GPI Build Journey - Page 6 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

LCPLPunk · 09-06-2021, 08:27 PM

Hell ya man! For suspension, definitely #1 in my book is the solid subframe bushings! (either solid poly or solid solid).

I have roughly that same exhaust setup (except no cats), and I agree, I think it's the best! Zero drone, nasty at WOT, great at idle!

As far as numbers, ya...I'd be pissed with them that low. Maybe it's a different type of dyno??

wasthatacop? · 09-06-2021, 10:54 PM

I respect you not wanting to do the work yourself. I have an L99 too. I'm jealous of your upgrades.

Armyavi8r · 09-07-2021, 12:06 PM

Quote:

Originally Posted by 1JEWLDSSRS

Awesome stuff my friend!!! Well done. Yep, there's nothing quite like the sound and performance of a cammed up 5th gen on the street!! And like you said, the "butt dyno" is what you go by, not the mechanical dyno, it's just a tool for tuning, I got over that. lol. The only thing that counts is YOUR happiness with the car and how she performs. The part that I like is when you first start her up and that cam starts loping all over and the sound is just pure sex!!! My buddy did the same thing with his cammed/whippled Camaro with the exhaust like yours, and I gotta say it DOES sound amazing thru the stock mufflers. You know its there, but not raspy and loud like my Corsa. I actually like the way his sounds.. Good luck and lots of smiles per mile!!!

Totally agree. Thanks, so far it's been fun seeing all this through. Driving it is just phenomenal fun.

Armyavi8r · 09-07-2021, 12:45 PM

One installation concern I'm trying to get answers on is the placement of the transmission cooler- right in front of the Vararam scoop. Seems like that would rob it of the ram air it's designed to catch. Thoughts?

Armyavi8r · 11-13-2021, 09:42 PM

A couple times recently on start up, I've experienced difficulty turning over, and then when it does, the engine idles around 1200 (usually idles around 850) and then when I increase throttle, it'll run up to 2000-2200 and hang there, not coming down unless I turn off the ignition. Each time it returned to normal after a few starts. But the first time, I tried to drive it that way and it was almost undrivable. I'll consult with GPI next week. Most of the time it starts and runs just as it was tuned (GPI). But it has done this twice. Any ideas?

morepowerjoe · 11-14-2021, 01:51 AM

It sounds like a tune problem to me.

Armyavi8r · 11-14-2021, 01:42 PM

Now it starts hard, then finally fires up and goes straight to 2000 rpms every time. Throwing a CEL with P1400 code.

morepowerjoe · 11-14-2021, 02:05 PM

That's odd, because the P1400 code is for the differential pressure feedback or egr circuit low input which makes no sense because we don't have an egr. So it must be the diff pressure and I have no clue on what that is. I would just wait until you speak to GPI. It's got to be in the tune.

camguynj · 11-14-2021, 02:55 PM

Quote:

Originally Posted by Armyavi8r

Now it starts hard, then finally fires up and goes straight to 2000 rpms every time. Throwing a CEL with P1400 code.

I’d check the TB and MAF

P1400 CHEVROLET Code - Cold Start Emission Reduction Control System
Possible causes:
Dirty Throttle Body, Dirty Air Filter, Dirty Mass Air Flow (MAF),Sensor Intake manifold leak,Exhaust leak, Damaged, restricted, modified or enhanced exhaust system

morepowerjoe · 11-14-2021, 03:10 PM

Wow that's a lot of possibilities. I pulled the code from hp tuners.

Armyavi8r · 11-14-2021, 03:13 PM

I should mention that it starts and runs just fine on warm starts and restarts. Only does this when 'cold'

I sprayed carb cleaner around intake manifold gasket and TB, etc. No change in engine noise- steady at 850.

camguynj · 11-15-2021, 06:45 AM

Quote:

Originally Posted by Armyavi8r

I should mention that it starts and runs just fine on warm starts and restarts. Only does this when 'cold'

I sprayed carb cleaner around intake manifold gasket and TB, etc. No change in engine noise- steady at 850.

Sounds like that took care of the problem. If so good but hard to figure out how it might have been a soiled TB issue as it’s brand new. Do you have a catch can?

Armyavi8r · 11-15-2021, 03:41 PM

Quote:

Originally Posted by camguynj

Sounds like that took care of the problem. If so good but hard to figure out how it might have been a soiled TB issue as it’s brand new. Do you have a catch can?

It's a Soler PTB, not soiled. I sprayed carb cleaner around the intake mani and TB to see if it indicated a leak somewhere as a few people recommended. yes, I have a catch can.

Everything is pointing to something wonky in the tune- maybe a cold start parameter that's off or something. I'm dropping it off at GPI and Ben is going to see what he can figure out.

1JEWLDSSRS · 11-15-2021, 04:04 PM

I'm thinking also that something is off on the cold start idle circuit tune, or maybe a damaged/dirty MAF...

View Poll Results: Estimate WHP after GPI mods/tune. Sitting at 390 w/ LTH, HiFlo cats, vararam cai.
<450	0	0%
450-475	11	57.89%
475-500	6	31.58%
500+	2	10.53%
Voters: 19. You may not vote on this poll

09-06-2021, 08:27 PM	#71
LCPLPunk USA-1 Drives: 2010 Camaro SS L99 Join Date: Jul 2016 Location: Near DC Posts: 1,893 View My Garage	Hell ya man! For suspension, definitely #1 in my book is the solid subframe bushings! (either solid poly or solid solid). I have roughly that same exhaust setup (except no cats), and I agree, I think it's the best! Zero drone, nasty at WOT, great at idle! As far as numbers, ya...I'd be pissed with them that low. Maybe it's a different type of dyno?? __________________ "A Camaro in the garage is safe, but that's not what Camaros are built for..." R2C CAI / Apex Scoop / VMAX Ported TB / Speed Engineering LTHs / X-pipe / GPI port/rod-mod intake manifold / Circle D 3200 278mm Converter / 3.91 gears / DynoSteve tuned / 1LE Shocks/Struts/Toe Links / ZL1 Rear Sway Bar / Z/28 Trailing arms / Prothane Radius Arm & Subframe Bushings / BMR UCA Bracket, Steering rack bushing / B&M Tranny Cooler / RX Catch Can / Jannetty Tranny Dipstick / 2012+ Heater Hose / 2013+ Rearview Mirror / Fuel rail flip / Drake shifter / Oil Cooler Delete

09-06-2021, 10:54 PM	#72
wasthatacop? Drives: 2010 2SS Join Date: Apr 2017 Location: Los Angeles Posts: 360 View My Garage	I respect you not wanting to do the work yourself. I have an L99 too. I'm jealous of your upgrades. __________________ 2010 2SS living in Los Angeles replaced engine @ 93,000 miles w/ crate engine, camshaft by Comp Cams installed by me, replaced valve train parts, 1.4" BMR lowering springs ZL1 factory rims misc: drilled and slotted rotors, fresh air brake cooling system, new speakers, installed reverse camera, muffler delete

09-07-2021, 12:45 PM	#74
Armyavi8r Drives: 2010 Camaro 2SS/RS A6 Join Date: Jul 2021 Location: Little Rock, AR Posts: 76	One installation concern I'm trying to get answers on is the placement of the transmission cooler- right in front of the Vararam scoop. Seems like that would rob it of the ram air it's designed to catch. Thoughts? __________________ 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.

11-13-2021, 09:42 PM	#75
Armyavi8r Drives: 2010 Camaro 2SS/RS A6 Join Date: Jul 2021 Location: Little Rock, AR Posts: 76	A couple times recently on start up, I've experienced difficulty turning over, and then when it does, the engine idles around 1200 (usually idles around 850) and then when I increase throttle, it'll run up to 2000-2200 and hang there, not coming down unless I turn off the ignition. Each time it returned to normal after a few starts. But the first time, I tried to drive it that way and it was almost undrivable. I'll consult with GPI next week. Most of the time it starts and runs just as it was tuned (GPI). But it has done this twice. Any ideas? __________________ 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.

11-14-2021, 01:51 AM	#76
morepowerjoe Drives: 2012 Chevrolet Camaro l99 Join Date: Aug 2020 Location: Austin, TX Posts: 2,108	It sounds like a tune problem to me. __________________ 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

11-14-2021, 01:42 PM	#77
Armyavi8r Drives: 2010 Camaro 2SS/RS A6 Join Date: Jul 2021 Location: Little Rock, AR Posts: 76	Now it starts hard, then finally fires up and goes straight to 2000 rpms every time. Throwing a CEL with P1400 code. __________________ 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.

11-14-2021, 02:05 PM	#78
morepowerjoe Drives: 2012 Chevrolet Camaro l99 Join Date: Aug 2020 Location: Austin, TX Posts: 2,108	That's odd, because the P1400 code is for the differential pressure feedback or egr circuit low input which makes no sense because we don't have an egr. So it must be the diff pressure and I have no clue on what that is. I would just wait until you speak to GPI. It's got to be in the tune. __________________ 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

11-14-2021, 03:10 PM	#80
morepowerjoe Drives: 2012 Chevrolet Camaro l99 Join Date: Aug 2020 Location: Austin, TX Posts: 2,108	Wow that's a lot of possibilities. I pulled the code from hp tuners. __________________ 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

11-14-2021, 03:13 PM	#81
Armyavi8r Drives: 2010 Camaro 2SS/RS A6 Join Date: Jul 2021 Location: Little Rock, AR Posts: 76	I should mention that it starts and runs just fine on warm starts and restarts. Only does this when 'cold' I sprayed carb cleaner around intake manifold gasket and TB, etc. No change in engine noise- steady at 850. __________________ 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.

11-15-2021, 04:04 PM	#84
1JEWLDSSRS Drives: 2011 SS-RS Join Date: May 2011 Location: FLORIDA Posts: 11,442	I'm thinking also that something is off on the cold start idle circuit tune, or maybe a damaged/dirty MAF... __________________ TSP STAGE 3 CAM,231/246 @112 LSA 614/641 LIFT, CIRCLE D 5C-4200-4500 CONVERTER,LOD INTAKE.CORSA EXHAUST. DSS 1 PC DS. PEGASUS SOLID CRADLE MOUNTS. 486RWHP/475RWTQ.LOTS MORE.