500 EFI's
#11
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There are always pros and cons to any project but it all comes down to budget vs your goals. If your looking to just bolt on power, superchargers are the best way. However, if you are willing to pull the engines tare them down and have them completely rebuilt, internal mods are the best way because you can tweak those 500s to push over 600hp. If you do decide to do any internal work, I know a buddy that owns a shop in Cleveland. Gellner Engineering was recognized as a "top notch" engine builder in Powerboat magazine and has been well known in the boating and auto racing world. Call Dean at 216-398-8500 tell him PK told you to call. He can also give you more information about getting more power out of those 500s. He tweaked my 454 from 385hp over to 550hp N/A!!!
#13
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Join Date: Apr 2003
Location: Punta Gorda
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Ill trade ya for them 500 efis. if thay have low hrs. 540 ci 950 hp.420 mega blowers with chillers bowtie blocks all good stuff. to much for a 30 ft boat. I took in on trade looking for some 500 efis. I was going to detune them if I didnt trade them off.
#14
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Your hooked !!
#15
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Join Date: Oct 2003
Location: Pacific / Havasu
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http://www.offshoreonly.com/forums/a...1&d=1190416649
engine shot of my ol' 1996 Gun
Still running great for it's current owner.
engine shot of my ol' 1996 Gun
Still running great for it's current owner.
#17
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Join Date: Jul 2006
Location: Ft. Lauderdale Florida & Tarpon Springs Florida
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#20
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Location: Oakland N.J.
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I whippled my 500,s and I'am very happy with the power and durability. But you will have to go to bigger props or taller gearing to see the gains you want for the money. Expect to have some drive failures.