Re: Whipple Stage II Kit for the 496HO (non supercharged)
 

Going from a simple Whipple re-program kit for $795 for 35 hp, to a $2500 Raylar heads only, not including everything else that goes along with it for 50 hp isn't even comparable... Installing the Raylar kit is flat out a bunch of work. That's a big step-up over re-programming an ecm.

If the Whipple kit actually makes 35 hp and the same torque, what's the point of just Raylar heads alone for only another 15 hp at 4 to 5 times the cost.

Dustin, please step in here... :D

Re: Whipple Stage II Kit for the 496HO (non supercharged)
 

I would be satisfied with 2-3 MPH with twins for $1590 but would be very :mad: unhappy if it was done and seen no gain. Hopefully Dustin or someone from Whipple who surfs this board will step in here and talk about this kit. If not then I guess that would be a good indication of what gains are to be had.

Re: Whipple Stage II Kit for the 496HO (non supercharged)
 

Good point! I remember reading that Arizona had a similar kit and it wasn't positive. The thing that I would have a hard time believing is that a reputable company like Whipple would offer it if it was at the least parcially correct. There has to be someone out there that has tried it from Whipple.

Re: Whipple Stage II Kit for the 496HO (non supercharged)
 

I have a 33OUTLAW and I had the stage 2 done I did see honest 3 mph .Im now running Whipple Sc 7lbs boost 356 hrs had her out last week .Burned up last years fuel.I can tell you one thing Dustin Whipple knows 496s the first 2years out they ran ritch Dustin cleaned that up for Mercury. Dustin spected out my new 800sci 496s should be in boat first week of may

Re: Whipple Stage II Kit for the 496HO (non supercharged)
 

:cool: If there is 1 thing i know it is that whipple is da way to go.(quad rotor sonny heads 550 c.i. big block 1300 horspower) :evilb:

Re: Whipple Stage II Kit for the 496HO (non supercharged)
 

I would have to believe that heads would increase HP and Torque a great deal more than just a simple ecm re-program, and my point also was so that you don't have to run super but can stick w/ 87

Re: Whipple Stage II Kit for the 496HO (non supercharged)
 

I just got off the phone with arizona. They cannot reprogram a 496. He said it has a motorola computer...

Re: Whipple Stage II Kit for the 496HO (non supercharged)
 

So has anyone else done the Stage 2? Considering it myself..

Re: Whipple Stage II Kit for the 496HO (non supercharged)
 

Guys, you have to ask WHERE is this 35 hp increase??? Is it at 3000 rpm? is it at 4000 rpm? If the increase isn't at or around 5000 rpm, don't expect any speed gain. I have the AZS&M kit on my HP500EFI , with the larger throttle body, intake ported to match, and the computer recal, I noticed more snap at mid range, but no speed increase.

These manufactures that claim 35 hp increase, may be referrin to a dyno sheet at 3500 rpm. " Hey look there is an increase here!! Great!" But at 3500 rpm, not top speed increase.

Just FYI.

new to site. Bought a 2004 27’ playcraft xtreme Dec of 2019. It came with a 496ho with Whipple stage 2 needing 91 octane. I have real time data on it but no data on stock 496.
here are the numbers.
496hoBravo3 duel counter rotating props. Inner prop 4blade 22.5 pitch. Outer prop 3blade 22.5 pitch. 103gallons of fuel 6people aboard 58 mph @4900rpms. Planes in 3secs.
half tank 4 aboard 63mph 5250rpms.