Heads? - LS1TECH

Go Back   LS1TECH > VEHICLE SPECIFIC FORUMS > LS4 Performance
Log In 
Search


LS4 Performance Grand Prix GXP | Monte Carlo SS | Impala SS | LaCrosse Super


Heads?

Reply
 
Thread Tools Search this Thread
Old 05-27-2010, 06:31 AM   #1
Staging Lane
 
Trader Rating: 0
Join Date: May 2010
Posts: 56
Default Heads?

so ive been reading of some of the gxp guys getting heads for there ls4's. my question is are they buying factory heads and porting them theirselves or is there an actual performance head out there? from what chevy has said the ls6 head will not fit the 5.3 ls4 so ya im gettin a little irritated with that, haha, any info will help. thanks
chevySS08 is offline   Reply With Quote
Old 05-27-2010, 07:38 AM   #2
TECH Fanatic
 
williamGT's Avatar
 
Trader Rating: 5
Join Date: Jul 2008
Location: Yellowknife NT Canada
Posts: 1,467
Send a message via MSN to williamGT
Default

The 5.3 LS4 has the LS6 heads.
__________________
Summer car: Paid off on June 2014
2009 Pontiac G8 GT Panther metallic black, Onyx/Red interior. DT shorty headers, Catless, Solo Mach cat-back, sport metallic pedals, Roto-Fab intake, Powerbond underdrive pulley, GXP front bumper, GXP rear diffuser, Roto-Fab rad cover, Holden 6.0 V8 badges, Oil Pressure, Oil Temp and Battery gauges on center dash (Atari style) and DOD de-activated.

williamGT is offline   Reply With Quote
Old 05-27-2010, 08:14 AM   #3
TECH Addict
 
94ss06gxp's Avatar
 
Trader Rating: 5
Join Date: Aug 2009
Location: Mid MI
Posts: 2,351
Default

Quote:
Originally Posted by williamGT View Post
The 5.3 LS4 has the LS6 heads.
yup
__________________
2012 Mustang GTWhite M6, Brembo, 3.73, Bama tune, Lethal o/r X, Corsa 2006 TBSS - 219/227 .606/.613 112+2, SW long tubes, LS2 Portworks, IeatSRT CAI, FMS Tune, Nitrous Works 150shot, stg 6 4l70, MidwestLSX 3200 stall, Kbees Coilovers. SOLD . .2008 G8 GT White- SOLD. . .1997 Camaro Z28/SS Clone -M6, Kooks, Cammed, Milled, Ported, Polished, Geared, etc.SOLD . . 2006 Grand Prix GXP[/COLOR] - HPtuned, Magnaflow. . .
94ss06gxp is offline   Reply With Quote
Old 05-27-2010, 08:52 AM   #4
Launching!
 
Trader Rating: 0
Join Date: Mar 2010
Location: Morristown, IN
Posts: 265
Default

See sittingmongoose's statement a few posts down...

http://www.ls1tech.com/forums/ls4-fr...ng-boring.html
indynotch50 is offline   Reply With Quote
Old 05-27-2010, 11:40 AM   #5
Staging Lane
 
Trader Rating: 0
Join Date: May 2010
Posts: 56
Default

so basically the guy at chevy is an idiot then? wow
chevySS08 is offline   Reply With Quote
Old 05-27-2010, 11:44 AM   #6
TECH Addict
 
AlabamaGuy's Avatar
 
Trader Rating: 5
Join Date: Jun 2009
Posts: 2,802
Default

I believe we have smaller valves but the castings are the same. 243s
__________________
06 MCSS- SOLD
99 4Runner- DD on 33's
85 Toyota Corolla AE86- Track/Drift
AlabamaGuy is offline   Reply With Quote
Old 05-27-2010, 04:03 PM   #7
Staging Lane
 
Trader Rating: 0
Join Date: May 2010
Posts: 56
Default

k last question, i need an opinion im going to do a custom exhaust, 2 1/2 inch piping, which do you alls think sounds better the magnaflow mufflers or the flowmaster 40 series? i like both, hate my indesiciveness
chevySS08 is offline   Reply With Quote
Old 05-27-2010, 04:06 PM   #8
TECH Addict
 
AlabamaGuy's Avatar
 
Trader Rating: 5
Join Date: Jun 2009
Posts: 2,802
Default

Quote:
Originally Posted by chevySS08 View Post
k last question, i need an opinion im going to do a custom exhaust, 2 1/2 inch piping, which do you alls think sounds better the magnaflow mufflers or the flowmaster 40 series? i like both, hate my indesiciveness
Don't buy a Flowmaster. Anything but a Flowmaster.

But why limit yourself to those 2 mufflers? There are a ton of choices in the aftermarket.
__________________
06 MCSS- SOLD
99 4Runner- DD on 33's
85 Toyota Corolla AE86- Track/Drift
AlabamaGuy is offline   Reply With Quote
Old 05-27-2010, 06:28 PM   #9
TECH Fanatic
 
Trader Rating: 3
Join Date: Feb 2009
Location: Highland, MI
Posts: 1,294
Default

same style heads but smaller intake valve. The bigger intake valve will work but I haven't seen any data that supports a hindrance or gain in power. Yes, you do get the benefit of the bigger valve but the small bore increases shrouding sooooooo. But anyways, stock ported heads will flow pretty damn good, if you're adding a cam get them milled and up the compression.
__________________
1999 TA, 98mm fast toys, 85mm MAF, 11.1:1, CNC 243, EPS custom cam, LS6 intake, Ported TB, 1 3/4", stock catback with flowmaster 80, 4" cutout, UD pulley, 4L80E, Precision 4K, HPT, 2.73 gears, billet diff cover, nitto NT's

2000 GTP 13.2@104 on street tires, retired.
JDMC5 is offline   Reply With Quote
Old 05-27-2010, 07:32 PM   #10
TECH Addict
 
AlabamaGuy's Avatar
 
Trader Rating: 5
Join Date: Jun 2009
Posts: 2,802
Default

Quote:
Originally Posted by JDMC5 View Post
same style heads but smaller intake valve. The bigger intake valve will work but I haven't seen any data that supports a hindrance or gain in power. Yes, you do get the benefit of the bigger valve but the small bore increases shrouding sooooooo. But anyways, stock ported heads will flow pretty damn good, if you're adding a cam get them milled and up the compression.
Thanks for backing me up on this, JDM. There is absolutely no point in putting aftermarket heads on these motors without some kind of crazy setup. Our cam and intake don't allow full use of the stockers as it is, and to be honest, we don't have any header choices that will accompany good, high RPM power (ie LTs). Bump compression and let her ride.
__________________
06 MCSS- SOLD
99 4Runner- DD on 33's
85 Toyota Corolla AE86- Track/Drift
AlabamaGuy is offline   Reply With Quote
Old 05-27-2010, 08:11 PM   #11
Launching!
 
Trader Rating: 0
Join Date: Mar 2010
Location: Morristown, IN
Posts: 265
Default

Quote:
Originally Posted by AlabamaGuy View Post
Don't buy a Flowmaster. Anything but a Flowmaster.

But why limit yourself to those 2 mufflers? There are a ton of choices in the aftermarket.
Man why hate on the flowmasters? Those were the hot ticket for years. Ha. I tend to like them.
Anywho. He's right. The bad part is they don't make kits for these cars. The good part is that they don't kits and you get to explore different routes. A lot of guys use spintechs.
indynotch50 is offline   Reply With Quote
Old 05-27-2010, 08:40 PM   #12
TECH Addict
 
AlabamaGuy's Avatar
 
Trader Rating: 5
Join Date: Jun 2009
Posts: 2,802
Default

Quote:
Originally Posted by indynotch50 View Post
A lot of guys use spintechs.
Never looked back either.
__________________
06 MCSS- SOLD
99 4Runner- DD on 33's
85 Toyota Corolla AE86- Track/Drift
AlabamaGuy is offline   Reply With Quote
Old 05-28-2010, 12:22 AM   #13
TECH Fanatic
 
Trader Rating: 3
Join Date: Feb 2009
Location: Highland, MI
Posts: 1,294
Default

No problem. Don't quote me on that though, haha.

FWIW, I have a magazine where they put larger valve heads on a 5.3 with a big cam, fast intake and long tubes, the made 458hp..........
__________________
1999 TA, 98mm fast toys, 85mm MAF, 11.1:1, CNC 243, EPS custom cam, LS6 intake, Ported TB, 1 3/4", stock catback with flowmaster 80, 4" cutout, UD pulley, 4L80E, Precision 4K, HPT, 2.73 gears, billet diff cover, nitto NT's

2000 GTP 13.2@104 on street tires, retired.
JDMC5 is offline   Reply With Quote
Reply


Tags
53, fit, heads, ls4, ls6, ported


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


 

All times are GMT -5. The time now is 04:45 PM.


Powered by vBulletin® Version 3.8.7 AC2
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Advertising - Terms of Service - Privacy Statement - Terms of Service - JOBS
Emails & Contact Details