Of course, not everyone's dryer at home is like this....



On the outside of my old house, the dryer vent had a flapper-style pressure-controlled venting system. It was very simple: some rectangular pieces hung on rods (long ways was parallel to the ground) and the pressure from the dryer venting would allow them to open enough to let air/debris out, but they would shut when the dryer was off. Simple enough idea, right?



Well, I was thinking something like this might work for an e-fan radiator shroud. The biggest problem with them is the fact that because they're so shallow, the best area of cooling is right around where the fan is, and even that area becomes an issue when moving because the fan isn't turning anymore; it's just creating resistance.



My idea is to apply that to the area around the shroud outside of the fan area. When stopped (ie: fan running) the pressure from the fan would keep the vents closed and would allow them to open freely when the car was moving. Or, if you don't think that you'd create enough pressure from incoming air while moving, have a mechanical/electromagnetic setup to open/close the "blinds." Seems like this would be ideal for air movement at higher speeds....



Oh, and I think this would work great for the e-fans that are mounted in front of the radiator, where you have all the factors of heat, etc, working against you, trying to pull in air from the outside, unless you make it a pull fan instead of push.



Ok...I've got my helmet on, I'm ready for the bashing. :-)

Its Been Done ! ! ! They use rubber flapper doors dont remember where i saw it.

yea, they even come like that on bone stock cars nowadays



kevin.

dammit, why do i always think of ideas that have already been done https://www.nopistons.com/forums/pub...#>/biggrin.gif



but teknics, can you think of a car that does that? i've been around some 07 fords, mazdas, and nissans, and haven't seen that. someone told me that vw did it once, but i haven't seen it

i think i saw it on maybe a BMW, maybe toyota, no american cars would have something like that, when they need better cooling they just add an extra 50lbs to the radiator.



i just know ive seen it a few times when replacing radiators in cars, so by new I mean like something newer then 2000.



and flex-a-lite sells shrouds like that on summit.



kevin.

as always, thx for the input. you got mat phat exp, yo https://www.nopistons.com/forums/pub...#>/biggrin.gif lol

Summit sells a setup like that, I have it on my FC.



https://static.summitracing.com/glob.../bci-75007.jpg

oooo that is nice...price/rad you have it on?

I bet that dual setup pulls close to 20 amps of power. At idle, with other accesories running, im sure an FD alt will have a hard time powering that untill you step on the gas.

Correct!!



I run one all the time and the other is on a thermo switch, I run an FD motor and Alt. in my FC. I see 14v at idle with my huge fuel pump and 1 e-fan running.