Engine fan delete?

Topic: Engine fan delete? (Read 6523 times) previous topic - next topic

Re: Engine fan delete?

Reply #25 – December 11, 2021, 11:56:59 am

Quote from: nitehawk – December 11, 2021, 11:55:37 am

Pierce, something weird here (besides me) because I never know when our two big electric fans on our rear radiator are on. I go back there to disconnect our towed and both fans are running but nothing shows on the gauges.

Has Rocket been pushing switches again???

Re: Engine fan delete?

Reply #26 – December 11, 2021, 12:08:56 pm

For some reason he was trying to prevent me from typing that post.

Re: Engine fan delete?

Reply #27 – December 11, 2021, 03:26:12 pm

Wouldn't the redirection of air flow be the better solution.

While side mounts make for better engine access than rear mounted. Both designs are lacking in taking advantage of forward motion air flow. But of course redirecting that air flow is much more involved and problematic.

Re: Engine fan delete?

Reply #28 – December 11, 2021, 04:09:58 pm

Rear mounted blows hot air into the radiator. My brother couldn't keep his HR with the C-7 from overheating on the Sherman grade north of Bishop. Sold it and bought a side radiator Monaco no overheating issue.

Re: Engine fan delete?

Reply #29 – December 12, 2021, 08:06:12 am

Quote from: Protech Racing – December 11, 2021, 10:10:28 am

Do you have links ?

No but these are the forums that have had the most extensive discussions:

BCM Community - Index
BNO BBS - BNO's Bulletin Board System - Index
Wanderlodge Owners Group - Powered by vBulletin

Just do a search for electric fans. You may have to join one or more to read the posts. All of them used to be open to everybody but hackers fixed that.

Additional electric fan info: The generators on Wanderlodges originally had massive 240V squirrel cage cooling fans. People have been very successful at replacing them with 12V Tstat operated automotive type fans.

TOM

Re: Engine fan delete?

Reply #30 – December 12, 2021, 03:27:00 pm

What is the cfm of the fans we have on our coaches (1999--320 / 450 cummins) and what is needed in hot weather to keep everything cooled properly?
Chris

Re: Engine fan delete?

Reply #31 – December 12, 2021, 04:08:05 pm

Quote from: nitehawk – December 11, 2021, 11:55:37 am

Pierce, something weird here (besides me) because I never know when our two big electric fans on our rear radiator are on. I go back there to disconnect our towed and both fans are running but nothing shows on the gauges.

Hawk. Do you mean no changes on the amp meter gage ?

Re: Engine fan delete?

Reply #32 – December 12, 2021, 05:16:59 pm

Perhaps they are on a direct battery connection, bypassing the ammeter. A voltmeter will tell the tale as it will drop when the fans are on. If the fans are on when you check the toad, they should eventually go off as the engine temp goes down.

Pierce

Re: Engine fan delete?

Reply #33 – December 12, 2021, 05:41:07 pm

Well, ain't gonna know 'til spring when we bring the coach home.

Re: Engine fan delete?

Reply #34 – December 12, 2021, 10:31:48 pm

Quote from: Chris m lang – December 12, 2021, 03:27:00 pm

What is the cfm of the fans we have on our coaches (1999--320 / 450 cummins) and what is needed in hot weather to keep everything cooled properly?
Chris

GEAR DOWN, Even though most think that lugging along at low revs is what a diesel is about. Well it isn't. So many look at the diesel engines RPM through the experience of their family cars petrol engine. The M11 operates at around 1400 RPM at 62 MPH and folks see this as a very low RPM. It isn't. Our M11's are limited to around 2000 RPM so 1400-1700 RPM is more than two thirds of the max allowed RPM. So do not let your M11 lug up a hill at 1100RPM in econ mode set on 6 and max psi turbo boost. This will have your engine hotter than a branding iron. So slow down and push that down arrow and keep the revs at 1600-1700 and keep your foot from pushing the go pedal to the floor.

So driving your gas powered car like a diesel would have you at 4,000 RPM if it has a 6,500 RPM redline.

Re: Engine fan delete?

Reply #35 – December 12, 2021, 10:46:51 pm

The M11 is governed at 2100. Last summer I was driving up a grade and I noticed
the engine temperature was at 200 degrees, shifted down one gear and the temperature
dropped back down quickly and the fans were still on slow speed.

Re: Engine fan delete?

Reply #36 – December 13, 2021, 04:04:59 pm

Quote from: Chris m lang – December 12, 2021, 03:27:00 pm

What is the cfm of the fans we have on our coaches (1999--320 / 450 cummins) and what is needed in hot weather to keep everything cooled properly?
Chris

So this was for a 10k cfm fans that is rated for 450 HP and it is drawing 70 amps at 12v dc. Don't know if you would need 2.
Turbine Electric Fans for Over-the-Road Trucks and Tractors

Re: Engine fan delete?

Reply #37 – December 13, 2021, 06:05:31 pm

The link to the fans shows a front engine requirement for the number of fans. The side radiator is going to need more. The intercooler is also not considered.

Pierce

Re: Engine fan delete?

Reply #38 – December 14, 2021, 01:10:37 pm

Doing some poking around as I gather parts. 20-25% of my Radiator face directly at the bumper.
My 4 14 in fans showed up and waiting on the controllers for them, as well as some customer stuff to go away.

Re: Engine fan delete?

Reply #39 – January 02, 2022, 11:00:18 am

Just ran across this video and thought I'd share on this thread. This guy replaced his stock fan with 2005-2007 Chevy Suburban fans. A quick search shows each 2-fan setup is rated for about 10k CFM, so this setup is about 20k CFM.

http://youtu.be/w2osb-GaKgM

Re: Engine fan delete?

Reply #40 – January 02, 2022, 11:06:12 am

Quote from: WS6_Keith – January 02, 2022, 11:00:18 am

Just ran across this video and thought I'd share on this thread. This guy replaced his stock fan with 2005-2007 Chevy Suburban fans. A quick search shows each 2-fan setup is rated for about 10k CFM, so this setup is about 20k CFM.

http://youtu.be/w2osb-GaKgM

Yes, a very good coverage of the conversion.

But (OK large BUT) much of the "heat rejection" needed depends on engine size and HP. We already have folks on this thread with HP ranging from 225 to 450. Very different requirements.

Also, even if coolant temperature is 50* F, you still need some air flow through the CAC to keep intake manifold temperatures in the proper range.

It absolutely CAN be done, but will also include an alternator upgrade/addition and some careful engineering.

Re: Engine fan delete?

Reply #41 – January 02, 2022, 11:44:13 am

Just a note for those contemplating doing an electric fan installation.
Years ago a friend was having grief from his stock car overheating. He called me over and explained he had tried 4, 6, & 8 bladed fans and a shroud and the engine still overheated.
I took one look and told him I work cheap but not free, so he would have to get a six pack of Pabst and we would drink three bottles apiece and then I would tell him what was wrong with his setup.
After imbibing I showed him what was wrong, by opening the hood on my 1957 Chev convertible with the 301 engine.
Problem? His fan blades were almost touching the radiator. Cavitation, oh boy! We took out the spacer between the fan and the mounting flange on the water pump and he ended up running the rest of the stock car season at Rockford Speedway without overheating.
So, if contemplating an electric fan conversion, either side or rear radiator, determine optimum spacing between the fan and the radiator for the air flow.

Re: Engine fan delete?

Reply #42 – January 02, 2022, 12:01:13 pm

When the fan is any distance away from the radiator a shroud is needed to get optimum cooling.

Re: Engine fan delete?

Reply #43 – January 02, 2022, 12:16:09 pm

Quote from: wolfe10 – January 02, 2022, 11:06:12 am

But (OK large BUT) much of the "heat rejection" needed depends on engine size and HP. We already have folks on this thread with HP ranging from 225 to 450. Very different requirements.

This guy says his Cat 3126B is 330HP.n Apparently he just finished the install and will make another video after his first trip, which is soon. Just something for those interested, to be aware of.

Re: Engine fan delete?

Reply #44 – January 02, 2022, 12:22:39 pm

Quote from: WS6_Keith – January 02, 2022, 12:16:09 pm

This guy says his Cat 3126B is 330HP.n Apparently he just finished the install and will make another video after his first trip, which is soon. Just something for those interested, to be aware of.

Yes, link to current discussion: Electric Cooling Fan Conversion - 2000 Endeavor DP - Page 3 - iRV2 Forums

Re: Engine fan delete?

Reply #45 – January 03, 2022, 02:33:36 pm

Looks like he likes it and it cools fine when set up correctly. His fuel consumption has dropped more than I expect mine to .
He's using some sort of variable fan power supply . My controllers are on /off. I have 2 sets of 2 fans set to different temps. I hope to get everything installed next week .
The fans mount right up tight to the radiator , just like a car.

Re: Engine fan delete?

Reply #46 – January 03, 2022, 02:37:26 pm

Looking forward to his report after running in summer temperatures on grades.

Doesn't take nearly as much cooling in cold temperatures.

Re: Engine fan delete?

Reply #47 – January 03, 2022, 03:11:41 pm

I run in Florida . Any issues will be readily apparent .

Re: Engine fan delete?

Reply #48 – January 18, 2022, 08:39:06 pm

Constants | Gas | Diesel
SFC: .50 lb. per HP | .40 lb. per HP
FSW: 6.1 lb. per gal. | 7.2 lb per gal.

Calculating Boat Fuel Consumption | Boating Mag.

Quick math is about 1.6 gal per hr. at 30HP .
Found some data . On demand cooling should save quite a bit of fuel . Running the metal direct drive fan 100% of the time cost fuel.
Running the electric fans only when needed might be optimal. I fully understand that full power cooling load will still require the same power .
I hope to get the fans mounted by the end of the week.

Re: Engine fan delete?

Reply #49 – January 18, 2022, 10:23:27 pm

Interesting idea. I talked to another Foretraveler earlier this week about replacing the hydraulic fans with electric ones. I'm assuming that Foretravel checked into that idea when they were designing the coaches and decided that the hydraulic route was the better one.

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