jrsavoie
Recruit
Has anybody TRIED AN ELECTRIC FAN SET UP IN A 6.5? i NEVER FOUND ANYTHING sEARCHING
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Has anybody TRIED AN ELECTRIC FAN SET UP IN A 6.5? i NEVER FOUND ANYTHING sEARCHING
- Thread starter jrsavoie
- Start date
Ran across a note in a electric fan catalog something to the effect: 'Electric fans not recommended as IDI CFM requirements are too high.'
From my own experiments a 10,000 CFM Trailblazer SS clutch fan I tried isn't enough CFM and I obtained that rating with the hood closed and radiators in place. Electric fans are rated freestanding with none of these restrictions and struggle to get 5000 CFM with a pair of fans taking near 100 amps. I never measured the Duramax or steel 9 blade diesel fans, however, the diesel fans kept me cool with the AC on on a specific grade to Camp Verde that the tested fan got the engine hot with the heater on high AC off.
You could look at what the new ram 1/2 ton diesel is using for electric fans, but, already stories of them running hot out there.
From my own experiments a 10,000 CFM Trailblazer SS clutch fan I tried isn't enough CFM and I obtained that rating with the hood closed and radiators in place. Electric fans are rated freestanding with none of these restrictions and struggle to get 5000 CFM with a pair of fans taking near 100 amps. I never measured the Duramax or steel 9 blade diesel fans, however, the diesel fans kept me cool with the AC on on a specific grade to Camp Verde that the tested fan got the engine hot with the heater on high AC off.
You could look at what the new ram 1/2 ton diesel is using for electric fans, but, already stories of them running hot out there.
Big T
Well-Known Member
Isn't this Tahoe rigged with electric fans? Says twin Flex a light fans:
http://www.thetruckstop.us/forum/showthread.php?42828-Should-I-sell-my-6-5-Diesel-Tahoe
Knowing what others have experienced with electric fans, I saw these as a negative on this vehicle, but easily correctable.
http://www.thetruckstop.us/forum/showthread.php?42828-Should-I-sell-my-6-5-Diesel-Tahoe
Knowing what others have experienced with electric fans, I saw these as a negative on this vehicle, but easily correctable.
Are you guys talking about electric in place of the stock mechanical or in conjunction with them?
My motorhome has both. The electric one looks just like the one I bought from that place in Buffalo to use on my K2500, that is still in the box.
My motorhome has both. The electric one looks just like the one I bought from that place in Buffalo to use on my K2500, that is still in the box.
The electrics like on the Tahoe are an automotive trade off. You limit what the vehicle can do in this case by the cooling system. If you never reach the limits of electric fans it is worth it. Cooling system includes AC and the design limit of bad natural airflow through the cooling stack our body style has. The lift his has can change airflow for better or worse.
Location and hottest summer temp have a lot to do with where the limits are. Specifically CFM of the hotter air going through the stack needed to keep it cool while AC demand goes up.
At idle the electrics may have an edge on AC performance. My 350 Yukon did. The V8 Trailblazers would loose AC performance at idle with electrics. At 1200 engine RPM it's all over for electric fans as the clutch fan walks away for CFM numbers. Walks away for HP needed as well. Myself I will trade the HP for cooling and ice cold AC.
The Yukon also had to be towed twice in one summer because the POS Permacool electric fan kit burned up motors. I wound up with a pusher fan wired to the ac clutch and a stock fan with AC Delco clutch. This was before cooling fan clutch mods were a known trick to me. Flex fan I tried was loud and not enough...
Location and hottest summer temp have a lot to do with where the limits are. Specifically CFM of the hotter air going through the stack needed to keep it cool while AC demand goes up.
At idle the electrics may have an edge on AC performance. My 350 Yukon did. The V8 Trailblazers would loose AC performance at idle with electrics. At 1200 engine RPM it's all over for electric fans as the clutch fan walks away for CFM numbers. Walks away for HP needed as well. Myself I will trade the HP for cooling and ice cold AC.
The Yukon also had to be towed twice in one summer because the POS Permacool electric fan kit burned up motors. I wound up with a pusher fan wired to the ac clutch and a stock fan with AC Delco clutch. This was before cooling fan clutch mods were a known trick to me. Flex fan I tried was loud and not enough...
JMJNet
Recruit
Search at DP, you will find a few.
IIRC, oil_pan did it which work when he was living in colder climate area but when he moved south, it never catch up.
IIRC, oil_pan did it which work when he was living in colder climate area but when he moved south, it never catch up.
JiFaire
Land Mine Finder
Electric fans do not work with any load at all, or at elevation. Been tried over and over. At idle, in traffic, AC on, different story. Some guys have tried them in conjunction with mechanical, with mixed results... Some good, some not so much.
JayTheCPA
Well-Known Member
My ideal is to mod the grill to allow the e-pusher up front primarily for the A/C (as WarWagon mentions) and then do either a Hayden (electric) or Hummer (hydraulic) that mounts to the water pump. If the truck does not have A/C, then just a motor mounted puller should work.
Right now I am on the first step toward the pusher / puller setup as I just modified the fan to a 02 DMax fan and water pump that takes a spin-on clutch.
Next steps on the path are to figure out what controller I want to use for the pusher setup as they look like they will need to mount inside the cab to stay away from heat and moisture.
Right now I am on the first step toward the pusher / puller setup as I just modified the fan to a 02 DMax fan and water pump that takes a spin-on clutch.
Next steps on the path are to figure out what controller I want to use for the pusher setup as they look like they will need to mount inside the cab to stay away from heat and moisture.
Husker6.5
135' diagonal 16:9HD, 25KW sound!
Flexalite makes a dual puller with shroud 5500 CFM unit for a Duramax. While in theory it should fit the 6.5 radiator (as the cores are the same), the IDI 6.5 introduces much more heat into the cooling system than the 6.6 DI Duramax does and for other than light duty city driving without A/C or highway cruising in a moderate climate, I personally would not use electric fans as the primary source of airflow through the radiator stack.
A couple of years back DieselPower did an article where they replaced the stock fan on a 5.9L Cummins with a Flexalite electric unit. While they did gain about 30hp by eliminating fan drag and picked up about 2mpg, but IIRC they also said they'd only use on a stock engine and normal light driving conditions. There are also diesel drag racers who use electric fans to gain hp and reduce engine drag, but they use them after the run is over to dump heat out of the system and avoid heat soak between runs.
There is no such thing as free energy. IF you could find a pair of puller/pusher fans that could move 10,000 CFM there is the amp load that the alternator would have to compensate for, and it takes horsepower to turn the alternator. True, they draw from the battery (an energy storage device that uses electrochemical potential to store energy), but that electrochemical potential is restored when the alternator kicks in and recharges the battery and when the windings in the alternator energizes, it takes hp to turn the stator to create the magnetic field disturbance that then excites the electrons that then flow and recharge the battery. But I digress.
Personally, as appealing as it seems, I would not use electric fans as the primary source of airflow through the radiator stack on a 6.5, even a stock one, that sees normal daily driving with A/C on in the summer in stop and go city traffic, any sort of grades or towing on highway, etc. In a show vehicle that sees limited run time, yes. A daily driver, no.
A couple of years back DieselPower did an article where they replaced the stock fan on a 5.9L Cummins with a Flexalite electric unit. While they did gain about 30hp by eliminating fan drag and picked up about 2mpg, but IIRC they also said they'd only use on a stock engine and normal light driving conditions. There are also diesel drag racers who use electric fans to gain hp and reduce engine drag, but they use them after the run is over to dump heat out of the system and avoid heat soak between runs.
There is no such thing as free energy. IF you could find a pair of puller/pusher fans that could move 10,000 CFM there is the amp load that the alternator would have to compensate for, and it takes horsepower to turn the alternator. True, they draw from the battery (an energy storage device that uses electrochemical potential to store energy), but that electrochemical potential is restored when the alternator kicks in and recharges the battery and when the windings in the alternator energizes, it takes hp to turn the stator to create the magnetic field disturbance that then excites the electrons that then flow and recharge the battery. But I digress.
Personally, as appealing as it seems, I would not use electric fans as the primary source of airflow through the radiator stack on a 6.5, even a stock one, that sees normal daily driving with A/C on in the summer in stop and go city traffic, any sort of grades or towing on highway, etc. In a show vehicle that sees limited run time, yes. A daily driver, no.