Getting more power out of GT40 | 1998 Super Sport Nautique

[Jousicastillo]

Hi Guys,

I am riding (Wakeboard) an absolutely slammed 1998 210 (Super Sport), with about 4200 lbs in ballast ( displacing a total of about 8000 lbs, hull weight included).

Engine is working quite hard, so I was wondering what upgrades or preventive measures could be taken, to avoid either block, cylinder, valve breakage, without having
to sacrifice weight ballast (wake is absolutely amazing at 23.9mph and a 77.5 feet rope).

I am doing oil changes every 50 hours (Valvoline Racing VR1), trans every 100 hrs (Dexron/Mercon III) and V drive oil every 500 hrs (non detergent 30W straight).

Engine has around 1000 hours.

Thanks!!

[Dgee]

What prop are you currently running? Best bang for the buck would be an upgraded prop.

[Tryathlete]

What prop are you currently running? Best bang for the buck would be an upgraded prop.

Agree on finding the right prop. Call Acme and see what will get you a good match of rpm and your 23.9 mph. I’m not sure but I’m guessing you should aim for under 4500 rpm (I’d think 4000) would be a reasonable goal.


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[Jousicastillo]

I am running an Acme 1578 prop. Running a bit under 4000 rpm with the aforementioned weight

[Infinity]

Your probably ok then, at least in my manual, it says to avoid running for extended periods over 4000rpm. Still, a more hardcore prop could bring down rpm's which would save you some gas and wear on engine. ACME can tell you.....and from what I have found, Nettles Props in TX have the best prices

[TRIP]

I just want to see that wake! Any pics or better video?!

[Jousicastillo]

I just want to see that wake! Any pics or better video?!

Here you go

[Jousicastillo]

Your probably ok then, at least in my manual, it says to avoid running for extended periods over 4000rpm. Still, a more hardcore prop could bring down rpm's which would save you some gas and wear on engine. ACME can tell you.....and from what I have found, Nettles Props in TX have the best prices

great info! thanks!!

[funkster]

Wake looks awesome and nice riding. I would like to here where you have your weight. I have the same boat 98' SS and I'm running 910's in the rear lockers(about 3/4 full w/ wakeboarding) and a 580 in the ski locker and about 300 of sand under the bow seats for a estimated 2,500lbs. She takes forever to get on plane. How long does it take you to get on plane with the Acme 1578?


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[Jousicastillo]

Wake looks awesome and nice riding. I would like to here where you have your weight. I have the same boat 98' SS and I'm running 910's in the rear lockers(about 3/4 full w/ wakeboarding) and a 580 in the ski locker and about 300 of sand under the bow seats for a estimated 2,500lbs. She takes forever to get on plane. How long does it take you to get on plane with the Acme 1578?


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On a old gen 210 nautique, weight placing acts as follows:

back: makes wake peakier and vert
middle: makes wake bigger and meatier
front: gives wake some transition and helps maintain wake shape at lower speeds

Taking that into account, the setup I use is the following:

two 700lbs bags in the back (1400lbs) - 34% of total weight
one 580lbs bag in the ski locker and a 1100lbs bag on top of it - 42% of total weight
one triangle of 1000lbs in the bow - 24% of total weight

Also, i usually I have one or two people in the boat (driver included).

speed is 23.9 mph and rope 77.5 feet.

wake cleans nicely, transition is comfortable and the wake has a very manageable kick to it.
boat also planes in about 15-20 seconds or so. Needless to say, one should be carefull when
stopping ( I use the factory bow cover just in case).

having recently wakeboarded on a 2018 Centurion Ri237, I would say this setup is a smaller
version of that wake, with less transition.

Finally, based on what you wrote, i think you are missing some middle and bow weight!

[Infinity]

Very nice riding!

[Jousicastillo]

Very nice riding!

thank you!