Hp500efi rebuild
#1
Hp500efi rebuild
I recently bought a hp500efi and looking to build a 650 hp 540ci out of it. I'm curious what other guys are running. Retuning the efi system, carb, or installing aftermarket efi system such as holley. As always I appreciate all the help I can get.
#3
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These 540's made 630hp, thats all the intake will support
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articfriends (07-09-2020)
#4
#5
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This can be done for 13K, looks like more power available with added services.
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#7
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a 525 style flame arrestor with a monoblade tb properly tuned will help a built 500 gain about 15 to 20 hp on top and more peak torque. The FA's are super expensive at 765$ each though. You CAN buy the 525 throttle blades for 50$ to bore out IF you know a competent machinist . hardin or somone sells a 525 fa for 600$
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#10
I honestly thought someone would have suggested selling the HP 500 and just buying a 540 as opposed to conversion.
A lot less work and prob cost less in the long run too.
https://www.ebay.com/itm/MerCruiser-...QAAOSwjL5ZFdX3
https://www.ebay.com/itm/540-Bulldog...IAAOSwnK9ZVqxK
https://cleveland.craigslist.org/bpd...145891904.html
Just curious, what did you buy the 500 HP for? I've got a 502 MAG (black engine) that I would ultimately like to upgrade and a 500 HP EFI would be what I'd want or replicate for reliability.
A lot less work and prob cost less in the long run too.
https://www.ebay.com/itm/MerCruiser-...QAAOSwjL5ZFdX3
https://www.ebay.com/itm/540-Bulldog...IAAOSwnK9ZVqxK
https://cleveland.craigslist.org/bpd...145891904.html
Just curious, what did you buy the 500 HP for? I've got a 502 MAG (black engine) that I would ultimately like to upgrade and a 500 HP EFI would be what I'd want or replicate for reliability.