Performance Boats Forum banner

1 - 20 of 32 Posts

·
Registered
Joined
·
376 Posts
Discussion Starter #1
I have a old 1/4 stringer Tahiti runnin about 350 to 400 hp BBC, thinkin about putin in a 150 to 200 shot of spray. I know I should not run more then about 500 hp in the boat but will I be risking stringer problems with more then 500 hp on the spray?
 

·
Registered
Joined
·
2,135 Posts
If the stringers are solid you should be fine. I would be more concerned with running a boat with 1/4 stringers in big water, let alone with soggy 1/4 stringers in big water.
 

·
Glendale Arizona
Joined
·
2,368 Posts
Just my opinion but a 75hp or even 100hp doesn't even feel like much. What do others think?
When I ran a 100 hp shot it was good for 6 mph. That's a pretty good gain in jetboat land. Also very safe. Almost impossible to blow anything up. No fancy timing controls required etc.

Only running a 150 now. Still no timing controls, and pretty darned safe. The 150 is good for 7-8 mph consistently.

7-8 mph gain for approximately $400 is a pretty good investment/upgrade in my book. Not too many other things that would net you the same gain for that amount of money.

The only down side is laying down $60+ every time you need to fill a bottle.
 

·
Registered
Joined
·
258 Posts
I had a family member give me a complete pro shot fogger system that I will be putting on the boat this summer, As this kit was going to go into a car I recived the bottel blanket and heater. I'm sure the heater is not needed how about the blanket? Does it help with temp, or just throw a wet towel on there if needed. If not needed I will be selling these, let me know if someone wants them. Thanks for the info.
 

·
Resident Ford Nut
Joined
·
10,079 Posts
I have a very mild 460, I was wondering if a 75 or 100 shot wet system would be ok. Brand new motor.
Ditto to what Dan wrote. A 100-125 shot should be pretty easy on the engine. My first Nos system was a 125-150 shot it never hurt anything.

Sleeper CP :D
 

·
Registered
Joined
·
653 Posts
I had a family member give me a complete pro shot fogger system that I will be putting on the boat this summer, As this kit was going to go into a car I recived the bottel blanket and heater. I'm sure the heater is not needed how about the blanket? Does it help with temp, or just throw a wet towel on there if needed. If not needed I will be selling these, let me know if someone wants them. Thanks for the info.
I'm was wondering that also, I would mount the bottle under the bow on a river boat, outa the sun.
 

·
Glendale Arizona
Joined
·
2,368 Posts
I had a family member give me a complete pro shot fogger system that I will be putting on the boat this summer, As this kit was going to go into a car I recived the bottel blanket and heater. I'm sure the heater is not needed how about the blanket? Does it help with temp, or just throw a wet towel on there if needed. If not needed I will be selling these, let me know if someone wants them. Thanks for the info.
You might want to hang on to that stuff. I have a heater and blanket. Keep in mind that while it's nice n toastie in the summertime, if the ambient air temp drops below 85 in the shade (basically anything less than 90 degrees in the sun).........your kit will be rendered useless.

I like to run my boat in the early spring, late fall and even winter months sometimes. I've had it happen before when the juice would've been the deciding factor in a little grudge match and with no heater.........no win. Just as an example. The photo in the avatar was from a get together here in Phoenix. We had cooler temps around 80 degrees or so. Paired up with several boats and we were all dead even running 80 mph on gps. If the heater would've been working properly and I had another 7-8 mph...........? Let's just say it would've been a much better day.

If you do decide to sell the heater I might be interested. Mine has a nominal working voltage of 13.7 VDC and even with the boat running and alternator spinning, it's marginal. Take a look and see what the nominal/minumum voltage to operate is. If it's lower than 13 VDC I'd be intersted. Shoot me a pm if you want to sell it.
 

·
Registered
Joined
·
258 Posts
You might want to hang on to that stuff. I have a heater and blanket. Keep in mind that while it's nice n toastie in the summertime, if the ambient air temp drops below 85 in the shade (basically anything less than 90 degrees in the sun).........your kit will be rendered useless.

I like to run my boat in the early spring, late fall and even winter months sometimes. I've had it happen before when the juice would've been the deciding factor in a little grudge match and with no heater.........no win. Just as an example. The photo in the avatar was from a get together here in Phoenix. We had cooler temps around 80 degrees or so. Paired up with several boats and we were all dead even running 80 mph on gps. If the heater would've been working properly and I had another 7-8 mph...........? Let's just say it would've been a much better day.

If you do decide to sell the heater I might be interested. Mine has a nominal working voltage of 13.7 VDC and even with the boat running and alternator spinning, it's marginal. Take a look and see what the nominal/minumum voltage to operate is. If it's lower than 13 VDC I'd be intersted. Shoot me a pm if you want to sell it.
Thanks let me look into it, and let you know.
 

·
Glendale Arizona
Joined
·
2,368 Posts
Keep in mind that 200 is where she starts getting a little dicey. Make a misake there and you could be scattering some parts. Timing controls will be a necessity raising the ante for buy in. Also should be running better fuels (not pump gas anymore).

All reasons why I stick with the 150 shot.
 

·
The Man
Joined
·
1,788 Posts
Keep in mind that 200 is where she starts getting a little dicey. Make a misake there and you could be scattering some parts. Timing controls will be a necessity raising the ante for buy in. Also should be running better fuels (not pump gas anymore).

All reasons why I stick with the 150 shot.
Yea, I'm setting up a dedicated fuel system to run some 110 or so for the nitrous. I'm working on getting some sort if timing retard/ignition as well.
 

·
Registered
Joined
·
376 Posts
Discussion Starter #16
Keep in mind that 200 is where she starts getting a little dicey. Make a misake there and you could be scattering some parts. Timing controls will be a necessity raising the ante for buy in. Also should be running better fuels (not pump gas anymore).

All reasons why I stick with the 150 shot.
The kit I'm lookin at starts at 150 also 200 and 250 but I the the 150 would be ok for now. According to NOS you can run a 150 shot and still be ok with a cast crank. Dose this sound right to everone?
 

·
Glendale Arizona
Joined
·
2,368 Posts
The kit I'm lookin at starts at 150 also 200 and 250 but I the the 150 would be ok for now. According to NOS you can run a 150 shot and still be ok with a cast crank. Dose this sound right to everone?
I'm running a cast crank turned .010". In fact my bottom end is stock. Stock recon'd rods, stock crank, stock two bolt main caps, I am running some low buck SRP forged pistons though.

Yea, I'm setting up a dedicated fuel system to run some 110 or so for the nitrous. I'm working on getting some sort if timing retard/ignition as well.
That's probably wise with the 200. Especially if you think you might step it up sometime. You'd be better off talking to some of these guys that run the bigger shots. I'm sure they would have some good information for you. I've got no practical experience above 150.

I like running pump gas. My motor was built with this in mind (9.6:1 compression), and the nitrous kit was assembled and is being run with the same strategy.
 

·
E-7 Sheepdog (ret)
Joined
·
6,834 Posts
The kit I'm lookin at starts at 150 also 200 and 250 but I the the 150 would be ok for now. According to NOS you can run a 150 shot and still be ok with a cast crank. Dose this sound right to everone?
I'm doing it on a cast crank, stock rods, cast pistons too. :D:D

RPM is worse on the cast crank than the pressure against it. You can lean on the cast cranks VERY hard untill you decide to run north of 6,000RPM or so.
 
1 - 20 of 32 Posts
Top