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11-17-2010, 02:49 PM
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#1 |
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movin' down the motorway
Drives: Summiit White 2SS/RS/M6 Join Date: Feb 2010
Location: Palmetto Fl and Peabody MA
Posts: 740
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Hood open or closed on the Dyno?
I was wondering if a car is dyno'd with the hood open, then dyno'd with the hood closed, is there a benefit either way?
tuning noob is all ears and thanks as always
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417 stroker - Florida Speed and Power
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11-17-2010, 02:51 PM
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#2 |
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Lady Racer
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Hmm...I don't think I've ever seen a car dynoed with the hood down...
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 2014 Ford F150 Tremor 2012 Shelby GT500 |
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11-17-2010, 03:34 PM
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#3 |
 Drives: 2019 C7 Stingray Join Date: Jul 2010
Location: USA
Posts: 558
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Well it's certainly an interesting question, but I'll have to go with hood open on this one.
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11-17-2010, 04:17 PM
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#4 |
 
Drives: where to begin... Join Date: May 2010
Location: MiSSiSSiPPi
Posts: 34
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I do all my calibrating with the hood closed and a good fan setup. You don't drive around with the hood up...
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11-18-2010, 09:28 PM
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#5 |
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"Silver Street"
Drives: 2010 2SS/RS L99 Join Date: Oct 2009
Location: Franklin, TN
Posts: 707
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With the hood open, the heat from the engine moves away from the CAI. With the hood closed and a good fan blowing on the front, you get a more realistic number. Shops tend to use the hood open method to show bigger numbers, but don't drive with the hood up, please
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Silver Street - 2010 Camaro 2SS/RS, SIM, Gray, Cyber Gray Rally Stripes, Polished Wheels, Automatic (L99) - 553 RWHP/510 RWTQ
CAI Inc., ARH LT Headers with Cats, Borla Touring Cat-Back; Pfadt Coil Overs, Sway Bars, End Links, and Trailing Arms; Comp Cams Blower Cam, Dual Springs, Push-Rods, and Lifters; GM LS2 Lifter Trays, 6.2 MLS Head Gaskets, Crank Bolt, and LS2 Front Cover; 3-Bolt Conversion Timing Gear, Katech C5R Timing Chain, ARP LS2/LS3 Head Bolt Kit, Melling Hi Volume Oil Pump, TVS 2300 Supercharger (Black); Build by Vengeance Racing; Custom Tune by Vengeance Racing |
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11-18-2010, 09:33 PM
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#6 | |
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Account Suspended
Drives: 2010 Camaro Join Date: Feb 2010
Location: Sandy Hook, CT
Posts: 11,927
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Quote:
Look at the video of Jannetty testing the cai's. Closed if you want real numbers, open if you want the max numbers. There will be a difference between the two results. |
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11-26-2010, 06:58 PM
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#7 |
      
Drives: Varies Join Date: Dec 2009
Location: Costa Mesa, CA
Posts: 2,182
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Most shops fans can't get anywhere near the air flow though the front of a car, as driving it down the street.
Up or down, do it the same way each time. In a perfect world everyone would have huge fans, the hoods would be down, and every car would produce the exact same results for the same mods. |
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11-26-2010, 07:08 PM
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#8 | |
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Drives: 1999 Trans Am Join Date: Jul 2009
Location: Bridgewater,Ma
Posts: 2,017
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Quote:
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11-28-2010, 09:37 PM
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#9 |
Drives: 2010 Camaro SS Join Date: May 2010
Location: Phila,Pa.
Posts: 557
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Couldnt agree more Don
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2010 Camaro 1SS/A6 12.59@111.31 Magnaflow Magnapack Axleback & Resonated X-Pipe/OBX LT Headers/Airaid Cold Air Kit/Injection Connection Tuned |
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11-28-2010, 09:49 PM
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#10 | |
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2SS
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