Are the heads or intake different between the 2 or is it just the cam?
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10-13-2009 12:06 PM
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10-13-2009 12:23 PM
Cam and ECU that's it. Oh and a couple stickers.
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10-13-2009 12:25 PMI think that it's 50 HP
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10-13-2009 01:13 PM
Can the ecu be reprogrammed or do you have to buy an HO ecu?
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10-13-2009 10:23 PM
Raylar can reprogram the ECU's. I asked them about this a few years ago. Decided not to do it because of limited Prop selection ( duoprops ) anyway, They told me a cam swap and ECU reprogram would turn my MAG's into HO's . I think it was 700 bucks per ECU. Not sure what the cam cost is.
2005 Formula 330ss
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10-13-2009 11:59 PMI think the heads are ported more also ,,,,bigger runners ????
thats why they call it HO = HIGH OUTPUT !!!!!!!!!!
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10-14-2009 09:37 AM
496 is 13,999.99 and Ho is 15,299.99 on ebay from the same company. That works out to be about right. My marina told me an HO ECU is 1200.00 and cam is about 300.00. Sounds about right.
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10-14-2009 10:16 AMYeah,,but if u can get the ECU remapped,,and change the cam your looking at +500 ??!! i guess, plus u can sell the standard cam . NO ??
The cam ,,,300 ,,no matter which one ??!! so thats a no brainer ,,,toooooooooo much money for the HO ,,same with the ECU,,its on the standard one aswell ??!!
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10-14-2009 11:18 AM
You can send you computer to Whipple and get their stage 2 ecu programming for around the same price and have a little more hp than the HO programming.
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10-14-2009 12:58 PMContrary to some beliefs, reprogramming a stock 496 other than raising the rpm rev-limiter will not have any noticible (speed of boat) change in power for the engine. If you are changing the valve train stability and quality of the 496 such as with our new aluminum heads you can safely raise the rev-limit of the engine to about 5400 rpms and gain boat speed with proper propping if your hull will use the increased efficiencies.
The only things that really raise power in a stock 496 are upgrades to the engine such as our kits or exhaust header or header manifold kits and supercharging which Raylar does not recommend on stock block 496's.
How do we know this, our years of dyno testing and in boat testing prove it over and over. Take my advise and save your hard earned dollars until you can make effective upgrades!
Best Regards,
Ray @ Raylar
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10-14-2009 01:22 PM502 all the way. It's only 10 horse less in stock trim, but you're getting all forged internals and endless upgrade possibilities. This marks the last year of 496 production/availability, so I wouldn't invest in anything 496-related right now. Next will we will see the return of a new Merc 502 variant so that's where I'd be leaning.
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