Unless there is cool air underneath my hood. 
cold air intake
Safety Car
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
You might search ram air as there is a member who bought out a supplier of this type system and is in development of continuing the product line. Sorry cant remember who but hopefully someone will.
Burning Brakes
Joined: Feb 2002
Posts: 1,232
Likes: 28
From: South Riding VA
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Race Director
Joined: Feb 2002
Posts: 11,618
Likes: 1,055
From: Compound in the Grove, Ga.
2026 Corvette of the Year Finalist - Unmodified
2025 C4 of the Year Winner - Unmodified
2024 C4 of the Year Finalist - Unmodified
2020 C3 of the Year Finalist - Unmodified
2019 C4 of Year Finalist (performance mods)
2018 C4 of Year Finalist
2015 C4 of the Year Finalist
St. Jude Donor '16
Generally Cold Air Intake is associated with outside air, Your stock set up even with cut air lid still picks up air from under the hood or behind the bumper and crash bar assembly.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Negative. It is a fully, hot under hood air intake. Just like most of the aftermarket "cold air intakes" for 'Vettes that draw hot air.
How is that location not cold air? Just look at the thing! All of the actual "cold" air that is
coming in the front of your car" is going through the radiator, and out the bottom. None of it gets to the air filter b/c it is sealed out of the air filter area by the radiator shroud. The air the filter housing is ingesting is the same hot air, from the same general air space as all the other hot under hood air. You tell us; Where is it getting COLD air from??
How is that location not cold air? Just look at the thing! All of the actual "cold" air that is
coming in the front of your car" is going through the radiator, and out the bottom. None of it gets to the air filter b/c it is sealed out of the air filter area by the radiator shroud. The air the filter housing is ingesting is the same hot air, from the same general air space as all the other hot under hood air. You tell us; Where is it getting COLD air from??
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Melting Slicks
Joined: Oct 2000
Posts: 2,158
Likes: 9
From: N.E. WA
Exotic Muscle still has them. I just want the front part that goes in place of the plate, but it doesn't appear that they sell it by itself.
http://emracingcorp.com/scripts/prodList.asp
http://emracingcorp.com/scripts/prodList.asp
Race Director
Joined: Jun 2004
Posts: 13,963
Likes: 709
From: WI
This is one of those arguments that has been around a long time, like the thermostat. It's easy to check intake temp and I have always found them really close to ambient (except at extended idle). Awhile back I posted thermal airflow pictures showing how much comes in the hood gap.
It has been dyno proven there isn't much gain in cold or ram air intakes. The stock system is decent till higher power levels. I have a ram air intake on mine just because of the high speed in road course racing (you need a lot of speed before it helps).
It has been dyno proven there isn't much gain in cold or ram air intakes. The stock system is decent till higher power levels. I have a ram air intake on mine just because of the high speed in road course racing (you need a lot of speed before it helps).
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
This is one of those arguments that has been around a long time, like the thermostat. It's easy to check intake temp and I have always found them really close to ambient (except at extended idle). Awhile back I posted thermal airflow pictures showing how much comes in the hood gap.
It has been dyno proven there isn't much gain in cold or ram air intakes. The stock system is decent till higher power levels. I have a ram air intake on mine just because of the high speed in road course racing (you need a lot of speed before it helps).
It has been dyno proven there isn't much gain in cold or ram air intakes. The stock system is decent till higher power levels. I have a ram air intake on mine just because of the high speed in road course racing (you need a lot of speed before it helps).
1. Dyno tests won't show the hot air intake to be problematic, b/c the hood is open, and a fan iss circulating air, and
2. The drag track. Car sits in staging lanes, idling or not, by the time the light turns green, you're engine is ingesting air that is 200*F or higher. Not ideal. Not "cold air".
Burning Brakes
Joined: Nov 2013
Posts: 914
Likes: 277
From: St. Petersburg FL
I don't have Dyno numbers but I can tell you that the 2nd to 3rd shift (LT1 A/4) around 90MPH definitely kicks harder than before the mod. The car also runs a couple of degrees cooler at speed.
In my opinion, this Mod is definitely worth the effort!
http://forums.corvetteforum.com/c4-g...ir-intake.html
Advanced
Joined: Jul 2013
Posts: 92
Likes: 2
Sorry to burst your bubbles but I actually did some testing on this few weeks ago. -96 with cut lid and k&n filter. No additional ducts or holes.
90F day outside, I took a digital cooking thermometer and placed it in the intake ducting between maf and tb. with fully warmed engine, at idle the intake air temp was ~30 degrees hotter than ambient air.
As soon as I went over 20mph, intake air temp was only few degrees warmer than ambient air. No matter if cruising or flooring it, air temp didn't go up
that's cold enough for me, no reason to cut holes for one or two degrees.
90F day outside, I took a digital cooking thermometer and placed it in the intake ducting between maf and tb. with fully warmed engine, at idle the intake air temp was ~30 degrees hotter than ambient air.
As soon as I went over 20mph, intake air temp was only few degrees warmer than ambient air. No matter if cruising or flooring it, air temp didn't go up
that's cold enough for me, no reason to cut holes for one or two degrees.
Last edited by Tapio@FTTRacing; Aug 21, 2014 at 09:58 AM.