Hot air OUT! New mod for anyone with too much time on their hands........
#29
Blow up or win
Thread Starter
Originally posted by the_saint
Thanks.
Looks like it will work. I am just hesitant to cut into the car like you did.
thesaint
Thanks.
Looks like it will work. I am just hesitant to cut into the car like you did.
thesaint
#30
Blow up or win
Thread Starter
An additional caution on this mod: You may need to shop around to find the "super flexible" dryer heat duct which is a METAL FOIL. Regular metal dryer duct will not make the tight radius bends required in order to easily fit inside the space between the engine compartment and interior of the fender. DO NOT USE PLASTIC as it will melt and/or degrade rapidly. Do not use regular duct tape to seal everything - use METAL only. I would still recommend everyone to wait until I have posted temperature readings to see how well this works before cutting. It could be just a huge waste of your time.
(Although my test drive the other day WAS impressive, it offers no proof that it will be effective beyond all doubt)
(Although my test drive the other day WAS impressive, it offers no proof that it will be effective beyond all doubt)
#32
Killer Turbo Twins
Join Date: Sep 2001
Location: Prairie Village, Kansas
Posts: 812
Likes: 0
Received 0 Likes
on
0 Posts
First your ghetto intake and now this? Where will it end!
I can't wait till you post that you took a saw to your hood to "vent" it. It'll be hilarious!
I can't wait till you post that you took a saw to your hood to "vent" it. It'll be hilarious!
#33
Rotary Freak
I love ghetto mods...cheap and effective. Hope this works. If so I'm buying a circular saw.
Ron, what are the other ghetto mods?
HD Racing (AKA:Homedepot): Manual Boost Controller
HD Racing: Cold RAM Air intakes
HD Racing: tourque brace[My favorite] two big ***(10" & 12") eye bolts...
Ron, what are the other ghetto mods?
HD Racing (AKA:Homedepot): Manual Boost Controller
HD Racing: Cold RAM Air intakes
HD Racing: tourque brace[My favorite] two big ***(10" & 12") eye bolts...
#34
Blow up or win
Thread Starter
Originally posted by jpandes
I love ghetto mods...cheap and effective. Hope this works. If so I'm buying a circular saw.
Ron, what are the other ghetto mods?
HD Racing (AKA:Homedepot): Manual Boost Controller
HD Racing: Cold RAM Air intakes
HD Racing: tourque brace[My favorite] two big ***(10" & 12") eye bolts...
I love ghetto mods...cheap and effective. Hope this works. If so I'm buying a circular saw.
Ron, what are the other ghetto mods?
HD Racing (AKA:Homedepot): Manual Boost Controller
HD Racing: Cold RAM Air intakes
HD Racing: tourque brace[My favorite] two big ***(10" & 12") eye bolts...
The reason the "hot air out" mod works so well is that you are actually helping to improve the efficiency of the radiator and intercooler by providing more airflow volume. A vented hood does the same thing. I think it would be ludicrous to make any quantitative statement about increasing power, but there is no question that this will help under hood components (and hopefully the engine) last longer.
I still plan on measuring how well it works - I just need to get motivated enough to spend the better part of a day doing this in a scientific method.
#38
Senior Member
Join Date: Jan 2003
Location: Charleston, SC
Posts: 275
Likes: 0
Received 0 Likes
on
0 Posts
This is a pretty interesting idea. The idea of cutting the FD makes me nervous, but I might get over it if this works really well. Do you think this would be too ambitious for a novice to try? Have you measured the temps or are you still satisfied that it is working well from your observations?
Sorry if that's too many questions.
Sorry if that's too many questions.
#40
Blow up or win
Thread Starter
Originally posted by ttpowerd
Doesn't hot air rise? So a vented hood, in theory, should allow more hot air out whereas a 2" hole that has piping going downward would upset this flow.
Doesn't hot air rise? So a vented hood, in theory, should allow more hot air out whereas a 2" hole that has piping going downward would upset this flow.
Anyway, yes of course - hot air rises - to the bottom of the hood, which is then literally sucked out the upper rear corners of the engine room by the low pressure area created by the NACA ducts at speed. And we are talking about TWO, 21/2" holes - one on each side. That's a pretty decent amount of air flow. The faster you go, the more it "sucks", until cavitation sets in and you have reached a maximum flow. What speed that happens at is anyone's guess.
It won't do a thing sitting at a stoplight - nor will a vented hood. That is why the Miata thermosensor mod is such a great idea also to help kick the fans on high at 205 instead of 217 while idling.*
(*I think that's the right temp differrence.)
#41
don't race, don't need to
water thermoswitch listed as switching on at 226F in manual. Yikes!
Wanna play with ducting, but gotta get new engine first, then brakes, then suspension then.... well you know
I STILL think it's cool you did this! My idol...
Wanna play with ducting, but gotta get new engine first, then brakes, then suspension then.... well you know
I STILL think it's cool you did this! My idol...
#42
Blow up or win
Thread Starter
Originally posted by ArchangelX
Did you ever measure the temps.
Did you ever measure the temps.
Like I said before, this was Mr. Chin's idea from the beginning, I just found kind of a funky and inexpensive way to implement it.
#43
omgwtfposlol
Join Date: Dec 2002
Location: Orange City, FL
Posts: 862
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by RyanREX
I can't wait till you post that you took a saw to your hood to "vent" it. It'll be hilarious!
I can't wait till you post that you took a saw to your hood to "vent" it. It'll be hilarious!
#45
Rotor DEMON !
Join Date: Nov 2002
Location: alberta canada/soon to be cape coral FL:D
Posts: 1,074
Likes: 0
Received 0 Likes
on
0 Posts
ok i am kinda lost as of whre evrything is. where i marked it in green that is the engine bay and that i have it over the 4"square. and the blue is the bottome that wodl go to the vent. am i rigth if not i need this explainde d a bit more and pics form more of a distance.
joel
joel
#48
Tequila? ..it's like beer
iTrader: (1)
Join Date: Mar 2001
Location: Woodbine, MD
Posts: 1,124
Likes: 0
Received 0 Likes
on
0 Posts
I hate to be a member of the ghetto club, but the last time I had my fender off I did this to my car too. There are some pics (a little higher-res and less cropped) HERE . They may not be the quickest to load, so be patient.
Can't say that I've driven it enough yet to notice anything significant, but I respected the theory behind it. Maybe I'll play with the digital kitchen thermometer if I get bored this weekend.
..dave
Can't say that I've driven it enough yet to notice anything significant, but I respected the theory behind it. Maybe I'll play with the digital kitchen thermometer if I get bored this weekend.
..dave
#49
Blow up or win
Thread Starter
Originally posted by bigmack000
ok i am kinda lost as of whre evrything is. where i marked it in green that is the engine bay and that i have it over the 4"square. and the blue is the bottome that wodl go to the vent. am i rigth if not i need this explainde d a bit more and pics form more of a distance.
joel
ok i am kinda lost as of whre evrything is. where i marked it in green that is the engine bay and that i have it over the 4"square. and the blue is the bottome that wodl go to the vent. am i rigth if not i need this explainde d a bit more and pics form more of a distance.
joel
#50
Senior Member
Join Date: Oct 2002
Location: South Florida
Posts: 617
Likes: 0
Received 0 Likes
on
0 Posts
Somewhere in this thread you mentioned that your passenger side vent did nothing originally, but I think now you're using them both for engine compartment airflow, right? I think you mentioned briefly that you changed the ducting for the oil cooler on the driver's side? But I'm not clear about that, given that I think it is supposed to use the driver's side fender vent.
I wonder if doing this mod only to the passenger side would cause any anomalies in airflow?
jds
I wonder if doing this mod only to the passenger side would cause any anomalies in airflow?
jds
Originally posted by RonKMiller
Yep, the green area is where you make the foil lined duct. You need to cut the hole in the interior side of the frame by putting your hole saw inside the exterior square to cut. BE VERY CAREFULL not to let the saw blade nick anything on the inside or you'll be paying big bucks to fix it......... The red area is where you cut the oval in the plastic duct to attach your 4" dryer hose.
Yep, the green area is where you make the foil lined duct. You need to cut the hole in the interior side of the frame by putting your hole saw inside the exterior square to cut. BE VERY CAREFULL not to let the saw blade nick anything on the inside or you'll be paying big bucks to fix it......... The red area is where you cut the oval in the plastic duct to attach your 4" dryer hose.