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496 MAG HO Whipple/ProCharger ?

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Old 07-26-2002, 05:38 PM
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Yep, after their second year of production it pretty much comes down to cam and programming.
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Old 07-26-2002, 05:55 PM
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BD,

I couldn't tell from your post but are the specs
you posted for the 2003 model year? You mentioned that this model year and last they had 496=Cast and 496HO=forged cranks. Were you referring to the 2001 and 2002 model years? I am very close to closing on an early 2002 boat with a 496HO and want to make sure which crank it has. Thanks.
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Old 07-26-2002, 07:23 PM
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The HO version has always had the forged and is good to go on the procharger...
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Old 07-28-2002, 11:41 AM
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While we are on the subject of the 496 HO ....What has been your expierience with break in on these motors. I am told they are set up by Merc to run way rich during break in ( 20-30 ) hrs and then the computer automaticly leans them out. We are getting a large amount of black soot on the transom and under the swim platform. I understand this happens on most of these but not all. What have you guys heard or seen? Thanks again for all of your replies.
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Old 07-28-2002, 12:25 PM
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Paul...it'll clean up after 15 hours or so. I still get soot after 90 hours. It's not bad though. I hear Whipple is coming up with a reprogrammed chip that will lean it out a bit, along with some other mods.
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Old 07-28-2002, 12:50 PM
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Indy,
Thanks for the input.

I also cannot get a straight answer on the rev limiter. Are they computer stepped against # of hrs run? It seem that up to 10 hrs or so the motors only top out at 4500 to 4600 RPM. They are factory set if I am not mistaken to 5150 RPM. Does the computer raise the limit automaticly after a predetermined number of running hours?
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Old 07-28-2002, 01:59 PM
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Paul...How did the run go?? We were in Montauk and the seas seemed calm, it was a little cloudy out but seemed a good day for a run.
I don't know about the rev limiter during initial break-in. I never ran mine up until I had 15+ hours on it. Steve Fisher
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Old 07-28-2002, 02:16 PM
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The run went very well. Water conditions were near perfect but the cloud cover and threat of rain hounded us all day. We received a number of e-mails from people who woke up looked outside and went back to bed. The post grill party was great. Fantastic food and lots of laughs. Later in the day a bunch of boats shot over to the Hamptons to hang out and party till early evening. Our next event will be to Essex Island Marina on the CT River. I expect you to run with us for that one! If anyone is interested in registering for that you can contact us at [email protected]. You can visit our website later this week to see some pics from Saturdays run. LIOPA.com Click on the SHelter Island Run Page.

Paul
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Old 07-28-2002, 02:17 PM
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Quote:
Originally posted by ccarloss
BD,

I couldn't tell from your post but are the specs
you posted for the 2003 model year? You mentioned that this model year and last they had 496=Cast and 496HO=forged cranks. Were you referring to the 2001 and 2002 model years? I am very close to closing on an early 2002 boat with a 496HO and want to make sure which crank it has. Thanks.
ccarloss,

I'm afraid I don't have the answer to that...All I know is that some time ago when I would look up the specs, the cranks were different(cast=496 and forged 496HO). Obviously, that is not the case anymore...But it was a very recent change. Chances are that the changes may not have even hit the market yet.
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Old 07-28-2002, 02:20 PM
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Quote:
Originally posted by LIOPA
Indy,
Thanks for the input.

I also cannot get a straight answer on the rev limiter. Are they computer stepped against # of hrs run? It seem that up to 10 hrs or so the motors only top out at 4500 to 4600 RPM. They are factory set if I am not mistaken to 5150 RPM. Does the computer raise the limit automaticly after a predetermined number of running hours?
The rev limiter should be a constant 5150 regardless of hours, however, for the first 10 or 20 hours, I forget which, the motor runs rich during break-in, thus not developing full potential until after break-in.
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