internal difference 525 and 500efi
08-06-2009, 04:54 PM
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internal difference 525 and 500efi
I was talking to a friend today and now am not all sure what the difference is. What is the difference between the 500 and 525. I know the cams, heads, exhaust and ecm. What about rods, crank, block etc etc?
Last edited by gsmith9898; 08-06-2009 at 04:56 PM.
08-06-2009, 10:44 PM
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I am sure some one will correct me if I am wrong, but I think in 2001, The 500EFI had Manley rods like the 525EFI. Prior to that they were standard issue forged GM rods. They are still strong, but the 2001+ are hand built vs. a crate 502 short block assembly. The heads and cam are differnt as you noted. They also went to distributorless ignition, closed cooling and long tube headers on the 525EFI . The 500EFI will be eaiser to hop up with open cooling, but the 525EFI is a much better platform in stock form. I have heard them puling in the 540hp range where the 500EFI are in the 505-510hp. Both are good motors, but the 525EFI is a great NA engine.
Last edited by aTX427; 08-06-2009 at 10:47 PM.
08-07-2009, 07:23 AM
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I am sure some one will correct me if I am wrong, but I think in 2001, The 500EFI had Manley rods like the 525EFI. Prior to that they were standard issue forged GM rods. They are still strong, but the 2001+ are hand built vs. a crate 502 short block assembly. The heads and cam are differnt as you noted. They also went to distributorless ignition, closed cooling and long tube headers on the 525EFI . The 500EFI will be eaiser to hop up with open cooling, but the 525EFI is a much better platform in stock form. I have heard them puling in the 540hp range where the 500EFI are in the 505-510hp. Both are good motors, but the 525EFI is a great NA engine.
