1997 2150 WT - need more top end speed?

[davef51]

I have a 1997 pre 2150 with the 377 blue scorpion engine, 1:1 velvet drive transmission, and a 3 blade 13X13 prop (original I think). I put an after market tower on it a few years ago and since then it only runs about 41-42 mph at about 4200 RPM. I'd like to get back the 3-4 mph I lost. that engine is rated at 4800 to 5200 RPM and it's never been close. I just tuned it up last summer also.

Thoughts?

thanks,
Dave

[NICKYPOO]

If that’s the original prop, a new one is going to be light years better. The only issue is data for more top end. It doesn’t really exist. Most everyone props down for better low speed performance and sacrifice of top end. I run an ACME 911 on mine (very similar boat). I wanted better low end. At 1000’ it hits the rev limiter real quick. Most of the year I’m over 4000’ and it’ll run almost to the limiter. I think right around 4700rpm right at 36mph on a 350mag. Basically no one reprops for better top end. That being said, it’s not rocket science. I’d contact ACME and see what they say. I imagine you’ll end up with a prop no one runs.

[Ruger761]

My 97 would still run 45-47 with our tower and weight in it (on a smooth day that is). I had the 350 EFI in it with the 13x13 factory prop. Dropped to 42 when I changed to a lower end prop but would launch you. Why are you wanting more speed out of it?

[davef51]

Wake Makers recommends an ACME 13X12 three blade the 515. I'll most likely give that a shot at $367.

Thanks,
Dave

[davef51]

I need more speed because my younger brother bought an Air Nautique 2012 (I think) and I can't touch him at WOT. Just a pissing contest; I can't think of a better reason for speed!

Dave

[chpthril]

Wake Makers recommends an ACME 13X12 three blade the 515. I'll most likely give that a shot at $367.

Thanks,
Dave

Going from a 13 dia x 13 pitch to a 13 dia x 12 pitch is the wrong direction, so poor rec based on your needs. You need to go up on pitch, like to a 15.

[chpthril]

I need more speed because my younger brother bought an Air Nautique 2012 (I think) and I can't touch him at WOT. Just a pissing contest; I can't think of a better reason for speed!

Dave

No offence, but you bought the wrong boat for a race.

[davef51]

mine is paid for, seven years now; his is not for another seven... so at least I have him there!

Thanks guys!

Dave

[TeamAllen]

Welcome to rare 2150 club. I thought I knew every scenario about our model. This one is surprising.
I guess you can always take up barefooting. I would for sure contact ACME on which prop to purchase. They will ask the proper questions to get you dialed in.
Let us know how it goes.

[Ruger761]

I'm kind of shocked the Nautique has that much top end to it, but I guess if you only hitting 41-42 I can see that. Newest Nautique Ive been on was a 2007 but it had been set up for surfing so it didn't have a lot of top end. How much gear or fuel are you running? Loosing weight makes a big difference as well.

[davef51]

ACME said the 515 is the best fit. 13X12 with .08 cup. I had a long talk with one of the sales managers. I'll be going with that.

Thanks,
Dave

[D&P Powell]

Thanks,
Dave

https://www.youtube.com/watch?v=1nxK_hGLTN4

Sorry... couldn't resist.

[TeamAllen]

ACME said the 515 is the best fit. 13X12 with .08 cup. I had a long talk with one of the sales managers. I'll be going with that.

Good to know. Let us know how it goes.

[davef51]

Priceless!!

[NICKYPOO]

Going from a 13 dia x 13 pitch to a 13 dia x 12 pitch is the wrong direction, so poor rec based on your needs. You need to go up on pitch, like to a 15.

I think the goal is to get the rpms up into the max range. The much more aggressive cup should make up for the reduction in pitch. A jump of 800rpm would be huge. I’d certainly like to see the results on where it lands on rpm and mph.