Closed cooling for engines over1000hp
 

All I seen is closed cooling for up to 600hp. Is there closed cooling systems for a 1200hp supercharged motor?

Perfprotech used to have a kit that Monitor products provided the heat exchanger and most components.

https://www.perfprotech.com/high-per...product/242843

https://www.perfprotech.com/store/ap...erformance.pdf

PM park35.

He's got big motors with closed cooling. I'll say my 800's (which are never run to that level to be fair) are closed cooled with the CP performance kit and the temps sit at 150 all the time with 140 starts. It's uncanny. Even after 25 minutes of running when oil has climbed to 230-240 the temps haven't moved. It's a wonderful upgrade......

Thanks will check into it

look on eBay flat plate coolers have a set on 1200hp turbo motors and na960hp 10x20” around 50 plate.

I'll chime in here....I converted to closed cooling....almost 1100hp...first...what is the water temp in the lake or ocean that u boat in.....?? Next need a 3stage water pump...min water pressure at wide open 45 lbs....i run maybe 3 to 4 minutes wfo...still holds 120 temp water temp is 60-75 degs...there is more to making it work..but it can be done

https://cimg8.ibsrv.net/gimg/www.off...142bb44710.jpg

Thanks for the help. Will be in South Florida Atlantic. Summer water temps 85 degree water temps. I'm just thinking if I throw big money in big horsepower motors I don't want my heads intake getting trashed by the salt to early

Park35...... Is there just not a lot of guys running big blower numbers with no closed cooling? Seems some big money motors like Sterling's they would want to protect their investment. Or maybe people have that much money they don't care salt eats aluminum very quick even with flushing motors after each outing
r

I made heat exchanger to my diesel Fountain project. It have 50m 8mm copper tube, cut to 70 tubes, if my calculation go right, its ok to 3000hp engine power. Maybe 2000hp to gasoline engine because efficiency is so poor. 3 way thermostat and full flow inside circuit and good air bleed is must. Very simple system.

I first put closed cooling in my Cigarette back in the early 80's after losing my first set of heads to saltwater. I lived in Chicago at the time but the boat spent winters in Florida. Only had 800 hp at the time. To be honest I didn't do the math as far as sizing but put in the biggest heat exchangers I could fit (6" x 30" ) knowing I would wind up with more power. I mounted them in front of the rear engine.

The expansion tank is visible on the forward bulkhead. This pic is from early 90's when I had 1000 hp blower motors ps they ran on 89 octane. Water temp would hold at whatever the thermostat regardless of speed.
I'll see if I can find some better pictures.

The benefits of closed cooling are way more than the lack or corrosion:

• Constant block pressure with glycol raises boiling point - helps control steam pockets
• Constant block temp
• Non aerated water in block removes heat better - see above
• Unrestricted water flow through oil coolers and exhaust

Later in life I did some more projects, all closed cooled.

I still have a pair of big heat exchangers at the shop. I'll post some pictures tomorrow.


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Michigan City poker run

Hey Mark were you able to run a reg merc seapump on that setup or did it require a two or three stage pump?

At the time there really weren't any multistage around. I was going to build something but never got around to it. My other idea was a much larger sea pump and slow the rpm down on it.

I wound up lowering my transom water pickups so I had pressure at speed. I measured the pressure at the header feed tube. That's all that really matters with the closed system.

I am sure I lost a few MPH in the process. Today I would run either a multi-stage or bigger pump for sure. Also I would plumb the water system with 1 1/4 pipe (1 1/2" hose) instead of 1" (1 1/4" hose)

Great picture of a runaway dinghy navigating through the marina in the background......

I think it was being towed lol

I might have a similar heat exchanger to Mbams at the shop. How many are you looking for?

Thanks for all the info great project and many benefits. Thanks for the pictures. What do you think rhe percentage of people with high hp motors running closed cooling?

I keep looking at Bam's picture and I still can't see a runaway dinghy or a heat exchanger!

I really want to do this to my 1200hp blower motors I also hear you gain a bit of power and fuel efficiency

14 apache..........The flat plate exchanger (cooler) seems like a great alternative to the shell & tube exchanger typically used on closed cooling systems.
There many times less the size and many times cheaper............do you still operate with a flat plate exchanger?.....Seems the way to go since a hi perf
closed cooling system by Monitor or PPT is far more expensive and there backordered till spring.............any picture you can share?

Alfa Laval is who makes all of the heat exchangers and closed cooling systems for the big CAT, MTU, Man, Cummins, etc…. We just had ours cleaned and taken apart for the 1000hr service. Pretty cool how it comes apart and is able to be cleaned/inspected, then put back together.

https://www.alfalaval.us/industries/...oling-systems/

That is so cool!.....I want to learn more about installation, I've had Imco manifolds destroyed from salt....almost hydrolocked the engine when they finally leaked thru.
What application is yours & in what type boat?...full closed cooling?........can you buy from Alfa Laval or only a distributor?......I know the shell & tube heat exchangers
are pricey..........what about flat plate heat exchangers?....I really like the alternatives to size and heat displacement over shell & tube but need to know more real world
applications for my boat.

We have man V12 1400’s in our 63 Riva. If you look closely at the front of the engine where it says “Man” you will see that is the heat exchanger and the coolant reservoir.

https://www.engines.man.eu/man/media...180315_web.pdf

That's a Luxury motor Yacht application, don't know how it (would or could) be applicable to my 35' Cig......but all the basic principles
for the flat plate technology are there........I wish Bad Chad was into boat!

Most of the alfa laval exchangers are very heavy, with 1" steel plates on either end and stainless midsection.
in a 63' nbd, but in a 35' offshore its not efficient.

Check out Mr. Cool.com they had lightweight tube and shell units...

tube and shell are also easier to service...

I am at a little over 700 hp and using a monitor pro setup when this was a mag mpi engine. Haven’t seen temps over 160 even running in 90+ degree water.

https://cimg0.ibsrv.net/gimg/www.off...dfa8c723d.jpeg

Space and efficiency was my first thought with a flat plate exchangers setup, but neither seems to work in that order........I'll circle back (to use a stupid term) to shell & tube installations

That's a really neat setup!.....Was it rigged new with engine install - or - added afterwards? - is it full closed cooling (engine & manifolds?) ....monitor I believe is backordered till spring ..

It was rigged out of the boat after the rebuild. It’s a half system.

I made a heat exchanger from DD15 Detroit EGR cooler. It works very well. Easily cools 1200hp. I have added fittings to dump excess water pressure and water pressure gauge. All pretty simple, Just had it cleaned, Pressure tested and then got busy for a few hours with the tig. Easy as...

Interesting!....do you have pictures of your setup.?.....Was it a used EGR cooler you installed?...........I know in their application, hot exhaust gases pass through them and units could last as long as 80,000 miles.
I've seen prices for used DD15 ERG COOLERS for $600, but don't know what condition.........I get the principles behind their use just would like to know substituting ERG Coolers for the typical closed cooling
Shell & Tube heat exchangers are a way around the big cost?.......because ERG coolers go through tremendous heat exposure using a used one would be as gamble, but isn't everything when considered.

I used a second hand one. The environment is way easier than the environment on the DD15. They have 40 psi at 600 degreed going through them. The cooling is easily enough for a blown hand built 540 running 8psi. The build quality is way superior than a normal marine cooler. Easy to weld fittings on with a tig...Just get one chemically cleaned and pressure tested, and its ready to go...Jas

Hey Jas....I've seen one on ebay for $360 used & pressure checked ok...Boy, If I could convert these to my intention for closed cooling that would be great!.....We know how much the PPT & Monitor closed cooling kits cost...backordered & not available till spring.
I have twin 572 BBC's ....but before I jump in need to know how involved & labor intensive to build a system ....give me some confidence Jas!

Fwiw… I’m using factory Merc 454/502 coolers on my 600+ 509’s. My temps run right around 170-175 cruise and actually drops into the 160s when running harder. water temps upper 70’s to low 80’s.


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There was a post from way way back where member VinnyP modified his 575 sci to use a factory heat exchanger. His 575 had been breathed on so I figured would work on mine. So far so good. This is a half system (exhaust is still raw water).

Curious about the EGR cooler.

Tom that's a nice setup, fits in well & doesn't look like a sore eye.....That being said, we all know how expensive these closed cooling kits are especially for twins......for me, it's all about the money.
maybe I'm watching Bad Chad too much, but if a cooler a 1/4 of the price can do the same job (2 posts back Jas says, detroit dd15 coolers can handle 600* at a much high pressure) easily I'm looking
into it.
it.

Here you go. Just need to weld some feet on the bottom to screw it down, add an inlet and an out let for the engine coolant, and it's all done. This is very easy... Jas
https://cimg9.ibsrv.net/gimg/www.off...80c0a4dea5.jpg
Here it is with the ends ready to be welded on
https://cimg2.ibsrv.net/gimg/www.off...d82eb9d4d2.jpg

Picture is worth a 1000 W's ~ Jas, that is so cool!! ...A few questions, how did you disassemble the ends aren't they welded closed? .....and after cleaned tig welded close?
I'm sure there's a lot more involved, but let me keep asking, .The dd15 erg cooler pictured do you happen to know the model #?? ...I came across a Detroit diesel DD15 ERG
p/n A4731400175 - And another one p/n A4731400575......They look like yours, but don't know .....I give you the measurements in a couple if you don't mind.....thnx, Scippy

The dd15 erg cooler I'm looking at is ..32" long & 5"x 5" seems kinda large!

Serious question… If you’re welding up the ends, how do you take it apart to clean? Boiling and calling it good?

That's a Good question for ecuchips,, ... my question is how did he get the ends off? ....applied heat to a brazed or soldered end piece?...