Thermostat pros & cons
+ Reply to Thread
Page 1 of 3 1 2 3 LastLast
Results 1 to 14 of 31

Thread:
Thermostat pros & cons

  1. #1
    Member
    Join Date
    Jul 2009
    Posts
    65

    Default Thermostat pros & cons

    I am wondering if the thermostat kits and crossovers work very well in a jet boat and if they are worth the money.
    Thanks in advance
    Tim
    Starting over

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member
    Join Date
    Jul 2008
    Location
    Kingman/Golden Vly, Az
    Posts
    1,278

    Default

    they probably work fine...i personally dont run a thermo...i control the heat in the motor with the spigot on the pump...i have temp probes in my heads & i adjust the flow of water until i get the temp i want in the heads @ 150/160...i have never had a problem ...IMO, the kits & crossover are way overpriced...just sayin' my .02 cents

    FastRat

  4. #3
    Senior Member ol guy's Avatar
    Join Date
    Mar 2008
    Location
    Lake Elsinore Ca
    Posts
    3,840

    Default

    This is my opinion and FWIW. thermostats were designed for a closed cooling system where water temp gets to a temp and the thermo regulates between radiator and motor! In a boat you have an ample supply of cold water. Now as per fast rats response limiting water to the motor will heat motor up, which is very correct. Problem with that is hot and cold spots in the motor create problems. What I do is hold the water in the motor by regulating exit, in other words holding the water in the motor longer to fill the holes and cool the motor equally. this is done by restricting the exit and adjusting at the source. There are alot of ways to restict exit and I simply jet the thru hull with a "jet" so to speak. Then feed for the temp I want. Normally 180-200 degrees. You can adjust up and down with the gate valve and bore diameter of the "exit jet" for desired temp, takes a couple of hours on the water but worth the time knowing the temp in the motor is equal thru-out the block and heads. AGAIN my opinion only!

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Member
    Join Date
    Jul 2009
    Posts
    65

    Default

    What I have is a gate valve on the inlet and a ball valve on the exit but i was worried about getting too much pressure and blowing a intake gasket, it has been a very long time since I have been on the water and in a Jet boat. 20 years ago I had a 455 olds in a jet boat and had a couple of problem with the intake. Maybe it was my adjustments that i was making at that time, but it was the same as what i have now. All info is greatly appreciated
    thanks
    Tim
    Starting over

  7. #5
    Senior Member ol guy's Avatar
    Join Date
    Mar 2008
    Location
    Lake Elsinore Ca
    Posts
    3,840

    Default

    AS stated it will take alittle time to get a correct adjustment. I would lose the valve on the exit and just restrict at a certain area then play with the source only. relieves to many variables to consider. I do not know what type of boat (drag,cruiser, or fishing boat for that matter) but it is all adjustable. I personally would prefer running on the hot side rather the the cold. TO A LIMIT of course. the engines in the boats we play with are designed for asphalt use and when we toss them into the cold water supply the games begin.M

  8. #6
    Super Moderator HammerDown's Avatar
    Join Date
    Dec 2007
    Location
    The Right Coast/SE-PA
    Posts
    5,488

    Thumbs up

    I've been running a REX thermostat bypass kit for over 10 years now >perfect!
    Always 160 degrees doesn't batter if the river/lake water is 40 degrees or 80 degrees >my water temp is consistent. No cold/hot spots in the block and I'm not restricting water flow via a valve.
    <img src=http://www.performanceboats.com/gallery/data/500/medium/06-30-11_1234.jpg border=0 alt= />

  9. #7
    Senior Member ol guy's Avatar
    Join Date
    Mar 2008
    Location
    Lake Elsinore Ca
    Posts
    3,840

    Default

    Quote Originally Posted by HammerDown View Post
    I've been running a REX thermostat bypass kit for over 10 years now >perfect!
    Always 160 degrees doesn't batter if the river/lake water is 40 degrees or 80 degrees >my water temp is consistent. No cold/hot spots in the block and I'm not restricting water flow via a valve.
    Glad to hear it and good job! My response was for simplicity and how I do It. PS is that batter for pan cakes or chocolate chip cookies? I love chocolate cookies!!! Just playing, I do typos all the time. M

  10. #8
    Super Moderator HammerDown's Avatar
    Join Date
    Dec 2007
    Location
    The Right Coast/SE-PA
    Posts
    5,488

    Default

    Quote Originally Posted by ol guy View Post
    Glad to hear it and good job! My response was for simplicity and how I do It. PS is that batter for pan cakes or chocolate chip cookies? I love chocolate cookies!!! Just playing, I do typos all the time. M
    Who the Fu*k stuck the B close to the M...
    CC Cookies do sound yummy!
    And what's a crossover...is that like walking into the light ?
    <img src=http://www.performanceboats.com/gallery/data/500/medium/06-30-11_1234.jpg border=0 alt= />

  11. #9
    Senior Member Rivernut's Avatar
    Join Date
    Jun 2009
    Location
    Massachusetts
    Posts
    163

    Default

    The only problem I've encountered running a thermostat with my SBC is that river debris gets caught in the thermostat and the spring valve. Mine overheated once from it. I put in a Felpro re-usable O-ring thermostat gasket so I can open it and clean it in a few minutes on the water. I use a 160 degree high flow Rob Shaw / Miloden Style. I go low temp for safety and drill additional steam holes. Bad things happen in a hurry at full throttle when clogged. The extra steam holes also ensure water drain out to prevent freeze damage. Pretty consistant temp in mid winter and summer in New England.

    Real Boats Don't Have Propellers!
    -- Rivernut

  12. #10
    Senior Member Mojave85's Avatar
    Join Date
    Feb 2008
    Location
    Boise, Idaho
    Posts
    628

    Default Thermostat Kit

    Quote Originally Posted by HammerDown View Post
    I've been running a REX thermostat bypass kit for over 10 years now >perfect!
    Always 160 degrees doesn't batter if the river/lake water is 40 degrees or 80 degrees >my water temp is consistent. No cold/hot spots in the block and I'm not restricting water flow via a valve.
    x2 - I have run the same setup for at least 10 years Always a consistent 160 degrees, never any problems.

  13. #11
    Senior Member 4trax's Avatar
    Join Date
    Dec 2007
    Location
    Shawano, Wi.
    Posts
    720

    Default

    Quote Originally Posted by HammerDown View Post
    I've been running a REX thermostat bypass kit for over 10 years now >perfect!
    Always 160 degrees doesn't batter if the river/lake water is 40 degrees or 80 degrees >my water temp is consistent. No cold/hot spots in the block and I'm not restricting water flow via a valve.
    Quote Originally Posted by Mojave85 View Post
    x2 - I have run the same setup for at least 10 years Always a consistent 160 degrees, never any problems.
    Same here
    I went in and got recircumsized again........I lost 10lbs. & was able to save the lives of 3 children in the burn center.........but it's not my fault they turned out to be dickheads.

    [email protected]

  14. #12
    Member
    Join Date
    Jul 2009
    Posts
    65

    Default

    Thanks guys, all good info. My boat is a 88 Eliminator ski boat with a 496 BBC and we have had alot of problems with the engines from little mistakes and just didn't want to make another. Now we are going to the lake this weekend and do some adjustments and see if it will run longer than an hour. B.O.A.T. (Bring On Another Thousand)
    Thanks again!
    Tim
    Starting over

  15. #13
    Senior Member CK7684's Avatar
    Join Date
    Aug 2008
    Location
    Minnesota
    Posts
    550

    Default

    I've been running a thermostat with no problems...as far as pressure, I also have a pressure regulator with a bypass...

  16. #14
    Senior Member
    Join Date
    Sep 2008
    Posts
    155

    Default

    Quote Originally Posted by HammerDown View Post
    I've been running a REX thermostat bypass kit for over 10 years now >perfect!
    Always 160 degrees doesn't batter if the river/lake water is 40 degrees or 80 degrees >my water temp is consistent. No cold/hot spots in the block and I'm not restricting water flow via a valve.
    I'd think that when the thermostat opens, there should be a rush of cold water coming in and the temp gauge would go down by at least 5 or 10 degrees before it stabilizes again. Is that not the case? I.e., when you say constant 160, is it really that with no fluctuations at all [as you'd expect to see if you were running a water recirculating pump]?
    Last edited by Mike123; 05-20-2010 at 01:16 PM.

+ Reply to Thread
Page 1 of 3 1 2 3 LastLast

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Please select your insurance company (Optional)

Log-in


Digg This Thread

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •  
 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95