Power dip

Kerry · 07-20-2022, 10:06 AM

Anyone can help me understand or what to do. I get this dip at the top end.
2 different dynos same thing
I see a slight dip in logs but cant feel it on the street.

LT1ornothing · 07-20-2022, 01:29 PM

Still running the P1SC head unit and meth injected? If yes, probably high IATs and flooding the manifold with meth. King did some IAT comparisons between his friend's P1SC compared to his whipple and verified that the P1SC was putting out some seriously high IATs.

Kerry · 07-20-2022, 02:02 PM

around 100 no timing pulled drops to about 75 on pull from the meth 27000 on the clock now started at about 7. It gets run very hard but anyway any and all input welcome.

asthmamax11 · 07-20-2022, 02:06 PM

Quote:

Originally Posted by Kerry

around 100 no timing pulled drops to about 75 on pull from the meth 27000 on the clock now started at about 7. It gets run very hard but anyway any and all input welcome.

Is that logged on the dyno or the street ?

Kerry · 07-20-2022, 03:23 PM

Quote:

Originally Posted by asthmamax11

Is that logged on the dyno or the street ?

all 3

Joshinator99 · 07-20-2022, 07:44 PM

Out of curiosity, are you seeing anything else in your HP Tuners charts dipping at the same time (fuel pressure low or high, timing, commanded torque) or KR spikes? Usually when that stuff happens there will be a correlating factor elsewhere.

KingLT1 · 07-21-2022, 08:56 AM

See if it repeats on the Dyno. My brothers ZL1 showed the same Dip on one pull and everything in the log looked fine.

Kerry · 07-21-2022, 06:48 PM

Yes it does. 2 different dynos. The log does not look anywhere as dramatic as you would think. I see it drop like maybe 50 60 rpms then build back up right before shift

Kerry · 07-21-2022, 07:14 PM

Maybe I dont have the car set up right. How should I do it, not many around here know anything about this car. I basically was doing it on my own.
I did traction control one push off and put in manual shift one dyno in 6th. The one u see then later another dyno in 5th. Added speed works headers got 685 but my meth was not working right, and different dyno.

ZLAV1N · 07-21-2022, 07:59 PM

So ironically enough, I had this same exact conversation with my builder/tuner at Katech. I am picking up my ZL1 next week but I got the dyno graph today (see attached).

What I was told is this :

"That’s actually the oil pump solenoid tuning on. It creates a momentary dip in the power.

There are certain parameters that it has to hit for the solenoid to turn on. One is oil temp. If he cooled it down a bunch and made another pass it would likely get rid of that but it doesn’t effect power so there isn’t a need to do that."

From my understanding the car drives amazingly well & all other data that was shown during the tune is exactly where it's supposed to be. Katech has been nothing but stellar to this point and this is my 2nd round of mods to my ZL1 with them. The first time everything was absolutely flawless. We'll see when I get the car but I have zero worries and high expectations.

FYI, I have the Katech Billet LT1/LT4 Wet Sump Oil Pump in my ZL1 as well.

Kerry · 07-21-2022, 10:39 PM

interesting great power by the way. Bet that car is a beast wow.
I notice that it happens right at the same rpm just after 6000.
thanks for sharing that. I guess mine is not the only one but I see tons like on youtube that dont do that.

s346k · 07-22-2022, 05:54 AM

my na car did the same thing around 6100 rpm. it consistently lost 5-6 hp. tuner said it was the oil pump.

Kerry · 09-13-2022, 07:16 PM

so I rn across this by accident today.

Now for the results I dyno’d the car earlier in the day with stock Ported intake and don’t mind the dip after 5900 on the lt1 run. I forgot to bump the shifter out of tutd before 5900 with these 10 speeds it will drop a clutch to anticipate the shift you can see it grab back after I bumped it over.

https://www.camaro6.com/forums/showt...ght=lt2+spacer

JimGnitecki · 10-01-2022, 06:59 AM

That dip IS there even on my 2022 LT1 that just got the 2650 Magnuson kit installed a couple days ago at Davenport. No other mods on the car other than the kit. Here is the dyno chart. Note that the run was made at 3557 foot elevation in Calgary, Alberta, Canada, and I'm not sure that the SAE correction formula can give totally accurate results at that elevation. (Note the obscene correction factor)

Jim G

07-20-2022, 10:06 AM	#1
Kerry Drives: 2019 2SS Camaro Join Date: Apr 2012 Location: Al Posts: 828	Power dip Anyone can help me understand or what to do. I get this dip at the top end. 2 different dynos same thing I see a slight dip in logs but cant feel it on the street. Attached Images

07-20-2022, 07:44 PM	#6
Joshinator99 Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018 Location: Petersham MA Posts: 4,741	Out of curiosity, are you seeing anything else in your HP Tuners charts dipping at the same time (fuel pressure low or high, timing, commanded torque) or KR spikes? Usually when that stuff happens there will be a correlating factor elsewhere. __________________ 2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion *1059 WHP/944 WTQ, 9.48@150*

07-21-2022, 08:56 AM	#7
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 6,793	See if it repeats on the Dyno. My brothers ZL1 showed the same Dip on one pull and everything in the log looked fine. __________________ 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

07-21-2022, 07:59 PM	#10
ZLAV1N Previously CS10SS Drives: 2017 ZL1 A10 Join Date: Jan 2017 Location: Toledo, OH Posts: 293	So ironically enough, I had this same exact conversation with my builder/tuner at Katech. I am picking up my ZL1 next week but I got the dyno graph today (see attached). What I was told is this : "That’s actually the oil pump solenoid tuning on. It creates a momentary dip in the power. There are certain parameters that it has to hit for the solenoid to turn on. One is oil temp. If he cooled it down a bunch and made another pass it would likely get rid of that but it doesn’t effect power so there isn’t a need to do that." From my understanding the car drives amazingly well & all other data that was shown during the tune is exactly where it's supposed to be. Katech has been nothing but stellar to this point and this is my 2nd round of mods to my ZL1 with them. The first time everything was absolutely flawless. We'll see when I get the car but I have zero worries and high expectations. FYI, I have the Katech Billet LT1/LT4 Wet Sump Oil Pump in my ZL1 as well. Attached Images __________________ '02 Trans AM - sold '05 SRT4 - sold '05 STI - sold '96 300ZX - sold '10 2SS/RS M6 455rwhp - sold '13 ZL1 M6 720rwhp - sold '17 ZL1 A10 930rwhp - Katech Built Last edited by ZLAV1N; 07-21-2022 at 08:35 PM. Reason: More Information

07-22-2022, 05:54 AM	#12
s346k Drives: like an old lady Join Date: Jun 2012 Location: indiana Posts: 2,395	my na car did the same thing around 6100 rpm. it consistently lost 5-6 hp. tuner said it was the oil pump. __________________ 2016+ camaro: everyone’s first car

07-20-2022, 01:29 PM	#2
LT1ornothing Drives: 2020 LT1 M6 Join Date: Jan 2016 Location: South, the DEEP south Posts: 1,114	Still running the P1SC head unit and meth injected? If yes, probably high IATs and flooding the manifold with meth. King did some IAT comparisons between his friend's P1SC compared to his whipple and verified that the P1SC was putting out some seriously high IATs.

07-20-2022, 02:02 PM	#3
Kerry Drives: 2019 2SS Camaro Join Date: Apr 2012 Location: Al Posts: 828	around 100 no timing pulled drops to about 75 on pull from the meth 27000 on the clock now started at about 7. It gets run very hard but anyway any and all input welcome.

07-21-2022, 06:48 PM	#8
Kerry Drives: 2019 2SS Camaro Join Date: Apr 2012 Location: Al Posts: 828	Yes it does. 2 different dynos. The log does not look anywhere as dramatic as you would think. I see it drop like maybe 50 60 rpms then build back up right before shift

07-21-2022, 07:14 PM	#9
Kerry Drives: 2019 2SS Camaro Join Date: Apr 2012 Location: Al Posts: 828	Maybe I dont have the car set up right. How should I do it, not many around here know anything about this car. I basically was doing it on my own. I did traction control one push off and put in manual shift one dyno in 6th. The one u see then later another dyno in 5th. Added speed works headers got 685 but my meth was not working right, and different dyno.

07-21-2022, 10:39 PM	#11
Kerry Drives: 2019 2SS Camaro Join Date: Apr 2012 Location: Al Posts: 828	interesting great power by the way. Bet that car is a beast wow. I notice that it happens right at the same rpm just after 6000. thanks for sharing that. I guess mine is not the only one but I see tons like on youtube that dont do that.

09-13-2022, 07:16 PM	#13
Kerry Drives: 2019 2SS Camaro Join Date: Apr 2012 Location: Al Posts: 828	so I rn across this by accident today. Now for the results I dyno’d the car earlier in the day with stock Ported intake and don’t mind the dip after 5900 on the lt1 run. I forgot to bump the shifter out of tutd before 5900 with these 10 speeds it will drop a clutch to anticipate the shift you can see it grab back after I bumped it over. https://www.camaro6.com/forums/showt...ght=lt2+spacer

10-01-2022, 06:59 AM	#14
JimGnitecki Drives: Chevrolet Camaro LT1 Join Date: Sep 2022 Location: Alberta Posts: 336	That dip IS there even on my 2022 LT1 that just got the 2650 Magnuson kit installed a couple days ago at Davenport. No other mods on the car other than the kit. Here is the dyno chart. Note that the run was made at 3557 foot elevation in Calgary, Alberta, Canada, and I'm not sure that the SAE correction formula can give totally accurate results at that elevation. (Note the obscene correction factor) Jim G Attached Images

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