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Swimpad Replacement Opinions Wanted

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Old 03-04-2007, 11:55 PM
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Default Swimpad Replacement Opinions Wanted

I have a 1985 Formula 357 SR1 with a couple of supercharged big blocks. I will be getting a break from work soon and plan to get started with some TLC. One thing that I notice on the motors is the small arrestors on the engines. I want to increase the airflow to the motors but the engine hatch/swimpad sits on top of the arrestors (Actually rubbing the paint). It has been raised by the previous owner but there is not enough clearance. I am planning to remove the swimpad and install marine scoops and increase the size of the arrestors. I am unsure of what scoops and which direction I should place them. Why do some boats face them forward and others have the scoops face backwards? Any opinions are greatly appreciated including other suggestions for clearance in the engine compartment.

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Old 03-05-2007, 10:42 AM
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I like the looks of the scoops facing backwards and I think it would also help cut down on some of the engine noise for the peps sitting on the back seat.

I would also like to know why some people mount them backwards. Is it an aerodynamic reason?
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Old 03-05-2007, 10:47 AM
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When I had them on my cat facing forward, the engine hatch would start to rise from the air pressure over 80mph. I had the spring loaded electric engine hatch, but it wouldn't hold it down. There were plenty of vents on the side, but the scoops worked too well!
I've also seen them forward but with holes cut in the back to relieve the presure buuildup.
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Old 03-05-2007, 03:14 PM
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Scoops facing backwards do not ingest water when punching through a large wave. Ever see a race boat drive through another boat's rooster tail? That alone would drown a motor.

Do something real low profile facing backwards. You only need a couple inches and the foam padding on the hatch will hide the bulk of the scoop anyways.
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Old 03-06-2007, 06:35 PM
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Thanks,

I appreciate the input.
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