Passive Engine Heat Extraction Made Easy
Thread Starter
Drifting
Joined: Feb 2010
Posts: 1,527
Likes: 34
Passive Engine Heat Extraction Made Easy
Corvette engine hood traditionally is opened from rear and with C6, rear hood is the highest point! Most after market hood has front or rear facing scoop, located somewhere either close to front or middle, aside from lending to water intrusion and since heat raises, after market hoods don't address the captured heat at the rear. Whether OEM or after market, issue with rear captured heat remains and #7 cylinder suffers the most!
My simple passive solution without water intrusion:-
T6 lighten and mirror polished spacer under oem hood latch:
http://i896.photobucket.com/albums/a...6/P1010013.jpg
Delrin spacer for oem bumper stopper:
http://i896.photobucket.com/albums/a...6/P1010015.jpg
Hood closed and locked, fairly subtle and relatively weather tight:
http://i896.photobucket.com/albums/a...6/P1010016.jpg
Easily reversible back to stock! But why?
Criticism/witticism - anyone?
My simple passive solution without water intrusion:-
T6 lighten and mirror polished spacer under oem hood latch:
http://i896.photobucket.com/albums/a...6/P1010013.jpg
Delrin spacer for oem bumper stopper:
http://i896.photobucket.com/albums/a...6/P1010015.jpg
Hood closed and locked, fairly subtle and relatively weather tight:
http://i896.photobucket.com/albums/a...6/P1010016.jpg
Easily reversible back to stock! But why?
Criticism/witticism - anyone?
Thread Starter
Drifting
Joined: Feb 2010
Posts: 1,527
Likes: 34
Or, while standing still, hot air follows the path of least resistance, raise through the hood gap?
Pro
Joined: Oct 2004
Posts: 510
Likes: 5
From: Pipe Creek TX
Cowl induction works because the bottom of the windshield is a low pressure area. Your idea will push cooler outside air into the engine bay.
If you have ever left a C3 hood unlatched;and made a 1/4 mile pass ; the hood raises up at about 80 mph and faster ,about 12-14 inches.
If you have ever left a C3 hood unlatched;and made a 1/4 mile pass ; the hood raises up at about 80 mph and faster ,about 12-14 inches.
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Le Mans Master
Joined: Apr 2011
Posts: 7,821
Likes: 412
From: Montreal
St. Jude Donor '13
Great idea for the track but I wouldn't want to drive around like that full time. I removed the hood seal at the base of the windshield and noticed a few degrees drop in temps with no I'll effects.
Thread Starter
Drifting
Joined: Feb 2010
Posts: 1,527
Likes: 34
I did checked old school - using multiple soft yarn, secured them deep under hood lip, and next to gap (trying to stay out of hood top air stream), at multiple points to gauge effectiveness. At any speed, soft yearns flows just like table top fans with yearns tied on.
Most importantly, I've also found:
1. Stop and go traffic, about 5* lower - not significant! But being there as a positive physical gap, I felt positive it is doing good!
2. Steady highway speed w/84* ambient @ 65MPH, temp dropped 180'ish to 168* after 20 minutes, where used to stayed 178-180*.
3. Oil temperature was my concern, it held steady @201* per DIC during the coolant temp drops!
Overall, I am very happy with this mod.
Thread Starter
Drifting
Joined: Feb 2010
Posts: 1,527
Likes: 34
Some of my other past passive mods for shedding heat are not for everyone as well:
http://i896.photobucket.com/albums/a...6/P1010354.jpg
http://i896.photobucket.com/albums/a...6/P1010355.jpg
Just exercises for my imaginations - made uniquely for and mainly, to please me!
I remembered you mentioned that on another post in reference to the expensive Hood Latch Extender from Germany!
I choose to retain the hood seal, because that provides a base for an cushion extender I'd made, used to keep center of hood from vibrations when going over rough roads, as did oem. Another benefit is to retain oem function to divert wash/rain water at the end of both sides.
IMO, positive benefits of ridding damaging engine heat outweighs the two small gaps!
Certainly not for everyone and have fun on your future built!
http://i896.photobucket.com/albums/a...6/P1010354.jpg
http://i896.photobucket.com/albums/a...6/P1010355.jpg
Just exercises for my imaginations - made uniquely for and mainly, to please me!
I choose to retain the hood seal, because that provides a base for an cushion extender I'd made, used to keep center of hood from vibrations when going over rough roads, as did oem. Another benefit is to retain oem function to divert wash/rain water at the end of both sides.
IMO, positive benefits of ridding damaging engine heat outweighs the two small gaps!
Certainly not for everyone and have fun on your future built!
Thread Starter
Drifting
Joined: Feb 2010
Posts: 1,527
Likes: 34
Cowl induction works because the bottom of the windshield is a low pressure area. Your idea will push cooler outside air into the engine bay.
If you have ever left a C3 hood unlatched;and made a 1/4 mile pass ; the hood raises up at about 80 mph and faster ,about 12-14 inches.
If you have ever left a C3 hood unlatched;and made a 1/4 mile pass ; the hood raises up at about 80 mph and faster ,about 12-14 inches.
Safety Car
Joined: Sep 2007
Posts: 3,502
Likes: 82
Tufts....
Safety Car
Joined: Sep 2007
Posts: 3,502
Likes: 82
To me it looks like Victor shot that photo to show the worst possible angle. From more typical viewing angles I doubt most casual observers would even notice it unless you are about 3' tall. How about a few photos shot from a typical adult standing height Victor?
Le Mans Master
Joined: Apr 2011
Posts: 7,821
Likes: 412
From: Montreal
St. Jude Donor '13
Safety Car
Joined: May 2000
Posts: 4,827
Likes: 351
From: Albuquerque NM
Works when stopped, not at speed. The base of the windshield is A HIGH PRESSURE AREA. Air will be pushed in at speed, not blown out.
Prove it to your self. Tape some threads to the edge of the hood, drive at freeway speeds and watch as they are pushed INTO the engine bay.
Prove it to your self. Tape some threads to the edge of the hood, drive at freeway speeds and watch as they are pushed INTO the engine bay.
Instructor
Joined: May 2008
Posts: 239
Likes: 4
Remember when cars used to have a screen mesh grille in the top of the cowl to let air into the A/C and vent system? Remember the "cowl induction" system? The base of the windscreen is indeed a low velocity/high pressure area.