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Old 12-31-2008, 10:30 AM   #1
PBANDPKGTO
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L92 Heads/Info and Owners In Here

Always a lot of talk so I have comprised a list of all the owners with L92 heads and a stock bottom end. I have also done my best to obtain cam specs and track times.

See the redone list below in post #7.

If I missed anyone please let me know as well as if I stated something incorrectly.

Also if any of you can fill in the places where there are ??? that would be great.
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Last edited by PBANDPKGTO; 12-31-2008 at 12:28 PM.
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Old 12-31-2008, 10:42 AM   #2
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Damn that didn't show up on the screen like I thought it would.
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Old 12-31-2008, 11:32 AM   #3
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Can someone put this in some sort of sheet that is easy to read?
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Old 12-31-2008, 11:34 AM   #4
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Looks like a list of a lot of slow cars. Including the king of them all.
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Old 12-31-2008, 11:37 AM   #5
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Quote:
Originally Posted by Oh4GTO...View Post
Looks like a list of a lot of slow cars. Including the king of them all.

LMAO get outa my thread
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Old 12-31-2008, 11:47 AM   #6
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Good idea, thanks for going to all that effort. Maybe make the seperation bold for ease of reading, like this...

transformer goat//432/391//A4//230/240 114//12.9@110

ps New numbers and times in the spring
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Valve shrouding on a stock motor is fine though, because ultimately you're just going to blow it up anyways, and then bore out the motor. Voila, valve unshrouded.

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Old 12-31-2008, 11:56 AM   #7
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Official L92/L76 and LS3 Heads/Intake FAQ and Information


- L92/L76 and LS3 FAQ.

Q. What are the differences between L92/LS3 and LS2 style heads?
A. The L92/LS3 heads have larger relocated valves, larger rectangular intake ports (as opposed to the LS2's cathedral port), as well as increased intake and exhaust flow.













Q. What are the differences between L92 and LS3 heads?
A. LS3 heads ship with lighter valves and better valvesprings than standard L92 heads. Everything else is identical.

Q. What headgaskets can I use with L92/LS3 heads?
A. You CAN NOT use LS2 headgakets. You need a 4.060 bore headgasket which is OEM equipment on all vehicles with L92 heads or LS3 heads (see below). Many aftermarket manufacturers offer 4.060 head gaskets in different thicknesses to raise or lower compression.

Q. What are the differences between L76 and LS3 intake?
A. L92 and LS3 intake manifolds share the same castings and can be used interchangeably. Although the LS3 also has an external "beauty" cover, the most noteable difference in the manifolds themselves is the MAP sensor.

The L76 manifold uses an LS2 MAP sensor with a clip style mount.
The LS3 manifold uses a slightly larger MAP sensor (p/n: 88988583) that is bolted down.

Q. Where can I find L92/L76 or LS3 heads and intake?
A. The L92 Heads are OEM equipment on

- 2007+ Cadillac Escalade
- 2008+ Chevrolet Tahoe
- 2007+ GMC Yukon Denali/Denali XL
- 2007+ GMC Sierra Denali
- 2008+ Hummer H2
- 2009+ Chevrolet Silverado 1500
- 2008-2009 Pontiac G8 GT

The L76 Intake is OEM equipment on

- 2008-2009 Pontiac G8 GT

The LS3 Heads & Intake are OEM equipment on

- 2008-present Chevrolet Corvette
- 2009 Pontiac G8 GXP
- 2010 Chevrolet Camaro

Q. Which engines will the L92/L76 or LS3 Heads/Intake fit?
A. Any GM GEN-IV engine with a 4.000 bore or larger.

Q. With the L92/L76 or LS3 what are my options for...

- Rockers
- Springs
- Fuel Rails
- Injectors

Q. What do I need for a L92/L76 or LS3 swap on my car?



- L92/L76 and LS3 Tips and Information.

- Compression Ratio
- Flycutting




- Dyno Numbers of L92/L76 and LS3 Heads/Intake GTO's with stock displacement.

These cars are all 364 CID, and dyno numbers should be SAE to keep with the standard.

I have ordered them decending from the highest horsepower. If your information below needs updated, or you would like to be added to the list - please PM me or post up.

Thanks to PBANDPKGTO for gathering all the data.

Code:
Screen Name	RWHP/RWTQ	Transmission	Camshaft		Portwork	ET @ MPH
				
PhillyGoat	486/435		M6		232/238 .595/.605 114	Heads|Intake
Johnehale2003	485/439		M6		231/234 .643/.598 111	Intake		11.88@116mph
SAjenkins24	479/430		M6		232/236 .600/.600 113	
kanibal		477/462		A4		224/230 .581/.581 114 	Heads
Tims05		476/416		A4		Cartek Custom		Heads|Intake	11.55@117mph
BeachGoat       475/425         M6              224/230 .581/.591 114   Heads|Intake    12.49@113mph
gnfan           469/420         A4              227/235 .614/.620 114   Intake
goatryder08	468/439		M6		216/229 .561/.562 113	Intake	
ArthurJGuy	461/421		M6		234/245 .64x/.60x 111	Heads|Intake	
DaGoat6Litre	459/436		M6		222/224 .566/.568 112	
skyfz_450	458/430		M6		228/240 .610/.612 115	
G_Loc		458/422		M6		225/230 .617/.613 112	Intake
Badimpala	458/421		M6		227/239 .614/.624	Heads|Intake
KC2GIW		456/427		M6		228/240 .610/.612 115	Heads		12.90@117mph
Stevo		452/419		M6		224/240 .588/.591			12.40@110mph
TOCgoat		452/412		M6		228/244 .615/.615 115	Heads		
PBANDPKGTO	451/403		A4		232/236 .600/.600 113	Intake		11.22@120mph
CDRUM1		450/400		M6		228/230 .588/.591	
Badimpala	446/404		M6		228/240 .611/.610	Heads|Intake
Bambam		438/403		M6		232/236 .600/.600 113	
ShoddyHog	438/405		M6		228/232 .612/.600 111	Heads|Intake
TKO52		426/391		M6		242/242 .610/.610	
Scottward	415/407		M6		Stock LS2		Intake
Attached Images
File Type: jpg 634_17.jpg (69.8 KB, 23207 views)
File Type: jpg 634_18.jpg (55.3 KB, 22193 views)
File Type: jpg 634_20.jpg (43.5 KB, 22046 views)
File Type: jpg 634_28.jpg (40.1 KB, 22222 views)
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Last edited by ArthurJGuy; 01-17-2011 at 12:29 PM.
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Old 12-31-2008, 12:19 PM   #8
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AJG how did you do that

I also have a break down of whose heads are ported and whose aren't if you could add that to it.

Great job.

Took me about 2 hours to gather the info-took you 2 minutes to fix everything LOL.
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Old 12-31-2008, 12:21 PM   #9
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Quote:
Originally Posted by PBANDPKGTO...View Post
AJG how did you do that

I also have a break down of whose heads are ported and whose aren't if you could add that to it.

Great job.

Took me about 2 hours to gather the info-took you 2 minutes to fix everything LOL.

If you want to PM me the porting info, I'll add it to the list.

It was a mixture of Excel, and the CODE tag on the forum here.

Code respects tabs, this WYSIWYG editor does not.
Attached Images
File Type: jpg 634_19.jpg (68.8 KB, 21787 views)
File Type: jpg 634_26.jpg (62.8 KB, 21954 views)

Last edited by ArthurJGuy; 01-26-2009 at 11:18 AM.
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Old 12-31-2008, 12:22 PM   #10
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Looking at this list has just made me want to port a few things and get a little more agressive on the tune and make a run for the top of the list (dyno wise). haha.
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Old 12-31-2008, 12:24 PM   #11
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Beach Goats time

12.49, 113mph

Also for those listed that have those "secret squirrel" cam specs I really wish you would "disclose" them. This thread is more of an informative thread for those thinking about doing the swap.

Along those lines, specs of a cam are one thing, but there is a lot more that just lift, duration, and lsa specs that make a cam work-so don't feel like you are divulging "priveledged" info.
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Old 12-31-2008, 12:32 PM   #12
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I'll post up the info that is known on my cam, but not the exacts.
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Old 12-31-2008, 12:40 PM   #13
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Great list!

Wish there was more of that kinda thing on the forum.
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Old 01-01-2009, 02:50 PM   #14
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Quote:
Originally Posted by BlueFlyingGoat...View Post
Great list!

Wish there was more of that kinda thing on the forum.

Thanks-maybe a mod will step in and make it a sticky.
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Old 01-01-2009, 03:11 PM   #15
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I was @ 429/391 on my first try at tuning and full torque management. M6 little Katech stage II 276/576 116lsa. But went back to LS2 heads for Maggie. Heads milled for stock compression and little porting. That reminds me I still need to sell that kit.
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Old 01-01-2009, 04:32 PM   #16
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not using these heads but it was a good read anyway.good work guys
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Old 01-01-2009, 05:18 PM   #17
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You need a couple more colums for Self Installed and Self Tuned so we know who the REAL studs are.

And I think my numbers should be 438/405.

Gerry
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Old 01-01-2009, 06:43 PM   #18
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Quote:
Originally Posted by ShoddyHog...View Post
You need a couple more colums for Self Installed and Self Tuned so we know who the REAL studs are.

And I think my numbers should be 438/405.

Gerry

LMAO

Sorry-I am sure Arthur will edit it when he sees it.
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Old 01-01-2009, 07:20 PM   #19
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Mine has a ported intake (LS2 portworks)
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Old 01-01-2009, 11:06 PM   #20
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Quote:
Originally Posted by ShoddyHog...View Post
You need a couple more colums for Self Installed and Self Tuned so we know who the REAL studs are.

And I think my numbers should be 438/405.

Gerry

Quote:
Originally Posted by PBANDPKGTO...View Post
LMAO

Sorry-I am sure Arthur will edit it when he sees it.

Quote:
Originally Posted by gnfan...View Post
Mine has a ported intake (LS2 portworks)

All fixed
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Old 01-04-2009, 04:58 PM   #21
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Ttt
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Old 01-04-2009, 05:05 PM   #22
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This should be stickied, along with all of the info on the L76/L92 and LS3 setups. Differences, whats needed to use them on an LS2, etc etc.
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Old 01-04-2009, 05:16 PM   #23
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Just found your thread thank you for getting my info on there. As for post 17 I did all the install with the help of the other GTO's in Tulsa, we will get together to install anything. Had the intake ported and polished @ LS2 PortWorks. Guess I will take it back to the turner to try to squeez out another 2 rwhp to get to the top. Track time are in my sig.
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Old 01-04-2009, 05:27 PM   #24
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John how about your heads, are they ported?
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Old 01-04-2009, 09:02 PM   #25
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You can add me up there last dyno @ 468/439
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Old 01-04-2009, 09:09 PM   #26
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Quote:
Originally Posted by goatryder08...View Post
You can add me up there last dyno @ 468/439

I'll add you to the list, I see the ported intake in your sig - were the heads ported?

Also any quarter mile times?

Last edited by ArthurJGuy; 01-04-2009 at 09:11 PM.
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Old 01-05-2009, 09:03 AM   #27
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Is it stock cubic inches or completely stock bottom end?
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Old 01-05-2009, 09:05 AM   #28
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Quote:
Originally Posted by Beach Goat...View Post
Is it stock cubic inches or completely stock bottom end?

Well it is suppose to be stock bottom end.

We are giving Arthur a pass because he was nice enough to redo the list in an easy to read version LOL.
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Old 01-05-2009, 09:14 AM   #29
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We should say stock cubes, I doubt I gained jack from the bottom end and my CR is lower then stock with the dish.

BTW, I'd still be stock bottom end if someone hadn't gotten to happy with the flycutting tool.
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Old 01-05-2009, 09:18 AM   #30
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Quote:
Originally Posted by ArthurJGuy...View Post
John how about your heads, are they ported?

No sir, I got the SLP package, that are milled down to 64cc chambers
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