Whipple is the way to go. I had a set of Whipple motors in my Hustler and the motors were great!

I would like to see a back to back test, Whipple vs Procharger,
same motor, same dyno, same basic size blowers, no payoffs, no BS, no changing parts, either pump gas or race gas, or both. No excuses.

Tough back to back comparison
 

I think that type of back to back comparison might be like apples and oranges in many ways. They are both great superchargers and their histories show that. They both just produce some of their power and torque at different rpms and there are also differences with time period it takes between the two types of superchargers to make their power. They both provide ways to greatly increase power over N/A engines, they just do it differently.
They both have pluses and some minuses as many products do, but to make a definitive direct comparison might be a bit confusing for some interested boaters unless you really measured a lot of parameters and made a lot of cross comparisons based on usage.
Like I said they are both fruits, they just have different tastes?

Best Regards,
Ray @ Raylar

It may just help the consumer to make an educated decision on which product would work best for their application.

How many boats need more then 1000+ lbs of torque at 3000RPM? That's a serious question. I have never heard a reasonable response to this.

If someone required 20lbs of boost 3000 rpm with a PC it is very easily acomplished through off the shelf components. Most drives don't like a ton of torque so the way the PC ramps in the boost usually works best but, like I said if you want more down low it's no problem. I always assumed PC's produced less heat then the Whipple because it's so easy to run 12-15 lbs boost on pump gas. I guess maybe it's the intercooler sizing.

You have said a few times that your SC is just as efficient as an equally sized PC. What is the rough comparison on models just out of curiosty and do you have a theoretical max hp for each of your units? For comparison, I have made 830hp with an M1, 1260hp with an M3, and I believe Dennis r is around 1450hp with the M4, We should know more about the M5 soon but even the M4 is pushing the limits of pump gas.

For GPM's shootout I agree with Ray. Both engines require different builds to maximize either system. If you want a real battle pick any displacement, pump gas only, and anything else goes. That would be cool.

[QUOTE=HaxbySpeed;3408189

For GPM's shootout I agree with Ray. Both engines require different builds to maximize either system. If you want a real battle pick any displacement, pump gas only, and anything else goes. That would be cool.[/QUOTE]

OK, same cubic inch, same bore and stroke, same rod length, same heads, Actual 92 octane pump gas only. Sure would like to see the results !

[/QUOTE Whipple Charged]
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.

Just curious, if I was running a PC with a waste gate, how would the bottom end torque compare to the Whipple on the same basic engine ?

You still would have trouble comparing below 2000rpm but in mid range you could get similar torque levels. But throttle response would still be far less. The problem is too much boost control on top with a centrifugal drops big power and takes quite a bit of fuel. Furthermore, you can easily do the same with the twin screw, Chief has been doing this for a few years now. 2 years ago, the P1 motors we had made 750hp from 3000-7000rpm with boost control. My personal motors, going in my SV43 has boost control so I can control peak boost.

looks like whipple is on here promoting/defending his product. wheres procharger? this is very interesting to me as i want to get rid of my 256 and make more power.

Dustin (Whipple) is very involved in the boating industry...and is quite active on the forums...performance boating is his passion...and it shows!

I don't think you can say the same for the owners of pro-charger and vortec....and it shows.

Chris