Cooling and Grounding Questions

Need help with your car stereo system? Have a technical question? Post here.
Post Reply
User avatar
csperl1
Posts: 101
Joined: Sat Jul 05, 2008 9:43 am

Cooling and Grounding Questions

Post by csperl1 »

Alrighty then...I am starting the install on my08 civic sedan and need some recommendations.

Cooling
I am running 3 ms2250TA's 1-4 ohm Stereo on 2 Scan Speak Tweets, 1-4 ohm Stereo on Legatia Mids , 1- 4 ohm mono on 2 IDQ10 Subs. I need to retain all of my trunk space so am going to ditch the spare and mount everything in the spare tire well (Hey I have AAA, Fix a Flat and a cell phone). My issue comes to cooling. I know the TA's run cooler than the originals but since I have NO circulation there I feel the sub amp will overheat and even if it doesn't I don't want to run them any hotter than I have to.
Has anyone ever cut holes in their floor and ducted air across their amps utilizing fans? Got any slick ideas? What is nice about this car is there is a plastic shell covering the undercar area of the well that would prevent any water or dirt getting up into the well.
Image
Image
Image

Grounding
I have heard the best place to ground unibody cars is up at the alternator case or battery because of welding, paint surfaces between panels etc. etc. Think I would be good grounding this thing in the back on a thick metal panel or run it up front?
Thanks
Alpine 9887, Rockford 360.2, ZX450's V2, 1 ZX350 V1, Legatia L1's, L3SE's, and, L6's, 2 ea. IDQ10D4V3



(Storage) 3 ea. MS2250TA's, 2 ea. MS250 (in parts)
Top
User avatar
mhyde71
Dr. Jekyll
Posts: 6231
Joined: Sun Jan 20, 2008 8:34 pm
Location: PG FanBoy in Green Mtn Vermont
Contact:
Contact mhyde71

Post by mhyde71 »

I am kinda dealing with same issue/concern.. Have you seen my install?? with the orig 2250 upside down in my jumper cable cubby??
I actually have it upside down and just a hole on one side for exhaust and a 8" cross-flow stinger fan on the other.. Then When I need/want more ventilation.. i lift the cover open and prop it up with something.. have a look.. perhaps you might get some ideas.. But heretofore I have had trouble figuring out what/how to get even more ventilation in/back/under there witout cutting more holes through the metal floor.. but would like to hear/see what you come up with, if anything...

M

my install: http://phoenixphorum.com/2002-my-nissan ... t5764.html
PAST WORK/S HERE::
https://www.facebook.com/KhameleonKoatings/photos_albums
Top
User avatar
csperl1
Posts: 101
Joined: Sat Jul 05, 2008 9:43 am

Post by csperl1 »

Anyone...Bueller?
Alpine 9887, Rockford 360.2, ZX450's V2, 1 ZX350 V1, Legatia L1's, L3SE's, and, L6's, 2 ea. IDQ10D4V3



(Storage) 3 ea. MS2250TA's, 2 ea. MS250 (in parts)
Top
User avatar
Bfowler
Briaans..... BRIAAAAANNNNNNS
Posts: 10769
Joined: Wed Dec 06, 2006 11:06 am
Location: So easy, a cavewomen could do him

Post by Bfowler »

i dont recommend cutting your floor so much as building a rack and making vents in that.

http://phoenixphorum.com/project-maxima ... t6495.html

heres a project where i made a cooling rack. its not in a tire will, but you can use similar pricipals
my ex-girlfriend said "its car audio or me"
i've had tougher choices at a soda machine...
Top
User avatar
csperl1
Posts: 101
Joined: Sat Jul 05, 2008 9:43 am

Post by csperl1 »

I want to build a similar rack in my spare tire well but feel it is pretty much sealed and fans would only circulate the hot air around and it would eventually reach the point of diminishing returns unless I get air in and out of the sealed chamber. Am I making sense? I think I have no other choice than to cut holes in the tire well and draw external air into the car. I am going to crawl under the car in the morning and see what is going to happen if I hack a hole in the floor :roll:
BTW the car has 3k miles on it.... :lol:
Alpine 9887, Rockford 360.2, ZX450's V2, 1 ZX350 V1, Legatia L1's, L3SE's, and, L6's, 2 ea. IDQ10D4V3



(Storage) 3 ea. MS2250TA's, 2 ea. MS250 (in parts)
Top
User avatar
fuzzysnuggleduck
Soy Milquetoast
Posts: 4423
Joined: Wed Dec 06, 2006 1:08 pm
Location: The best place on earth
Contact:
Contact fuzzysnuggleduck

Post by fuzzysnuggleduck »

If you hack intake and exhaust holes into the bottom of your car, you're going to get some dirt, rocks and other road junk up into those fans pretty quickly... unless you have some creative way of protecting the vents.
SOLD: '91 PG 4Runner
Top
User avatar
stipud
Voltage Ohms
Posts: 14719
Joined: Sat Nov 26, 1983 4:00 am
Location: Burnaby, BC
Contact:
Contact stipud

Post by stipud »

Definitely wouldn't recommend cutting holes in the body of your car. A trunk floor cover is replaceable, a rusted out dirt filled spare tire well is not (well, it is, but it's not something I would wish on my worst enemy).

Venting into your trunk is going to be your best option. You'll need an inlet on one side (probably in the middle of your car... you can put some slats so that the space is still usable). Then you would put the fans at the opposite end, say at the back of the trunk, blowing the air out of the tire well. This would create a proper draft, which would hopefully be enough to keep your amps running. Keep in mind your intake needs to have more area than your exhaust does, in order to get the most out of it.

Short grounds in your trunk should be sufficient. Try to avoid spot welded panels, and get near a bigger frame chunk if you can. Of course if you're willing to run a ground wire to the front of the car, that will definitely not hurt.
Top
User avatar
bretti_kivi
Shutterbug
Posts: 1595
Joined: Tue Aug 26, 2008 1:06 pm
Location: Päijät-Häme or Uusimaa

Post by bretti_kivi »

.. isn't there a vent to the outside world somewhere in the trunk? I know there is in my car... behind one of the trim panels. If you suck air through a simple filter, you won't get *that* much, but if you ventilate out to the other side, there's at least movement.

Bret
Top
Post Reply

Return to “Car Audio”