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Dmsroxstar

11-10-2014 04:24 PM

Want more hp out if my 502?

I have twin 502 efi 8.2 liter. Looking for semi easy ways to jump up the housepower. I've thought about getting rid of the fuel injection and going to carborated since I've had issues with it. They are stock now. Any thoughts and recomondations?

F-2 Speedy

11-10-2014 04:48 PM

Are they 502 MPI mag motors ? that MPI system will support well over 500hp with larger injectors and custom ECM tune, figure out how much your willing to spend, then double it, bore them to 509's, reuse your crank & rods, good forged pistons, good set of AFR or Brodix heads and custom cams, there's a 100 threads about this.

TooLateVTEC

11-10-2014 06:54 PM

How much power are you looking to make, or what speeds are you seeing now and where do you want to be?

A pretty nice setup would be ProChargers, fuel system upgrade, fuel rail mods to fit better/larger injectors, aftermarket EFI controller like Holley, FAST, MegaSquirt, etc etc

TooLateVTEC

11-10-2014 06:55 PM

Donzi540

11-10-2014 06:57 PM

A pair of ProChargers would be an easy option, and they work well with carbs.
http://procharger.com/marine.shtml

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