electric fan
#26
I'm a boost creep...
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Originally Posted by Syonyk
Wayne also has one of the highest regular fuel efficiencies of anyone in the 2nd gen section...
...and I've seen other people reporting gains of 1-2mpg just from switching to an efan.
IN THEORY, the stock fan shouldn't be drawing significant amounts of power at highway speeds, but reality seems to argue...
I...just as the fact that higher cruising speeds seem to net better fuel economy, despite theory saying that's ridiculous.
I've also talked to several people who noticed that their engines would rev up faster without the stock fan.
#27
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It seems to me that if the e-fan is clutched and freewheels at high rpms it shouldn't have much effect on rev speed, even in neutral. However, if it does appreciably slow the engine in neutral it should also appreciably slow the car (an NA at least) a bit through 1st, which is mostly where autox'ers live.
I installed my e-fan at the same time I did a bunch of other changes, so I don't know how much of my gains are e-fan related. (I'll see if I can borrow another RSCC member's g-tech and do a few test runs with and without. I'll post whether or not there's a measurable difference.)
I still think it's awfully nice to be cruising down the street and hear nothing but engine...
I installed my e-fan at the same time I did a bunch of other changes, so I don't know how much of my gains are e-fan related. (I'll see if I can borrow another RSCC member's g-tech and do a few test runs with and without. I'll post whether or not there's a measurable difference.)
I still think it's awfully nice to be cruising down the street and hear nothing but engine...
#28
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Originally Posted by ScrapFC
...if it does appreciably slow the engine in neutral it should also appreciably slow the car (an NA at least) a bit through 1st...
I still think it's awfully nice to be cruising down the street and hear nothing but engine...
#29
spending too much money..
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is it the same for v8's and the like? It's funny because just about every mechanic I"ve talked to (doesn't mean I believe them or not) seems to always say. "Yep gettin rid of that there clutch fan and going to an electric fan will add horse power" I'm always like yeah whatever but after a while it's like if all these people think this then how can it not be true? And how the hell did this misconseption come about?
#30
Engine, Not Motor
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With some of the older V8 cars, it can be true. Many of them didn't use clutched fans, so the cooling fan actually did suck up quite a bit of power, especially in the higher RPM range. They were also very poor at cooling...
(Edit...Fix wording...)
(Edit...Fix wording...)
Last edited by Aaron Cake; 06-06-05 at 09:47 AM.
#32
Lives on the Forum
Damn, I come back after 4 days or so and you guys are still going at it...
To answer some of my critics, particularly NZ and J-Rat:
Sure, I could have wired a relay into the system, still could if I wanted to. After about 3 to 4 years with the e-fan, however, I'm to the point that I never forget to turn it on when it needs to come on. I don't trust cheapo auto parts store thermo switches, and if you do, it's only a matter of time that the trust you put in that switch is gonna bite you in the ***...
Fuel economy? Eh, maybe a little, if that. I didn't install it for economy OR horsepower gains, I installed it to clean up the engine bay and the fact that I knew I didn't need a fan running most of the time...
I didn't trust the 17 year old clutch on the stock fan, either...
Yes, NZ, I know how the thermoclutch works...I also know that they wear out over time
In conclusion, an e-fan with a simple switch works for me. It doesn't work for the majority of everyone else, though, and I am NOT suggesting that anybody follows my lead, only bringing to light that it can be done this way if you drive almost all highway...
And Rat, you run perfectly good cars into the wall, so it's kind of ironic you're judging my setups
To answer some of my critics, particularly NZ and J-Rat:
Sure, I could have wired a relay into the system, still could if I wanted to. After about 3 to 4 years with the e-fan, however, I'm to the point that I never forget to turn it on when it needs to come on. I don't trust cheapo auto parts store thermo switches, and if you do, it's only a matter of time that the trust you put in that switch is gonna bite you in the ***...
Fuel economy? Eh, maybe a little, if that. I didn't install it for economy OR horsepower gains, I installed it to clean up the engine bay and the fact that I knew I didn't need a fan running most of the time...
I didn't trust the 17 year old clutch on the stock fan, either...
Yes, NZ, I know how the thermoclutch works...I also know that they wear out over time
In conclusion, an e-fan with a simple switch works for me. It doesn't work for the majority of everyone else, though, and I am NOT suggesting that anybody follows my lead, only bringing to light that it can be done this way if you drive almost all highway...
And Rat, you run perfectly good cars into the wall, so it's kind of ironic you're judging my setups
#33
i recomend using a escort fan,you can cut it to fit the old shroud i have in picture, the benifits are you can see everything going on in your bay , does not help horsepower one bit it just makes easy to change belts and other items,mine does not drain the alt, because i have a thermo switch on it with a relay to set to your deired temp you just run the car when the temp gauge hits 1/4 you just turn the dial on the thermo then the fan kicks on it only kicks on at a certain temp,so you dont have to work your alt all the time ,then i have a override swicth on it just incase anthing fails . i run it all the time with the ac on with no problems dont use a efan if your not going to have a thermo switch,my car is a gxl t2 conversion ,please trust me on this put a thermo switch $17 at autozone,it very straight forward all you need aswell is a switch for inside the car and a relay , use heavy gauge wire,heres some pics,we are from waterbury ct.
#35
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Originally Posted by WAYNE88N/A
I don't trust cheapo auto parts store thermo switches, and if you do, it's only a matter of time that the trust you put in that switch is gonna bite you in the ***...
If/when my thermoclutch dies I'll most probably replace it with an e-fan purely for cost reasons. I won't use a thermoswitch though, instead I plan to use this adjustable voltage switch to operate the fan based on the thermosensor's voltage.
Last edited by NZConvertible; 06-07-05 at 02:47 AM.
#36
spending too much money..
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When I descide to bite the bullet and get an electric fan this is what I'm going to do. I think this diagram is by nz but it's easy to fallow and it gets rid of the fear of if your cheapo thermo switch fails because it's got an led that lights up if its running and a manual switch just incase it does fail! Very cool setup!
#37
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Originally Posted by NZConvertible
The terms "appreciably" and "a bit" mean exactly the opposite, so it's either one or the other. In this case it would be a bit, and a very small bit at that. The question should be whether it slows the car noticably. The only time it might do that is if the clutch was fully engaged, in which case an electric fan would be running too. We are still talking tiny increments of performance here, if any.
Originally Posted by NZConvertible
I can honestly say that between my exhaust and my stereo, I've never noticed any fan noise whilst driving the car.
#39
i realy recomend the autozone thermo switch my buddy had it in his car for 3 years without a problem, then i decided to put i have no problems i have a overide switch on it,all i do is start the car and go, very simple i dont put parts on my car untill i have seen the reliability first,$17 is cheap but it simply works,i dont now why it just works for all the 7s in waterbury ct,
#40
NorCal 7's Co-founder
I run a flex-a-lite black magic in my TII and love it. I have it run with a thermostatic switch to regulate itself, but I also have a manual control switch for when I AutoX or what have you. That couple with my Griffin aluminum rad works great to help keep engine temps down. I personally couldn't see spending the money it takes for a good e-fan if you are still using a stock rad.
On a side note, it's cool that there are other aircraft mechs in here. I'm an aircraft electrician for the AF. Needless to say, some other guys in the local 7 club like to ask me about wiring questions.
Zach
On a side note, it's cool that there are other aircraft mechs in here. I'm an aircraft electrician for the AF. Needless to say, some other guys in the local 7 club like to ask me about wiring questions.
Zach
#41
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I know this is really late and everything but thanx for letting me know all this stuff.. I was about to consider getting an e-fan but now that i know its best to replace the rad first then worry about the fan.. Since the stock fan can with stand up to 400 hrspwr anyway.. what's the point of upgrading now when i'm well below it in my N/A.. :-D
#45
Opinions are like........
You get what you pay for. A little more info on the fan like operating RPM and current draw would be nice. There aren't too many 2500cfm(measured how) 16" fans that cost $50 delivered.
#47
I just wanna hump my car.
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After reading 95% of what was said in this thread I know 2 things
1. NZ seems to know what he's talking about (I ain't f'n with him)
and
2. If your worried about fuel economy then you should be driving a prius and not a 7.
sorry just my 2 cents I ain't raggin on no one
1. NZ seems to know what he's talking about (I ain't f'n with him)
and
2. If your worried about fuel economy then you should be driving a prius and not a 7.
sorry just my 2 cents I ain't raggin on no one
#48
Rotary Powered Boobies
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Originally Posted by J-Rat
Yeah, there are different ways to measure fan output. My money says its an AutoZone special, not worth the time or money.
how about this
http://store.summitracing.com/defaul...&part=MRG-1988
#50
Opinions are like........
If you're on a budget, used OEM fans are your best bet. Use a tape measure and take some LxWxD measurements of your radiator space and go pick-ur-parting.
Find a ~16" efan off of a scrapped car at the salvage yard or ebay.
Find a ~16" efan off of a scrapped car at the salvage yard or ebay.