02-02-2020, 06:59 AM | #1 |
Drives: 2018 Camaro 2SS 1LE Join Date: Jun 2019
Location: edmond Oklahoma
Posts: 15
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Tuning help
Hey All, so we did our 1st build and we are super close to tuning it but just can’t seem to get it absolutely perfect. We are using HP Tuners and what’s happening is we are getting some cracking/popping at acceleration 40% and above throttle at random times. One pull on the street will do it and the next it won’t. At long idle sitting at red light when I go to take off sometimes care will pop,crackle and then I will lose rev match. I wanted to know if anyone has this close of a similar build and would be willing to share tune or input?
Here are the following mods..... Speed engineering long tube headers 1 7/8” and catless pipes Corsa sport exhaust Phastek flex fuel system Abel Racing catch can Precision Race Components CNC Ported 2014+ LT1 Cylinder Heads, GM Castings Texas Speed & Performance Gen 5 LT1 special grind Camshaft for road course Texas Speed & Performance 7.85" Pushrod, 3/8" Diameter with 5/16" Ball Ends, Per Pushrod 4 Degree Phaser Limiter Texas Speed & Performance Gen 5 LT1, DOD Delete Kit DOD Hole Plug ARP SBC 6.2L LT1 Head Bolt Kit Without Corner Bolts GM LS2 Lifter Tray Comp Cams OE-Replacement Hydraulic Roller Lifters, SBC & LS1 GM MLS Head Gasket LT1 VVT CAMSHAFT BOLT / VALVE GM Wet Sump Balancer Pulley Bolt Water Pump Gasket GM Front CRANK Seal MSD Atomic AirForce LT1 Intake Manifold, 103mm, Red Lettering HolleyDays Match Nick Williams 103mm LTx Throttle Body Machined Finish McLeod 6406807M RXT Twin Disc Clutch Kit With Steel Flywheel BC Forged TD01 Thank you 👍👊🇺🇸🤘🏎🏁 |
02-02-2020, 11:32 AM | #2 |
Drives: 17 2SS, 8L90, Cam, Heads, E85 Join Date: Dec 2016
Location: US
Posts: 1,196
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What is timing doing? Can you post a log? I just put a Stage 1/2 cam in my car and I am seeing a considerable timing pull, especially at WOT, but its not showing up on the timing indicators (torque mng. advance, IAT advance, etc.)
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02-03-2020, 07:56 PM | #3 |
Drives: 17 Camaro SS Join Date: Nov 2019
Location: Central VA
Posts: 117
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No expert here but is it popping through the intake or exhaust.. If it's popping through the intake the timing is too high. Exhaust too low. Check the Knock Retard. If you have a bunch it too much advance timing.
Just trying to help but like I said no expert. But I am learning
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Flow Tech axle back, Roto-Fab, Nick Williams 103, AEM Wide Band, Defrost vent pod, billet catch can, BBK long tube headers and NGK LTR6GP, #90198, one step colder, Magnuson 2650, Snow Performance water/methanol injection. (Also tune myself w/HPTuners)
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02-04-2020, 08:36 AM | #4 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,764
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It could be lean if it is popping through the intake.
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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 |
02-05-2020, 01:18 PM | #5 |
Drives: 2018 Camaro 2SS 1LE Join Date: Jun 2019
Location: edmond Oklahoma
Posts: 15
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I don’t have the computer my buddy does, we think it’s too much negative timing creating the popping out of the exhaust. We are gonna tune again on Saturday and hopefully we can figure it out
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02-05-2020, 01:20 PM | #6 | |
Drives: 2018 Camaro 2SS 1LE Join Date: Jun 2019
Location: edmond Oklahoma
Posts: 15
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Quote:
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02-05-2020, 01:21 PM | #7 |
Drives: 2018 Camaro 2SS 1LE Join Date: Jun 2019
Location: edmond Oklahoma
Posts: 15
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02-12-2020, 09:18 AM | #8 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,764
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You sure it's not misfiring?
You mid try getting rid of all the negative spark in the base/minimum tables and see if that helps.
__________________
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 |
02-18-2020, 07:52 PM | #9 |
Drives: 17 2SS, 8L90, Cam, Heads, E85 Join Date: Dec 2016
Location: US
Posts: 1,196
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Here is the tune i've got so far for my TSP Stage 1/2 (228/236-114 LSA 111 ICL .635/.635) and PRC ported heads with ported intake, TB, and Rotofab.
I guess its safe to posts tunes, some people don't like to, I know its got my VIN# and everything but I guess that's not really an issue. I would way rather let you have it and help you out then another one of these "tuners" take advantage of someone since it happened to me haha. I'm not sure how big your cam is but I think you could probably copy the same parameters I have adjusted to your tune and run it, our builds look similar minus the headers but I don't think that will change a lot. Let me know how it runs. I know tuning mine I was surprised how much of a difference just slight changes in AFR make, I definitely made the mistake of underestimating a correct AFR. I accomplished my tuning through the VVE only and I didn't touch the MAF calibration. A lot of "tuners" will tell you that you are stupid and you shouldn't be messing with VVE and you should work around everything by tuning the MAF only. In my opinion if you still have a stock intake and haven't altered the airflow around the MAF you can use the stock calibration unless you get into very higher airflow where the stock calibration loses resolution and isn't defined very well. Fifty Tune Modified ECM_TCM_FICM.zip |
02-18-2020, 08:05 PM | #10 |
Drives: 2016 Camaro 2SS Join Date: Apr 2017
Location: Stansbury Park, Utah
Posts: 1,087
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Can't see any ECM info. Tried ver 4.4.4 and the beta. No go. I did see TCM info.
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2016 2SS, MRC, NPP, A8. Procharger P-1X,Stage II,std bypass, 3.9, Alky Meth - 10.84 @129 - DA+2000
New Mods - GPI drop ins, Kooks 2", LT4 fueling, Cam, Circle D Converter, 3.5 pulley & dual nozzle meth. |
02-18-2020, 08:41 PM | #11 | |
Drives: 17 2SS, 8L90, Cam, Heads, E85 Join Date: Dec 2016
Location: US
Posts: 1,196
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Quote:
Also by the way, i'm not the OP, I just posted my tune file so the OP could look at it and see what I changed. Unless you just wanted to look at my tune? thats fine, its good to share tunes around here so people can learn if they are willing to put in the time and effort. |
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02-18-2020, 09:36 PM | #12 |
Drives: 2016 Camaro 2SS Join Date: Apr 2017
Location: Stansbury Park, Utah
Posts: 1,087
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I know. I like to look at tune files, check out the differences.
__________________
2016 2SS, MRC, NPP, A8. Procharger P-1X,Stage II,std bypass, 3.9, Alky Meth - 10.84 @129 - DA+2000
New Mods - GPI drop ins, Kooks 2", LT4 fueling, Cam, Circle D Converter, 3.5 pulley & dual nozzle meth. |
02-24-2020, 03:08 PM | #13 | |
Drives: 2018 Camaro 2SS 1LE Join Date: Jun 2019
Location: edmond Oklahoma
Posts: 15
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Quote:
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02-27-2020, 05:57 PM | #14 |
Drives: 17 2SS, 8L90, Cam, Heads, E85 Join Date: Dec 2016
Location: US
Posts: 1,196
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I would watch out, just when you think you have everything working, a random limiter or timing pull will come from nowhere and ruin your day when you need your car the most.
How did you add fuel to the idle? I guess you are running open loop? |
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