Ls2 vs Ls3 heads. - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

2010_camaro · 09-21-2016, 08:26 AM

So what kinda power loss am I looking at with switching from my LS3 heads to a set of LS2 heads?

Only asking because my one ls3 heads is junk and I got a set of LS2 heads for free.

Will my valves from my ls3 head fit in the ls2?
Will my springs are rockers from my ls3 work with the ls2 heads?

2010_camaro · 09-21-2016, 08:27 AM

My car is being twin turbod with a build 6.0

Unreal · 09-21-2016, 10:16 AM

Rockers won't fit. Intake manifold won't fit. Odds of making 1000 without heads lifting are slim.

If you can't afford some new LSA heads you can't afford 1000hp imo. I would lower your goals if you even have to ask stuff like this.

2010reddevil · 09-21-2016, 11:20 AM

Yeah totally different top end architecture there. Ported LSA heads (since they're already out in the open) and done.

2010_camaro · 09-21-2016, 01:15 PM

Quote:

Originally Posted by Unreal

Rockers won't fit. Intake manifold won't fit. Odds of making 1000 without heads lifting are slim.

If you can't afford some new LSA heads you can't afford 1000hp imo. I would lower your goals if you even have to ask stuff like this.

Heads lifting? Funny because the 5.3 is an extremely common build around here and several people are making 900-1000whp with no head's lifting. ARP head studs.

Only asked about the heads because they had been given to me.

If they don't work I'll send them off have them cleaned milled and sell them.

Unreal · 09-21-2016, 01:38 PM

Yes, ls1/2/6 heads are more prone to lifting. Deck design is not as robust.

frankwjr · 09-21-2016, 03:07 PM

Were you the one who posted the "repaired" LS3 head pics? Dude, ebay has single LS3 heads $400 bucks..heck I'm new to the forum but chances are another member may have one layin around..hope you get back on the road soon...peace out..

2010_camaro · 09-22-2016, 07:36 AM

Quote:

Originally Posted by frankwjr

Were you the one who posted the "repaired" LS3 head pics? Dude, ebay has single LS3 heads $400 bucks..heck I'm new to the forum but chances are another member may have one layin around..hope you get back on the road soon...peace out..

Ya. I sent it off and that's how I got it back.

Was going to order the ported gm performance ls3 heads but had a set of 317s given to me. Figured if I could save $1200 why not. I knew the efficiency was lower then the ls3 heads just was sure how big of a difference it would make in boost.

Aaron at SDPC · 09-22-2016, 10:35 AM

I would recommend selling the heads you got for free and put that money towards another head to replace your damaged one. It will save you time, and money in the long run.

06bomgto · 09-22-2016, 10:00 PM

317s are not ls2 heads. Ls2 has 243s. I might be mistake but I believe the 317s are good for boost

KW Baraka · 09-25-2016, 10:23 PM

Quote:

Originally Posted by 2010_camaro

.....had a set of 317s given to me. Figured if I could save $1200 why not.....

Gonna need a new intake, gonna need new rockers, and to make the LS3 valves work.....pretty sure the heads will need a complete valve job.

Ii I were in your position.....I'd buy a single LS3 head off Ebay.....and sell those 317 heads. But that's just me.

KW

PostNup · 09-25-2016, 11:27 PM

From everything I have read - UNREAL is treasure trove of knowledge and as far as I can tell, has NEVER been wrong.

You would be wise to listen to him here and even PM him for more specific knowledge. From what I can tell, he is always MORE than willing to help.

He is running at 3-4 times stock rwhp reliably... Just saying.

09-21-2016, 08:26 AM	#1
2010_camaro Drives: 2014 Camaro SS Join Date: May 2011 Location: Florence, KY Posts: 2,238 View My Garage	Ls2 vs Ls3 heads. So what kinda power loss am I looking at with switching from my LS3 heads to a set of LS2 heads? Only asking because my one ls3 heads is junk and I got a set of LS2 heads for free. Will my valves from my ls3 head fit in the ls2? Will my springs are rockers from my ls3 work with the ls2 heads? __________________ MODS 6.0 forged iron block, TH400, B&M shifter, DSS axles & driveshaft, Viking / BMR suspension, Full custom fuel system with cell, Twin 76mm teriyaki tornados on 24lbs. https://www.instagram.com/whoopa_ss/

09-21-2016, 08:27 AM	#2
2010_camaro Drives: 2014 Camaro SS Join Date: May 2011 Location: Florence, KY Posts: 2,238 View My Garage	My car is being twin turbod with a build 6.0 __________________ MODS 6.0 forged iron block, TH400, B&M shifter, DSS axles & driveshaft, Viking / BMR suspension, Full custom fuel system with cell, Twin 76mm teriyaki tornados on 24lbs. https://www.instagram.com/whoopa_ss/

09-21-2016, 10:16 AM	#3
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,712	Rockers won't fit. Intake manifold won't fit. Odds of making 1000 without heads lifting are slim. If you can't afford some new LSA heads you can't afford 1000hp imo. I would lower your goals if you even have to ask stuff like this. __________________ Nick Corvette Z06 -1200ish rwhp

09-21-2016, 11:20 AM	#4
2010reddevil Drives: 2010 Camaro 2SS Victory Red 6M Join Date: Apr 2015 Location: Gulf Coast, TX Posts: 1,424	Yeah totally different top end architecture there. Ported LSA heads (since they're already out in the open) and done. __________________ 2011 2SS 6A Red Jewel Metallic, Vararam Tune CAI, Magnaflow 3" Competition c/b, Speed Engineering 1-7/8 LT's, Circle D 5C, M/T 275/40R20 S/S, HPTuners tune by Ryan@GPI 12.3 @ 112 ACM as of 12/22/19 Gone on 12/28/19 R I P 2010 2SS 6M Victory Red/Black (old ride) CAI intake, Speed Engineering 1 7/8" LT's, X4 base tune, Flowmaster Outlaw axle-back. 12.6 @ 115 SAR as of 9/19/15 Gone but never forgotten.

09-21-2016, 01:38 PM	#6
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,712	Yes, ls1/2/6 heads are more prone to lifting. Deck design is not as robust. __________________ Nick Corvette Z06 -1200ish rwhp

09-21-2016, 03:07 PM	#7
frankwjr Drives: 2010 SS 2SS M6 Join Date: Aug 2016 Location: Smithsburg, Md. Posts: 2,445	Were you the one who posted the "repaired" LS3 head pics? Dude, ebay has single LS3 heads $400 bucks..heck I'm new to the forum but chances are another member may have one layin around..hope you get back on the road soon...peace out.. __________________ 2010 SS 2SS M6 - Tune by RDP dynoSteve!(Woot) - Daily Driver - *150K!* - All work by me...

09-22-2016, 10:35 AM	#9
Aaron at SDPC Drives: Camaro Z28 Join Date: Aug 2016 Location: Lubbock Texas Posts: 36	I would recommend selling the heads you got for free and put that money towards another head to replace your damaged one. It will save you time, and money in the long run.

09-22-2016, 10:00 PM	#10
06bomgto Drives: 06 BOM GTO Join Date: May 2016 Location: San Antonio, TX Posts: 50	317s are not ls2 heads. Ls2 has 243s. I might be mistake but I believe the 317s are good for boost

09-25-2016, 11:27 PM	#12
PostNup CAR-DASHIAN Drives: 2015 Ashen Gray Metallic 2SS/RS L99 Join Date: Nov 2015 Location: Gilbert, AZ Posts: 540	From everything I have read - UNREAL is treasure trove of knowledge and as far as I can tell, has NEVER been wrong. You would be wise to listen to him here and even PM him for more specific knowledge. From what I can tell, he is always MORE than willing to help. He is running at 3-4 times stock rwhp reliably... Just saying. __________________ PERFORMANCE: ColdAirInductions CAI, ADM Race Scoop, Cordes Performance Racing Ported TB/IM/Custom VVT Cam, WFO Milled Heads, Stainless Power 1 7/8" LT/3" HFCs, JBA 3" Comp. Cat-Back, Taylor 10.4mm Plug Wires, Tim King Performance Stage 3 6L80, Circle D Billet 3600 Stall, Nic D ECM/TCM Tune, - 458rwhp/413rwtq (prior to PIM), Forgestar F14 (F)18" / (R)17" Rims. SUSPENSION: Z/28 Rear UCA Bushings, Carlyle Racing LCA/TA, BMR Adj. Toe Rods/Xtreme Anti-Roll Bar, Justice Pete Castor Locks/Radius Rod Inserts, Pegasus Billet Rear Cradle Bushings, Mickey Thompson Street SS II 305/45/17 tires.