241 heads vs 243 heads - LS1TECH

Log In 


Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

241 heads vs 243 heads

Reply
 
Thread Tools Search this Thread
Old 11-30-2008, 08:14 PM   #1
On The Tree
Thread Starter
iTrader: (3)
 
ItalianZ28Stallion's Avatar
 
Join Date: Nov 2007
Location: pleasant hill
Posts: 117
Default 241 heads vs 243 heads

im looking for cheap heads that will add some more power then my 853 heads what should i do. my cam specs are 238/241 609/615. i guess my question is what head will give me more power and will they both bolt right up or will i have to change things?
ItalianZ28Stallion is offline   Reply With Quote
Old 11-30-2008, 09:16 PM   #2
on2
On The Tree
iTrader: (4)
 
Join Date: May 2008
Posts: 173
Default

Unported, 243's will make more power. Both will bolt right up.
on2 is offline   Reply With Quote
Old 11-30-2008, 09:45 PM   #3
TECH Addict
iTrader: (14)
 
djsanchez2's Avatar
 
Join Date: May 2005
Location: Simi Valley, CA.
Posts: 2,730
Default

Slightly more power, but if you are having them ported..... You can save money by going with the 241's. They will cost you $300-400 less, leaving that for the porting which will make them damned near even in terms of flow.

241 = $100-125
243 = $400-500
Hand porting job at a decent shop out here = $300-400
CNC porting from patriot = $600

Most port jobs will flow between 280-300cfm.
djsanchez2 is offline   Reply With Quote
Old 12-01-2008, 01:08 PM   #4
TECH Fanatic
iTrader: (118)
 
snake charmer's Avatar
 
Join Date: Sep 2004
Location: The south
Posts: 1,513
Default

i just did a bit of touching up on some brand new 243s that were bought for $400 brand new and assembled . the touch up along with intake and headers should yield a good gain .
snake charmer is offline   Reply With Quote
Old 12-10-2008, 09:20 AM   #5
TECH Regular
iTrader: (7)
 
TheLSgun's Avatar
 
Join Date: Mar 2008
Location: Winter Springs, FL
Posts: 432
Default

Quote:
Originally Posted by snake charmer View Post
i just did a bit of touching up on some brand new 243s that were bought for $400 brand new and assembled . the touch up along with intake and headers should yield a good gain .
Where can you get some brand new 243's for 400 or around that price?

I'd be interested.
TheLSgun is offline   Reply With Quote
Old 12-10-2008, 09:24 AM   #6
On The Tree
iTrader: (5)
 
after dark's Avatar
 
Join Date: Oct 2005
Location: Texas
Posts: 130
Default

I am doing the same thing (stock 243's on my 2000 T/A)...Are you going to use OEM head bolts or ARP head bolts?
after dark is offline   Reply With Quote
Old 12-10-2008, 09:32 AM   #7
TECH Regular
iTrader: (7)
 
TheLSgun's Avatar
 
Join Date: Mar 2008
Location: Winter Springs, FL
Posts: 432
Default

Where did you get your 243's from?
TheLSgun is offline   Reply With Quote
Old 12-10-2008, 11:08 AM   #8
10 Second Club
iTrader: (63)
 
VIPRETR2's Avatar
 
Join Date: Aug 2004
Posts: 754
Default

Patriot used to sell unported 243s for 4-500 dollars.

Larry
VIPRETR2 is offline   Reply With Quote
Old 12-12-2008, 03:23 AM   #9
Staging Lane
iTrader: (6)
 
Join Date: Apr 2008
Location: Wichita KS
Posts: 53
Default

deleted found my answer
1badrz28 is offline   Reply With Quote
Old 12-12-2008, 03:48 AM   #10
12 Second Club
 
shaun's Avatar
 
Join Date: Nov 2005
Posts: 1,849
Default

what year and engine did the 243's come on? i have a 02 longblock in my car and it has 241's on it.
shaun is offline   Reply With Quote
Old 12-12-2008, 05:13 AM   #11
TECH Regular
iTrader: (7)
 
TheLSgun's Avatar
 
Join Date: Mar 2008
Location: Winter Springs, FL
Posts: 432
Default

243s are the ls6 heads came on the c5 zo6's. They also came on the ls2 GTO's but i believe the valves, and some other specs are different.
TheLSgun is offline   Reply With Quote
Old 12-12-2008, 11:45 AM   #12
12 Second Club
iTrader: (3)
 
Bad Blu Formula's Avatar
 
Join Date: Jan 2002
Location: Houston
Posts: 3,584
Default

Quote:
Originally Posted by TheLSgun View Post
243s are the ls6 heads came on the c5 zo6's. They also came on the ls2 GTO's but i believe the valves, and some other specs are different.
Right. The difference between 243's on an LS6 and ones on an LS2 are that the valves on an LS6 are sodium filled resulting in a lighter valvetrain.
Bad Blu Formula is offline   Reply With Quote
Old 12-12-2008, 02:17 PM   #13
TECH Regular
iTrader: (7)
 
TheLSgun's Avatar
 
Join Date: Mar 2008
Location: Winter Springs, FL
Posts: 432
Default

Quote:
Originally Posted by Bad Blu Formula View Post
Right. The difference between 243's on an LS6 and ones on an LS2 are that the valves on an LS6 are sodium filled resulting in a lighter valvetrain.
Ahhh. I knew it was something like that. Thanks for the info.


So no one knows where to get 243's?
TheLSgun is offline   Reply With Quote
Old 12-12-2008, 03:32 PM   #14
TECH Fanatic
iTrader: (25)
 
Join Date: Nov 2001
Location: SC
Posts: 1,784
Default

www.advancedinduction.com
Shon Herron is offline   Reply With Quote
Old 12-12-2008, 09:17 PM   #15
TECH Regular
 
1969mach1's Avatar
 
Join Date: Jan 2008
Location: Bellaire, TX
Posts: 458
Default

LS2 head $320 same as the LS6 head

http://www.sdpc2000.com/product/1257...dAssembly.aspx
1969mach1 is offline   Reply With Quote
Old 12-13-2008, 08:52 AM   #16
TECH Regular
iTrader: (7)
 
TheLSgun's Avatar
 
Join Date: Mar 2008
Location: Winter Springs, FL
Posts: 432
Default

Thanks, and if i upgrade the vavles with the hollow stem vavles part # 17801930. Then would they be exactly like stock ls6 heads?
TheLSgun is offline   Reply With Quote
Old 12-13-2008, 09:16 AM   #17
Teching In
 
Join Date: Feb 2008
Posts: 2
Default

basically, the c5z had a couple different spring / cam combinations, as the power slightly increased basically every years from 01-04.
andrew04 is offline   Reply With Quote
Old 12-13-2008, 03:07 PM   #18
TECH Regular
 
1969mach1's Avatar
 
Join Date: Jan 2008
Location: Bellaire, TX
Posts: 458
Default

Quote:
Originally Posted by TheLSgun View Post
Thanks, and if i upgrade the vavles with the hollow stem vavles part # 17801930. Then would they be exactly like stock ls6 heads?
The hollow stem kit is $182, I wounder if thats for one head or two?


Question #1: Why by used 243 head for $600 when you can buy NEW 243 heads for $640???? I say $600 because thats what I have seen them go for used...

Question #2: the 243 head flow better than the 241 head, both stock.
But what about just spending the money to have the 241's CNC'ed,
both would the performe the same, wouldn't they????

Last edited by 1969mach1; 12-13-2008 at 06:37 PM.
1969mach1 is offline   Reply With Quote
Old 12-13-2008, 06:34 PM   #19
Teching In
 
Join Date: Dec 2008
Location: St. louis area
Posts: 1
Default

I just purchased a set of ls2 heads and intake off of a 05 gto for $600...Is that a good deal?
project01ss is offline   Reply With Quote
Old 12-13-2008, 06:48 PM   #20
TECH Enthusiast
 
Join Date: Jul 2007
Location: Calgary Alberta
Posts: 609
Default

How much of a performance difference are we talking, on a stock LS1, to go from 241's to 243's?
IRONFIST is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
High CR cnc'd 241 vs cnc'd 243? senicalj4579 Generation III Internal Engine 71 10-14-2014 09:41 PM
What to do to 706 truck heads? 1320Chicken Generation III Internal Engine 1 06-21-2014 09:19 PM
241 vs 243 heads alexnavasws6 New LS1 Owners - Newbie Tech 5 10-05-2013 12:14 AM
241 Heads Lt1Porsche Generation III Internal Engine 31 11-22-2010 05:48 PM
Best heads for lq4 MillersSS Generation III Internal Engine 21 05-09-2009 01:34 PM


Tags
241, 243, 853, assembled, blue, flow, gain, head, heads, ls1, spec, specs, springs, stock, tech

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 05:29 PM.