Engine down. Bent a rod. Time for a new short block - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

cc-rider · 10-03-2019, 09:39 AM

I think I finally took out my stock LS3 with the Kenne Bell huffing into it. Was rowing through the gears doing a burnout and at high rpm in 2nd gear it lurched hard and then started running rough with a little vibration. I was at least able to drive it home about 30 miles. Started it the next day and I have a distinct knock that is coming from the bottom of my engine and not the valve train. I’ll try to have my son upload the video to YouTube and post it.

So. Time for a new forged short block which is what I wanted anyway so I can turn up the boost.

Open to recommendations on a good place to get a forged short block..

graf101 · 10-03-2019, 10:00 AM

Thompson Motorsports 388 or 427 iron shortblock should do it.

ttshovel · 10-03-2019, 10:28 AM

Venom racing engines has pretty good pricing for short blocks as well.

racesloth · 01-16-2020, 12:08 PM

Any updates? What direction have you decided on?

cc-rider · 09-25-2021, 06:52 PM

Finally got to my blown Camaro after it sitting in the barn for 2 years. Took off my exhaust and I can see exactly what took out my engine. Guts of the high flow cats let loose and lodged in my x pipe and...kaboom! Still haven’t dug into the engine to confirm bent rods yet. But I’m pretty sure that’s it. Will update. Got the forged rotating assembly on order!

Chalk me up for another boosted engine owner who didn’t follow the advice that no cats will hold up under boost. Lesson learned. But looking forward to my new forged LS3 and what it can do (catless!!!!)

hunter1660 · 09-26-2021, 07:22 AM

Wow

RupertPupkin · 09-26-2021, 09:28 AM

CC… where’s you get your engine from?

cc-rider · 09-26-2021, 11:00 AM

I ordered a forged rotating assembly from cnc-motorsports out of South Dakota. Local engine shop to do the machine work. Going to build it myself. Hopefully can still use my block. We’ll see when I tear into it.

Badbubba · 09-26-2021, 11:48 AM

Yeah, my cats blew out with a little shot of nitrous. Driver's side waded up in the cat, passenger side made it to the rear diff .

Greenhornet2 · 09-27-2021, 08:09 AM

This is the only reason I don't want to run cats. Its a bit loud... well a lot loud... but I don't have to worry about this! Now you get to built it better though!

RealQuick · 10-01-2021, 08:15 AM

yup... lessons learned for everyone else. Looking forward to the build thread!

BiggFoot · 10-01-2021, 11:37 AM

Yeah the guts of my Kooks "green" cats are somewhere on Texas Hwy 3, lol.

RealQuick · 10-01-2021, 12:47 PM

Quote:

Originally Posted by BiggFoot

Yeah the guts of my Kooks "green" cats are somewhere on Texas Hwy 3, lol.

LOL!

cc-rider · 10-01-2021, 05:05 PM

Yeah. Damn cats. You’d think someone could build one to hold up to boost abuse. But it doesn’t seem so.

I think the real problem with aftermarket cats isn’t exactly the aftermarket cat…I think they need to be placed at exactly the right place down stream in the exhaust. Here I put 9 psi of boost at the engine, long tube headers, and the cats are right there. Probably way too much heat…or something. I bet if someone had the R&D money that Chevy has, they could find an aftermarket cat that would work with a blower and long tube headers. After all…the ZL1 does just fine with it. But we all slap them on together and have no idea just how the heat and flow works at that location.

Again…lesson learned for me. But going to start tearing into the engine this week. Should be a fun build.

10-03-2019, 09:39 AM	#1
cc-rider Drives: 2010 Camaro SS Join Date: Dec 2006 Location: MN Posts: 1,172	Engine down. Bent a rod. Time for a new short block I think I finally took out my stock LS3 with the Kenne Bell huffing into it. Was rowing through the gears doing a burnout and at high rpm in 2nd gear it lurched hard and then started running rough with a little vibration. I was at least able to drive it home about 30 miles. Started it the next day and I have a distinct knock that is coming from the bottom of my engine and not the valve train. I’ll try to have my son upload the video to YouTube and post it. So. Time for a new forged short block which is what I wanted anyway so I can turn up the boost. Open to recommendations on a good place to get a forged short block..

10-03-2019, 10:28 AM	#3
ttshovel Drives: 12 camaro ss, 72 chevelle, 91camaro Join Date: Dec 2013 Location: findlay,oh Posts: 2,069	Venom racing engines has pretty good pricing for short blocks as well. __________________ 12 camaro ss 427lsx, th400, f310 heads, crower shaft mounts, gpi specd solid roller, shearerfab 2k hp a/w, twin bullseye 88mm turbos, hughes pro ssx bolt together converter, holley dominator, 8.50 cert, backhalf, Ford 9", 33x17x16 tires, c16 fuel

01-16-2020, 12:08 PM	#4
racesloth Dan Drives: 2010 Camaro 2SS IOM Join Date: Nov 2013 Location: Georgia, USA not the other one Posts: 1,041	Any updates? What direction have you decided on? __________________ Dan 2010 IOM SS YSI-B, Pat G Cam, Ported CTS-V Heads, ARH LTs MBRP 3" exhaust http://www.camaro5.com/forums/showth...&highlight=ysi

09-25-2021, 06:52 PM	#5
cc-rider Drives: 2010 Camaro SS Join Date: Dec 2006 Location: MN Posts: 1,172	Finally got to my blown Camaro after it sitting in the barn for 2 years. Took off my exhaust and I can see exactly what took out my engine. Guts of the high flow cats let loose and lodged in my x pipe and...kaboom! Still haven’t dug into the engine to confirm bent rods yet. But I’m pretty sure that’s it. Will update. Got the forged rotating assembly on order! Chalk me up for another boosted engine owner who didn’t follow the advice that no cats will hold up under boost. Lesson learned. But looking forward to my new forged LS3 and what it can do (catless!!!!) Attached Images

09-26-2021, 07:22 AM	#6
hunter1660 Drives: 2011ss/rs camaro Join Date: Sep 2011 Location: florida Posts: 1,261	Wow __________________ . OBX LTH,Rotofab,Magnuson Heartbeat.AEM wideband, HP Tuners

10-03-2019, 10:00 AM	#2
graf101 Trouble_SM Drives: 17' Summit White ZL1 Join Date: Jan 2015 Location: Midlothian, TX Posts: 449	Thompson Motorsports 388 or 427 iron shortblock should do it.

09-26-2021, 09:28 AM	#7
RupertPupkin Drives: 2014 Camaro SS 1Le Join Date: Feb 2016 Location: IL Posts: 1,587	CC… where’s you get your engine from? __________________ 2014 SS 1LE Money Pit/ Forged 402 CAM 22X/24X, .619/.617, 113 LSA/ LS9 Heads FIC 1200cc/DSX Aux Pump//McLeod RXT Clutch 730whp: 630Trq

09-26-2021, 11:00 AM	#8
cc-rider Drives: 2010 Camaro SS Join Date: Dec 2006 Location: MN Posts: 1,172	I ordered a forged rotating assembly from cnc-motorsports out of South Dakota. Local engine shop to do the machine work. Going to build it myself. Hopefully can still use my block. We’ll see when I tear into it.

09-26-2021, 11:48 AM	#9
Badbubba GrINned & JUICEd Drives: 15STI, 10Expy, 10 2SS/RS M6, 47KB1 Join Date: Nov 2009 Location: Pittsburgh, PA Posts: 1,247	Yeah, my cats blew out with a little shot of nitrous. Driver's side waded up in the cat, passenger side made it to the rear diff . __________________ GPI SS3 Cam & stuff,N.O. Plate(dedicated fuel tank,progressive,fuel hose upgrade,remote opener,heater,console switches),LNC2000,CTAP,ARH 1 7/8" LTs/gutted cats/X pipe/mufflers,Jet Hot coated LTs,GPI HPT Tune,CAI, Scoop,Rx Catch Can,Gates heater hose relocation, Remote clutch & auto brake res,Metco loop,Momentum Tunnel Brace,TSW Nurb 18",555 & 05,Pfadt trailing arms & toe rods,Autometer WB,Fesler Pillar Pod,LED strips (int),Lloyds floor & trunk mats,LED DRL/front turn & license plate,DRL harness,VLEDs tail lights,Plasticoat Bowties. Ord: Oct 5, 2009 Rec: Nov 19, 2009 13.17@112.6 stock

09-27-2021, 08:09 AM	#10
Greenhornet2 Drives: 2011 Camaro 2SS LS3 Whipple Join Date: May 2019 Location: Connecticut Posts: 1,925	This is the only reason I don't want to run cats. Its a bit loud... well a lot loud... but I don't have to worry about this! Now you get to built it better though! __________________ Whipple 2.9 CAI ID1050x injectors ZL1 Pump JRE FPCM JMS Voltage booster JRE Rough Idle blower cam BTR .660 springs CHE trunnion kit 1 7/8 Speed Engineering Borla Atak JRE scoop 1.5" lowering springs BMR trailing arms and toe links Cradle inserts 704WHP 603WTQ 93 octane

10-01-2021, 08:15 AM	#11
RealQuick Drives: 2010 Camaro 2SS M6 - Intake/Exhaust Join Date: Sep 2014 Location: Bridgewater Posts: 693	yup... lessons learned for everyone else. Looking forward to the build thread!

10-01-2021, 11:37 AM	#12
BiggFoot Drives: 2010 Camaro (M6) 1000+ HP SBE Join Date: Jun 2011 Location: Houston Posts: 1,391	Yeah the guts of my Kooks "green" cats are somewhere on Texas Hwy 3, lol. __________________ F-1X, Cog Drive, ATI Super Pulley/Sprag ~ 19 psi Blower Cam Brodix BP BR 3 Heads Kooks LT Headers and full 3" exhaust Fore Triple Pump Fuel System with ID 1700X Injectors - E85 conversion DSS 9” Conversion (1400 hp axles, driveshaft, pumpkin) & Strange 3.70 gears McLeod RXT Twin HD Clutch & Upgraded Slave RPM Level VII TR6060 BMR Drag Suspension Package w/Strange shocks Carlyle 15" and M/T ET Street R radials 10.1 @ 143 mph 1/4 mile

10-01-2021, 05:05 PM	#14
cc-rider Drives: 2010 Camaro SS Join Date: Dec 2006 Location: MN Posts: 1,172	Yeah. Damn cats. You’d think someone could build one to hold up to boost abuse. But it doesn’t seem so. I think the real problem with aftermarket cats isn’t exactly the aftermarket cat…I think they need to be placed at exactly the right place down stream in the exhaust. Here I put 9 psi of boost at the engine, long tube headers, and the cats are right there. Probably way too much heat…or something. I bet if someone had the R&D money that Chevy has, they could find an aftermarket cat that would work with a blower and long tube headers. After all…the ZL1 does just fine with it. But we all slap them on together and have no idea just how the heat and flow works at that location. Again…lesson learned for me. But going to start tearing into the engine this week. Should be a fun build.