at 135mpg. Same warm weather and same settings on PTM, ETC. It just feels like I have 150HP less!!! Today a Ford Mustang Shelby 350 was drafting behind me. Usually not even close. No codes, three tanks of gas from different locations and it runs/sounds fine. Going to a dealer tomorrow, but has anyone had the same problem?

#1 cause of loss of power: Air in the supercharger coolant loop. Even though it's a closed loop, water will slowly evaporate out over time.

There's no easy access tank to add fluid into, but there is a fitting. No need to visit the dealer if you are good with tools:
https://www.camaro6.com/forums/showp...8&postcount=12

If not, you can buy one of these for $15 and use a 2L bottle as a funnel:
https://dedicatedmotorsports.com/lt4...-adapter-tool/

Jaxcam02 · 04-12-2021, 07:23 AM

Or you can add a supercharger reservoir.

https://www.camaro6.com/forums/showthread.php?t=588728

KingLT1 · 04-12-2021, 07:49 AM

If you would rather have Black there is this option as well.

https://boostdistrict.com/products/s...SABEgL0MvD_BwE

Wuiquen · 04-15-2021, 09:00 PM

If I use the aftermarket adapter and use the bottle as a funnel, how do I refill it? Do I just add coolant to the bottle and run the car until no more coolant goes in? How long do I run the car for?

Camaro1973 · 04-15-2021, 09:23 PM

Quote:

Originally Posted by Wuiquen

If I use the aftermarket adapter and use the bottle as a funnel, how do I refill it? Do I just add coolant to the bottle and run the car until no more coolant goes in? How long do I run the car for?

You can run the car, or do like I do and jump the intercooler pump circuit.

Stephen12ZL1 · 04-15-2021, 09:47 PM

it is definitely air in the intercooler circuit...get a reservoir ASAP

Wuiquen · 04-15-2021, 10:40 PM

Quote:

Originally Posted by Camaro1973

You can run the car, or do like I do and jump the intercooler pump circuit.

How would I jump the intercooler pump circuit?

Sent from my moto g(7) power using Tapatalk

04-12-2021, 07:23 AM	#6
Jaxcam02 Drives: 2017 Silverado/2017 ZL1 Join Date: Aug 2019 Location: Jax/Palatka FL Posts: 1,090	Or you can add a supercharger reservoir. https://www.camaro6.com/forums/showthread.php?t=588728 __________________

04-12-2021, 07:49 AM	#7
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 6,798	If you would rather have Black there is this option as well. https://boostdistrict.com/products/s...SABEgL0MvD_BwE __________________ 2016 NFG 1SS A8 Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA

04-15-2021, 09:00 PM	#8
Wuiquen Drives: 2018 Hot Red ZL1 Join Date: Nov 2010 Location: Los Angeles, CA Posts: 3,599	If I use the aftermarket adapter and use the bottle as a funnel, how do I refill it? Do I just add coolant to the bottle and run the car until no more coolant goes in? How long do I run the car for? __________________

04-15-2021, 09:47 PM	#10
Stephen12ZL1 Drives: '21 ZLE A10 Join Date: May 2012 Location: Mechanicsville, VA Posts: 6,808	it is definitely air in the intercooler circuit...get a reservoir ASAP __________________ '21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60' '17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)

04-11-2021, 09:42 PM	#1
Tigerflyboy Drives: Chevy Camaro ZL1 1LE,AMG GTS, 94 Join Date: Mar 2021 Location: Jacksonville,FL Posts: 3	Stock 1LE big loss of power Hey Guys, I've been lurking for a while so thanks ahead of time for the answers. I have 2018 ZL1 1LE with 5000 miles that I do HPDE events. Anyway I have lost a bunch of power for no reason. I went from doing 151mph at Roebling Road to now topping out at 135mpg. Same warm weather and same settings on PTM, ETC. It just feels like I have 150HP less!!! Today a Ford Mustang Shelby 350 was drafting behind me. Usually not even close. No codes, three tanks of gas from different locations and it runs/sounds fine. Going to a dealer tomorrow, but has anyone had the same problem?

04-11-2021, 10:42 PM	#2
Vigilante375 Drives: 2018 Camaro ZL1 Join Date: Aug 2018 Location: Georgia Posts: 1,369	Maybe you have air in the supercharger coolant lines. Many of us have gone out and purchased a aftermarket solution for a supercharger coolant reservoir as that will make sure the line is always clear of any air. You can go to the dealer and see if they can perform a bleed for the supercharger or do it yourself. As this will make the car feel sluggish with no codes or anything.

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