i need fans for amps
05-23-2005, 03:51 PM
#11
500 Watt CAFz'r
Join Date: Mar 2004
Posts: 923
I never said extra cfm. I am pushing cool air and pulling warm air. Standard circulation.
In my application a push pull scenario maintains a lower temperature. I have proven it to myself and I offered an option to the original poster. If you don't agree then thats fine too.
In my application a push pull scenario maintains a lower temperature. I have proven it to myself and I offered an option to the original poster. If you don't agree then thats fine too.
05-23-2005, 05:53 PM
#12
Guest
Posts: n/a
The choice to go push/push or push/pull depends entirely on the static pressure of the system. To compare one extreme to the other:
System #1 has an amp in a box. The box is under a trim piece with a plexi front. There's lots of dead space under the trim plate to draw air from and expel it to. In this case I would use a push/push setup. THe air moves in and out easily
System #2 has an amp in a box. The box is under a trim piece with a plexi front. In this car there is very little space to draw air from OR buddy wants to shoot for points and puts in some fancy pipe work to and from the outside of the car, maybe through a heat exchanger, lots of elbows, etc. Well if one knows anything about prop (standard computer type) fans, they know that they are extremely sensitive to the static resistance they are subjected to. It takes very little resistance for their performance to totally tank. What happens then is the blades are spinning but the air goes no where. In this case one needs to help the air move along with either multiple fans in series pushing into the system, multiple fans exhausting the system, or a combination of the two (push/pull).
I would have to say that at least half of the fan 'cooling' setups I see in cars are totally misapplied.
System #1 has an amp in a box. The box is under a trim piece with a plexi front. There's lots of dead space under the trim plate to draw air from and expel it to. In this case I would use a push/push setup. THe air moves in and out easily
System #2 has an amp in a box. The box is under a trim piece with a plexi front. In this car there is very little space to draw air from OR buddy wants to shoot for points and puts in some fancy pipe work to and from the outside of the car, maybe through a heat exchanger, lots of elbows, etc. Well if one knows anything about prop (standard computer type) fans, they know that they are extremely sensitive to the static resistance they are subjected to. It takes very little resistance for their performance to totally tank. What happens then is the blades are spinning but the air goes no where. In this case one needs to help the air move along with either multiple fans in series pushing into the system, multiple fans exhausting the system, or a combination of the two (push/pull).
I would have to say that at least half of the fan 'cooling' setups I see in cars are totally misapplied.
05-23-2005, 08:49 PM
#14
or if the amp was sealed in a box for some reason....one fan pulling from one side and the other pushing from the other side would be ideal.
I mounted my amp to a board and then attached two fans on plexiglass that was somewhat "moulded" to go over the amp. both are in a push/push setup as advised by DWVW and it works very well and I am very happy with it.
Each situation is different.
I mounted my amp to a board and then attached two fans on plexiglass that was somewhat "moulded" to go over the amp. both are in a push/push setup as advised by DWVW and it works very well and I am very happy with it.
Each situation is different.
05-23-2005, 09:02 PM
#15
Guest
Posts: n/a
The only way I would do a push pull is if the setup was poorly sealed and there wasn't a definate path for the air to take. Of course I would never do that, any system I do has no leaks around the perimeter, and the system has a definate intake, a clear flow path, and a clear exit. In which case I like to put as many fans as I deem necessary pushing cool air into the equipment rack.
05-23-2005, 09:42 PM
#16
ok if you have a 500.2 PG amp in a sealed box (1/3 cft box - amp) how many fans would you do ?
i was going to do 3 cpu fans run a push/push/push with a hole at the top for hot air to go out what do you think?
how much air do i need to push?
i was going to do 3 cpu fans run a push/push/push with a hole at the top for hot air to go out what do you think?
how much air do i need to push?
05-24-2005, 01:04 PM
#18
Guest
Posts: n/a
Originally posted by DWVW:
The only way I would do a push pull is if the setup was poorly sealed and there wasn't a definate path for the air to take. Of course I would never do that, any system I do has no leaks around the perimeter, and the system has a definate intake, a clear flow path, and a clear exit. In which case I like to put as many fans as I deem necessary pushing cool air into the equipment rack.
The only way I would do a push pull is if the setup was poorly sealed and there wasn't a definate path for the air to take. Of course I would never do that, any system I do has no leaks around the perimeter, and the system has a definate intake, a clear flow path, and a clear exit. In which case I like to put as many fans as I deem necessary pushing cool air into the equipment rack.
05-24-2005, 08:53 PM
#19
But.....Dereck.....MDF is pourous so the air is always gonna leak... [img]graemlins/dunno.gif[/img] [/QB][/QUOTE]
why are you saying mdf whan i do this set up there will be no mdf near the fans or the amp
[/QB][/QUOTE]why are you saying mdf whan i do this set up there will be no mdf near the fans or the amp
