victorf

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?

carlrx7

i was told that the wind pressure at the base of the windshield was too great for air to flow through.

-Carl

timd38

Inginuity!

victorf

Didn't expect air to flow through, as into? I was expecting the chimney effect and go with the flow, when car is in moving?

Or, while standing still, hot air follows the path of least resistance, raise through the hood gap?

Mrc100

The two vettes at exoticsracing in las vegas run something similar to help with cooling.

5knives

Sticks up a little too much for me but nice idea. You should try to get some before and after data. See if/how much of a temperature drop it produces.

SG4206

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.

ebf2k

realcanuk

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.

victorf

Its all good how you feel! I am not into looks, all my mods centered on performance w/longevity as objective!

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.

victorf

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!

victorf

My mod retained all latches in OEM configuration. Hood gap allowed engine heat to escape as verified with taped yarns and hood does not raise at speed! If I post the speed at which I did the test - mod might lock this thread. Lets just leave it at that!!

Motorhead-47

Not sure I'd call your yarn technique "old school".


Tufts....

victorf

You see....caught me making troubles again!! Too funny!!

As usual, nice to hear from you Brah!

Boomer111

Agreed that it sticks up too much, this would drive me nuts.

Nice ingenuity though.

Motorhead-47

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?

realcanuk

Great point.

6Speeder

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.

timd38

I bought a hood with a vent in it and it works fine.

455HOGT37

+1

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.