Engine fan delete?

Topic: Engine fan delete? (Read 6525 times) previous topic - next topic

Re: Engine fan delete?

Reply #100 – July 28, 2022, 11:21:21 pm

I just buy a GM 100 amp one wire off eBay for 105$ .
Then engineer the bracket to fit . I am on my second as it hangs low and without the trailer stub, it's easy to knock it off on ramp driveways.
So now I leave a stub in all of the time .

Re: Engine fan delete?

Reply #101 – August 08, 2022, 12:57:40 pm

Pretty well done for now. The upper fans did the job well at initial testing without any control in the lower section of the radiator. Now that I've added the 4 7 in fans to evacuate that area , I'm sure that I've enough cooling for around 50-75% duty cycle. Plenty for Florida towing my small trailer.
I will continue to carry the metal fan to ensure proper karma .
It looks as tho I can also simply remove the 2 belts to de power the stock fan. As it is currently mounted , I may just do that and see how it works. Those belts are the first 2 and pretty easy to remove.

Re: Engine fan delete?

Reply #102 – August 08, 2022, 01:00:51 pm

I wound up cutting holes in the lower bumper with a plasma cutter .
Still not sure what to do with the engine door . It's amazing how much air it slows down . So much that heading north in the mountains , that simply opening the door , cooled it over 10 degrees.

Re: Engine fan delete?

Reply #103 – August 08, 2022, 01:23:44 pm

Speaking of engine doors, I'm still needing an engine door for a GV 102" wide. 96" coach engine door is too narrow.

Pierce

Re: Engine fan delete?

Reply #104 – August 08, 2022, 03:53:14 pm

Quote from: Protech Racing – August 08, 2022, 01:00:51 pm

I wound up cutting holes in the lower bumper with a plasma cutter .
Still not sure what to do with the engine door . It's amazing how much air it slows down . So much that heading north in the mountains , that simply opening the door , cooled it over 10 degrees.

Ive often thought that there would be a low pressure area behind the coach and any way you could offset that would improve cooling and economy. I think the holes would allow air to move towards the low pressure and help cool. The 320 has louvers in the rear door and im sure there is gains to be had by doing so. Opening the door pretty much proves that to me. I like 👍👍
Scott

Re: Engine fan delete?

Reply #105 – August 08, 2022, 04:59:57 pm

Scott, I think you're on to something there, would a deflector mounted at the rear of the roof help any ? I'm thinking of the wind deflectors mounted on station wagons and they were available for SUVs with the window in the tail gate.

Re: Engine fan delete?

Reply #106 – August 08, 2022, 05:03:46 pm

Quote from: Olde English – August 08, 2022, 04:59:57 pm

Scott, I think you're on to something there, would a deflector mounted at the rear of the roof help any ? I'm thinking of the wind deflectors mounted on station wagons and they were available for SUVs with the window in the tail gate.

NO, a deflector would DIMINISH the vacuum behind the coach.

Re: Engine fan delete?

Reply #107 – August 08, 2022, 05:12:56 pm

I have been thinking lately about the air intake for the engine air being where it is not the best
place for the best efficiency. We were loading up a standby generator and it was overheating so
I remove the lovers in front of the rad and problem solved.

Re: Engine fan delete?

Reply #108 – August 08, 2022, 05:20:24 pm

Careful here.

HUGE difference between side and rear radiator.

Rear radiator take air in from under the coach, after it has passed over the HOT transmission and engine.

Side radiators take air in from the side of the coach.

Re: Engine fan delete?

Reply #109 – August 08, 2022, 06:36:51 pm

Quote from: wolfe10 – August 08, 2022, 05:03:46 pm

NO, a deflector would DIMINISH the vacuum behind the coach.

No need to SHOUT Scott's thought was about addressing the low pressure area at the rear of the coach, a deflector does that or at least my wife assured me of such. She was the youngest and so relegated to the rear bench of their station wagon.
My own thought on the subject is that negative pressure behind the rear mounted radiator would benefit the out going air movement to some degree. IMHO

Re: Engine fan delete?

Reply #110 – August 08, 2022, 07:53:12 pm

Quote from: Olde English – August 08, 2022, 04:59:57 pm

Scott, I think you're on to something there, would a deflector mounted at the rear of the roof help any ? I'm thinking of the wind deflectors mounted on station wagons and they were available for SUVs with the window in the tail gate.

That was to try to keep the rear window clean

Re: Engine fan delete?

Reply #111 – August 08, 2022, 07:59:30 pm

Actually, the lower the pressure behind the coach, the less powerful the fan has to be to provide sufficient air flow through the CAC and radiator (again on rear radiator coaches).

Certainly if there is another objective, such as keeping the rear camera clean, a deflector will assist with that.

Re: Engine fan delete?

Reply #112 – August 08, 2022, 09:45:18 pm

Air flow test to come. My Son has a go pro and ribbon is in stock . Next time that we are both around , we'll take some video .

Re: Engine fan delete?

Reply #113 – August 08, 2022, 10:28:37 pm

A simple mono meter would show actual differential. Im pretty confident it exists with my background fan speed set so low and yet the coach still runs below fans sense temperature. Hopefully Ill prove to myself what is actually going on eventually. Peter I agree in regards to poor placement of inlet and I still feel that the stock inlet is undersized for the 450 ism. I can't show any improvements to the larger inlet grate but still believe it exists. This is also speed rated, if you drive faster its a bigger deal, slower not as much. Aerodynamics of a box kite.
Scott

Re: Engine fan delete?

Reply #114 – August 11, 2022, 11:58:26 am

4 of these under bumper ,; 2x 7" inch Universal Slim Fan Push Pull Electric Radiator Cooling 12V Mount...

2005 Escalade fan pack ; New Cooling Fan Assembly Chevy Avalanche Suburban Yukon Silverado 1500... I used autozone with better guarantee.

1 of these replacing the OE AC compressor; NEW CHROME STREET ROD GM HIGH OUTPUT ALTERNATOR FITS 1-ONE WIRE SELF...

3 of these. one for each big fan and one for the 4 smaller fans ;50A AMP Circuit Breaker Fuse Reset 12V-48V DC Car Boat Auto Waterproof...

Auto zone RL44 relay and RL 40 relay harness . 3 each , same as above .

Autozone fan control module , 3x each runs a fan pack . set at different temps ;https://www.autozone.com/cooling-heating-and-climate-control/engine-cooling-fan-module/p/compressor-works-engine-cooling-fan-module-733653/267187_0?rrec=true

Re: Engine fan delete?

Reply #115 – August 11, 2022, 12:00:24 pm

To be clear; This has not been retested in the mountains with the 4 added lower fans , holes in the bumper and the slimmed rear engine door slats .

Re: Engine fan delete?

Reply #116 – August 11, 2022, 02:04:14 pm

Mike, when you get it all done, how about some high resolution photos of the alternator changeover and the fans? A photo is worth a thousand...

Pierce

Re: Engine fan delete?

Reply #117 – August 18, 2022, 01:14:24 pm

Ran about 50 miles up the expressway ramps at WOT in the finished configuration. Never saw over 190 and with all the fans running , it stays under 190 easy.
The only tweaks will be to set the fan temps in better sequential ranges. Hard to do as when you stop and open the door to adjust them , the temp has come down already.
The modified door seems to pass enough airflow now.
Next big deal is to prettify the bus this fall . Paint and general beautification .
Foregot. Return trip with. OE metal fan ran at 9.2 mpg. So a solid 1.2 or more mpg increase on electric only.
Yeah. Prettify.

Re: Engine fan delete?

Reply #118 – August 18, 2022, 01:36:55 pm

Quote from: Protech Racing – August 18, 2022, 01:14:24 pm

Ran about 50 miles up the expressway ramps at WOT in the finished configuration. Never saw over 190 and with all the fans running , it stays under 190 easy.
The only tweaks will be to set the fan temps in better sequential ranges. Hard to do as when you stop and open the door to adjust them , the temp has come down already.
The modified door seems to pass enough airflow now.
Next big deal is to prettify the bus this fall . Paint and general beautification .
Yeah. Prettify.

Who is going to paint?

Re: Engine fan delete?

Reply #119 – August 18, 2022, 03:00:33 pm

I'll paint it at my shop.
Still removing po paint from bumpers.

Re: Engine fan delete?

Reply #120 – August 18, 2022, 04:24:21 pm

Quote from: Protech Racing – August 18, 2022, 03:00:33 pm

I'll paint it at my shop.
Still removing po paint from bumpers.

Still going to do stripes or one color? What type of paint are you going to use? I bought BASF paint for mine just havnt done it yet.

Re: Engine fan delete?

Reply #121 – August 18, 2022, 04:57:13 pm

2 part single stage .
White. Upper section wedge.
Teal or maybe blue lower section. Wife has the color chips .

Re: Engine fan delete?

Reply #122 – August 19, 2022, 11:33:45 am

Tweaks. I just ordered a larger alternator pully to slow it down a little and increase the belt wrap along with square inches of belt to pulley involvement .!I still get a little squeal when the fans and ac are running. This should solve that. Also noticed a 300 amp option in the same case GM 10 si ? That may run the ac all y itself if you kept it cool and can spin it cleanly .

Re: Engine fan delete?

Reply #123 – August 19, 2022, 04:31:02 pm

They make another version similar to the 10si except it is a larger frame and would produce more power yet not run as hot. The 10si can be made to produce more power but will heat saturate and shorten life. It will also like the slower speeds of a larger pulley because of its increased size. I looked a little but couldn't find a link. Same plug. I converted all my V belt drive vehicles over to them but have been running serpentine belt for years now. They exist and mount in same location possibly needing a longer adjustment arm and belt to clear the bigger case. Bigger is almost always better.

https://www.youtube.com/watch?v=-hAuaqXadMw
CS144 or CS130. May be others
Scott
BillaVista.com-Alternator Bible Tech Article by BillaVista

Re: Engine fan delete?

Reply #124 – August 19, 2022, 07:20:15 pm

I had a '63 Flexible that I was going to convert to a motorhome. I bought it in Portland Ore. It used ford starter motors for the heater blowers and had an oil cooled alternator. Sold it when I found the '81 FT.

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