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Old 09-28-2007, 03:10 PM
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More specific: A roots type (or screw type) has two interlocking screws that force the air charge into the engine and is mounted directly on top of the engine. A centrifugal type is mounted off to the side (like your alternator) and has a fan assembly inside that blows the air charge through some air ducting into the engine. Both types are driven by a belt off the crank.
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Old 09-28-2007, 03:17 PM
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Roots type:
Merc 500's.....-roots.jpg

Centrifugal type:
Merc 500's.....-super-charger-12.jpg

Last edited by MacGyver; 09-28-2007 at 03:19 PM.
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Old 09-28-2007, 04:07 PM
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Whipple's are a bit different than a roots type. Here is some good info.
http://www.whipplesuperchargers.com/....asp?PageID=79
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Old 09-28-2007, 08:20 PM
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Nice....I guess now is where I ask how much should I expect to pay per motor to get a Whipple charger screaming?
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Old 09-28-2007, 11:01 PM
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About $8500 a motor + or - depending on your fuel system.....but it is hands down the best system and it will fit inside your hatch without mods most likely.
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Old 10-01-2007, 11:58 PM
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Originally Posted by CAPTCHUCKV
Of all the different things to do to an engine to get more hp, what is the single best way to go? I only want to do one thing right now so what should it be for overall gains? Supercharger, Blower, Headers, etc. ???

500's should already have headers or at least Gil exhaust?????

BTW, did you get a new boat????????

If you go with blowers, you better make sure the person who sets them up knows his chit or all you're gonna have is some 20k worth of anchors. Also, you better have a boat with hyd sterring and some good drives to handle the power.
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Old 10-02-2007, 06:34 AM
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There is a used Whipple on E-bay right now off of an hp500 carb engine. Just FYI.
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Old 10-02-2007, 06:43 AM
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I can tell you from experience (automobile) that the Whipple makes more boost at a lower RPM than a B&M!
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Old 10-04-2007, 01:34 AM
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What brand of aftermarket springs is a good bet to put on these motors? Also what is the size of tthe springs?

To answer your question Griff...no I din't get a new one yet...I am looking at a few different ones right now and I am trying to see what is the best one for the money.

I'll keep you posted....
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Old 10-04-2007, 03:52 AM
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Get the best boat then worry about going faster after you get used to it. You better check into insurance in LA. It could be difficult to get from what I have read.
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