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525 MerCruiser

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Old 03-06-2018, 06:09 PM
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Default 525 MerCruiser

How well does this motor take to supercharging? Will it affect the reliability? What types of superchargers would work well with this motor? Thinking about doing this as a winter project.
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Old 03-06-2018, 06:40 PM
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Whipple. A 525 EFI with a Whipple SC is a great package, without breaking the bank.
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Old 03-06-2018, 07:16 PM
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Originally Posted by dykstra
Whipple. A 525 EFI with a Whipple SC is a great package, without breaking the bank.
Was your motor originally the 525 EFI? If so did you have the Whipple SC professionally installed? Also how much MPH did you gain?
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Old 03-06-2018, 07:30 PM
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The whipple 525 kit will make in the 800 hp range.....go to their web site and check it out
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Old 03-06-2018, 08:11 PM
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Whipple’s packaging is just about oem. If you have 525 efi motors and are looking for more speed it’s a no brainer.
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Old 03-06-2018, 09:03 PM
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I agree whipple is thw perfect package,going on 5 years amd running strong
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Old 03-07-2018, 12:20 AM
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7 years and running strong. You can’t tell it’s there. Until you move the sticks...

Make sure you have someone who has done many and knows what they’re doing install it.
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Old 03-07-2018, 07:14 AM
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Originally Posted by Sorceress
Was your motor originally the 525 EFI? If so did you have the Whipple SC professionally installed? Also how much MPH did you gain?
No. My engine is a factory Mercury 525SC. It’s old school carb and not EFI.
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Old 03-07-2018, 07:47 AM
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Originally Posted by dykstra


No. My engine is a factory Mercury 525SC. It’s old school carb and not EFI.
That's a 454 correct ? or started life as a 454
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Old 03-07-2018, 09:04 AM
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For the guys that said 5 and 7 years with the Whipple motor, how many hours? For us 5 years would be about 750 hours or more.

I know of people 5 years would be 100 hours, big range.
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