Originally Posted by Raylar

Harper220 & Hydrocruiser:
Thought I would drop in the thread here and try to clear the air and line out some more 496 facts and insights. First the 496 engine in 496HO early versions came with a 1038 micro-alloy forged crank that was forged by a GM subcontractor. The 1038micro-alloy in forged is stronger than a conventional cast nodular iron crank. GM provided this crank in the marine engines in 2001 and erly 2002 versions because it was the only crank they tested up to that time that would provide enough safe stength for the 425HP loads.
(continued posting#2)
Ray @ Raylar

Originally Posted by Harper220

No, I did not. After reading Raylar's info, there's a little more to gaining a true 40 hp. I need the extra power through out all rpm's not just on top. This is off the subject, but I've really been following the hydromotive p5x's and their gains in the mid-range cruise. I'm looking for mid-range gains, since that's where I'm at most of the time. They claim 5-7 mph with just a prop change and couple that with 40-50 more hp per motor, I would be satisfied. Right now I'm at 59-60 mph @ 3400 rpm stock 30p bravo's.

Originally Posted by Harper220

Anybody tried out Whipple's Stage 2 kit yet? I'm just looking to wake up my 496 HO's a bit, so I can jump from stock 30 bravo's to 32 bravo labs on my 28 daytona. I'm mainly looking to increase mid-range cruise speeds between 3000-4000 rpm. Whipple claims 8-10% increase which amounts to 34-42 hp. I believe this system sells for $795 and I believe they did away with the k&N flame arrestor to keep it at this price. Any input? Waste of time or worth the money?

Stage 2 $995
The Whipple stage 2 maximizes the power output of the stock engine by running 91 octane or better, increasing the maximum spark advance, increased ignition power from the individual coils, denser air charge from the low temp thermostat, maximized air-fuel ratio in each individual cylinder and increased air flow from the hi-flow filter. Calibration increases torque levels throughout the entire rpm curve while making more peak hp for increased speeds.
Key features:
• Hi-performance ECM calibration
• Low-temp thermostat
• Hi-flow K&N filter
• 5450 RPM limit
• 8% - 10% power increase over stock
• Increased plaining ability with increased torque output

Originally Posted by Chuck

Hey Harper, I just sold my boat and have a pair of p5x29's with about 15 hours on them. let me know if you have any interest. They work great for the midrange!!!

Originally Posted by Steet

Harper, I believe if you go from a 30 stock to a 32lab you can do that now as the rpm will be the same. They are basically the same prop far as rpm. You should however gain speed

Originally Posted by Harper220

I don't know if the 29's would be the right pitch? I can't get more than 4900 rpm with the stock 30 bravo's without overtrimming and losing speed. I've heard that a 30 bravo is = to 28.5 hydro, a pitch and a half difference. I guess you don't know till ya try.

What are you asking for them and what boat did you run them on?