496 HO - Remove Turbulator and Lost Speed?
08-21-2009, 10:27 AM
#22
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If you are boating in salt water or your boat sits in the water a lot DON'T REMOVE THE TURBULATORS! ,the stock steel valve and seats will rust! If you removed turbulators on stock 496's and lost power or speed, something else is wrong. Suggestion- get a fuel pressure guage and read your fuel pressure at speed with the vacume line disconnected at the fuel pressure regulator, if the fuel pressure drops below 40-41 psi under full throttle you have got a fuel delivery issue and that will turn of power quickly and you will loose speed. We have found at Raylar that most guys now with the newer 496's with the newer CoolFuel Merc assemblies forget to service the filters and water disc in the CoolFuel housing and the result can be catistrophic!! Also some boat builders and riggers were installing small size restrictive anti-siphon valves on the fuel tanks and small diameter 3/8" hoose fitting and sometimes crazy fuel line routings and really creating power loss problems for 496's. You turbulators in and out are not your problem, look else where!
Best Regards,
Ray @ Raylar
Best Regards,
Ray @ Raylar
10-13-2009, 03:40 PM
#23
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Has anyone thought of or tried taking the turbulators out and increasing the opening by either drilling or cutting the opening bigger? Then reinstalling them. This in theory should give you a bigger opening and maybe even protection from water getting to the valves. Anyone have thoughts on this?
10-14-2009, 07:26 AM
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For a 8HP gain it's nowhere near worth the risk of moisture issues. It's a great stock engine designed to be a very reliable package, save your money and time and put it away for a blue engine someday. I'd walk away from a great deal on a 496 equipped boat if I seen it at all messed with, including one where aftermarket maifolds or headers were added. Just asking for troubles IMO.
10-14-2009, 11:06 AM
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Last edited by Back4More; 10-14-2009 at 11:08 AM.
10-14-2009, 11:41 AM
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Cost versus Benefit Comparison
I would just like to add that there are littlerly hundreds, at last count about 700plus 496's out there running Raylar 103 kits since 2003 including quite a few Eliminator Daytonas all with great results and great long life reliability. It always amazes me when non 496 owners call out such negative opinions on 496's verus other options. Raylar has done many brand new 496 upgrades for actual boat builders on new Merc 496's such as Sunsation, Eliminator, etc. and there are always fantastic results with big performance increases for very resonable costs versus blue engines. Raylar completed two for a 32 Sunsation that with stock 496's with Raylar 103 kits and STOCK EXHAUST ran 96 miles per hour at LOTO this year whcih by the way is about 1-2 mph faster than the same boat with HP525efi's ran, Go Figure?
If you've got about $45K to $50K for twins to convert your boat to blue racing engines, be my guest, they are very nice engines.
If you've got 496's in your boat and you want the most affordable, non-supercharged, reliable bang for the BUCK! there is no substitute doller for doller than Raylar Upgrades.
Best Regards,
Ray @ Raylar
If you've got about $45K to $50K for twins to convert your boat to blue racing engines, be my guest, they are very nice engines.
If you've got 496's in your boat and you want the most affordable, non-supercharged, reliable bang for the BUCK! there is no substitute doller for doller than Raylar Upgrades.
Best Regards,
Ray @ Raylar
04-27-2010, 05:58 PM
#27
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Has anyone thought of or tried taking the turbulators out and increasing the opening by either drilling or cutting the opening bigger? Then reinstalling them. This in theory should give you a bigger opening and maybe even protection from water getting to the valves. Anyone have thoughts on this?
I read somewhere that you can port the stock manifolds. Seems like a lot of work to me for a few HP, but it is possible.
04-27-2010, 06:01 PM
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Not surprised. Gabe (from the Seattle area) picked up 40 mph on his 25 eliminator going from a stock 496 to one of your motors with the whipple kit. The cost seems up there though.
