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

LQ9 Build Suggestions

Thread Tools
 
Search this Thread
 
Old Jan 23, 2013 | 01:19 PM
  #1  
67rally's Avatar
Thread Starter
TECH Apprentice
iTrader: (5)
 
Joined: Aug 2011
Posts: 312
Likes: 3
From: Boston
Default LQ9 Build Suggestions

Hi everyone,
I just picked up a low mile LQ9 from an '04 Escalade that will be going into my '67 Camaro, and would like some suggestions on what heads and cam to go with. I have a T56 arriving later this week.

My first thoughts for the heads were stock 243/799's or L92/LS3. Someone else suggested a set of 5.3's, but I heard they don't flow as well, just give a compression bump?

Important info:
- I will be using an Edelbrock Vic Jr. EFI intake with a 4 barrel throttle body
- This is not a daily driver, but not a strip car either, so driveability is somewhat important
- Budget is always a concern...

I want the Vic Jr/TB setup so it kind of retains that old school look, but with the advantage of EFI. I know that the Vic Jr. is better for high rpm, and gives up a little on the low end, so I'd like to find a set of heads and cam that can pick up some of that low end grunt. Once I figure out a set of heads, then I can start thinking about the cam. Also, I already have the Accufab 4150 TB, I don't have the Vic Jr. yet since I know they make one for the cathedral ports and one for the rectangular ports.
Reply
Old Jan 25, 2013 | 05:52 AM
  #2  
67rally's Avatar
Thread Starter
TECH Apprentice
iTrader: (5)
 
Joined: Aug 2011
Posts: 312
Likes: 3
From: Boston
Default

Anyone?
Reply
Old Jan 25, 2013 | 07:41 AM
  #3  
outkast6991's Avatar
TECH Fanatic
iTrader: (34)
 
Joined: Jun 2004
Posts: 1,625
Likes: 0
From: lancaster,pa
Default

For a budget deal grab a set of 243's and have a GOOD vj/bowl blend done on them. Grab a super Vic and a cam to match and you'll see upper 400's rwhp
Reply
Old Jan 25, 2013 | 08:35 AM
  #4  
67rally's Avatar
Thread Starter
TECH Apprentice
iTrader: (5)
 
Joined: Aug 2011
Posts: 312
Likes: 3
From: Boston
Default

Originally Posted by outkast6991
For a budget deal grab a set of 243's and have a GOOD vj/bowl blend done on them. Grab a super Vic and a cam to match and you'll see upper 400's rwhp
How streetable is that Super Vic, and would my Accufab 4150 bolt right up?
Reply
Old Jan 25, 2013 | 11:14 AM
  #5  
PREDATOR-Z's Avatar
TECH Senior Member
 
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Default

Just get the stock heads you have now ported by like AI and sized for proper compression.
Reply
Old Jan 25, 2013 | 02:56 PM
  #6  
67rally's Avatar
Thread Starter
TECH Apprentice
iTrader: (5)
 
Joined: Aug 2011
Posts: 312
Likes: 3
From: Boston
Default

Originally Posted by PREDATOR-Z
Just get the stock heads you have now ported by like AI and sized for proper compression.
Won't I run into PTV clearance issues if I have the heads milled too much?

What's a better option?

-Higher flowing heads/smaller cam/higher compression (ported/milled 317's)
-Higher flowing heads/bigger cam/lower compression (ported/unmilled 317's)
-Lower flowing heads/bigger cam/higher compression (stock 243/799's)
Reply
Old Jan 25, 2013 | 03:35 PM
  #7  
outkast6991's Avatar
TECH Fanatic
iTrader: (34)
 
Joined: Jun 2004
Posts: 1,625
Likes: 0
From: lancaster,pa
Default

243's and 317's flow about the same with 243's being slightly better. Use the best head you can with the most compression for the fuel your running and cam it accordingly
Reply
Old Jan 25, 2013 | 04:34 PM
  #8  
KCS's Avatar
KCS
Moderator
20 Year Member
Liked
Loved
Community Favorite
iTrader: (20)
 
Joined: Mar 2005
Posts: 8,859
Likes: 323
From: Conroe, TX
Default

Originally Posted by 67rally
Hi everyone,
I just picked up a low mile LQ9 from an '04 Escalade that will be going into my '67 Camaro, and would like some suggestions on what heads and cam to go with. I have a T56 arriving later this week.

My first thoughts for the heads were stock 243/799's or L92/LS3. Someone else suggested a set of 5.3's, but I heard they don't flow as well, just give a compression bump?

Important info:
- I will be using an Edelbrock Vic Jr. EFI intake with a 4 barrel throttle body
- This is not a daily driver, but not a strip car either, so driveability is somewhat important
- Budget is always a concern...

I want the Vic Jr/TB setup so it kind of retains that old school look, but with the advantage of EFI. I know that the Vic Jr. is better for high rpm, and gives up a little on the low end, so I'd like to find a set of heads and cam that can pick up some of that low end grunt. Once I figure out a set of heads, then I can start thinking about the cam. Also, I already have the Accufab 4150 TB, I don't have the Vic Jr. yet since I know they make one for the cathedral ports and one for the rectangular ports.
Forget the rectangle ports if you're concerned with low end. A set of 243/799 castings with a good valvejob and blending will work really well. The 5.3L truck castings are another option. They're dirt cheap, but really need a bigger valve to be a decent performance oriented head.
Reply
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 Jan 26, 2013 | 04:14 AM
  #9  
PREDATOR-Z's Avatar
TECH Senior Member
 
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Default

Originally Posted by 67rally
Won't I run into PTV clearance issues if I have the heads milled too much?

What's a better option?

-Higher flowing heads/smaller cam/higher compression (ported/milled 317's)
-Higher flowing heads/bigger cam/lower compression (ported/unmilled 317's)
-Lower flowing heads/bigger cam/higher compression (stock 243/799's)
You can get the chambers you desire without milling. Ai would weld and fill the chambers to desired volume. keeping stock valves would then leave you with stock ptv clearance. I've used that tech before on a setup where I wanted 59cc chambers but no mill. I used 241 castings to obtain my results. Any head that can flow 300cfm by .600 lifts would be plenty for huge power on stock cubes.
Reply




All times are GMT -5. The time now is 09:32 AM.

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