1998 322 + 502 mag's + Procharger = ?

07-18-2003, 12:11 PM

Current setup is a 1998 322 with 502 Mag EFI's 415 hp. The boat goes about 70 mph. How fast do you think it would go if I put Prochargers on them.

Think the hull could handle it? Anybody have a setup like this?

I would like to upgrade, but then you get into $$ with taxes, Insurance & all.

Anyone have experience using Prochargers? or should I be looking at another company?

TIA

CigDaze · 07-18-2003, 12:48 PM

Personally, I would choose Whipple's twin-screw positive displacement superchargers over the prochargers.

You'll get a whole lot more consistant power increases over the entire rpm range. Prochargers lag a bit and don't truly kick-in with boost until later in the upper rpm range.

In any event, with medium boost, you could expect about low-80 with that setup.

Smitty · 07-21-2003, 10:14 PM

Order up some Whipplechargers and I'd be glad to install them if you need to have them done. I did an install on a 26 Powerquest and went from 60 mph to 75 mph (GPS of course) I would think yours should run mid 80's with the 502's

Dave

Saleen367 · 07-22-2003, 10:38 PM

TIA

Have a Procharger on my Saleen Mustang so I can vouch for their power output. But I run 13 lb of boost not 3.5 or 5. The power is absolutely mind boggling.
On a boat however I have no experience there.

But here is my take on ATI vs. Whipple take it for what it's worth ... my own opinion.

ATI Procharger is a belt driven Centrifugal charger meaning it will make its peak HP at its highest usable RPM.
The Roots type Whipple peaks early and flattens out but robs the engine of higher parasitic losses due to design and air charge temp.

In all, I would recommend the ATI because of it delivering the peak HP at an RPM that is needed (top speed) as well as the intercooler it comes with. Higher RRM HP I would bet than the Whipple means higher top speeds.
The Whipple on the other hand creates an abundance of torque/HP at low RPM leaving the door wide open for coupler and gear problems if the operator isn't mindfull of the added stresses. They work great on street cars! Lots of low RPM torque to accelerate heavy objects.
I watched a guy recently in a 29' Magic Powerboats blow his coupler using a Whipple. He was even conscientious of easing out of the hole so as to save his drive unit. Still didn't work.

Either way, I don't doubt you will be happy with your decision. Go to the manufacturers web sites and investigate on your own.
It's a personal decision either way.
Good luck and enjoy.

Smitty · 07-23-2003, 03:04 PM

Here is more info as learned from this site:

Procharger tech assistance is poor at best

Procharger intercooler is made of aluminum which corrodes with time.

Procharger has no power at low end , thus has problems getting on plane with big props.

Whipple makes power at all rpm's

Whipple intercooler is copper/nickel construction=Good

New Whipple setup package is dimensionally the same as the motor thus no interior mods needed.

Whipple tech support is outstanding, plus the owner is a regular on this board

I have original coupler on my boat with 450 hours and I run it HARD. No issues even after 2.5 seasons and 150 hours

Saleen367 · 07-23-2003, 08:09 PM

Quote:

Originally posted by Bigwavz
Here is more info as learned from this site:

Procharger tech assistance is poor at best

Procharger intercooler is made of aluminum which corrodes with time.

Procharger has no power at low end , thus has problems getting on plane with big props.

Whipple makes power at all rpm's

Whipple intercooler is copper/nickel construction=Good

New Whipple setup package is dimensionally the same as the motor thus no interior mods needed.

Whipple tech support is outstanding, plus the owner is a regular on this board

I have original coupler on my boat with 450 hours and I run it HARD. No issues even after 2.5 seasons and 150 hours

I've used their tech line several times with no problem and little wait time.

Procharger's intercooler is made of aluminum which is not only lighter, but dissipates more heat.

My Procharger makes 3.5 lb of boost @ 1800 RPM ... so no low end is relative.

There are no interior mods with the Procharger as well.

I am pleased that the Whipple owner is a regular on the msg board. That makes him/her a true enthusiast. Nothing better. However, it doesn't make for a superior performing product or a reason to chose it.

Like I said before ... take your time. Get informed by reading about each manufacturer 1st. Then make a decision. But let it be your own, not mine or Bigwaves.
It's a big expense as well. Don't take it lightly.

Now, I'm done ... no pi**in match to be had here.

07-23-2003, 08:52 PM

Thanks for all the insight.

My main concern of course is reliabilty, I don't care if it goes real fast if it can't do it for more than a little while.

I don't want to be replacing head gaskets all season.

How about driveability? Idle quality? These all normal?

TIA

Kevin

JaayTeee · 07-23-2003, 09:19 PM

Do you have external steering ?
If not, you'll want to get it.

I have a couple of friends with
after market superchargers on their units,
they work just fine, one guy has 250 hrs.
on his pair of 98' 502's,
He's got this far by realizing that
he can't pin the throttles for extended
periods of time.

You will also need to reprop,
so don't forget to figure that into the
$$$$ equation.

My best guess on this is you will run
in the low 80's, you'll need 30p props.

The idle characteristics aren't any different
from stock.

Good luck.

jt