How fast should my 272 run???
 

I have a 1994 Baja 272 equipped with a 330hp merc 454, bravo one drive and 21p mirage prop.

Trimmed significantly with almost no fuel, and by myself on glass water I get the speedo to show 56, handheld gps says 53/54, this is @4600rpm....

I posted in the general section, and Air Time seemed to think this boat was running pretty slow.

I am considering some power upgrades this winter. Is this running slow, or am I right around what it should run.

Thanks in advance!

I had a 260 with a 330 and it would only get about 55. So for a 272 I would say that is pretty close. You seamed to hang pretty good at St.Clair though.

isnt a 260 actually a 26ft boat? The 272 is only a 25ft boat with a 2' integrated platform?

Either way, right about the same speed.

The run was awesome, definitely was catching some good air.... I will be back next year. You coming around for the Raft off or cumberland?

I also would think that speed seems right. Can you turn a 23 prop?

I had a 1997 272 with the 330 LX MPI,,,, turned a 23 Mirage plus at over 60 MPH.

well 4600rpm is not enough, you should be up around 5000rpm, that will be maybe 2 more mph......what kind of power upgrades??? it takes probally 10-15hp to see 1-2mph

i see 62 gps on my 99 252 with the 454 mag mpi that is at 385hp bone stock, my prop has been worked to see 5000rpm have a mirage plus 23p on

IIRC the max rpm on the 330 hp 7.4 was 4600. Speed sounds about right, maybe a couple of mph slow.

The 260 has the integrated swim platform like your 272 does.

I would imagine running in some nice chop instead of glass water would get you up a couple mph as well.

It doesnt really. I run in St. Clair which is usually a 1-2ft chop lake. Some clear days, and some very rough days. But it doesnt matter. 53/54 GPS is the best I have ever seen.

Sounds like you are set up correctly to me. My 24' boat ran 55 with 330 HP & 21pitch at 4700 RPM. If you have not done a tune up, change the cap, rotor, wires, plugs. You can advance your timing from 8 deg at idle to 12. That will give you 36 deg total timing, assuming you have the 24 degree modual. Be sure you have good gas.

The 260 was 26' with the platform. It was also a 21 degree v hull. I was running a 23 pitch overtons prop and would spin about 4800 WOT to get that 55.

Seams like it should be faster but the 330 just dont have the grunt like a mag does. Good motor never had any problems with it ran like a champ. Just not the fastest.

Raft off and Cumberland are hopefuls. We just have to see how things shake out.

Scott my 272 with 502Mag would run 67 on GPS 24p Bravo labbed. Problem with the 454MPI is the internals and peanut port heads. Has good foundation, but needs new internals to build power.

my 454 is carb'd...

51.8 MPH

Using a 15% slip factor which is average for a Baja.

http://www.rbbi.com/folders/prop/propcalc.htm

Would a 23P work on my setup? Or am I propped the best I can be right now? Maybe add a Mirage Plus in place of the standard mirage?

Pros, cons?

Scott see if you can scrounge up a cheap 22p Bravo. I liked the 4 blade for getting out of the hole and to me felt more hooked up in the water. You'll get varied opinions on this, but I think you'll gain a few mph with it. Might have to lab it though.