417 LS3 Camaro SS - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

LS3SSSuperSport · 05-07-2025, 04:19 PM

Due to a cracked piston I built a 417 Scat 4340 Stroker, local machine shop did the hone and cam bearings and I stroker clearanced it and built the rest. All ARP 12 point fastners.

Ordered from CNC motorsports, everything was perfect. Scat has excellent machining and everything was bang on.

Some pics for the people's!

Joe.G · 05-08-2025, 07:41 AM

Very nice, Let us know how it runs, Cam specs? Head specs ?Any other upgrades.

acutron42 · 05-08-2025, 04:06 PM

Very nice, you will love it! Who is doing you tuning.

LS3SSSuperSport · 05-08-2025, 10:16 PM

Quote:

Originally Posted by Joe.G

Very nice, Let us know how it runs, Cam specs? Head specs ?Any other upgrades.

Thanks, will do!

The mack daddy of intakes..I believe..lol Performance Design LS3 intake port matched to my heads with a 102 throttle body.

Cammotion 8620- 238/254 .630 .630

TSP PRC 260 Heads

1 7/8 Long Tubes

And 3.73 rear gears.

LS3SSSuperSport · 05-08-2025, 10:22 PM

Quote:

Originally Posted by acutron42

Very nice, you will love it! Who is doing you tuning.

Just a local guy on a mustang dyno. It's the only dyno I use so he has all the graphs from all the years of upgrades. It reads low but, as long as I show a gain I don't care.

I guess that ping I herd on start up should have been addressed, oh well I got a stroker kit out of it. Piston cracked at startup at work. Drove there fine and then at the end of day, when to start it and made a bang than ran rough, so I drove it home... piston was smashed it millions of pieces. Never did find any pistons when I took the headers off.

acammer · 05-09-2025, 09:51 AM

Fun build. That intake is so intriguing - test results have looked decent - definitely needs to have the biggest TB available on it to deliver its best.

InFiD3ViL · 05-19-2025, 10:14 PM

Quote:

Originally Posted by acammer

Fun build. That intake is so intriguing - test results have looked decent - definitely needs to have the biggest TB available on it to deliver its best.

I have been very interested in the Performance Design intake. But a couple things would have me nervous about running it. Mainly, the fuel rails and injectors under a cover. Not being able to see them and quickly inspect for leaks? IDK, I might be overthinking things, but that makes it awful hard to spot a leak and then *poof* - no more Camaro.

LS3SSSuperSport · 06-12-2025, 09:16 AM

Update took the car for a drive yesterday with BR30 breaking oil and running great!! I did have a set back, I had a leaking head gasket with the felpro gaskets shown in the pictures. So I pulled the heads and installed TFS Cometic .045 to help quench. I upped the torque on my ARP studs ro 90lbs and pressure tested it and no leaks!! I ran cometic before with no issue and should have went with them. My new clutch is also work amazing!!!!! I burned out a RXT Twin, was crap from the start. This Twin Extreme feels like stock, engages off the bottom, feels great. Trust just buy the ACT you won't be disappointed!! Part Number T2S-G05 - ACT Twin Disc Extreme Street Clutch Kit. Will be at the dyno at the end of the month, keep you posted.

joshnmn · 06-12-2025, 09:38 PM

Very cool! Thanks for the updates!!

olblue75 · 06-12-2025, 11:44 PM

What clamps did you use for your header wrap???

RGC1 · 06-18-2025, 12:36 AM

Hi just going over your posts , I just bought a 2014,Camaro SS with a Ls3 and 6 speed std trans., it has a hurt engine , he was not sure what happened was running good, went into a store come back out started it up made a crunching type noise stalled out, he left it at that point. I started pulling front water pump and timing cover off to check tensioner out it was fine but in the pan I could see a few pces, fished them out and found a pce of piston and piston ring. Is this somewhat of a common problem with these motors ? Thanks for your time.

LS3SSSuperSport · 07-09-2025, 10:12 AM

Quote:

Originally Posted by olblue75

What clamps did you use for your header wrap???

Ya...lol those are Greedy boost clamps. Wasted $120 on clamps.

LS3SSSuperSport · 07-09-2025, 10:15 AM

Quote:

Originally Posted by RGC1

Hi just going over your posts , I just bought a 2014,Camaro SS with a Ls3 and 6 speed std trans., it has a hurt engine , he was not sure what happened was running good, went into a store come back out started it up made a crunching type noise stalled out, he left it at that point. I started pulling front water pump and timing cover off to check tensioner out it was fine but in the pan I could see a few pces, fished them out and found a pce of piston and piston ring. Is this somewhat of a common problem with these motors ? Thanks for your time.

I herd they can crack like mine did, it's due to the piston design and many other factors. Mine broke because I put after market heads on and bumped the compression up to 11.94 and didn't adjust my startup timing, so it pinged time to time on start up. I made adjustment to my timing table on startup and problem solved. My stroker is running great!

LS3SSSuperSport · 07-09-2025, 10:23 AM

Update.

Hit the dyno two weeks ago, mustang dyno so you know numbers 15% off a dyno jet...but hey it's a measuring tool so here are the gains. It's a small cam at 238 254, but still made great gains. The torque you can feel, it's so much faster, it just pulls. We should have ran it up to 7000rpm, and maybe some more timing but I can always dyno it next year.

Share your thoughts.

05-07-2025, 04:19 PM	#1
LS3SSSuperSport Drives: 2010 Camaro SS Join Date: Sep 2020 Location: CANADA Posts: 26	417 LS3 Camaro SS Due to a cracked piston I built a 417 Scat 4340 Stroker, local machine shop did the hone and cam bearings and I stroker clearanced it and built the rest. All ARP 12 point fastners. Ordered from CNC motorsports, everything was perfect. Scat has excellent machining and everything was bang on. Some pics for the people's! Attached Images Last edited by LS3SSSuperSport; 05-07-2025 at 04:34 PM.

05-08-2025, 07:41 AM	#2
Joe.G Drives: 2014 2SS/RS 6SP Ashen Grey Join Date: Aug 2021 Location: NY Posts: 1,768	Very nice, Let us know how it runs, Cam specs? Head specs ?Any other upgrades. __________________ GM 3.91/TrueTrac OEM ZL1 Rims, 6 Piston Brakes & Side Skirts.ACST4 Splitter/Deflectors NPP M2W,GM Short Throw,GPI Ported Rod Mod,BO White PTB,CAI/JRE Scoop, GC Aluminum DS,Stainless Works Ceramic LTH/HiFlo Cats, Hotckis 1" Springs & Chassis Max Brace BMR Adjustable Swaybars,Trailing Arms, Adjustable Toe Rod, LCA & Z28 UCA Bushings Hendrix Solid Cradle Bushings Pedders Radius Rod Inserts Strut tower brace, Moroso Catch Can,SCT X4 Dynosteve,Remote Clutch reservoir,Hero Smoked Tail and 3rd Brake Light, Diode Dynamic SL1 Fog Lights AeroForce Dual gauge/Autometer pillar mount.

05-08-2025, 04:06 PM	#3
acutron42 Drives: 2013 Camaro 2SS AGM Join Date: Apr 2020 Location: WNY Posts: 962	Very nice, you will love it! Who is doing you tuning. __________________ 2013 2SS GPI built & tuned 415, spec'd by Andrew Cammer. GPI ported intake/tb/heads, Tooley springs, CHE trunnions, Callies rotating assembly, Diamond pistons, GPI SS3 VVT, ATI 10% ud damper, Circle D 3800, Kooks ceramic coated lt's with green cats, Mishimoto rad & oil cooler, Derale trans cooler, Holley efi rails. DSS driveshaft, trutrac with 3.91's, G-Force renegades, Hendrix solid cradle bushings Bmr: poly diff bushings, Strange adjustable coilovers, sub frame connectors, ZL1 npps, controlled with a vac pump & mac boost control solenoid.

05-09-2025, 09:51 AM	#6
acammer GPI Sales Consultant Drives: 2011 Camaro 2SS SGM Join Date: Jul 2016 Location: Weedsport, NY Posts: 3,019 View My Garage	Fun build. That intake is so intriguing - test results have looked decent - definitely needs to have the biggest TB available on it to deliver its best. __________________ 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!*

06-12-2025, 11:44 PM	#10
olblue75 Drives: 2010 2SS/RS Join Date: Dec 2009 Location: Clarksville Tennesse. Posts: 6,156	What clamps did you use for your header wrap??? __________________ Orange Krush II 1LE Front sway bar, Splitter, shocks and struts, Z28 dual mode mufflers, Intake, UCA Bushings, and Toresen 3.91 Diff. 1 piece DSS Drive Shaft, ZL1/C7 Calipers, and 32mm JPSS Rear Bar. ASC race spec splitter and wicker. 6th Gen M017 Wheels. Stainless Works 1 7/8 LTs. DSE and PAFDT Suspension components.

06-12-2025, 09:16 AM	#8
LS3SSSuperSport Drives: 2010 Camaro SS Join Date: Sep 2020 Location: CANADA Posts: 26	Update took the car for a drive yesterday with BR30 breaking oil and running great!! I did have a set back, I had a leaking head gasket with the felpro gaskets shown in the pictures. So I pulled the heads and installed TFS Cometic .045 to help quench. I upped the torque on my ARP studs ro 90lbs and pressure tested it and no leaks!! I ran cometic before with no issue and should have went with them. My new clutch is also work amazing!!!!! I burned out a RXT Twin, was crap from the start. This Twin Extreme feels like stock, engages off the bottom, feels great. Trust just buy the ACT you won't be disappointed!! Part Number T2S-G05 - ACT Twin Disc Extreme Street Clutch Kit. Will be at the dyno at the end of the month, keep you posted.

06-12-2025, 09:38 PM	#9
joshnmn 2&THEHIT Drives: 5th Gen Camaro; 5th Gen Ram 3500 Join Date: Mar 2018 Location: Garner, NC Posts: 1,103 View My Garage	Very cool! Thanks for the updates!!

06-18-2025, 12:36 AM	#11
RGC1 Drives: 2014 SS Camaro Join Date: Jun 2025 Location: Canada Posts: 9	Hi just going over your posts , I just bought a 2014,Camaro SS with a Ls3 and 6 speed std trans., it has a hurt engine , he was not sure what happened was running good, went into a store come back out started it up made a crunching type noise stalled out, he left it at that point. I started pulling front water pump and timing cover off to check tensioner out it was fine but in the pan I could see a few pces, fished them out and found a pce of piston and piston ring. Is this somewhat of a common problem with these motors ? Thanks for your time.

07-09-2025, 10:23 AM	#14
LS3SSSuperSport Drives: 2010 Camaro SS Join Date: Sep 2020 Location: CANADA Posts: 26	Update. Hit the dyno two weeks ago, mustang dyno so you know numbers 15% off a dyno jet...but hey it's a measuring tool so here are the gains. It's a small cam at 238 254, but still made great gains. The torque you can feel, it's so much faster, it just pulls. We should have ran it up to 7000rpm, and maybe some more timing but I can always dyno it next year. Share your thoughts. Attached Images