Jump to content
SAU Community

Replacing The Radiator Fan With Electric Fans. Performance Benifit?

vidospace

By vidospace,
in Engines & Forced Induction

 Share

Recommended Posts

vidospace Mentor

vidospace

Posted
Posted

I was servicing the car yesterday and saw that the radiator fan is basically on all the time, even though it has a clutch to allow it to spin separatetly to the other belts/pulleys on the engine. It got me to thinking how much power is it acutally taking away from the engine? I assume it could be as much as say the AC compressor? But at the same time I have seen some hardcore RBs with the stock fan in place?

  • Replies 69
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

juggernaut1
juggernaut1

40 amp current draw ....strewth....throw those in the bin. Also problem with the Davies Craig fans is that they don't draw air through the entire radiator due to the lack of a proper shroud. Look at t

wannaslide Contributor

wannaslide

Posted
Posted
i took mine off and replaced with thermo fans...massive reposonse difference....

so do you really get a response differece that is noticeable cos im after more response

frozenwaffles Mentor

frozenwaffles

Posted
Posted

its jujst got heaps more throttle response... i havent dyno

ed the difference but you can notice it alot when you take your car for the first drive without the fan...

Ultimategtr Proficient

Ultimategtr

Posted
Posted

a bit off topic here but my dads old rd28, we ran it without the thermo fan for a lil while and it seemed to rev alot easier. more responsive, even tho it was diesel.

Iv heard that the gains are offset by the power electric fans use, so go figure. Of course i dont have dyno sheets to prove but only for 2-4 kw its not worth it imo.

Turbo Dave Collaborator

Turbo Dave

Posted
Posted (edited)

This would help me clear my cooler pipe a little easier, any pics? and what sort or thermostat would you use? ECU controlled or manual thermostat?

Edited by Turbo Dave
Bliksem Veteran

Bliksem

Posted
Posted (edited)
ECU controlled or manual thermostat?

You could go either, depending on what ECU you have. There are also thermo fan controllers from Billion, Power Enterprise, davies craig, Pivot etc.

A mate made a circuit for me that I havent gotten around to fitting yet, it just used a pikaxe chip that can be reprogammed.

Edited by MintR33
Jet 20 Enthusiast

Jet 20

Posted
Posted

when the thermo fans are running it will load up the alternator more causing a drain on the engines power, the question is how does this engine power drain compare with the standard fan??

when the thermo's are not running the engine will have better response compared to the standard fan cos the standard fan never fully disengages so to speak.

zoom Community Regular

zoom

Posted
Posted

I remember about 5 years ago when i installed the thermo fan and electric water pumps, the engine revs seemed to be quicker. You can actually notice the car pull harder particularly from mid to high revs. Both the fan and pump have their own controll. You can controll whatever temperature you want.

The down sides are:

1. when the fan activated the alternator will kick in which may cause your engine to hunt for about 10 seconds (this will happens particularly in the traffic and hot day.

2. if the fan died, than your engine will be running to hot. (i haven't had any problem since i installed 5 years ago). :cheers: .

Just have to keep your eyes on the water temp.

carter Enthusiast

carter

Posted
Posted

ive got thermos on my 25 in my cefiro. im running 2x 10'' atm mite get 2x12'' 2 keep it cooler again. ive got it set up2 a switch that has a temp sensor that goes in the top hose wen u hook it upto the radiator, wen my motors usually on i just turn it down to the lowest temp so its always on. ive got a pic 4 u all 2 c as well.

DSCF0688.jpg

blind_elk Grand Master

blind_elk

Posted
Posted

My experience was that I couldn't get air to flow through the radiator, thus making it easy for the engine to overheat. Even on the highway, a slight uphill gradient increased the load enough that the thermo would turn on.

Also, the A/c radiator relies on the standard fan for some cooling.

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted
when its cold it is more like free wheeling like you can stop it with your hand and hold it (not very smart but do-able)

i did that on my old ca20 blue bird when i was 17... it put a big cut in my palm and you could see raw flesh in there.. i went white lol... to this day i still have the scar.

So yes not very smart

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • V35_Paul
      Rv37 400r questions

      By V35_Paul · Posted

      A locally delivered Infiniti have remote start installed but don't come with the remote start key. You need a new remote start key and they just need it programed. And this is different to making/programing a new key that just starts the car.  
    • Lithium
      Shoota's R33 GT-R RB30/26

      By Lithium · Posted

      Cheers, and cheers for sharing so much of the build and also sharing the glimpse of what turns out to bring a lot of us poor decision makers together haha.  I do recommend learning more about how to manage it, if not considering getting a  formal diagnosis.  The discussion with the psychiatrist I got my diagnosis through was quite eye opening, things I'd not even considered to be ADHD related and hadn't mentioned were things she asked about out of the blue and were common themes with people with my flavour of ADHD.   It's not a label for people who are hyperactive and ill-attentive, there's more to it than that and some of it can be much more challenging or damaging - though there are of course two sides to the thing, and a lot of the stuff we have to go through and work on to live with it make us effectively "better" at other things as well. Aside from the fact that there is some argument I could have a bit of ASD seasoning in there (came up during the diagnosis, and neurodiverse things seem to not stay as a cookie cut) I suspect you need to learn more about ADHD if you are puzzled about how hyperfocus could possibly apply.  I *do* personally use "superpower" with quotes deliberately, but it's 100% an ADHD thing due to the exact reason that lack of focus is also an ADHD thing... Loosely speaking the inattentive side of ADHD isn't the inability to focus, it's the inability to control where the focus goes.  Not being able to sleep because brain is more interested in thinking about a stupid thing I said to a girl I liked 30 years ago, not being able to focus on work because my brain is more keen on putting together the torque management strategy we're going to try out with a drag car next weekend, not being able to focus on a conversation with someone I WANT to listen to and respect because there is a flickering light in my peripheral vision.    If I could just stop work and build the torque management setup right there and then I'd not hear anything else until it was done.  
    • Shoota_77
      Shoota's R33 GT-R RB30/26

      By Shoota_77 · Posted

      Maybe you should do some more reading.  Google positive effects of ADHD and you'll get your answers.  One of my personal downsides of ADHD has been talking before I think.   Maybe you have it too?
    • GTSBoy
      Shoota's R33 GT-R RB30/26

      By GTSBoy · Posted

      Excuse me for butting in....but which part of ADHD can be considered a superpower? I would have though it far more likely that some ASD comorbidity is more likely to be contributing to an ability to hyperfocus on something. ADHD being aimed somewhat in the other direction. My shed looks like your shed. My whiteboard list of unfinished projects has entries going back 15 years. I know what you're talking about - I just struggle to connect ADHD to the results being discussed.
    • Shoota_77
      Shoota's R33 GT-R RB30/26

      By Shoota_77 · Posted

      Thanks for reaching out!  It's a blessing and a curse at the same time.  I'm undiagnosed but it doesn't take a rocket scientist to see it in me... I have more half started projects laying around my house, shed, garden, etc taking up space and money, destroying aesthetics than if I added up all of my mates projects together. But, ADHD gives me the ability to hyper focus on things that no mere mortal could even  comprehend.  A recent pool build is an example of that....  I dont know anyone else that would be dumb enough and focused enough to take on then complete something of that magnitude. I call ADHD a superpower but it can equally be completely destructive if not controlled and focusedon the right places. Addiction is a major concern to ADHD people and thankfully my addictions have been no worse than projects, XBOX, chocolate and being an arsehole! It's often hereditary and my 13 year old son is currently learning how to drive it at the moment. Keep lurking! If i can finally finish this bloody thing at some point it will be a win for all of us ADHD'ers! 🤪
×
×
  • Create New...