[Z06] Vette-Air Install and Cold Air Box mods for the Z06..>
08-14-2007, 11:02 AM
#41
Safety Car
Thread Starter
Added the Killer Bee yesterday. The performance bump is noticeable on the LS3/Npp. The exhaust howls like a Banshee now with the flaps open! BTW, Temp datalogging planned, but did a few small tests yesterday with a handheld Infrared gauge. Shot after a run on a 95 degree day, coolant temps about 205 degrees at the end. Popped the hood and got:
Top of Halltech filter: 101 degrees
Engine covers: 143 degrees
Removed the rear engine seal and replaced with a low profile trim piece that doesn't seal that high pressure area as discussed in a few posts above. Looks like a nice reduction in engine bay temps (cooler is always better) More long term datalogging to come on this.:
Top of Halltech filter: 98 degrees
Engine covers: 123 degrees
Top of Halltech filter: 101 degrees
Engine covers: 143 degrees
Removed the rear engine seal and replaced with a low profile trim piece that doesn't seal that high pressure area as discussed in a few posts above. Looks like a nice reduction in engine bay temps (cooler is always better) More long term datalogging to come on this.:
Top of Halltech filter: 98 degrees
Engine covers: 123 degrees
Last edited by Modshack; 08-14-2007 at 11:07 AM.
08-14-2007, 12:37 PM
#42
Safety Car
That was my point, the hood was NOT sealed, and the washer fluid cap is under the hood. The fluid was splashing out and being pushed to the windsheild by the hot air under there. I'm talking speeds of 100+ MPH at a track. If the air was going into the hood, the fluid would never show up on the windshield. I don't doubt at lower speeds the high pressure area at the intersection of the hood and windsheild would help force air under the hood, as in the "cowl induction" hoods on the '69 SS Camaros, and '74/'75 Vettes. However, I think as speed builds, the pressure differential (becomes greater under the hood) changes somewhere around 80-90 MPH. 
I sincerely doubt there will be a pressure change with speed that gives a reversal in the flow, in the hood Vs. out of the hood. Consider, NASCAR still uses an air intake at the base of the windshield and they are going at average speeds way above 90 MPH.
Modshack: As you have modified the rear seal (if you are sure there is no sealing of that location), please do an experiment for us: Tape some strings or threads to the lowered part of the seal, drive at speed and tell us where they end up, going out and up the windshield (air is leaving the underhood area) or into the engine bay (air going into the engine bay). Try different length strings, 2" to maybe 6", please.
Last edited by 6Speeder; 08-14-2007 at 12:44 PM.
08-14-2007, 06:26 PM
#43
Melting Slicks
IF the C6 is like the C5, the fluid is not coming from the washer fluid cap, but rather coming from the washer nozzles, on the wipers.
I sincerely doubt there will be a pressure change with speed that gives a reversal in the flow, in the hood Vs. out of the hood. Consider, NASCAR still uses an air intake at the base of the windshield and they are going at average speeds way above 90 MPH.
Modshack: As you have modified the rear seal (if you are sure there is no sealing of that location), please do an experiment for us: Tape some strings or threads to the lowered part of the seal, drive at speed and tell us where they end up, going out and up the windshield (air is leaving the underhood area) or into the engine bay (air going into the engine bay). Try different length strings, 2" to maybe 6", please.
I sincerely doubt there will be a pressure change with speed that gives a reversal in the flow, in the hood Vs. out of the hood. Consider, NASCAR still uses an air intake at the base of the windshield and they are going at average speeds way above 90 MPH.
Modshack: As you have modified the rear seal (if you are sure there is no sealing of that location), please do an experiment for us: Tape some strings or threads to the lowered part of the seal, drive at speed and tell us where they end up, going out and up the windshield (air is leaving the underhood area) or into the engine bay (air going into the engine bay). Try different length strings, 2" to maybe 6", please.
08-14-2007, 07:25 PM
#44
Safety Car
Thread Starter
It's pretty common knowledge that this is a high pressure area. Many cars use cowl induction feeds to CAI's from this location (The Mini is one). I don't know at what speed that may change if it does. I'm sure it has something to do with how much air is admitted into the front of the engine bay and has to escape. On the Vette this should be mimimal depending on how the underbody, and side extraction aerodynamics work. All street cars use this area as a pressurized inlet for the Ventilation/AC system. Regarding Temp reductions, i got similar (20 degree) reductions on my Audi by making the same change to the gasket seal so I know that works. I'm off on a trip til next week...I'll do some experimenting when I get back..
08-15-2007, 08:39 AM
#45
Safety Car
Sounds good Modshack. If you are seeing the fuel rail covers at lowered temps you are probably seeing the effect of ambient air coming in from the base of the windshield cooling them, not air coming in the nose of the car which would be heated by the radiator.
While that will work to cool the motor somewhat it will affect the aerodynamic balance at speed. I'd be careful till I know how it handles at high speed.
While that will work to cool the motor somewhat it will affect the aerodynamic balance at speed. I'd be careful till I know how it handles at high speed.
08-15-2007, 09:06 AM
#46
Instructor
Member Since: Mar 2007
Location: Mebane North Carolina
Posts: 106
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Couple of Questions for Carlos
Based on what I've read here, VetteAir will work with the K&N? Secondly, do you have an online set of installation instructions that I can read? Thanks
08-15-2007, 09:45 AM
#49
Burning Brakes
Thanks. I got the instructions and it seems easy to install. The video was too dark to see, almost black. I could make out that the work was being done on a yellow Vette but that's about all I could tell. Am I doning something wrong?
08-15-2007, 12:42 PM
#50
Former Vendor
Thanks,
Carlos...The next Big Brother
08-15-2007, 03:10 PM
#51
Melting Slicks
R.
08-15-2007, 03:37 PM
#53
Melting Slicks
08-15-2007, 04:06 PM
#54
Drifting
Yup, I just did my vette-air and I also have K&N. Only problem with grill is putting it back in and getting the push pins to snap in tight. Real pia there
08-15-2007, 04:10 PM
#55
Drifting
It's really minor on mine but definetly there. Car runs great though. Probably need some tuner attention to fix idle although it's in no way a problem.
08-15-2007, 04:14 PM
#56
Melting Slicks
R.
08-15-2007, 04:20 PM
#57
Drifting
08-15-2007, 04:30 PM
#58
Racer
Member Since: Oct 2004
Location: San Jose CA
Posts: 452
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08-15-2007, 04:55 PM
#59
Former Vendor
Yes, the Vette-Air will work with the K&N unit. We have a few customers running that combo with great results.
There is a online video and instruction on the website:
www.vette-air.com.
Thanks, and please ask me ANY question you wish (publicly or PM).
Carlos
08-15-2007, 05:32 PM
#60
Former Vendor
It seems that the K&N units really wakes up with the Vette-Air.
Your car will need some minor tweaks to clean her up...more air with the right amout of fuel will result in more power
Also, with cooler AIT temps, you may, just may be able to run a degree or two of additional timing.
Mr. Rudy in CA is seeing 56* nights
Wow, his car should really WAKE UP with the Vette-Air, PORTED INTAKE/TB and retune!Crap, here in Dallas Tx we have 90* to 95* nights...it sucks! I mean, it cools off to about 87* or so past midnight and that's it.
Thanks,
Carlos