GPI Build Journey - Page 5 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

morepowerjoe · 08-25-2021, 10:53 AM

I'm guessing 475 rwhp.

Car Nation Videos · 08-25-2021, 10:57 AM

460 to the wheels

1JEWLDSSRS · 08-25-2021, 04:06 PM

I'm gonna say 465rwhp...

Ashen 6.2 · 08-25-2021, 05:02 PM

488rwhp is my guess.

LCPLPunk · 08-26-2021, 06:06 AM

I'm gonna say 480...

11-Camaro · 08-26-2021, 08:11 AM

I am guessing 450 +/-. I did the voting matrix but messed that up. I originally thought you were looking for a vote on what HP you were going to build based on the votes.

SL33P3R · 08-27-2021, 07:02 AM

Curious to see the end result. I was just putting together a budget for pretty much the same exact build.

Armyavi8r · 08-27-2021, 10:15 PM

Well she's all done and ready for the dyno. GPI is in the process of moving their operation down the road to a newer, better location. They were moving the dyno equipment yesterday and today so my run will have to wait until Monday or Tuesday. I return to LR on Tuesday so all good- might see the dyno pulls in person if I get there in time.

1JEWLDSSRS · 08-30-2021, 06:14 PM

Good luck bro!!! Should be good!!

Armyavi8r · 09-06-2021, 02:55 PM

Build Update.

Ok, all the work is done, tuned and running great!!! Dyno numbers were definitely underwhelming (435 / 404) which was very surprising; really thought it would have hit 450 at a minimum. However, I didn't do the work for dyno numbers, I did it all for the drive and it drives AMAZING!

A word about GPI. These guys are absolutely awesome! Answered all my questions, worked with me extensively on the build. Were responsive, flexible and helpful and we didn't blow out the budget. They are in a new facility a few miles from the original location and let me just say, it is an amazing facility! And it has air conditioning (the old place did not).

So my observations now that I've driven it a few days-

Drivability: If you are a first-time cam driver like me, you know you'll see a change when you go from stock cam to a stage 3. In short, she isn't a fan of anything under 20mph but really doesn't do too badly. With the 36-3800 stall, she really pulls at the reins and want to run, but GPI tuned it to be manageable in traffic. So it's noticeable, but really not problematic at low speeds. At anything above 20, she just plows thru shift-points smoothly. On decel from 50 down to 20 mph, you can definitely feel the lope as RPMs jump and come down. Again, not a problem, but noticeable.

0-60: Holy crap! That's just fun as hell. It's a completely different car! You really get pulled back in the seat as you hang on to this rocket.

60 and 100 pulls: Holy crap! Gets on it NOW and goes from 60 to 80 to 100 in the time it takes to look from spedo to tach and back. I fear I'm going to get a high-speed driving award from LE really soon, LoL.

MPG: Ok. Big difference here in town. I'm seeing basically 9-10 mpg so if fuel economy is very important to you, don't get a stage 3 cam, LoL. That said, on the highway at 55mph she's showing about 21mpg and at 80mph she shows about 20mpg so that's not too far off of stock.

Sound: First I'll say that the cam chop definitely grows on you and now I just think it sounds awesome! Ok, I made a decision on the previous exhaust build to be a little less aggressive on the sound. I have LTH w/ high flow cats, X-pipe (res delete) and stock mufflers. My observation is that it has a nice deep, powerful growl on starting, definitely announces it's presence to the guy in the other lane at a stop light. However, it's not raspy or ear-splitting, it just sounds perfect. It's loud when I want it to be (passing a Mopar or 'stang) but when cruising along not WOT, you really don't notice it- no mind-numbing drone. But you do hear any appreciable application of throttle. I'll post a couple videos.

Back to the Dyno. Yeah I hoped for at least 450whp, but that said she drives exactly how I hoped when I decided to mod her. She was the first car on the dyno after GPI moved to the new location so not sure if there may have been an equipment calibration issue. I'll put her back on in a few weeks as we tweak a few things (surges occasionally after a warm start at idle). Lesson here is that unless your goal is making numbers on a dyno sheet, don't get too caught up in the numbers. Enjoy the drive!

Next step will be some undercarriage and chassy upgrades. The goal will be better stability on acceleration and handling in the curves. Very interested to hear recommendations. She not going to spend any time at the track (ok maybe a few runs). Just out and about mainly.

I hope this is helpful, especially for those like me who are doing their first cam.

Cheers!

morepowerjoe · 09-06-2021, 03:11 PM

Well that's great to hear that you are happy with it. That's the most important thing. I know how much of a difference the cam makes "it's insane right". I'm glad everything worked out for you. Now you need to post a clip in the "cam and exhaust sound clips" 😉

Ashen 6.2 · 09-06-2021, 05:57 PM

Awesome & congrats! Your spot on about the numbers, how it feels is the most important part (IMO) and how much it makes you smile of course!!lol

Armyavi8r · 09-06-2021, 06:20 PM

Quote:

Originally Posted by Ashen 6.2

Awesome & congrats! Your spot on about the numbers, how it feels is the most important part (IMO) and how much it makes you smile of course!!lol

Of course, if the numbers had been better I'd probably be singing a different tune, LoL

1JEWLDSSRS · 09-06-2021, 07:42 PM

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!!!

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

08-25-2021, 10:53 AM	#57
morepowerjoe Drives: 2012 Chevrolet Camaro l99 Join Date: Aug 2020 Location: Austin, TX Posts: 2,105	I'm guessing 475 rwhp. __________________ 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 Last edited by morepowerjoe; 08-25-2021 at 05:16 PM.

08-25-2021, 04:06 PM	#59
1JEWLDSSRS Drives: 2011 SS-RS Join Date: May 2011 Location: FLORIDA Posts: 11,442	I'm gonna say 465rwhp... __________________ 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.

08-25-2021, 05:02 PM	#60
Ashen 6.2 Drives: 2014 Camaro Z/SS Join Date: May 2014 Location: NW Arkansas Posts: 1,998 View My Garage	488rwhp is my guess. __________________ 2014 Camaro SS L99, Ashen Grey w/Black Leather - Build thread - http://www.camaro5.com/forums/showthread.php?t=491561 Mods - GPI 416 w/Custom Grind Cam, Ported Heads & Tuned by Ben, Holley Dominator ECU, Mag Heartbeat, ZL1 Fuel Pump & DSX Aux Pump, NW 103 TB, FIC 1650's, Alky Meth, Circle D 3600 Triple Disc, Kooks Headers, Viking Coil Overs & all the BMR Goodies in the rear, Zl1 3.23 Diff, DSS Axles, Gulfcoast Driveshaft, Hendrix Offset Diff Bushings, AFE Solid Subframe Bushings, 875HP/843TQ 5FDP

08-26-2021, 06:06 AM	#61
LCPLPunk USA-1 Drives: 2010 Camaro SS L99 Join Date: Jul 2016 Location: Near DC Posts: 1,893 View My Garage	I'm gonna say 480... __________________ "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

08-25-2021, 10:57 AM	#58
Car Nation Videos YouTube-Car Nation Videos Drives: 2010 Chevrolet Camaro Join Date: Nov 2019 Location: Florida Posts: 246	460 to the wheels

08-26-2021, 08:11 AM	#62
11-Camaro Drives: 11 Camaro SS, Ninja 1000, Santa Fe Join Date: Sep 2020 Location: Dallas Posts: 49	I am guessing 450 +/-. I did the voting matrix but messed that up. I originally thought you were looking for a vote on what HP you were going to build based on the votes. __________________ 11 Camaro TT SS. 14 1LE motor, full coilover, CNC ported LSA heads, stainless valves, dual springs, Comp 224 cam, Melling oil pump, AGP Garrett GTX30r's, 1400cc injectors, full 3" Magnaflow, dual Walbro 450lph fuel pump, ZL1 6L90 trans, trans cooler, Circle-D 3600, 3.91:1 Eaton Truetrac, line lock, Lingenfelter 2 step. Current boost - e85 814 RWHP.

08-27-2021, 07:02 AM	#63
SL33P3R Drives: 2013 Camaro SS Vert Join Date: Apr 2019 Location: Otsego, MI Posts: 70	Curious to see the end result. I was just putting together a budget for pretty much the same exact build.

08-27-2021, 10:15 PM	#64
Armyavi8r Drives: 2010 Camaro 2SS/RS A6 Join Date: Jul 2021 Location: Little Rock, AR Posts: 76	Well she's all done and ready for the dyno. GPI is in the process of moving their operation down the road to a newer, better location. They were moving the dyno equipment yesterday and today so my run will have to wait until Monday or Tuesday. I return to LR on Tuesday so all good- might see the dyno pulls in person if I get there in time. __________________ 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.

08-30-2021, 06:14 PM	#65
1JEWLDSSRS Drives: 2011 SS-RS Join Date: May 2011 Location: FLORIDA Posts: 11,442	Good luck bro!!! Should be good!! __________________ 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.

09-06-2021, 02:55 PM	#66
Armyavi8r Drives: 2010 Camaro 2SS/RS A6 Join Date: Jul 2021 Location: Little Rock, AR Posts: 76	Build Update. Ok, all the work is done, tuned and running great!!! Dyno numbers were definitely underwhelming (435 / 404) which was very surprising; really thought it would have hit 450 at a minimum. However, I didn't do the work for dyno numbers, I did it all for the drive and it drives AMAZING! A word about GPI. These guys are absolutely awesome! Answered all my questions, worked with me extensively on the build. Were responsive, flexible and helpful and we didn't blow out the budget. They are in a new facility a few miles from the original location and let me just say, it is an amazing facility! And it has air conditioning (the old place did not). So my observations now that I've driven it a few days- Drivability: If you are a first-time cam driver like me, you know you'll see a change when you go from stock cam to a stage 3. In short, she isn't a fan of anything under 20mph but really doesn't do too badly. With the 36-3800 stall, she really pulls at the reins and want to run, but GPI tuned it to be manageable in traffic. So it's noticeable, but really not problematic at low speeds. At anything above 20, she just plows thru shift-points smoothly. On decel from 50 down to 20 mph, you can definitely feel the lope as RPMs jump and come down. Again, not a problem, but noticeable. 0-60: Holy crap! That's just fun as hell. It's a completely different car! You really get pulled back in the seat as you hang on to this rocket. 60 and 100 pulls: Holy crap! Gets on it NOW and goes from 60 to 80 to 100 in the time it takes to look from spedo to tach and back. I fear I'm going to get a high-speed driving award from LE really soon, LoL. MPG: Ok. Big difference here in town. I'm seeing basically 9-10 mpg so if fuel economy is very important to you, don't get a stage 3 cam, LoL. That said, on the highway at 55mph she's showing about 21mpg and at 80mph she shows about 20mpg so that's not too far off of stock. Sound: First I'll say that the cam chop definitely grows on you and now I just think it sounds awesome! Ok, I made a decision on the previous exhaust build to be a little less aggressive on the sound. I have LTH w/ high flow cats, X-pipe (res delete) and stock mufflers. My observation is that it has a nice deep, powerful growl on starting, definitely announces it's presence to the guy in the other lane at a stop light. However, it's not raspy or ear-splitting, it just sounds perfect. It's loud when I want it to be (passing a Mopar or 'stang) but when cruising along not WOT, you really don't notice it- no mind-numbing drone. But you do hear any appreciable application of throttle. I'll post a couple videos. Back to the Dyno. Yeah I hoped for at least 450whp, but that said she drives exactly how I hoped when I decided to mod her. She was the first car on the dyno after GPI moved to the new location so not sure if there may have been an equipment calibration issue. I'll put her back on in a few weeks as we tweak a few things (surges occasionally after a warm start at idle). Lesson here is that unless your goal is making numbers on a dyno sheet, don't get too caught up in the numbers. Enjoy the drive! Next step will be some undercarriage and chassy upgrades. The goal will be better stability on acceleration and handling in the curves. Very interested to hear recommendations. She not going to spend any time at the track (ok maybe a few runs). Just out and about mainly. I hope this is helpful, especially for those like me who are doing their first cam. Cheers! __________________ 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. Last edited by Armyavi8r; 09-06-2021 at 07:51 PM.

09-06-2021, 03:11 PM	#67
morepowerjoe Drives: 2012 Chevrolet Camaro l99 Join Date: Aug 2020 Location: Austin, TX Posts: 2,105	Well that's great to hear that you are happy with it. That's the most important thing. I know how much of a difference the cam makes "it's insane right". I'm glad everything worked out for you. Now you need to post a clip in the "cam and exhaust sound clips" 😉 __________________ 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

09-06-2021, 05:57 PM	#68
Ashen 6.2 Drives: 2014 Camaro Z/SS Join Date: May 2014 Location: NW Arkansas Posts: 1,998 View My Garage	Awesome & congrats! Your spot on about the numbers, how it feels is the most important part (IMO) and how much it makes you smile of course!!lol __________________ 2014 Camaro SS L99, Ashen Grey w/Black Leather - Build thread - http://www.camaro5.com/forums/showthread.php?t=491561 Mods - GPI 416 w/Custom Grind Cam, Ported Heads & Tuned by Ben, Holley Dominator ECU, Mag Heartbeat, ZL1 Fuel Pump & DSX Aux Pump, NW 103 TB, FIC 1650's, Alky Meth, Circle D 3600 Triple Disc, Kooks Headers, Viking Coil Overs & all the BMR Goodies in the rear, Zl1 3.23 Diff, DSS Axles, Gulfcoast Driveshaft, Hendrix Offset Diff Bushings, AFE Solid Subframe Bushings, 875HP/843TQ 5FDP

09-06-2021, 07:42 PM	#70
1JEWLDSSRS Drives: 2011 SS-RS Join Date: May 2011 Location: FLORIDA Posts: 11,442	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!!! __________________ 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.