Who runs closed cooling??
 

Does anyone run closed cooling on there boats? Has anyone done it on an HP500?

yeah,,,my parents do w/ 900's...why would u want to do this???

Audacity, On my 496HO I have found that the closed cooling reduces the amount of temperature variations on the motor. Since the engines computer controls the air fuel mixture based upon thermal properties, it would make since that performance could be potentially enhanced by the use of this system. The second issue is to minimize the amount of seawater intrusion into the motor. Depending on your operating environment you could potentially lengthen the life of your block, heads, waterpump, intake manifold etc.. by the use of these systems. These are a couple of the reasons I asked the question.
What kind of speeds are your parents getting out of there boat with the 900's? Do they ever let you take it out? LOL

Hey Bill R, You out there?

Gotta love not having to flush them engines, plus additional life on your motor, sometimes I wish I had closed cooling seeing that I boat 100 percent of the time in salt water :D :D :D

It only makes since. I went with the 496's due to this feature. The reason it is not standard on all power packages is due to the ability of builders to satisfy cooling requirements without it and reduce production cost. If a good system that folks had used was available for the 500's I would consider it for my next boat.

I've also got the 496HO with c/c. It's definately the best feature that you can appreciate on a daily basis. Flushing is a piece of cake, temperatures are always constant, and the best peace of mind comes from knowing that saltwater never gets into the engine. Even when flushing isn't practical on certain occasions when leaving the boat in the water overnight or camping you know the damage won't be as bad. You can also completely evacuate ALL the water from the system with a handy little hand-operated bicycle pump.

Down the road, replacing a heat exchanger and manifolds and risers will cost a lot less than a rotted block, etc!

iam a saltwater boatert.i just bought a new boat and having it installed on both motors. :)

JimH, Which motors? Thanks

that motor u have is not a MAF set up...it is a speed density set-up...so after the warm-up sec. temp is not an issue...headers use raw water...and yes i use the boat a lot....but work on it more..i have a permenate seat right next to the engines!!! for me it's a waste of weight...just take care of it better. we have had a TON of engine failure due to a f'ed up header from salt! not blocks....heat and air combined with salt and water is a very bad thing...block sees no heat or air for the most part.

I don't think it is much of a concern, however while we are on the topic. Can I anticipate any damage from leaving my Formula in salt water for a week? (420's open cooling)
This will only occur on my Florida trip.
Thoughts.

Innovation does closed cooling on most of its new motors. All of the Volvo motors are close cooled. That Volvo project ic on hold right now so they have some complete motors that they are blowing out right now with exhaust. 500's and 600's w/ warrenty 16 and 24 thousand.

One thing that is sure "Rust never Sleeps", anything that can be done to eliminate portions of the exposed area (internal or external) from the effects of water contaminates I feel is a good thing. As indicated, maintenance is the key regardless of how the engine is cooled. As for the weight, preventing internal engine component contamination is worth the couple of extra pounds. Nice thread thanks for the feedback.

FIRST of all, understand a few things. What are the problem areas on the engine from salt water? The riser/headers! NOT the block. I have NEVER heard of a block rusting out. Closed cooling still runs "raw" salt water through the risers for coolong...so what is the advantage? It doesn't do what most think it should.

thank u SD :D ....most of our cmi and stelling big tube motor failure have been riser and right at the flange at the head right at the first weld....they need a lot of attention!!

Good point SD. But the block is not the only consideration. Ideally a full system would be the answer to long term freedom from the harmful effects of rust and contamination. I appreciate your response. As indicated, the additional seawater components are the majority of the headaches. It appears the 496 external components have answered some of the issues that were related to the earlier designs. I have noticed the engine temperature is a lot more stable with the 496HO than the traditional approach to cooling used in the open system. Bottom line is Rust Stinks! My initial question was there a kit for the HP500. If anyone knows of any I would appreciate the feedback. Thanks again!!

The risers are stainless steel on the 496HO's...

Hey Reck, Where you been dude!!! Nice seeing you last night. We are getting quite a family majority down here. Your brother seems to be settling in well. Did you get your Mag from the box? When do you want to get together and JAM!!!

donziman2 i have the mercruiser 350 mpi's

Thanks Jim, Nice motors. DMAN2

We had closed fresh water cooling on our old B class race boat. It helps with having even temps between the cylinders. Usually the ends are cold and the center is hot. Using a closed system helps.

Plus who would want salt water to run through there engine if they didn't have to?

Ron P, Thanks, I have noticed the same thing on the 496HO. The engine temperatures are very stable regardless of the ambient climate factors. I see what you are saying. I don't think I will drain the anti-freeze out of my boat and vehicles and replace it with Lake, River, or Salt water. Every little bit helps. Thanks again.

Reck, You still on-line?

Well, I live in Davenport Iowa and boat on the Mississippi, so salt water is not a concern here. We have had such a mild winter here this year, I have thought a number of times about taking the boat out but haven't because I didn't want to winterize again to avoid a frozen block. Seems like the closed cooling system would allow me to sneak out once in a while without worrying about it freezing up. Am I thinking right about this or would there be other areas to be concerned with freezing? Anyone have any idea of the cost to add it to a 454 MPI?
Thanks
RDUB

Rdub: You do not want to add it to a motor that has been running for a while with regular cooling system in it. I tried and it was not successfull. To much crap gets in the exchanger and causes all kinds of problems. They systems range from 150 bucks used to 1800 new

Jon

Oh ya you still do have to winterize, however you only have to draine the Manifolds, coolers, and the water pump. Obviously that is MUCH easier then doing the whole motor :D :D

Jon

BAM used to have a page on their Hi-po FWC. I did find this pic on their site.

VERY NICE :eek: http://www.go-fast.com/fwc_sc900.htm

Thanks for the Info.

DONZIMAN2:
Call Innovation in Sarasota, as Ryan said they made the system for Volvo but more important thet did it to the military engines. My thinking is if the military has it there have to be a good reason.
The guys at Innovation are great and they will help you. If I new about them before I did my engines I would have it.

[ 01-25-2002: Message edited by: Dr.Santiago ]

We had a log style exchanger on the floor of the engine compartment for each engine. Of course sea strainers are an absolute must with this set up.

Take about plumbing. We had a red handle in the boat that would devert the exhasted water either to exit out the back OR send it foward to fill the ballast tank in the bow. The blue handle either held the water in the ballast tank or let it drain out a 3 inch fire hose. We could lower the bow by 5 inches sitting at the dock idling.

We also had electric pumps to move fuel during the race between tanks. Sweet boat.

This thread has been great. I sincerly appreciate the inputs. I will try some of the folks suggested. Keep it coming.

Closed Cooling was the best investment ever.
i recomend it to all. even in fresh water.
C/C is the cats meow. The added weight is about 18#s per engine. this is nothing in my eyes verses Gear and other junk on board. Mr. Bravo III :p