HP500EFI Mod's
03-04-2002, 06:43 PM
#1
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HP500EFI Mod's
What is everyone's experieince in modifying the 500EFI?
What did you do?
Results: drivability, relaibility, HP gains, fuel requirements, speed gains (please include boat info)
Bill
What did you do?
Results: drivability, relaibility, HP gains, fuel requirements, speed gains (please include boat info)
Bill
Nobody's done anything, I can't believe it.
03-06-2002, 02:35 PM
#4
ASM has a monoplate throttle body and computer reprogram which adds 25HP for about $850. If you tear it down you can send the heads and manifold for porting and add ?25HP to someone like JimV.
03-06-2002, 04:04 PM
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Cobra marty
So will that be the same as a new merc 525??? I noticed a different throttle body on the new 525
25 hp for $850 So $34 per hp, may be good for 1.5mph gain
What is ASM website?? Thanks
So will that be the same as a new merc 525??? I noticed a different throttle body on the new 525
25 hp for $850 So $34 per hp, may be good for 1.5mph gainWhat is ASM website?? Thanks
03-07-2002, 08:11 AM
#8
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I got an email from arizona speed and marine,,, they have a kit to make them a 525,,,,, just consisted of a throttle body and ecm reprogram
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03-07-2002, 06:29 PM
#9
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Boatinbill,
JimV is one of the top marine head porting gurus. He just finished the heads on my 540's and we just dyno tested one last week and it made 699hp @5700rpm and 704 ft# @4800rpm...that's almost unheard of with a single carbed, hydraulic cam, natuarlly aspirated, 9.5 cr in a 540" engine. His head work is top notch. 616-735-0800
JimV is one of the top marine head porting gurus. He just finished the heads on my 540's and we just dyno tested one last week and it made 699hp @5700rpm and 704 ft# @4800rpm...that's almost unheard of with a single carbed, hydraulic cam, natuarlly aspirated, 9.5 cr in a 540" engine. His head work is top notch. 616-735-0800
03-07-2002, 08:59 PM
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