Whats the lowest powered STV that you have ever seen?

**Capt.Insane-o** · 05-21-2020, 11:26 PM

I wouldn't weld on that skeg and if it's not ill handling adding tab to the skeg is just going to slow it down.

**JPEROG** · 05-22-2020, 04:04 AM

Originally Posted by David

Does it porpoise?

Absolutely zero. I will get video of it soon. We got lucky that it does everything right.

Joe

**Jimboat** · 05-22-2020, 01:58 PM

Originally Posted by JPEROG

STV Pro Comp with 115 optimax. Any idea what it should run with 2.33 and a 5750 limiter. Joe

Hi Joe - when i do a quick check using "Tunnel Boat Design Program" software, using my STV model and 100lb driver and 115 optimax engine (no other details, sorry), i get top speed 74mph. maybe this helps? (naturally the results depend on actual setup, so used a 'middle-of-the-road' hull setup to get a 'quick' check on possible speeds).

**FUJIMO** · 05-22-2020, 02:48 PM

...Kid's Nowadays...I'll Tell Ya...They Are Sooooo Smart...lol...

**rock** · 05-23-2020, 06:47 AM

Good job Joe. nice rig.

Rock

**Mad Maximillion** · 05-23-2020, 10:08 AM

Sweet rig!

**JPEROG** · 05-23-2020, 10:31 AM

Originally Posted by Jimboat

Hi Joe - when i do a quick check using "Tunnel Boat Design Program" software, using my STV model and 100lb driver and 115 optimax engine (no other details, sorry), i get top speed 74mph. maybe this helps?

Your model is very close. He clicked of four 80 mph passes this morning with a 31 Bblades Blaster at 6100. Remember this is now a 2.07 gear in place of the stock 2.33, the limiter is at 6250 instead of 5750, its a modified 15" midsection that can blow its breath, it is a small case, small skeg, and the motor is high. Bottom line is that I never thought it would have the capability that it does.

Joe

**Jimboat** · 05-23-2020, 11:01 AM

Originally Posted by JPEROG

Your model is very close. He clicked of four 80 mph passes this morning with a 31 Bblades Blaster at 6100. Remember this is now a 2.07 gear in place of the stock 2.33, the limiter is at 6250 instead of 5750, its a modified 15" midsection that can blow its breath, it is a small case, small skeg, and the motor is high. Bottom line is that I never thought it would have the capability that it does.Joe

good job, Joe! sounds like we tested the same boat! i'm sure that if I input your actual hull weights and setup changes, that the TBDP would accurately align with your water results. Your hull design is very sensitive to setup, power and weights, especially at lower speeds. You're getting great performance of that engine!