How fast can I go
09-14-2016, 02:26 PM
#22
Also idk how light that boat is, but I had a maxum that went over 60. It didn't chine walk bad and handled it pretty well. The only problem I found is when going that fast and hit much of a wave it would get air under the nose and start picking it up. It would lift enough you had to back off the throttle slowly or it would flip. 20 foot open bow boats are usually pretty light so just be careful to get to know it when it's done.
Putting the parts list together for my motor... Looking at proly 350+ hp.
Should get me to almost 60 I think... Adding 150hp should be a big Improvement lol.
09-14-2016, 02:30 PM
#23
Registered
iTrader: (1)
Yup, if a 350 hp 5.7L won't get that to 60,it's a pig. LOL.
Last edited by SB; 09-14-2016 at 02:32 PM.
09-14-2016, 02:39 PM
#24
My thoughts exactly... And I'm building a 383 with the added torque... 350/360hp should get me to 55 and maybe 60. I'm not really interested in the top speed... But really looking forward to cruising at 40 without the motor working that hard
09-14-2016, 04:56 PM
#25
A High 5 prop probably isn't the best prop for that, especially for top speed. Look for a Mirage Plus style prop to at least try with your new setup. Regarding how it will handle at top speed depends on the hull, conditions, prop, driver, and tabs.
09-21-2016, 07:01 PM
#26
Registered
That boat will do 60 all day with a 383 unless you totally wimp out on the engine build stuff. My 4000 lb 23 degree load does just about 60 with a fairly well designed 383.
Charter Member
09-22-2016, 08:42 AM
#29
Registered
Most 21 foot scarabs ran 60 with 260 horse and a 1.5-1 drive.
Your boat has a pad bottom like the scarab so 55-60 with a mild 383 should be cake unless the bottom has a big hook in it.
Your boat has a pad bottom like the scarab so 55-60 with a mild 383 should be cake unless the bottom has a big hook in it.
09-22-2016, 08:47 AM
#30
VIP Member
What is the biggest power package that they installed OEM on this hull?
You cannot just throw more HP at any hull, and expect it to improve speed and act/handle accordingly, linearly.
Sometimes you reach the limit of a hull's capability, and when you do; it let's you know in a hurry, and usually it's not pretty.
You cannot just throw more HP at any hull, and expect it to improve speed and act/handle accordingly, linearly.
Sometimes you reach the limit of a hull's capability, and when you do; it let's you know in a hurry, and usually it's not pretty.
