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highest hp #s for stock 5.3 short block and heads

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Old 04-10-2009, 01:21 PM
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Default highest hp #s for stock 5.3 short block and heads
who has the highest hp #s with a stock 5.3 short block and factory heads n/a? what mods do you have for those numbers?
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Old 04-10-2009, 01:23 PM
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I'm thinking bluecajun?
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Old 04-10-2009, 01:43 PM
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I made 350rwhp cam only on my 5.3
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Old 04-10-2009, 01:45 PM
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cam only or cam and full bolt ons? what cam?
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Old 04-10-2009, 01:45 PM
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Mods:
MTI T1 cam
Comp 918s
CAI
AEM long tube headers
2.5" true duals
Stock trans
3.73s
OLSD efi live tune
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Old 04-10-2009, 08:06 PM
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https://www.performancetrucks.net/fo...d.php?t=438267

stock block and heads..
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Old 04-10-2009, 08:33 PM
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I've seen 340rwhp on an '08 5.3 with a 224 cam LT's and a 4k converter.
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Old 04-11-2009, 01:51 AM
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has anyone hit 400rwhp yet? 350 seems to be about the norm
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Old 04-11-2009, 01:54 AM
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rick lowpez hit 400+ 5.3 with tsp 5.3 heads, forgot which cam.
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Old 04-11-2009, 09:45 AM
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I'm sure higher numbers are obtainable, but the result would be reduced low-end power, more so than what the "normal" cam for a 5.3 would.

with the majority of 5.3 vehicles weighing in at, or around 5000+lbs. sacrificing mid-range power for a slightly higher "peak" would probably run even worse.
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