LS1TECH - Camaro and Firebird Forum Discussion

Forced Induction Superchargers | Turbochargers | Intercoolers

317 Heads on ls1... too much misinformation.Help...

Thread Tools
 
Search this Thread
 
Old Sep 23, 2009 | 11:07 AM
Share
  #1  
spaz1's Avatar
spaz1
Thread Starter
12 Second Club
iTrader: (9)
 
Joined: Apr 2008
Posts: 629
Likes: 1
From: Calgary Ab. Canada
Default 317 Heads on ls1... too much misinformation.Help...
Hey I was searching for this and am finding all kinds of info that contradict eachother. I thought you could just bolt a set on and go.. As far as i could tell they were the same ports as the 243 heads but with a 72 cc chamber. I read that you need to run a 4" bore for them to work and that the ls6 intake wouldn't work and supposidly the rocker arms are different. Can the people running these heads on stock bore ls1 help me out. I want to drop the c/r and crank up the boost.
Thanks,Chris.
Reply
0
Old Sep 23, 2009 | 11:14 AM
Share
  #2  
Super Slow SS's Avatar
Super Slow SS
TECH Enthusiast
iTrader: (9)
 
Joined: Oct 2005
Posts: 702
Likes: 0
From: Greenville, Raleigh NC
Default
Bolt them straight on, I have the ls6 intake that came factory on my car, bolts right up, you will need 6.0 head gaskets but other than that and a change in the exhaust ports (stock manifolds will bolt up, just different shape ports) they are the same head.
Reply
0
Old Sep 23, 2009 | 11:18 AM
Share
  #3  
sujomatt's Avatar
sujomatt
TECH Resident
iTrader: (7)
 
Joined: Dec 2008
Posts: 796
Likes: 0
From: CT
Default
^^^^ what this guy said!
Reply
0
Old Sep 23, 2009 | 11:27 AM
Share
  #4  
mcmillion's Avatar
mcmillion
TECH Apprentice
iTrader: (5)
 
Joined: Aug 2004
Posts: 374
Likes: 0
From: Rio Rancho, NM
Default
^^^^^^Yup, worked for me too!
Reply
0
Old Sep 23, 2009 | 11:43 AM
Share
  #5  
WS6HUMMER's Avatar
WS6HUMMER
10 Second Club
iTrader: (19)
 
Joined: Feb 2004
Posts: 2,542
Likes: 2
From: Alexandria La.
Default
^^^Same as these guys here, just did mine a week ago.
Reply
0
Old Sep 23, 2009 | 12:24 PM
Share
  #6  
98Z28CobraKiller's Avatar
98Z28CobraKiller
Restricted User
iTrader: (17)
 
Joined: Nov 2005
Posts: 5,783
Likes: 5
From: WPB, FL
Default
Looks like you are confusing the 317's with the L92's. The 317's are a direct replacement to your stock heads.
Reply
0
Old Sep 23, 2009 | 12:49 PM
Share
  #7  
NemeSS's Avatar
NemeSS
TECH Senior Member
20 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (127)
 
Joined: Sep 2005
Posts: 6,889
Likes: 9
From: Houston,TX
Default
the 317 will even work on a 3.78 4.8/5.3 bore
Reply
0

Trending Topics

Old Sep 23, 2009 | 12:55 PM
Share
  #8  
BIG_MIKE2005's Avatar
BIG_MIKE2005
12 Second Club
20 Year Member
iTrader: (116)
 
Joined: Jun 2005
Posts: 5,221
Likes: 1
From: Skiatook, OK
Default
Originally Posted by 98Z28CobraKiller
Looks like you are confusing the 317's with the L92's. The 317's are a direct replacement to your stock heads.
I would have to agree 100%
Reply
0
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Sep 23, 2009 | 01:12 PM
Share
  #9  
Inspector12's Avatar
Inspector12
TT-TECH Veteran
20 Year Member
iTrader: (29)
 
Joined: Mar 2003
Posts: 4,779
Likes: 4
From: Pearland
Default
These guys are telling you the truth a 6.0L gasket and bolt up. Although the chamber size is not 72cc they are 65cc chambers if I remember correctly I have a spreadsheet of all the head specs, but don't have it handy so I shot this off the top of my head. I know its real close to 65 though. GL!
Reply
0
Old Sep 23, 2009 | 01:18 PM
Share
  #10  
conan's Avatar
conan
TECH Senior Member
20 Year Member
iTrader: (5)
 
Joined: May 2004
Posts: 6,492
Likes: 6
From: Back in the Burg
Default
One more with 317 heads on a 347ci with 4.030" cometics @ .051" thick. LS6 intake too.
Last edited by conan; Sep 23, 2009 at 01:38 PM.
Reply
0
Old Sep 23, 2009 | 01:18 PM
Share
  #11  
67Firebird455's Avatar
67Firebird455
12 Second Club
20 Year Member
Photogenic
Photoriffic
Liked
iTrader: (27)
 
Joined: Sep 2004
Posts: 2,552
Likes: 12
From: Visalia, California
Default
I have a set of #317's on my 4.8 in my firebird. LSx manifolds/headers bolt right up. Make sure to use the 6.0 gasket and you're good to go!
Reply
0
Old Sep 23, 2009 | 01:25 PM
Share
  #12  
Pro Stock John's Avatar
Pro Stock John
LS1Tech Co-Founder
20 Year Member
Community Influencer
iTrader: (34)
 
Joined: Nov 2001
Posts: 45,333
Likes: 1,768
From: Chicago, IL
Default
Originally Posted by spaz1
Hey I was searching for this and am finding all kinds of info that contradict eachother. I thought you could just bolt a set on and go.. As far as i could tell they were the same ports as the 243 heads but with a 72 cc chamber. I read that you need to run a 4" bore for them to work and that the ls6 intake wouldn't work and supposidly the rocker arms are different. Can the people running these heads on stock bore ls1 help me out. I want to drop the c/r and crank up the boost.
Thanks,Chris.
I ran ported 317's, 6.0 gaskets, on top of a 3.910 bore LS6 block. Ran an LS6 intake. Went 9.40. Was happy.
Reply
0
Old Sep 23, 2009 | 05:45 PM
Share
  #13  
shawn_c992001's Avatar
shawn_c992001
Launching!
 
Joined: Jul 2005
Posts: 263
Likes: 0
From: Arnett WV
Default
They (317's) have 72cc chambers that's the reason why they drop the compression ratio when installed with stock rods & pistons.
Reply
0
Old Sep 23, 2009 | 06:02 PM
Share
  #14  
lowbirdws6's Avatar
lowbirdws6
On The Tree
iTrader: (62)
 
Joined: Jul 2005
Posts: 105
Likes: 0
From: La Honda, CA
Default
317's do have 72cc chambers! The one's I have do anyway!
Reply
0
Old Sep 23, 2009 | 08:02 PM
Share
  #15  
spaz1's Avatar
spaz1
Thread Starter
12 Second Club
iTrader: (9)
 
Joined: Apr 2008
Posts: 629
Likes: 1
From: Calgary Ab. Canada
Default
Originally Posted by 98Z28CobraKiller
Looks like you are confusing the 317's with the L92's. The 317's are a direct replacement to your stock heads.
Yeah I think that's what happend..

thanks.
Reply
0
Old Sep 23, 2009 | 08:14 PM
Share
  #16  
WS6HUMMER's Avatar
WS6HUMMER
10 Second Club
iTrader: (19)
 
Joined: Feb 2004
Posts: 2,542
Likes: 2
From: Alexandria La.
Default
Originally Posted by spaz1
Yeah I think that's what happend..

thanks.
I agree.
Reply
0
Old Sep 23, 2009 | 08:21 PM
Share
  #17  
elias_799's Avatar
elias_799
TECH Addict
iTrader: (8)
 
Joined: Oct 2008
Posts: 2,047
Likes: 2
From: toronto ontario canada
Default
just make sure you use the 6.0 head gaskets, if you use the 5.7 ones they will overhang in to the combustion chamber and that will cause allot of issues.
Reply
0
Tags
Back to Subforum
Forced Induction
View Next Unread
Show me your front mount turbo exhaust setup




Advanced Search

All times are GMT -5. The time now is 04:56 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE