Vortec-6000
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12/11/03
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From: PA
Truck: 2004 2500
Mods: 7
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10/30 4:09a
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I have been trying to fins a set of flow numbers for the LQ4 heads so I can plug it into my desktop dyno program. Does anyone have the numbers or have a link where I can get it at. I found the L92 numbers in a Car Craft article which it stated were similar to the LQ4. They actually said they performed almost the same on their dyno engine. Once I get these flow numbers in I will have a LQ4 engine in the desktop dyno to begin putting in cam spec to look for the best torque curve.
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cjriojas 
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2/26/05
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From: TX
Truck: 2002 1500
Mods: 7
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11/6 9:18a
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The lq4/9 heads dont flow near what the 92`s do. they flow like 350+ out the box.
I got lots of info on that, let me look for it
Chris
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cjriojas
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Posts: 1,539
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2/26/05
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From: TX
Truck: 2002 1500
Mods: 7
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cjriojas
SS Member
Posts: 1,539
Registered:
2/26/05
Status:
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From: TX
Truck: 2002 1500
Mods: 7
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11/6 9:34a
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Vortec, you are on the wrong website when it comes to performance. I know a few that have just a massive amount of info when it comes to anything LS. Dont think the mods would like posting links though 
Chris
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Vortec-6000
SS Member
Posts: 2,029
Registered:
12/11/03
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From: PA
Truck: 2004 2500
Mods: 7
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11/6 9:06p
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Thanks for those flow numbers I plugged them into my program. Just going to the Comp Cam XR259HR 54-408-11 (800-5800RPM) that with just a set of large tube headers with cats and mufflers (not open exhaust) will get 410 HP and 410 lbs/ft torque out of the LQ4. Putting larger valves in it and the flat top pistons like the LQ9 should get me over the 450HP/450lbs/ft mark. That paired up with the 4.56 gears I am going to switch over to from the 4.10 should get me some nice pulling power or red light rice intimidating power.
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Matsktr
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9/26/07
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From: TX
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11/7 9:55a
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^^^^^^ wow your getting a hundred more hp just from headers and a cam --- tose lq4`s are cheap.... maybe there will be a swap in my truck
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cjriojas
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Posts: 1,539
Registered:
2/26/05
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From: TX
Truck: 2002 1500
Mods: 7
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11/7 1:12p
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Yup, 100 hp out of a cam tune and heads is fairly easy. Depending on the cam, you can get even more. You can get 100 extra out of a 5.3 with a good exhaust, tune and cam. Ls engines respond very well to mods.
Chris
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