I would like to know the difference between the to because me friend that had a vortec max gets 18MPG and my 1500HD 6.0 0nly gets 10mpg at the best
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I would like to know the difference between the to because me friend that had a vortec max gets 18MPG and my 1500HD 6.0 0nly gets 10mpg at the best
Compression ratio
Are both trucks 4x4? Are both trucks 4L80e trans? Do both trucks have the same rear end gears? Are both quad cabs? It all adds up. Are you both running the same size tires?
most, but not all, of the hd1500 trucks were crew cabs with 4.10 gears and a 4l80e trans and a 325 hp lq4 6.0l. tha max trucks i've seen have been a lq9 345hp 4l65e trans w/3.73 gears... the hd 1500 trucks were 2500 trucks with a 1500 name??? i cant figure out why gm did that???...... the max trucks were 1500 trucks with cadillac engins. the cads have the new 6.2l active fuel management engines at 385 hp and 22 mpg!!!! all the max trucks have the extra cad engines that were not needed by cadillac any more. all my friends that have a hd1500 get 10-12mpg. thats normal for a 8 lug 3/4 ton truck. dont be fooled by the 1500 name.
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most, but not all, of the hd1500 trucks were crew cabs with 4.10 gears and a 4l80e trans and a 325 hp lq4 6.0l. tha max trucks i've seen have been a lq9 345hp 4l65e trans w/3.73 gears... the hd 1500 trucks were 2500 trucks with a 1500 name??? i cant figure out why gm did that???...... the max trucks were 1500 trucks with cadillac engins. the cads have the new 6.2l active fuel management engines at 385 hp and 22 mpg!!!! all the max trucks have the extra cad engines that were not needed by cadillac any more. all my friends that have a hd1500 get 10-12mpg. thats normal for a 8 lug 3/4 ton truck. dont be fooled by the 1500 name.
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ya but what do i need to do to make my motor like that vortec max i need tha MPG Oh and the 1500HD is 1,000Lbs lighter that the 2500HD
if you're staying naturally aspirated, you need the LQ9 pistons to bump the compression up. You need a good tune, Nelson can handle that. While you have it apart replacing pistons, get the heads ported, usually about $500 for that.
ok here is the deal for all thoes like me who want to know there is nothing different between the LQ9 and LQ4 motor the only differance is the computer or the vin# for t he computer it is just the prigraming like timing and so forth. i hade one of my friends at Motor City bakersfield who is nown at the creat king he compared every part of t he 2 motors to the part numbers and found no differance
Umm yeah dude theres more of a difference than that. There is a higher compression rate in the LQ9, which is why it is less attractive for FI than the LQ4. The Crate King was wrong!
You need better friends. :laugh:
<div class='quotetop'>QUOTE(chrisj6 @ Jun 28 2006, 04:56 PM) [snapback]56544[/snapback]</div>SSSHHHHHHHHHH!!!! Don't tell my LQ9 that, I am gonna push 10-12 #s through that beotch!!!Quote:
There is a higher compression rate in the LQ9, which is why it is less attractive for FI than the LQ4.
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ok im just posting what he told me any how if you can finde more than post it
There are two books you can buy on Amazon.com that will be very beneficial for you to read or have for research. The first is How to build high-performance Chevy LS1/LS6 V-8s by Will Hanzel. The other is Chevy LS1/LS6 Performance: High Performance Modifications for Street and Racing
by Chris Endres. You can get both for $26.76 on Amazon.com.
Here is some good reading for you and your friend.
http://www.automotiverebuilder.com/ar/eb040538.htm
The only misprint I saw in there was that it says all 6.0 had flat top pistons. This is not true, the LQ4 have a slight dish to them while the LQ9 are completly flat. I have seen this with my own eyes.
LQ9 have beefier rods and flat top pistons with moly coating on the skirts and thermal barrier on the top.
Everything thing else is the same.
Remember you are also losing more power through the 4l80 trans than the 4l65. I think its 5 to 10 percent more. This would also cause you to get worse fuel milage.
<div class='quotetop'>QUOTE(Zick @ Jun 29 2006, 10:27 AM) [snapback]56637[/snapback]</div>thanks for looking that up but mine is a 2006 not a 05 thats all that it talked aboutQuote:
Here is some good reading for you and your friend.
http://www.automotiverebuilder.com/ar/eb040538.htm
The only misprint I saw in there was that it says all 6.0 had flat top pistons. This is not true, the LQ4 have a slight dish to them while the LQ9 are completly flat. I have seen this with my own eyes.
LQ9 have beefier rods and flat top pistons with moly coating on the skirts and thermal barrier on the top.
Everything thing else is the same.
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<div class='quotetop'>QUOTE(Lethalyoyo @ Jun 29 2006, 08:43 PM) [snapback]56763[/snapback]</div>Doesn't matter, AFAIK they didn't make any changes from 05' to 06'Quote:
thanks for looking that up but mine is a 2006 not a 05 thats all that it talked about
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<div class='quotetop'>QUOTE(Zick @ Jun 29 2006, 08:58 PM) [snapback]56783[/snapback]</div>i'll give you untill sun night :nutz:Quote:
Doesn't matter, AFAIK they didn't make any changes from 05' to 06'
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Some of that stuff listed is not new starting in 06'. IE: My 05' LQ9 uses the all the same length M11 bolts as well. It utilizes the use of metric bolts. All LQ9 had floating wrist pins.
Now I have no idea on the measurements part but I don't see any significant differences.
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Changes may include 1 or more of the following items:
all 6.0 get floating rods now
What is a floating rod?
I was actually referring to this;
• All applications use full-floating design piston pins.
A full floating rod means that the piston pin isn't pressed into the small end of the piston, it slides through freely and rides on a bushing instead. The older GenIII engines have the piston pin pressed into the rod and the piston acts as the bearing for the small end of the rod. The full floating piston pin requires snap rings or wire ring groove cut in the piston pin bores to retain the rod pin. If there are machining problems when cutting the groove, pins have been known to walk out the bore and gouge the cylinder wall. That is a very rare thing to happen, though.
<div class='quotetop'>QUOTE(RedHeartbeat @ Jul 3 2006, 12:46 PM) [snapback]57025[/snapback]</div>Isn't that the same thing as floating wrist pin?Quote:
A full floating rod means that the piston pin isn't pressed into the small end of the piston, it slides through freely and rides on a bushing instead. The older GenIII engines have the piston pin pressed into the rod and the piston acts as the bearing for the small end of the rod. The full floating piston pin requires snap rings or wire ring groove cut in the piston pin bores to retain the rod pin. If there are machining problems when cutting the groove, pins have been known to walk out the bore and gouge the cylinder wall. That is a very rare thing to happen, though.
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Yep, the previous design was not a floating pin.
<div class='quotetop'>QUOTE(RedHeartbeat @ Jul 3 2006, 01:55 PM) [snapback]57030[/snapback]</div>According to the article I posted eariler, the LQ9 6.0 did have a floating pin and I know that article was made way before 06' too.Quote:
Yep, the previous design was not a floating pin.
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Not trying to argue or be a dick, just trying to get the facts.
THE LQ9 HAS HIGHER COMPRESSION AS WHERE THE LQ4 DOES NOT. THE ROD ARE ALSO BEEFIER IN THE LQ9 VS THE LQ4. ALSO, I THINK THE CAM IS A LITTLE DIFFERENT? THE 4L80E TAKES MORE HP TO TURN IT THAN THE 4L65E. THE LQ4 IS A GREAT TURBO/SC MOTOR YOU CAN PUT FORGE SLUGS IN IT AND GOOD HEADS ON IT, RUN UP TO 15PSI WITH NO PROBLEM.
JAMEST :thumb: <div class='quotetop'>QUOTE(Lethalyoyo @ Jun 25 2006, 03:26 AM) [snapback]56204[/snapback]</div>Quote:
I would like to know the difference between the to because me friend that had a vortec max gets 18MPG and my 1500HD 6.0 0nly gets 10mpg at the best
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