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GM LS3 LS376/525 Crate Motor

Old 10-11-2018, 08:31 PM
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A regular production ls3 with just dyno headers on an engine dyno is almost 500 hp

http://www.superchevy.com/how-to/eng...ick-boomerang/
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Old 10-11-2018, 11:15 PM
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Originally Posted by big hammer View Post
A regular production ls3 with just dyno headers on an engine dyno is almost 500 hp

http://www.superchevy.com/how-to/eng...ick-boomerang/
Thanks for posting this article!

I had read that article a while back but I was paying attention to the aftermarket cams. I did not connect the dots. This quote from their testing says it all:
the LS3 crate motor was configured on the dyno with a set of long-tube headers, a complete Aeromotive fuel system, and tuned to perfection with the Holley Performance HP EFI system. Not surprisingly, the stock cam offered plenty of idle vacuum (over 20 inches) and acceptable peak power numbers. The baseline pulls produced peak numbers of 496 hp at 5,800 rpm, and 491 lb-ft of torque at 4,700 rpm. The measure piston-to-valve clearance exceeded .150, meaning, it was more than adequate for performance use.
I have also asked the dealer who I bought the 525 from to go back and ask GM Performance. If they are advertising Net HP on the stock crate and Gross HP on the other Crates, as demonstrated by this SuperChevy test, that is highly misleading.
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Old 10-12-2018, 06:46 AM
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Originally Posted by big hammer View Post




no im correct. The 525 is not an SAE net rating.
It's not net. But it's also not gross.
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Old 10-12-2018, 09:47 AM
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Originally Posted by Marc 85Z28 View Post
It's not net. But it's also not gross.
What is it then? Not being a smartass, just want to know...
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Old 10-12-2018, 10:58 AM
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Originally Posted by G Atsma View Post
What is it then? Not being a smartass, just want to know...
Go back and read?
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Old 10-12-2018, 02:56 PM
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Instead of your snarky answer, it would have been easier to just say which measuring method was used. Thanks for nothing.
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Old 10-13-2018, 10:35 PM
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Originally Posted by rdymond View Post
Thanks for posting this article!

I had read that article a while back but I was paying attention to the aftermarket cams. I did not connect the dots. This quote from their testing says it all:


I have also asked the dealer who I bought the 525 from to go back and ask GM Performance. If they are advertising Net HP on the stock crate and Gross HP on the other Crates, as demonstrated by this SuperChevy test, that is highly misleading.
yes it is and the 525 really kinda sucks lol
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