Cammed l99 rpm issues - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Taylor1993 · 04-26-2022, 02:36 AM

I have a 2010 ss camaro with the l99 auto. Recently had a btr stage 2 cam installed with a circle d triple disc 2800-3000 stall convertor. Also had heads port and polished. Doesnt do this all the time but every once in a while the car will stall out when putting it in drive. Also does the same when putting it in reverse. Seems to do it alot more in reverse. Doesnt do it when applying throttle tho. The car also surges when decelerating. Anybody have any ideas on what might be causing this? A buddy said to check rpm idle, but it idles around 750 to 850 or so. Also the rpms are never steady. They are always bouncing up and down constantly at all speeds. Is this normal in a cammed car? Retune? Vaccume leak? Any help is greatly appreciated thanks in advance

morepowerjoe · 04-26-2022, 05:55 AM

The surging might be the lock up converter which you can have tuned out of all the gears you want to. I have mine set to not lock up until 5th and 6th. As for the other issues that you talk about are all tuning issues that need to be addressed by your tuner.

Armyavi8r · 04-26-2022, 02:16 PM

My SS3 VVT cam with 36-3800 stall surges occasionally after a warm start until first throttle application. GPI tuner (Ben) couldn't work that out but not really a big deal. Mine is set to idle at about 850 rpms once warm. Never experienced it stalling out. Mine bucks a little when decelerating from 40 to 20 mph or so, but that's normal. RPMs always steady once warm. It sounds like your problems can probably be tuned out mostly.

Modernmusclecar · 04-26-2022, 03:25 PM

Cam Motion cam and 3200 Circle D stall. Have some surging at 1000rpm...but never stalled.

acammer · 04-27-2022, 06:23 AM

Tuning issues... driveability takes lots of time to really get perfect. Some are more sensitive than others.

TheFlyingBananaSS · 04-27-2022, 06:25 AM

Definitely your tune.

1JEWLDSSRS · 04-27-2022, 07:21 AM

Quote:

Originally Posted by acammer

Tuning issues... driveability takes lots of time to really get perfect. Some are more sensitive than others.

^^^ This, it is all in the tune, and as cammer said, sometimes it takes a bit of time to work out the "driveability" on the dyno, so the driving on the street will be clean and smooth. My Camaro drives like a dream with the big cam and stall, never had any issues with stalling and bucking no matter how fast or slow I'm going. Sounds like a converter lockup/unlock timing issue. Good luck.

pyroguy · 04-27-2022, 07:32 AM

Definitely sounds like a tune issue to me, especially the stalling out part. I have a BTR stage 2 cam and while I’m still running a stock converter, it doesn’t want to die on me. It will buck a little <5mph, but that’s partially the stall and I think partially the tune on mine. I’d go back and have them retune yours for sure.

04-26-2022, 02:36 AM	#1
Taylor1993 Drives: Chevy Camaro ss Join Date: May 2019 Location: Maryland Posts: 4	Cammed l99 rpm issues I have a 2010 ss camaro with the l99 auto. Recently had a btr stage 2 cam installed with a circle d triple disc 2800-3000 stall convertor. Also had heads port and polished. Doesnt do this all the time but every once in a while the car will stall out when putting it in drive. Also does the same when putting it in reverse. Seems to do it alot more in reverse. Doesnt do it when applying throttle tho. The car also surges when decelerating. Anybody have any ideas on what might be causing this? A buddy said to check rpm idle, but it idles around 750 to 850 or so. Also the rpms are never steady. They are always bouncing up and down constantly at all speeds. Is this normal in a cammed car? Retune? Vaccume leak? Any help is greatly appreciated thanks in advance

04-26-2022, 05:55 AM	#2
morepowerjoe Drives: 2012 Chevrolet Camaro l99 Join Date: Aug 2020 Location: Austin, TX Posts: 2,105	The surging might be the lock up converter which you can have tuned out of all the gears you want to. I have mine set to not lock up until 5th and 6th. As for the other issues that you talk about are all tuning issues that need to be addressed by your tuner. __________________ DSS FX Forged Pistons, Eagle ESP L19 Forged Rods, ARP Head and Main Studs, TSP PRC 260 CNC Ported Heads milled .030, Cometic .040 Head Gaskets, GPI SS3 VVT Camshaft, GM Performance Racing Lifters, CHE Trunnions , Molly Pushrods, Melling 10355HV Oil Pump, Cold Air Inductions CAI, Fast LSXR Intake Manifold, Nick Williams 103 TB, TSP 1 7/8" Longtubes with 3" TSP Exhaust, ZL1 Fuel Pump, Mishimoto Radiator, Mishimoto Oil Cooler, Tru Cool 40k Tranny Cooler, 3600 Circle D Converter, Fluid Dynamics Balancer Build Thread https://www.camaro5.com/forums/showthread.php?t=609817

04-26-2022, 02:16 PM	#3
Armyavi8r Drives: 2010 Camaro 2SS/RS A6 Join Date: Jul 2021 Location: Little Rock, AR Posts: 76	My SS3 VVT cam with 36-3800 stall surges occasionally after a warm start until first throttle application. GPI tuner (Ben) couldn't work that out but not really a big deal. Mine is set to idle at about 850 rpms once warm. Never experienced it stalling out. Mine bucks a little when decelerating from 40 to 20 mph or so, but that's normal. RPMs always steady once warm. It sounds like your problems can probably be tuned out mostly. __________________ 2010 2SS/RS A6. GPI SS3 VVT Cam, 228/246 / AFM Delete / Circle D 4C 36-3800 Stall / Stainless Works LTHs, High Flow Cats, X-pipe, Borla Pro XS Mufflers and Quad Tips / Vararam CAI / Soler 95mm PTB / AAM 3.91 gear / GPI Ported Heads / GPI Ported Rod Mod Intake Manifold/ Smith Bros. Trunnions / GPI 5/16" hardened push rods, 7.425"/ Chevrolet Racing Lifters / Melling 10355 Oil Pump / Powermaster XS Torque Starter / Derale Xmsn Cooler / 1LE Suspension Upgrade System / BMR Strut Tower Brace, Trailing Arms and Toe Rods / Powerbond 25% UDP / Mishimoto catch can / iDatalink Maestro.

04-26-2022, 03:25 PM	#4
Modernmusclecar Drives: 2011 Camaro SS Join Date: Jul 2019 Location: Parts unknown Posts: 820	Cam Motion cam and 3200 Circle D stall. Have some surging at 1000rpm...but never stalled. __________________ EPS CUSTOM GRIND CAM....K@N CAI....VMAX PTB.....FRANKENSTEIN STAGE 2 HEADS ...1 7/8 STAINLESS POWER CATTED LONGTUBE HEADERS...CORSA XTREME 3 INCH CATBACK.....CIRCLE D 3800 Pro Series stall...391 gears.....Ported/modded GPI intake .Forgestar drag pack with Mickey Thompson ET street drag radials AGP PERFORMANCE DYNO TUNED. 463 WHP 428 FTLBS TORQUE.

04-27-2022, 06:23 AM	#5
acammer GPI Sales Consultant Drives: 2011 Camaro 2SS SGM Join Date: Jul 2016 Location: Weedsport, NY Posts: 2,794 View My Garage	Tuning issues... driveability takes lots of time to really get perfect. Some are more sensitive than others. __________________ GPI Max Package 2.0: Brodix BR7 heads/GPI porting, MAX3 cam, ST2116LSR, BSR Max Lift rockers, LS7 LSXR with 103mm TB, Vararam OTR, Mcleod RXT, G-Force/Strange 9" IRS setup with 4.63 gear. 551whp, 11.1@124mph. *Got a question about a GPI product? Feel free to shoot me a message!*

04-27-2022, 06:25 AM	#6
TheFlyingBananaSS Evil Genius of Chevrolet Drives: 2017 Z06, 2019 XTS, 2013 SS Join Date: Feb 2017 Location: New York Posts: 3,260	Definitely your tune. __________________ GPI SS2 VVT cam, ECS Novi 1500 supercharger, Corsa Extreme, Detroit Speed and BMR suspension, Circle D triple disc, Melling oil pump, LS2 chain tensioner, ATI 10% UD, DSX E85 kit, High Energy coils, BTR springs, LS2 Lifter trays, Titanium retainers, hardened push rods, FIC 1000 injectors, ZL1 pump, Mighty Mouse catch can, AEM gauges, Tial BOV, Richmond 3.91 gears, Custom gauge bezels, Speed Engineering headers, Stainless Works HF cats, DSX Aux pump, 710rwhp on E85.

04-27-2022, 07:32 AM	#8
pyroguy Started#gottalovethatblue Drives: ABM #831 Join Date: Apr 2013 Location: TN Posts: 6,919 View My Garage	Definitely sounds like a tune issue to me, especially the stalling out part. I have a BTR stage 2 cam and while I’m still running a stock converter, it doesn’t want to die on me. It will buck a little <5mph, but that’s partially the stall and I think partially the tune on mine. I’d go back and have them retune yours for sure. __________________ '10 Camaro 2SS/RS \| Aqua Blue #831 of 3,903 \| Silver Stripes Check out my build thread