Wondering how to post images or maybe change your avatar or maybe something else?
You can find that and a lot of other useful tips for using the forums in the HydrostreamForums Knowledge Base.

To visit the HydrostreamForums Knowledge Base CLICK HERE

Vector porpoising

Have questions about setting up your boat? Engine height, setback, prop, etc.
User avatar

Topic Author
YDOC462
HSF Lifetime Supporter
HSF Lifetime Supporter
Posts: 901
Joined: Apr 11, 2010 12:57 pm
Location: beaumont, tx
Has thanked: 23 times
Been thanked: 5 times
Contact:

Vector porpoising

Post: # 12891Post YDOC462 »

Spoke with a guy who has had some experience with hydrostream and he seems to think I'm gonna have major porpoising issues. says I ned to rework bottom. Want yalls opinion.
When I got the vector the pad had already been modified. The concave cup had been taken out.now the pad is square. All I did to the bottom was sharpen all the strakes.
My plan on set up is to go with a bobs 2 in 1 jackplate allowing me to choose between a 2 inch or 5 inch setback.
Starting with prop some where around pad. hydrostream org says he ran vectors motor on trans with alot of success
And I've also heard vector guys like around 5 inch setback.

Any opinions? vector guys with experience?

Boats also came with trim tabs. Think about replacing?

I dont plan on touching the pad until I run the boat. Just in search of some info

[ Post made via Android ] Image
81 vector....complete restore....1991 7 pedal 200 slightly modded
ALWAYS under construction

Image
HYDROSTREAM HELLIONS
https://www.youtube.com/watch?v=YHE8wWZsFpw
User avatar

Hippie459MN
Site Admin
Site Admin
Posts: 3966
Joined: Mar 25, 2009 7:31 pm
Location: Nowthen, MN
Has thanked: 346 times
Been thanked: 80 times
Contact:

Re: Vector porpoising

Post: # 12895Post Hippie459MN »

Hard to say what its gonna do till ya get it in the water. I cant tell you how a boat will perform just by it sitting on a trailer. All about seat time

Take Chets Vegas for instance, He can drive that thing up on the pad great but he let a friend in the boat club use it this last season for the races and it was all over the place for that guy. I thought he was gonna toss himself right out the boat a few time. LoL

Just get it done, in the water, then tune from there. :up:
-Kevin
Project Vulture | Project Vector | Project Vamp | Project Vixen
The Vulture Wish List | Project CobraJet

1977 HydroStream Vulture - Worlds longest ongoing project. :eek:
1982 Hydrostream Vector
1982 Hydrostream Vamp
1973 Hydrostream Vixen
1976 CobraJet Jet Boat - Outboard conversion project
1976 Pontoon - aka The Family Truckster
User avatar

transomstand
Hydrostream Addict
Hydrostream Addict
Posts: 420
Joined: Apr 07, 2009 6:50 pm
Location: Fairfield, CT
Been thanked: 9 times
Contact:

Re: Vector porpoising

Post: # 12898Post transomstand »

Unfortunately, I can't remember a conversation I've had about a Vector with a modified bottom, that came to a happy ending. I think you've got your work cut out for you. Wish I had better news.
transomstand
Original owner 1975 Ventura II SE
User avatar

77viper
HSF Supporting Vendor
HSF Supporting Vendor
Posts: 1989
Joined: Mar 29, 2009 11:38 pm
Location: montgomery MN
Contact:

Re: Vector porpoising

Post: # 12906Post 77viper »

Go with the bob's and set it at 2.5" that way moving it up or down is a lot easier. As far as the bottom is concerned I'm with TS but since it's already been messed with you will need to drive it first and see what it does. I can make my viper porpoise if I try but it's all in trim angle, that and I rarely drive at 40 mph. I would stay away from the tabs.
Samari on s&f
Chet Olson

75 viper 2.4 200, 130 shot of NOS
91 vegas loaned out
79 vking project 2.5 280
User avatar

rev.ronnie
HSF Lifetime Supporter
HSF Lifetime Supporter
Posts: 165
Joined: Jan 24, 2010 10:34 pm
Location: North Branch/Pine City MN
Contact:

Re: Vector porpoising

Post: # 12914Post rev.ronnie »

My Viper 2 has the OEM trim tabs. They are said to really help reduce porpoising.

[ Post made via iPad ] Image
1990 HST / 260 EFI offshore
1991 Vaserette YT bowrider 200 Merc
1987 Venus XT/ 200 Yamaha
1983 Viper II 90 Merc. triple
User avatar

smiles
Getting my feet wet
Getting my feet wet
Posts: 22
Joined: Mar 05, 2012 2:32 pm
Location: st. paul
Contact:

Re: Vector porpoising

Post: # 13816Post smiles »

i've herd its more of a racing setup. harder to drive, but should run faster and turn better. (just what i've herd) :boating: tabs are going to slow you down...get rid of them
Post Reply

  • Random Topics
    Replies
    Views
    Last post

Who is online

Users browsing this forum: Google [Bot] and 16 guests