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502 mag or 496 HO

Old 12-09-2003, 01:15 PM
Join Date: Oct 2000
Location: Prospect, Ky
My Boats: 1993 Stryker
Posts: 460

Originally posted by tomcat
IMHO, if you are planning to supercharge DO NOT buy the 496. The pistons are 9:1 cast hypereutectic and will not take the boost. I have heard this directly from Vortech and from Bob Teague. Look at the Procharger kit for this engine; only 3.5 psi, the Whipple kit only 4 psi. Even at this low boost I would question the reliability. Why spend the money for a supercharger kit that can deliver 7-8 psi psi and only be able to use half that? To me that doesn't make sense.

This is a shame since everything else about the new engine is great, but supercharging them is not a bolt-on. Actually, to have such a good engine and then curse it with cast pistons is what doesn't make sense.

If you buy the 502 engines you have lower compression, forged pistons and proven supercharger kits that can make 700-800 HP. Or you can buy the 496, run it until out of warranty, then have Arizona Speed and Marine build it into a naturally aspirated 600 HP with their new package (including forged pistons).
5 PSI (Procharger also offers a 5psi kit for the 496) runs good ,2002 Fastech.
I think the 502 you guys are refering to is the HP 500 which costs more
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Last edited by Dixie Doug; 12-09-2003 at 01:18 PM.
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Old 12-09-2003, 02:43 PM
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I'd choose the 496 HO! It's a more modern and technological engine!
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Old 12-09-2003, 02:43 PM
Join Date: Oct 2002
Location: Louisville Ky
My Boats: Formula 353
Posts: 104

Dixie Doug is correct,
Procharger has a 5 psi kit.
That boat is a 2002 353 fastech. The reason I went with the 496 HO was the price they wanted for HP 500's and XR drives. Figure around $15,000 more per engine. $30,000 more for twins when this boat was ordered. I can buy quite a few Bravo Drives for the price of one XR.
Concidering the HP difference is 45 per engine, it was not worth it to me. I gambled on the idea, that upgrades of some sort would be available to get more HP.
Last winter we installed the 5psi Procharger kits. So far it is working as advertised. No engine or drive problems, after running hard all summer.
The boat originally ran low to mid 70's, and now it is in the mid to high 80's.
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Old 01-04-2004, 03:14 AM
SHAKEN Not Stirred's Avatar
Join Date: Nov 2001
Location: Huntington Beach CA
My Boats: Advantage 27' Victory - Paul Pfaff Whipple Charged 565 @ 850 HP
Posts: 385
Default Whipple 496

I have the first Whipple 496 MAG HO.....

The motor now has 136 Whippled hours on it and still runs great.

The only correct way to supercharge the 496 is to re-program the ECM.........ProCharger can't do that......


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Old 01-05-2004, 02:33 AM
Join Date: Feb 2002
Location: Nanaimo B.C. Canada
My Boats: 2001 Mirage 232
Posts: 51

I was told that the main differences in the 496 and the 496 HO were that the HO has forged pistons & crank and a different cam and ECM?

Is this true??
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Old 01-05-2004, 09:27 AM
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Join Date: Mar 2001
Location: Russell Springs KY
Posts: 47

I ran my "incorrect way" procharged 502 engines about 200 hours boosting 6-7psi with no trouble. Then new rings and bearings and another 100 hrs. They are still going strong.
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