Hey Doc, you are correct. To me it is cheap hp, K&N filter is about $85 dollars. Be sure to get the Coast Guard approved version.

After all the $$ spent chasing HP, you can't beat the extra revs for that little of money.

Hyper.......pipe down.

I don't know if anyone has received the new Extreme Boat magazine yet. Just got mine a couple of days ago and there are some really good real world projects in there.

One guy took his 32 Sunsation to over 100 MPH at a pretty great expense, and another guy took his triple engine 40 Outlaw to over 100 MPH for only $50,000 total in engine work. That was a 25 MPH improvement! Awesome.

There is also an EXTREME 50 foot Nor-Tech cat running over 160 MPH burning 600 gallons per hour. Now I call that extreme.

The point here is the guy with the Sunsation gained 4 MPH by having the hull blueprinted. That is impressive, and has changed my thoughts about having it done.

If you haven't seen this magazine, get one, it is the best one out there for boating in my opinion.

Doc.....just remember the famous..."10mph rule"....

First off, we have spent hundreds of hours of working on the boat to pull all of the mph we can out of it. It would be impossible to list many of the changes and tuning finds that we have made over the years, but in terms of "purchasable speed"...

We went with Imco 2" Extreme lowers and picked up a lot of mph and increased stability as well. It is no secret that Baja's have a low X dimension and the Imco drives are probably the most economical way to increase the X (it is also non-permanent).

The bullets on the lowers also made a big difference in temperature and water flow.

We are in the process of trying some things with exhaust based on what we learned redoing the pipes for the center motor.

Finally - props. You just can not argue with true Merc lab finished props, especially when you have the ability to tune them to your exact boat. When the boat was delivered it had 26's - we now keep two sets (a summer set and a winter set) - one are 30's plus a bit, the other are 32's less a bit. Both keep us right at the RPM's we want based upon the seasonal temperature (air and water).

Just my two bits.

By the way - 40 Outlaw, triple HP500EFi's

1995 Baja 24 Outlaw 454 Magnum Carbed

Stock 60 mph GPS with 4 Blade

Whipplecharger added at 6 PSI boost and labbed prop took speed to 75 mph.

This year a roller cam is going in along with 8 lbs boost.
Hoping to hit 80 mph with cam and higher rev limit.

I'll post my results sometime in June when it is all dialed in.

Here is a test I wana go over as soon I get my boat on the water :

Fact : For each 10 degres F. drop, expect a 1% engine power increase.

All of our Mercs pumps the air in a vented enclosure. Vented??? Mmmmm

First, I will place a temperature sensor on the flame arrestor.

I am pretty shure that I will see something like 30-40 degres difference with the outside temperature…

30-40 = 3-4% less power is’nt?

If so, I will go for a duct system that would get the air in the side panels.

30-40 = 3-4 % ! So considering I got a 7.4 MPI, yes only a 7.4 MPI witch is rated 310 HP.

310 x 1.04 = 322.4

12.4 HP for let’s say… ?? less then 50$ in PVC tubes and fittings?

It may sound like a poor increase but it may be sufficient to increase prop pitch, cupping….

Now imagine what it could do for a 425 – 500 hp rated engine?

What do you guys think about that? Gimme your 2 cents… The only question is : Would it be legal regarding Coast guard rules?

Yes, it is legal.... All I ever remember about engine restrictions is that the motor must have a backfire flame arrestor. Be sure to test before and after in the same temp/humidity/altitude, etc. You might want to look at insulating that piping...It will get pretty warm after a while of cruising...

Tommy