NOT AGAIN... 
lq9 / lq4 ?
um, all the 6.0 heads are the same. Well, there are a couple different versions based on the casting process.
The CR difference between the 2 motors is the difference, not the heads. LQ9 = flat top pistons, LQ4 = dished pistons.
The CR difference between the 2 motors is the difference, not the heads. LQ9 = flat top pistons, LQ4 = dished pistons.
Staging Lane
Joined: Jun 2002
Posts: 68
Likes: 0
From: Palm Beach, FL
Originally Posted by y2khawk
not again what?
the question of differences and power etc.
I will admit it is asked more over on LS1.com
Last edited by 10thanvhawk; Jan 8, 2004 at 04:27 PM.
Thread Starter
TECH Resident
Joined: Aug 2003
Posts: 948
Likes: 0
From: orlando, florida
It`s asked so much because nobody so far has been able to answer it. Two sets of heads two differant part #s . Some say there is no differance but they can`t tell us why GM used two differant part #s for the same heads. Some say the lq9 heads are better but know one has flow numbers or proof. just wondering if somone had flowed them and put this debate to rest. Sorry.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Thread Starter
TECH Resident
Joined: Aug 2003
Posts: 948
Likes: 0
From: orlando, florida
OK now i understand whats going on, thanks. If you don`t mind me asking I read in one of your other posts that you arent using your O2 sensors. i would like to do this also what Do i need to do to run that way and how would i go about tuning this way?
You basicically set the Temp to enable closed loop to the max value it will take. Then turn off all the 02 sensor codes.
You'll have to dial in your IFR and MAF with a WB O2 after turning them off, or dial them in based off L-trims before you pull the sensors.
If you're not gonna run leaded fuel, stick with them. No reason not to in that case.
You'll have to dial in your IFR and MAF with a WB O2 after turning them off, or dial them in based off L-trims before you pull the sensors.
If you're not gonna run leaded fuel, stick with them. No reason not to in that case.
Originally Posted by MIGHTYMOUSE
wonder which one came from the plant putting out the ls6 block.. they had the denser aluminum or somethin to that affect.. was that the mexico one? sonic test!
-Geoff