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From: In a parallel universe. Currently own 2014 Stingray Coupe.
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I have also seen owners just drill holes in the plastic block off panels that the guy in the video references to allow more air into the filter area. Just be careful when drilling.
To the best of my knowledge, the Z-06s had this area "open", right from the factory, and that was the reason for the screens in the grill area. I bought a pair of "cut-out" grill fillers, I think from Eckler's, as well as a pair of Z-06 grill screens, for my car, YEARS ago. I also bought a Z-06 air box "front piece", with the larger opening. I can't really recall if these pieces helped the performance or not, as they've been in place for so long....
The Z06 needed additional airflow because they moved the rev limiter to 6500 rpm. When testing for engine bay heat they found a slight reduction in IAT than the base engine but not significant enough to increase the HP. The cubic inch of any cylinder is about 43.25 cubic inches, unless you forced induce air or add extra oxygen (NO2) you are not going to add more HP. Those air cleaner systems that us a sealed outside air intake into the engine (VeraRam, Calloway, Ice Box, etc.) will allow a more dense intake charge of ambient air into the engine (160 deg engine air vs. 80-90degree ambient air) and will produce maybe 3-4 hp under high engine speeds.
The Z06 needed additional airflow because they moved the rev limiter to 6500 rpm. When testing for engine bay heat they found a slight reduction in IAT than the base engine but not significant enough to increase the HP. The cubic inch of any cylinder is about 43.25 cubic inches, unless you forced induce air or add extra oxygen (NO2) you are not going to add more HP. Those air cleaner systems that us a sealed outside air intake into the engine (VeraRam, Calloway, Ice Box, etc.) will allow a more dense intake charge of ambient air into the engine (160 deg engine air vs. 80-90degree ambient air) and will produce maybe 3-4 hp under high engine speeds.
And a for the other air cleaner systems like K and N, Black wing, Etc. Will make more sound kind of like the old cars were we would flip the air cleaner lid over.
The structure for nitrous oxide (trade name NOS, shortened name nitrous) is N2O, not NO2 which is nitrogen dioxide.
Also, IAT are one thing, but the overall amount of oxygen available to be combusted is increased when you open up those front vents.
In fact, for fun, Id ask anyone to go to their car, and try to see where outside air can enter the stock airbox on a non-Z06 car with the front fog bezels in tact. It's almost completely surrounded by the radiator bezel, frame, and hood. The only air entering the airbox, is really air from the engine compartment.
On the Z06, the 02 intake with the larger front opening on the air box, and descreened-MAF were worth 5hp over the 01 Z06 intake according to GM.
Granted, this was with tuning, but it shows how sensitive this part of the car is
Last edited by 02torchred; Aug 14, 2019 at 01:05 AM.
On the Z06, the 02 intake with the larger front opening on the air box, and descreened-MAF were worth 5hp over the 01 Z06 intake according to GM. Granted, this was with tuning, but it shows how sensitive this part of the car is
Torch, we recently discussed this topic on another thread, but where did you get the info/reference to what GM found here?
The 01 Z had 385hp and my ‘02 had 405. Where does the 5 hp fit in?
FWIW, I have thought about doing this for a long time. In fact there was a thread somewhere that showed a variety of attempts. I don’t want to pull those bezels out completely because I like the fogs to be as unobstructed as possible, since I plan to find a bulb that will make them more effective.
In fall of 2001 our club was fortunate to have the chief engineer of the GM Powertrain Division give a talk about the differences of the 01Z engine to the 02Z. I took notes and posted it on the forum at that time. Over 15 hp came from the cam changes all the others-including the elimination of the pup cats, tuning, etc counted for the other 5hp. The larger opening was so it could breathe better above 6000 rpms, and the descreened MAF required tuning to even get it to run smoothly and contributed less than 2 hp.
The Incoming Air Temperature as measured after the MAF is an intricate control in how the Adaptive Strategy in the PCM relates the engine management system to add or pull timing, injector pulses, etc. The air temperature going into the engine is so important that if you run a scan log and just look at your timing at 160F IAT vs 85F you will see about 10 degrees of timing pulled from the engine.
I'll try to find more info but there have been numbers circulating for years that came from GM. The 02 got a larger intake box slit, de-screened MAF, no Pup cats, better main cats with Rhodium metal, .025 higher lift cam with +7 degrees exhaust duration and +1.5 degree different LSA, -2 degrees retarded, and different valves - exhaust was sodium filled and intake was hollow
"Air first enters through the air cleaner housing. The new air box opening to the air cleaner increases by approximately 6.65 square inches (43 cm2). This additional Volume contributes to more horsepower. The new MAF sensor no longer has pre-sensor grid work known as air channels. Induction air thus flows less restricted through the mass air flow sensor and into the intake manifold."
You can mod yourself using black expanded metal or purchase these to work with oem driving lights.
This is GM part modded, Vararam also mods GM part for their C5 CAI.
For C5 air cleaner you can drill several large 2"-3" holes in plastic cover and rivet mesh similar to what you see in image.below.
