$txt['youtube'] = 'YouTube'; $txt['youtube_invalid'] = '#Invalid YouTube Link#'; Hood Fans

Author Topic: Hood Fans  (Read 1790 times)

0 Members and 1 Guest are viewing this topic.

Offline maxorrisdc

  • Newbie
  • *
  • Posts: 2
  • Location: Pacific MO
  • Cool Points: 0
  • Engine: Honda
  • Model Year: 2005
Hood Fans
« on: June 25, 2018, 02:41:48 PM »
I was just given a couple smaller 12v fans and was wondering if anyone had ideas on using these to help with cooling/engine performance. Iíve got the ol honda 190 with cold air intake and no other mods. Would it be worth pumping fresh air in for any reason. If not Iím just gonna use them to make a hillbilly air conditioner.  Haha
Thanks

Offline Painlesstom

  • Painless Tom
  • Administrator
  • Mokai Maniac Member
  • *******
  • Posts: 5798
  • Age: 45
  • Location: Georgia
  • Cool Points: 59
  • Making Your Mokai... A Better Mokai!
    • Painless Products
  • Engine: EX21 w/17 head - ES
  • Model Year: 2003 / 2011 / 2015
Re: Hood Fans
« Reply #1 on: June 25, 2018, 06:17:02 PM »
Nope, fans are a waste of time and just add weight. You want better cooling, let it breathe better by adding another vent over the carb to mirror the exhaust side. Air coming in has to get out, and you need twice the exit area as the inlet.
Tom

  >:D    

_________________________

www.PainlessClutch.com

Offline mokamo

  • Mokai Hero Member
  • ****
  • Posts: 319
  • Cool Points: 9
  • Engine: GC190
  • Model Year: 2006
Re: Hood Fans
« Reply #2 on: June 25, 2018, 07:29:57 PM »
maybe it would help if we can find a way to contain the hot air coming out from the muffler and make the hot air flow thru the hood. I think the stock mufler is prematurely dispersing the hot air below the stock hood causing the hot air stay and move around  inside the engine bay. So that ivthink will be my next mod to find a muffler that will have an exit point higher than the hood.

Offline maxorrisdc

  • Newbie
  • *
  • Posts: 2
  • Location: Pacific MO
  • Cool Points: 0
  • Engine: Honda
  • Model Year: 2005
Re: Hood Fans
« Reply #3 on: June 25, 2018, 07:55:28 PM »
Tom, that's where my cold air comes through my hood.  Is there another place I should put the hole for the air to escape?
Mokamo, I've debated creating a fiberglass tunnel coming down from the hood and around the outside of the exhaust to help funnel out the hot air. If I do that I'll let ya know how it goes.

Offline Painlesstom

  • Painless Tom
  • Administrator
  • Mokai Maniac Member
  • *******
  • Posts: 5798
  • Age: 45
  • Location: Georgia
  • Cool Points: 59
  • Making Your Mokai... A Better Mokai!
    • Painless Products
  • Engine: EX21 w/17 head - ES
  • Model Year: 2003 / 2011 / 2015
Re: Hood Fans
« Reply #4 on: June 25, 2018, 10:07:16 PM »
You can cut out a section between those areas just behind the air inlet scoop.
Tom

  >:D    

_________________________

www.PainlessClutch.com

Offline mokamo

  • Mokai Hero Member
  • ****
  • Posts: 319
  • Cool Points: 9
  • Engine: GC190
  • Model Year: 2006
Re: Hood Fans
« Reply #5 on: June 25, 2018, 10:13:29 PM »
looking forward for a picture when your done... ;)
Not sure if fibeglass can take heat without getting melted.. Ill see tomorrow if theres a way to extend the aluminum hood downward..
« Last Edit: June 25, 2018, 10:16:40 PM by mokamo »

Offline Hillbilly

  • Mokai Maniac Member
  • ******
  • Posts: 797
  • Location: Greensburg, Pa
  • Cool Points: 35
  • Engine: Subaru
  • Model Year: many
Re: Hood Fans
« Reply #6 on: June 26, 2018, 07:02:28 AM »
Hello MAXORISSDC,
I had similar thoughts some time ago and built a very nice exhaust fan system ;) for my first boat and Honda.  Tom is right.  No improvement.  Knowing what I do now, i would go with Tom's hood design early on.  The large opening allows hot air up and out without restriction.  And you are ahead of the game when you go to the Subaru. Tom once described it to me as his universal hood design and it really is.
Make the air conditioner.   ;)

Offline Painlesstom

  • Painless Tom
  • Administrator
  • Mokai Maniac Member
  • *******
  • Posts: 5798
  • Age: 45
  • Location: Georgia
  • Cool Points: 59
  • Making Your Mokai... A Better Mokai!
    • Painless Products
  • Engine: EX21 w/17 head - ES
  • Model Year: 2003 / 2011 / 2015
Re: Hood Fans
« Reply #7 on: June 26, 2018, 08:15:49 AM »
My fiberglass muffler cover is heat resistant, but I wouldn't trust it to deflect the Honda exhaust. And making one out of aluminum would just get hot enough to melt the ABS hood where it attaches.
Tom

  >:D    

_________________________

www.PainlessClutch.com

Offline mokamo

  • Mokai Hero Member
  • ****
  • Posts: 319
  • Cool Points: 9
  • Engine: GC190
  • Model Year: 2006
Re: Hood Fans
« Reply #8 on: June 26, 2018, 01:27:35 PM »
Youre right Tom with the Aluminum. So now we need to find something sandwiched in between that wont carry the heat to the ABS hood.

Offline Painlesstom

  • Painless Tom
  • Administrator
  • Mokai Maniac Member
  • *******
  • Posts: 5798
  • Age: 45
  • Location: Georgia
  • Cool Points: 59
  • Making Your Mokai... A Better Mokai!
    • Painless Products
  • Engine: EX21 w/17 head - ES
  • Model Year: 2003 / 2011 / 2015
Re: Hood Fans
« Reply #9 on: June 26, 2018, 01:35:45 PM »
I wouldn't try it personally. ABS softens and warps much too easily to take chances like that as far as I'm concerned. Can't just order a replacement anymore either. Whatever you choose to do, just be mindful of heat and don't do anything you can't back up from. ;)
Tom

  >:D    

_________________________

www.PainlessClutch.com

Offline mokamo

  • Mokai Hero Member
  • ****
  • Posts: 319
  • Cool Points: 9
  • Engine: GC190
  • Model Year: 2006
Re: Hood Fans
« Reply #10 on: June 26, 2018, 02:47:36 PM »
Not good to know theres no 2006 replacement hood we can buy in case this stock hood breaks.  >:(


Offline Painlesstom

  • Painless Tom
  • Administrator
  • Mokai Maniac Member
  • *******
  • Posts: 5798
  • Age: 45
  • Location: Georgia
  • Cool Points: 59
  • Making Your Mokai... A Better Mokai!
    • Painless Products
  • Engine: EX21 w/17 head - ES
  • Model Year: 2003 / 2011 / 2015
Re: Hood Fans
« Reply #11 on: June 26, 2018, 03:18:17 PM »
There haven't been any for years. I've been repairing as needed for those who send them in for conversions. Easy to work with, PVC cement works on ABS too.
Tom

  >:D    

_________________________

www.PainlessClutch.com

Offline mokamo

  • Mokai Hero Member
  • ****
  • Posts: 319
  • Cool Points: 9
  • Engine: GC190
  • Model Year: 2006
Re: Hood Fans
« Reply #12 on: June 26, 2018, 04:39:49 PM »
Thanks Tom. Is that PVC cement the best one you know to apply on areas with spider cracks. Mine has few hair size spider cracks around one button that holds the rubber strap.

Offline Larry

  • Mokai Hero Member
  • ****
  • Posts: 302
  • Location: Maryland
  • Cool Points: 24
  • Engine: Honda GC190
  • Model Year: 2007/2007
Re: Hood Fans
« Reply #13 on: June 26, 2018, 05:06:43 PM »
Tom, that's where my cold air comes through my hood.  Is there another place I should put the hole for the air to escape?
Mokamo, I've debated creating a fiberglass tunnel coming down from the hood and around the outside of the exhaust to help funnel out the hot air. If I do that I'll let ya know how it goes.
Here's what I did on my 2007 with the Honda. I made an opening over the air filter.

Offline Painlesstom

  • Painless Tom
  • Administrator
  • Mokai Maniac Member
  • *******
  • Posts: 5798
  • Age: 45
  • Location: Georgia
  • Cool Points: 59
  • Making Your Mokai... A Better Mokai!
    • Painless Products
  • Engine: EX21 w/17 head - ES
  • Model Year: 2003 / 2011 / 2015
Re: Hood Fans
« Reply #14 on: June 26, 2018, 06:12:49 PM »
Some good lookin' boats there, Larry.  \./8
Tom

  >:D    

_________________________

www.PainlessClutch.com