Turborl7

Guys I had my fans rigged to go on all the time, my car runs very cool all the time. But what are the negative affects, I was gonna have the PFC control the fans. Anybody else runs their fans all the time?

vudoodoodoo

Wearing out the fan motors? Idunno...

rynberg

Yes, it is bad. You can run the car TOO cool, especially in colder weather. The engine will run it's best in the 180-200 F range. If you are at 170 F or below, the engine control system will run in warm-up mode -- double throttle plates not opening, enrichened fuel mixture, etc. That and you are just putting needless wear on the fans.

If you have a PFC and the data-logit, you can set exactly when your fans come on. I think many people have their low fans come on at around 190F (88 C) instead of the factory setting of 220F (!).

DamonB

There is absolutely no reason to run the temp less than about 180. I won't even run the car hard until it hits 180 and I like to see 200 when pulling hard.

adam c

iTrader: (2)

I wouldn't run them under about 195.

HeatTreated

Man, my car runs very cold. *linearized temp gauge and rarely do I see 170' F on heavy city driving. Is my stock replacement radiator and water wetter working that good?
*plus any downside to running the fan while cruising 65+mph on the highway? Reason I ask is, I wonder if it impedes with airflow going through the radiator since air is being throw at it from both sides.

DamonB

The radiator fans pull, so they are in fact not fighting the incoming air.

With the linearized temp gauge how do you have an actual temp reading? If you are in fact running no more than 170 degrees you can just remove your radiator completely as the thermostat isn't even open yet

If your temps are in fact that low, they are too low. The engine would be happier with more temp in it.

HeatTreated

gotcha.
As for the temps.. The ohms were set that the middle of the gauge would read 180'F Ive gove above it only a few times and always hang way below. Ive gone so far as to attach a 'cooking' thermometer to the radiator hose to compare and it read the same as what the guage would show. You think my thermostat is bad (stuck open)?

adam c

iTrader: (2)

There is NO possibility that your car will stay at 170 sitting in heavy city traffic. Even if your thermostat is stuck open the car will get up to a minumum of 210 unless the fans come on.

If your fans are not coming on, your temp readings are wrong.

Adam

HeatTreated

thens thats it.. the markings for the gauge are set wrong... hmm perhaps I can sit there until the fans come on and note the mark.. Since I know when the fans are set to come on.

adam c

iTrader: (2)

Do you know when they come on, or when they are supposed to come on??

I have a 94 white PEG. My fans were not coming on when they were supposed to. The car was getting really hot. I didn't even know it until I installed my VDO temp gauge. Now I have things under control.

adam c

iTrader: (2)

Do you know when they come on, or when they are supposed to come on??

I have a 94 white PEG. My fans were not coming on when they were supposed to. The car was getting really hot. I didn't even know it until I installed my VDO temp gauge. Now I have things under control (I think).

sorry for the double post

T88NosRx7

iTrader: (1)

I think it depends on your mods and where you live, and also how you drive. If you hardly ever get on the gas and only have very basic mod, yeah, its bad to turn the fans on all the time, but if you are heavily modded, and run the **** out of your car, you should consider having the fans on all the time.

adam c

iTrader: (2)

Wrong.

The only reason to run the fans is to cool the car. Even if you are heavily modded, you don't need (or want) the fans on during warm up, or when driving normally at freeway speeds.

Snook

iTrader: (12)

I run my fans on high power every second that the car is on

Daniel577h

bad

skunks

i run mines all the time on low when the car is on and oh high when i cool down after a hard run.

Snook

iTrader: (12)

No, not bad.
My car is always at 183 degrees and when I run it hard it goes up to 195 or so and comes back down to 183 quickly.

Explain why this is bad please. I was trying to keep the car in great shape not hurt it.

gotorx7

I've got my Fan Mod on a switch.

I let the car warm up without the fans, then when I hit (what I consider to be) operating temp - about 180 - I turn the fans on, which maintains that temp very nicely.

And of course I always let them run for the 10 minutes after I shut off.

Only downside is if the car is going to be parked for a while, I have to go back and turn the switch off later, so as not to drain the battery.

gotorx7

I've got my Fan Mod on a switch.

I let the car warm up without the fans, then when I hit (what I consider to be) operating temp - about 180 - I turn the fans on, which maintains that temp very nicely.

And of course I always let them run for the 10 minutes after I shut off.

Only downside is if the car is going to be parked for a while, I have to go back and turn the switch off later, so as not to drain the battery.

T88NosRx7

iTrader: (1)

it isn't bad, ive done it every mile for the last 15k, maybe the fans might have more wear on them, but i'd rather replace that. Don't listen to adam c.

BATMAN

hmm any info on the Fan mod..
i want to do this to my car.. ..
but a friend of mine who keeps saying
he will help me . cuz he knows how to do it )
.always lies to me so.. any links to this would be appricated.

ttb

fan mod...search and you'll get tons of how to's

here one to start

http://rx7.voodoobox.net/

twinturborx7pete

iTrader: (3)

My car usually stays around 86-88C on the PFC in heavy traffic and when i get on it, it might jump up to 90C, but rarely... usually stays in the 86-88C range.