Average WOT RPMs on Response LXI with Monsoon

[TTUWATERSKI]

I wanted to get a few other peoples WOT RPMs to cross reference with my reading.

I ran 42 MPH at 4680 RPMs with the stock ACME 515 13X12.

[edwin]

My 05 RLXi / Monsoon will spin the stock ACME 13x12 5025rpms, OJ XMP 13x12 5050rpms, OJ XMP 13x11.5 with lots of cup will spin appx 4850 rpms...once it gets in the 90's and humid, take apprx 100-150 rpms off that.

[VinRLX]

TT, what's your location/altitude? And has the prop been damaged? Your RPM are low (as is your speed if it's accurate).

[Molarbu]

My 23 XTI is about the same rpms with the same prop and it's probably 1000 lbs heavier. I'd expect a little better performance. I'm at 700 feet though so the elevation isn't much of a factor. My wot was also at 4800 and was 43 mph.

[Deke]

I wanted to get a few other peoples WOT RPMs to cross reference with my reading.

I ran 42 MPH at 4680 RPMs with the stock ACME 515 13X12.

I get 4800/42 at 6900' in RLx with Monsoon. Prop is ACME 525

[Cougar1]

I wanted to get a few other peoples WOT RPMs to cross reference with my reading.

I ran 42 MPH at 4680 RPMs with the stock ACME 515 13X12.

I am going through the same thing as you...

4500rpm at 45-47 mph.

I tried the OJ XMP 324 13x11 .080 cup and I only gained 200-250rpm (approx 4700-4750). OJ sent me a new one and I am going to try it out Thursday, but we only had a lower cup and don't have high hopes. I can't tell the different between the Acme 515 and the OJ 324.

Acme wants me to try a 911. 13x10.5 .060 cup. Too bad the group buy is over, but I found two websites that sell them in the lower 300's so it is fairly close.

[electricjohn]

5000 rpm, speedo shows 50mph but has never been checked. Acme 515, 13x12.

[TTUWATERSKI]

I am uneducated on the effect of altitude on my readings. Lubbock is 3,255.9 ft. Acme has suggested I try a 911 - 13 L 10.5 three blade

nibral 1 1/8" bore .060 cup. Should add 500 RPMs at WOT.

[VinRLX]

Altitude robs horsepower (as does high temperature and humidity) due to less air desity. Long story short, many people 'prop down' at higher elevations. Looks like ACME has already advised you to try just that.

However, it may help to know more about your boat:

What year?

Are you the original owner?

Are these the same RPM it was turning last season?

Have you added anything (tower, etc)?

What's the condition of the air filter, fuel filter, spark plugs, fuel supply, etc?

[skisix@38]

'03 RLXi monsoon, 4900' altitude: I turn 42.1mph at 4620rpm. ACME 515

At 911' altitude I turn 4850 and I go 45mph with a big bimini on the boat.

[TTUWATERSKI]

Here are the details on the boat we are running:

2007 Response LXI

Monsoon 340 with ETX CAT

ACME 515 Prop

We are the origianl owners and the boat just got its 100 hour service before I took these readings.

Extra Equipment:

Titan Tower

Power Wedge

Before this boat we had an 05 RLXI that would turn 4800 at 48 mph with the 515

It had the same equipment except a manual wedge instead of a power

My Acme 911 is on the way so I will post my results and impression of the new prop.

[BlastRlxi]

Just a hair over 5000 rpms at 47 mph (gps).

[Green_Giant]

OJ 13x12 #334, 5125 rpm @ 46.5mph w/3 on board, no tower, sea level, using the perfect pass readings, my stock tach seems to run about 500rpm shy for some reason.

[eyepeeler]

Bringing up an old thread. Like to see what the RLXs are running WOT as well.

I'm running a 2001 RLX with Monsoon.

4800/47.5 at 600 altitude with 515 13x12

[eyepeeler]

[areamike]

Bringing up an old thread. Like to see what the RLXs are running WOT as well.

I'm running a 2001 RLX with Monsoon.

4800/47.5 at 600 altitude with 515 13x12

Mine does the following with an Acme 449 13x12.625. Hammerhead 365(rebuilt) with SSP. Not sure what my speeds and RPM is without the SSP.

3200@34MPH

4200@40MPH

[email protected] (WOT)

[eyepeeler]

Mine does the following with an Acme 449 13x12.625. Hammerhead 365(rebuilt) with SSP. Not sure what my speeds and RPM is without the SSP.

3200@34MPH

4200@40MPH

[email protected] (WOT)

Man, that is a rocketship!

[eyepeeler]

[Jpeezy]

Was this ever resolved? I have a 2003 response lxi with the monsoon 335 motor. Last night on glassy water I was only getting 2750 rpm @ 39mph. Acme 537 prop. Fresh service at the beginning of the summer including all filters.