GPM

You can always plug an after market ECU into your system. The new Fast 2.0 has a self tuning mode, not that hard to set up. We've run them on boats for 14 years now.

UrbanDisturbance

My heads are iron heads that came with the 600 hawk motors. I had them worked on. I assume I will have to change a lot on my engines. I need to get my spec sheet on the details of my motors and post them. Maybe someone with some knowledge can help me get some major HP. After I posted this, I did not realize I could get 1000hp if I wanted. I am going to put Arneson ASD7Ms on the boat. After it is installed, my next step is to update then engine. I may want more than 850hp. I don't know my options.

GPM

You might want to contact some engine builders if you haven't already done so.

UrbanDisturbance

I am in the process. My engine builder told me he likes Vortec over Procharger. I don't know why. Also, he stated that the prochager intercoolers use to rust in salt water because it was made of aluminum. Prochager may have changed that by now and he was not sure. He said the Whipple Quad Intercooler is made out of something else and does not rust. No matter if I go with Whipple, Procharger, or Vortec....I have to make sure that it fits under the engine hatch. If anyone has a 502 block bored to something else and is making between 850-1100hp on super unleaded, it would be nice to know the entire setup, assuming it is low profile.

Raylar

Obviously there are a lot of good marine performance engine builders who can put this type of package together for you, so its probably going to be more important which one can build or help with the on the dyno and in the boat actual fuel mapping and programming that will be needed to get your final Whipple, Pro Charger, Vortec supercharged engine set up correctly so that it will provide some good lomg hours of reliable trouble free usage and not just big numbers off a dyno or in specs and "dock racing"
A couple who come to mind here on OSO with good history and results in this type of build , Mark @ Precsion Marine, Bob @ Full Throttle, Eddie @ Young, Mark @ Mer, Dustin @ Whipple, Alex @ Boostpower,etc.
My suggestion is to go with someone who can do more than just build the package, but someone who can get it totally dialed in on the water for your hard earned dollars and piece of mind!

Old chinese Proverb say: "IF IT WAS EASY, ANYBODY COULD DO IT!


Best Regards,
Ray @ Raylar

JRider

Well...a whipple 3.3 FI setup is pretty damn low and you cant beat it as far as looks/packaging. Will it support 1100hp?? I dont know...but whipple has 4 and 5 liter that most likely will. I personally dont care for bracketry and side mount of a procharger in a boat. I have spoken personally with lightningjet...he could not keep a belt on his setup after many attempts/mods. Not to say he couldnt have gotten it to work but how long do you want to fight it?

Whipple Charged

I only brought up the big SC's because another person brought up the F4 or whatever. We can make just as much power as the Procharger, this is not opinion, this is fact. Its pretty simple, all our SC's are tested on supercharger testers which measure power consumption, temps, etc. Many others do this as well so when talking of just the SC, there really is no guess, we know what it can and can't do and what others can and can't do.

As I said before, it comes to the package. If you can put a 300lb intercooler in the passenger seat and duct the air, you can run 30psi and keep control of the temps, but we can't put that under the SC so we can't compete in that market. So each has its own market and abilities.

To even remotely compare torque curves is really poor judgement. I know you know the fundamental differences of a positive displacement SC vs. a centrifugal. Its is theoratically impossible for a centrifugal to pump as much air at low rpms unless a wastegate or boost control valve is used and the SC is spun at a much higher rate. Its just not possible. Can they make good torque? Well thats up to the user and what there happy with, in most cases, yes they would make good torque. But, is it close to what a twin screw setup does? Not even remotely close.

GPM

You might be better off turning your 502s into 540s, with good flowing aluminum heads, cam and exhaust, and either one of the superchargers mentioned, you should reach your HP goal. What RPM range do you want to make the most power ? If your engine compartment is tight can you get enough air into it to feed the motors ? Will the hull handle the HP and speed increase or just become extremely dangerous.

Jeff P31

As mentioned most boat's have trouble getting enough air in the engine conpartment to run stock power . I'm running pro chargers on hp 500's with a cam change and headers and making 750 hp at 7 lb. boost . Works great and no problems at all . Building a pair of 598's which I plan on using 5 litre whipples , just waiting for Dustin to put them on sale

Strip Poker 388

I am real happy with my 500efi Whipple kits.Good power and lots of TQ even with my semi stock motors,Its a simple kit you can do yourself.With the mefi 4 computer there are known maps for a lot of combinations, My basic map was right on and didnt need any on the water tuneing.I would do it again!!

Rob



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