The Magnaflow and Getting The Temp. up?

[DansBlown73Nordic]

Ok now I have the Magnaflow working like a charm. I ran the boat yesturday. The tempature was 150 deg. at idle. At speed it was around 100 deg. So what is the best way to regulate the temp? Cold water enters my block through the water pump inlets. Then exits through the thermostat housing. Should I ad a thermostat? Or should I ad a ball valves on each inlet after the pump?

[LeE ss13]

Use only one outlet on the Magnaflow pump to the two inlets on the engine. Run the other pump outlet overboard. If you need a little more temp control, put a valve on the pump hose going overboard. Running the engine at full speed making about 500 hp with the overboard water wide open, the temp should be about 190. What ever you do DON'T restrict the engine outlet water. It will raise the engine water pressure high enough to get water in the oil.

[DansBlown73Nordic]

Yes I realize that. I hate to drill a hole in the boat.

[DaveA]

Dans66Stevens:
Yes I realize that. I hate to drill a hole in the boat. No holes? No problemo!
DaveA's No Holes/No Problems Magnaflow Flow Diverter Kit is just what you need!!
Perfect for temporary use when you need to keep heat in the block on those long runs, or can be installed full time for the occasional opportunity to help out a fellow boater.
http://www.sjiyc.com/OpeningDay2001photos/Fireboat.jpg

[DansBlown73Nordic]

Thanks....... :D LMAO

[Lookin for Liquid]

The way we do it is to drill and tap the -8 fittings under the flared hose end at the water pump inlets for enderle pills that are drilled out to sizes of .150-.300 that go in the block at the water pump inlets. It will not create excessive water pressure in the block if you restrict it at that point.

[DansBlown73Nordic]

OK that makes sense, but could I just ad a 160 thermostat? Or just put a restrictor in the thermostat housing?

[DansBlown73Nordic]

http://www.***boat.com/image_center/data/524/76CNXT0004-med.jpg

[DUCKY]

Dans66Stevens:
OK that makes sense, but could I just ad a 160 thermostat? Or just put a restrictor in the thermostat housing? Don't bother putting a t-stat in it, unless you get a kit from Rex Marine. The pump will just blow the t-stat open. What I have done, and it seems to work, it I put tees in the inlet lines (In between the pump and block) and ran those hoses to another tee and a gate valve. By opening the valve, I am cutting down on the volume of water in the block while not overloading the pump with back pressure. I also put a gate valve on my outlet so I can turn it down a little to bring the block pressure back up to prevent air pockets. Mine idles at about 180-190 and runs at about 140-150. I have a water pressure gauge. and I have about 8psi water press.

[DansBlown73Nordic]

Another shot of my set-up http://www.***boat.com/image_center/data/524/76CNXT0007-med.jpg

[DansBlown73Nordic]

Maybe I will just try a washer in the T-stat hole and see If I can restrict it a little.

[DansBlown73Nordic]

Here is a shot of my Bad Ass headers....These things sound great.... smile_sp
http://www.***boat.com/image_center/data/520/76Headers_1-med.jpg
[ July 13, 2003, 06:00 PM: Message edited by: Dans66Stevens ]

[Rexone]

Dans66Stevens:
Maybe I will just try a washer in the T-stat hole and see If I can restrict it a little. I advise not to restrict water exiting in this manner. Pressure increase as mentioned above.
Thermostat setup, LeE ss13,s method, or Ducky's will all work adequately. The key is to "bypass" the excess water you don't need, not to restrict it.

[Lookin for Liquid]

Thanks Mike, I thought I made it clear but I guess I didn't. Restrictors in the inlet side of the block dont create excess pressure in the block,....from what I hear.

[DUCKY]

Lookin for Liquid:
Thanks Mike, I thought I made it clear but I guess I didn't. Restrictors in the inlet side of the block dont create excess pressure in the block,....from what I hear. restricting the flow before the engine without a bypass can blow the o-ring right out of the pump and bend the cover plate. I did it on accident. Sprayed water all over the place!

[Rexone]

I have to agree. Bypass the excess water so there is no excess pressure anywhere to create problems. Do it with a valve then you can fine tune the temp as described above to some extent. :)

[infotraker]

I also had (maybe still have) a temp prob. in BBC 468. I had no temp showing at all (below 100), added the themo housing and stat with overflow valve CP Performannce(inside housing). Temp. from intake manifold below themo housing shows about 160 while cruising and both head temp only goes to about 120 tops. I am also running a magnaflow using both outlets.

[mickeyfinn]

Just cut a tee into your line leaving the engine going to the exhaust. Run one of the pump outlets to this tee and put a valve on the line. You can use this valve to regulate the water to the block and set the temp where you want it. The only down side to this is if you are running OT exhaust you will have more water on one side than the other. If you don't like that cut a tee into both lines and tee one of the pump outlets to both of them and valve before the tee on the water pump outlet.

[superdave013]

Dan, your not running it hard enough! Mash the gas for about 45 - 50 miles and it will heat up. :D lol
I use the bypass system but it only bypasses when it hits 20psi.
Those headers are bad ass! Have you ever seen the price tag on a new set? jawdrop

[Lookin for Liquid]

WOW!....Now there's a theory. Maybe thats why your selling those 12's on the Bay.

[Lookin for Liquid]

WOW!....Now there's a theory. Maybe thats why your selling those 12's on the Bay.