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Differance between LQ4 and LQ9 6.0L?

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Old Mar 5, 2007 | 11:48 PM
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Default Differance between LQ4 and LQ9 6.0L?
I was Wondering what the differance between the lq9 and lq4 6.0 liter motors were? how much hp do they put out? wieght differance? heads /cam?thanks in advance!
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Old Mar 6, 2007 | 12:17 AM
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Same weight, same heads. Slightly different cams depending on the years. The LQ9 has flat top pistons.
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Old Mar 6, 2007 | 07:15 PM
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what kind of pistons do they lq4 come with? thanks! about how much hp r these motors putting out stock? thanks!
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Old Mar 6, 2007 | 09:22 PM
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Originally Posted by 4yall2nv
what kind of pistons do they lq4 come with? thanks! about how much hp r these motors putting out stock? thanks!
They are dished in the LQ4 and flat-top in the LQ9. Stock the LQ4 puts out almost just as much as the LQ9. The bumped compression ratio of the LQ9 makes it just a little bit higher. Most guys who run some kind of FI run the LQ4 and most people that run n/a or nitrous run the LQ9. I think the compression ratio is LQ4 9.5:1 and LQ9 10:1. The advertised hp ratings for these motor has been changing. It's supposed to be something like LQ4 = 300-325hp and LQ9=345hp+. I remember seeing a stock LQ4 in a truck make something like 28x rwhp.
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Old Mar 7, 2007 | 12:20 AM
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thanks man , really apreciate all da help!!
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Old Aug 2, 2009 | 12:33 PM
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Anyone have pics of the differance? I have a iron shortblock. And they are somewhat dished but veryyy slightly.
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Old Aug 2, 2009 | 04:38 PM
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TTT I need to see the piston pics too.
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Old Aug 2, 2009 | 05:13 PM
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Originally Posted by 383lt1impala
Anyone have pics of the differance? I have a iron shortblock. And they are somewhat dished but veryyy slightly.
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Old Aug 2, 2009 | 05:30 PM
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Yep that's what I have they are the lq4 right? Cuz I expected the dish to be a bit deeper.
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Old Aug 2, 2009 | 10:45 PM
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Originally Posted by 383lt1impala
Yep that's what I have they are the lq4 right? Cuz I expected the dish to be a bit deeper.
All you need for 9.5:1 compression is not that deep of a dish, and if you put a thick enough gasket you are all there. These little engines are great for forced induction.
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