Modifying Mercury Racing 450R to make more power?
10-14-2022 | 09:56 AM
#1
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Rob
Joined: Aug 2001
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From: Ms
Modifying Mercury Racing 450R to make more power?
Can a Merc 450R outboard be turned up to make more power? Reprogram and turn boost up etc. Like what Whipple and others do to the supercharged Merc inboard motors, 700's 1075's I know it would void warranty & maybe shorten life. But, What you think?
10-14-2022 | 10:03 AM
#2
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From: Worldwide
The problem is the the lower of that motor. Even B1 XR lowers have trouble holding together at 500+ CSHP when being overly beaten on by shock loading.
And Mercury Racing already has issues with propshafts on this motor, which they believe they have solved with the latest batch.
You will see the 600HP V12 outboard is only for big boats that really don't leave the water, shock loading the drive on re-entry.
That's why you see folks just bolting on more 450s instead of them being bumped up in power.
Old hoax:
And Mercury Racing already has issues with propshafts on this motor, which they believe they have solved with the latest batch.
You will see the 600HP V12 outboard is only for big boats that really don't leave the water, shock loading the drive on re-entry.
That's why you see folks just bolting on more 450s instead of them being bumped up in power.
Old hoax:
Last edited by Sydwayz; 10-14-2022 at 10:10 AM.
10-14-2022 | 08:07 PM
#4
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come on someone please old school one of the 450s put some straight pipes and carbs on it for us old schoolers were not all dead yet! stock these motors sound terrible let her sing, there ought to be quite a few salvage ones after the hurricane with salted and fried computers lets have at it! an old school 450 with zoomies for all of us engine geeks that grew up on merc 2.4s 2.5s screaming till they puked ah the good old days!
10-15-2022 | 06:40 AM
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A week or so ago there was some pictures floating around of an inline 6 verado with a Motec ecu. I think that is the most realistic / best chance of a solution to add power to the 450. As noted the lower is the weak link and mother mercury has put an end to ecu reflashing. The stand alone motec ecu would provide a lot of options and I would think another 50 hp could be gained just in tuning and setting them up for 93 octane only.
10-15-2022 | 12:06 PM
#7
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From: Traverse City, Michigan
come on someone please old school one of the 450s put some straight pipes and carbs on it for us old schoolers were not all dead yet! stock these motors sound terrible let her sing, there ought to be quite a few salvage ones after the hurricane with salted and fried computers lets have at it! an old school 450 with zoomies for all of us engine geeks that grew up on merc 2.4s 2.5s screaming till they puked ah the good old days!
10-15-2022 | 12:47 PM
#8
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From: St. Pete Beach, FL
A week or so ago there was some pictures floating around of an inline 6 verado with a Motec ecu. I think that is the most realistic / best chance of a solution to add power to the 450. As noted the lower is the weak link and mother mercury has put an end to ecu reflashing. The stand alone motec ecu would provide a lot of options and I would think another 50 hp could be gained just in tuning and setting them up for 93 octane only.
An e85 tune up with a tiny pulley would be sick
10-18-2022 | 08:54 PM
#10
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From: Lake Michigan to LOTO
Looks like the Aussies found the master key for the lock Mother Merc and the EPA tried to apply.
