archemedes

there is no switch that can handle the draw even with the factory relay (that you bypass with the switch since you tap the main power feed to it) adding the manual fan switch to any car that's not raced is just stupid (especially if it has ac, since when the ac is on so are both fans)manual fans are for race cars so the fans are on when the key is off between rounds, so if you add them and don't race that's pretty ricerish (same as having a nitrous bottle that goes nowhere)

paarman97maro

I would say having a fan switch on a car that overheats easily isnt a stupid idea... Also I've seen several fan switches that dont have relays and have never had a problem.. are they all "lucky"?

archemedes

if the car overheats ity means something is broken so you are rigging something as a band aid, they may be lucky, but it's just like stereos systems there are people with no fuse on the main power to the amp, but the car never has a problem, but when you do, and the car is burnt to a crips wouldn't that $.97 investment sound genious?

Adric

His car doesnt even overheat... he just think it does..

JJhirsch

ok first of all alot of people do this to there cars because when they go to the track i have it in my car 94 mustang gt. all it does it runs the fans like normal if the switch is off and when it is on the fans get full power (it isnt an on and off switch to the power of the fan.) it is a bypass to the relay ground in the cars fan already that came with the car factory.

and u dont tap the main power u are taping the power to the switch to the realy drrrr

paarman97maro

.97 for a relay? the one I "need" was way more than that

paarman97maro

I never said my car, I was giving an example

archemedes

retail on a relay is $1.97 (that's the bosche style)

archemedes

then that's not a manual fan control it's a bypass, manual means you can also shut them off when you want, and it does nothing on a street car at the track (your waiting in staging long enough the engine will cool, and most guys are running too cold to start with)my drag car has a thermostat (I don't want the fans running as I want as much battery power as I can get, that's why I have a cool can that I cna add ice to)We found that we want the engine between 185 and 195 at launch for best times (which is also what the pro stock cars shoot for) fuel injected cars are supposed to make more power at a lower temp, but it is just running rich, and I see alot of them with 160* t stats go slower than a bone stock car (which I always laugh at)

JJhirsch

ok i do go to the track sorry to say but the colder ur motor the better when it is 80 out u want to run the fans as much as u can to cool befor ur get on the track. (battery power has nothing to do with going faster) i go with alot of people who have draged there cars for 3 year and have always put ice on there intakes to make there car run colder.

archemedes

I have gone to the track for about 25 years now, battery voltage makes a huge difference (you get more spark at 16 volts than 12 volts, that's why race batteries are all higher voltage) if you do a little research you'd find a few books from real experts that show the internal cumbustion engine makes the most power at a certain temp, the icing of the intake is to get the temp down just below that so when you get to the line you asre at optimal temp (I see a bunch of young guys at the track screw that up, and go slow for their combo)

JJhirsch

batter dosnt matter!!!! ur alt. chargers ur car my car is just as fast if it was running right now with out a batter and just running off an alt.

and just so u know iceing the intake got my friend from 15.1 to 14.9

paarman97maro

what kind of car do you drag arch?

archemedes

a '79 cutlass(currently a small block, but has had an olds 455 at one time that didn't like pistons), the alternator on a drag car is non existant (it eats horsepower) and a modern car (especially a gm) won't run without a battery, teh alternator can't keep up (not to mention they are designed to shut off if ther batteery drops below 12 volts)

JJhirsch

go back to school and learn ur cars drag cars like mustang camaros have alt.

and i dont know if u knwo this but to test ur alt to see if ti is not working u start ur car and disconect the - to the batter and it will still run.