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LS1 Heads vs LS3

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Old Mar 29, 2011 | 10:56 PM
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Default LS1 Heads vs LS3
Is there a thread that compares a factory 2001 LS1 head to a factory LS3 head? Any info would help. Thank you guys Poncho
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Old Mar 30, 2011 | 08:46 AM
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Theres many articles on them in GM High Tech. They are totally different designs
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Old Mar 30, 2011 | 10:59 AM
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Yup please be a little more specific. They are totally different.
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Old Mar 30, 2011 | 01:28 PM
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Well to be honest I need to prove to my insurance company that an LS3 head would be a better choice of head than a factory head.
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Old Mar 30, 2011 | 02:02 PM
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If you are trying to put a LS3 Head on a LS1 Block then you are wasting time..
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Old Mar 30, 2011 | 02:47 PM
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Why would I be wasting my time? I am putting it on a lq9 so if you were referring to the 4" bore I already have that covered.
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Old Mar 30, 2011 | 04:31 PM
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Originally Posted by smokinponcho73
Why would I be wasting my time? I am putting it on a lq9 so if you were referring to the 4" bore I already have that covered.
K...let me help..

Originally Posted by ultradriver10000
Yup please be a little more specific.
^^What this guy said.

Judging by your sig pic and what you asked I bet everyone here would think you were putting them on a LS1..details help.

What do you want to know about the LS3's? They kick the **** out of a stock set of 241's.

Stock flow is around 320 cfm Intake, 210 Exhaust, 261cc Intake Runners.
Valves are Sodium filled, 2.16"/1.59", chambers are around 65cc from what I have seen. You will need the Offset Intake Rockers.

I know more of the specifics on the L92 Heads, not much difference tho, just the chamber.
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Old Apr 4, 2011 | 09:22 AM
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Just get a price quote from a qood Chevy parts house on both and see what the price delta is. Price out L92 heads vs the LS1 heads and it may well be a small enough difference to keep you in the game. L92 heads may actually be cheaper, that's the case if you compare GTO LS1 heads (243s) to the L92s below from SD. I think that's a winnable battle though if you're trying to get them to cover the cost of a complete drivetrain replacement, you likely won't get that - nor should you.

http://sdparts.com/details/gm-factor...parts/12582713
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Old Apr 22, 2011 | 05:36 PM
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Originally Posted by smokinponcho73
Well to be honest I need to prove to my insurance company that an LS3 head would be a better choice of head than a factory head.
Point out to them that the head is less expensive and that brand new LS1 less efficient in terms of MPG and Emissions and that you "really want to do your part to save the Earth from Climate Change" . . .

If they "buy" that lie, GREAT . . . If they don't, just show them how much cheaper they are ! Try referring to them as "L92" heads to get away from the "high-performance" stigma . . .

Dave
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Old Apr 23, 2011 | 03:42 AM
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243s are ls2 ls6 heads. 241 is a ls1 head 04 gto included.
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Old Apr 23, 2011 | 02:01 PM
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can you put an ls3 head on a 2011 5.3 liter truck?
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Old Apr 23, 2011 | 06:29 PM
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^ No. Different bore. Need 4" or bigger bore.
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Old Apr 30, 2011 | 09:49 PM
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An ls2 can wear ls3 heads right?
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Old Apr 30, 2011 | 10:23 PM
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^ I'm pretty sure. But there is a .060" difference in bore.
Last edited by bayer-z28; Apr 30, 2011 at 10:30 PM.
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Old Apr 30, 2011 | 10:40 PM
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Kool!!
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Old Nov 6, 2011 | 04:58 AM
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Originally Posted by Blk_Ws6
An ls2 can wear ls3 heads right?
Yes they can.
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