Start to Finish: Building Our 50' Skater
02-15-2023, 01:28 PM
#1891
Registered
IMO: The chosen engine builder "s" since start of this project, both well known in the light duty truck diesel performance world, each gravely under estimated the requirements at hand. First one bailed out quickly with no clear plan for an actual marine diesel platform. The second one failed to heed my advice not to take on the job, while checking out one of my yet untested engines at a diesel truck event. Stated "wasn't a big deal, cause he builds 2000+ hp diesels every day..." I attempt to explain he was out of his league for what is expected. While he just chuckled and walked off. Tyson destroyed his first two attempts in mere minutes of runtime as we know. And a couple attempts later, he's gone too. Cocky is wrong attitude to start with in this type of endeavour. Respect, and begging for bones from those who hold the records, ie FB and a couple others old timers, is how I chose to approach the task.
Who was the second or first? LOL
They were the ones I remember, then he had Stock Cummins I think?
Did he try a 2nd "hot rod" diesel builder?
Been so long, and way to long of a thread.
02-15-2023, 01:37 PM
#1892
Registered
Main point stressed to me by the legendary diesel racers, shaft speed vs prop diameter. Which ultimately equates to final slip on cleavers. Tyson and I are both stuck at 1.15:1 final drive ratio and 18" diameter unless we chop off the cav plates. You however can overcome both of those limit very easily.
engine min 600, max 2500rpm
1. gear 3.43:1
2. gear 2.01:1
3. gear 1.42:1
4. gear 1.1
or
after transmission is splitbox 0.555 overdrive so shaft speeds are
1. 314-1312rpm
2. 537-2241rpm
3. 760-3170rpm
4. 1080-4500rpm
If you compare to bbc performance engine, 1000rpm idle, 6000rpm max and 1.5:1 drive ratio, shaft speeds are 666rpm-4000rpm .
1.35:1 ratio give 740rpm-4444rpm
My prop speeds overlap nicely in differrent gears, idle speed is slow enough to no wake zones and max rpm is same that gasoline-sterndrive engines, it should work.
ZF transmission have another planetary set that give ratios:
1. 2.82:1
2. 1.84:1
3. 1.36:1
4: 1:1
these could be better because ratios are closer together
I have three sets of props:
16.5x34 rolla
17x33 rolla
18x28 kiekhafer forged props
all four blades. Some day in future I get it ready and think put 18x28 on first.
Last edited by ksalmine; 02-15-2023 at 01:40 PM.
02-15-2023, 02:24 PM
#1893
Registered
Kidturbo
I opted to keep my diesel project as simple as possible as I spend limited time in the USA and wanted a boat that would run for 100s hours will minimum maintenance and was more than happy with a boat that would cruise down to the Keys at 90-100mph all day.
The project started with raw water-cooled 750hp Seateks that with a few modifications to the mechanical fuel system and a bit more boost will make 850+hp and still be very reliable, I have since got hold of the newer 850+hp closed-cooled version that with mods will make close to 1000hp, not that I need it as the boat performed much better than I expected with the 750s, The boat runs ZF305s which are single speed overdrive transmissions 0.86-1 on a hybrid Arneson/BPM drive and 10" extension.
Last time I was in Florida I splashed the boat for the first time and just grabbed a pair of props I had lying around to get it in the water, 17*28 four blades from what I remember and the boat popped right up on plane and had excellent acceleration, it was only in the water a few days so didn't really have time to do any real dialing in as I was busy just bugging out a few small gremlins with the rigging, we seen a good 80+ without trying and the props were way too small, ideally, I want to swap to the closed cooled 850+s next time and do some proper dialing in.
Just wondering if you fancy doing 850 engine swap for me so I can get this project moving along a bit quicker.
I opted to keep my diesel project as simple as possible as I spend limited time in the USA and wanted a boat that would run for 100s hours will minimum maintenance and was more than happy with a boat that would cruise down to the Keys at 90-100mph all day.
The project started with raw water-cooled 750hp Seateks that with a few modifications to the mechanical fuel system and a bit more boost will make 850+hp and still be very reliable, I have since got hold of the newer 850+hp closed-cooled version that with mods will make close to 1000hp, not that I need it as the boat performed much better than I expected with the 750s, The boat runs ZF305s which are single speed overdrive transmissions 0.86-1 on a hybrid Arneson/BPM drive and 10" extension.
Last time I was in Florida I splashed the boat for the first time and just grabbed a pair of props I had lying around to get it in the water, 17*28 four blades from what I remember and the boat popped right up on plane and had excellent acceleration, it was only in the water a few days so didn't really have time to do any real dialing in as I was busy just bugging out a few small gremlins with the rigging, we seen a good 80+ without trying and the props were way too small, ideally, I want to swap to the closed cooled 850+s next time and do some proper dialing in.
Just wondering if you fancy doing 850 engine swap for me so I can get this project moving along a bit quicker.
The following users liked this post:
kidturbo (02-15-2023)
02-15-2023, 08:09 PM
#1894
Gold Member
Gold Member
Japanese 4 cylinder diesels are everywhere here, dirt cheap and lots of cheap upgrades available locally. Also they make a horrible noise, and Thais love their cars, bikes and boats to be heard. 🙂
RR
The following 3 users liked this post by rak rua:
02-15-2023, 09:47 PM
#1895
Registered
Kidturbo
I opted to keep my diesel project as simple as possible as I spend limited time in the USA and wanted a boat that would run for 100s hours will minimum maintenance and was more than happy with a boat that would cruise down to the Keys at 90-100mph all day.
The project started with raw water-cooled 750hp Seateks that with a few modifications to the mechanical fuel system and a bit more boost will make 850+hp and still be very reliable, I have since got hold of the newer 850+hp closed-cooled version that with mods will make close to 1000hp, not that I need it as the boat performed much better than I expected with the 750s, The boat runs ZF305s which are single speed overdrive transmissions 0.86-1 on a hybrid Arneson/BPM drive and 10" extension.
Last time I was in Florida I splashed the boat for the first time and just grabbed a pair of props I had lying around to get it in the water, 17*28 four blades from what I remember and the boat popped right up on plane and had excellent acceleration, it was only in the water a few days so didn't really have time to do any real dialing in as I was busy just bugging out a few small gremlins with the rigging, we seen a good 80+ without trying and the props were way too small, ideally, I want to swap to the closed cooled 850+s next time and do some proper dialing in.
Just wondering if you fancy doing 850 engine swap for me so I can get this project moving along a bit quicker.
I opted to keep my diesel project as simple as possible as I spend limited time in the USA and wanted a boat that would run for 100s hours will minimum maintenance and was more than happy with a boat that would cruise down to the Keys at 90-100mph all day.
The project started with raw water-cooled 750hp Seateks that with a few modifications to the mechanical fuel system and a bit more boost will make 850+hp and still be very reliable, I have since got hold of the newer 850+hp closed-cooled version that with mods will make close to 1000hp, not that I need it as the boat performed much better than I expected with the 750s, The boat runs ZF305s which are single speed overdrive transmissions 0.86-1 on a hybrid Arneson/BPM drive and 10" extension.
Last time I was in Florida I splashed the boat for the first time and just grabbed a pair of props I had lying around to get it in the water, 17*28 four blades from what I remember and the boat popped right up on plane and had excellent acceleration, it was only in the water a few days so didn't really have time to do any real dialing in as I was busy just bugging out a few small gremlins with the rigging, we seen a good 80+ without trying and the props were way too small, ideally, I want to swap to the closed cooled 850+s next time and do some proper dialing in.
Just wondering if you fancy doing 850 engine swap for me so I can get this project moving along a bit quicker.
As you know I brought Voodoo back up to Ohio for the winter. Needed a clean place to tear into those engines. So I'd be honored to swap those Seateks for ya. If we can get me and your hardware in same location long enough to make it happen.Hit me up with your ideas.
02-15-2023, 10:21 PM
#1896
Registered
Industrial Injection out of Utah.
Has a decent rep in the C world. But just like Wagler, been schooled for the past 5 years in a row at all the big diesel events, by some true Amish boys "FirePunk" over here in the Buckeye state. Like they stepped straight outa the movie Sex Drive...
And there is the key to harnessing all that diesel torque, while ending up with a good propshaft speed.. Even gassers with big turbos like FB have found that extra gears let ya get those big wheels spun up where they like to eat with ease.
Has a decent rep in the C world. But just like Wagler, been schooled for the past 5 years in a row at all the big diesel events, by some true Amish boys "FirePunk" over here in the Buckeye state. Like they stepped straight outa the movie Sex Drive...
My Fountain shaft speeds will be the following:
after transmission is splitbox 0.555 overdrive so shaft speeds are
1. 314-1312rpm
2. 537-2241rpm
3. 760-3170rpm
4. 1080-4500rpm
If you compare to bbc performance engine, 1000rpm idle, 6000rpm max and 1.5:1 drive ratio, shaft speeds are 666rpm-4000rpm .
1.35:1 ratio give 740rpm-4444rpm
.
after transmission is splitbox 0.555 overdrive so shaft speeds are
1. 314-1312rpm
2. 537-2241rpm
3. 760-3170rpm
4. 1080-4500rpm
If you compare to bbc performance engine, 1000rpm idle, 6000rpm max and 1.5:1 drive ratio, shaft speeds are 666rpm-4000rpm .
1.35:1 ratio give 740rpm-4444rpm
.
02-16-2023, 05:23 AM
#1897
VIP Member
Or ya could just go buy a new Tesla, never turn a wrench, and let the wife make 9sec passes while explaining to all your buddies why electric cars are so much cooler.. Not.
If we keep hijacking his thread, think he will reply? LOL[/QUOTE]
Funny you should go here. Tyson took me for a Ride in his Plaid- Holy Hell is all I could say.
May not be the Coolest but most defiantly the Fasted ride I have been in.
If we keep hijacking his thread, think he will reply? LOL[/QUOTE]
Funny you should go here. Tyson took me for a Ride in his Plaid- Holy Hell is all I could say.
May not be the Coolest but most defiantly the Fasted ride I have been in.
