Generation IV Internal Engine 2005-2014 LS2 | LS3 | LS7 | L92 | LS9

6.0 bottom upgrade heads prc225 or fast intake manifold?

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Old 05-22-2018, 12:26 PM
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Default 6.0 bottom upgrade heads prc225 or fast intake manifold?

It's a ls2 block bore the 4.005
stock crank
scat rods
dss forged Pistons with -5cc valve reliefs
patriot performance 5.3 heads 60cc
231/239 comp cam
Ls6 intake
Full exhaust
Racetronix fuel pump
Th400
Bte3800 nitrous stall
12bolt
3.73 gears

the car has been 10.9s @122 on motor and a best of 9.98@135 on a 200shot on really shitty da car weighs 3350 with me in it

Ive just noticed that not a lot of people are still using the ported 5.3 heads on 6.0 motors guess they just don’t flow enough

my question is I’m looking to go faster and upgrade I have about a 1000-200 to play with was thinking of selling my patriot 5.3s and buying the Prc as Cast 225 heads or L92 Heads or just leaving it as is and upgrading to a fast 102 would love to do both but budget won’t allow it any personal experience or advice is appropriated
Old 05-22-2018, 02:39 PM
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I run PRC 5.3 heads on a 6.0, and for what it is I'm happy with them. I vote changing the intake
Old 05-22-2018, 02:57 PM
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I would add an easy 100-150 shot, hit it in 2nd and have in come on easy. Wouldn't bother with a Fast 92 you will get you probably 15hp and lucky if you see a tenth. A good set of AFRs would be my next choice after nitrous.

Edit didn't read the whole post. You are good with the nitrous haha. Afr heads for sure. Work with mamo to get the valvetrain as stable and light as possible.
Old 05-22-2018, 03:12 PM
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Originally Posted by HCI2000SS
I run PRC 5.3 heads on a 6.0, and for what it is I'm happy with them. I vote changing the intake
^^^^^^^^^^Agreed^^^^^^^^^^
A Fast 92 is worth 12-20 RWHP & lb' from 3000-6500 RPM a FAST 102, 18-25 over
the same 3000-6500 with your current cam & Heads. Upgrading your heads with the same
LS6 Intake will kill 1/2 the potential gain of the new Heads.
Old 05-22-2018, 08:23 PM
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I was thinking the same thing since it’s running pretty good as is I’m sure with better weather it’s got a 9.70 in it so the intake mite help pick up more gains on the nitrous as well thanks for the responses guys
Old 05-22-2018, 08:25 PM
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Default Thought I’d post some pics



Old 05-23-2018, 10:11 AM
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90mm LS6 intake and heads.
Old 05-23-2018, 11:35 AM
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At this point the biggest restriction is gonna be the intake. Upgrade that next, even a 92mm FAST at this point would be great.
Old 05-23-2018, 01:34 PM
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Ported Dorman LS2 intake with radius rods and PRC 225s.
Old 05-23-2018, 04:53 PM
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I would do a Ported Fast 102 before I swapped heads.
Old 05-24-2018, 08:07 PM
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I’m not going to lie I was looking at those Dorman ls6 90mm intakes I’m just not sure if they really flow any better the a normal ls6
i also thought of the L92 Heads and ls3 intake a buddy of mine has a car similar to my setup but always gets better mph with his l92 headed car I 60ft better so I’m still faster but I’m sure he’s making a little more power

my goal is to get my car in the 100mph range in the 1/8 on motor alone best so far ever has been 97




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