Subject	It is. I would tune at the elevation you intend to
Posted by	CaliguyPurdue (Selin Design) on February 03, 2010 at 2:32 PM
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In Reply To	really? posted by blackomega on February 03, 2010 at 02:12 PM
Message	drive the car in. Because atmospheric pressure is lower up there, you'll have a higher pressure ratio for the same boost. This will push you upwards on the compressor map resulting in lower efficiency and higher intake air temperatures. This will make you more detonation prone, so an agressive tune at sea level might be in the danger zone at altitude. www.selindesign.net
Follow Ups	Question: - blackomega 09:11:49 02/03/10 dyno *tune* (n/m) - blackomega 09:14:34 02/03/10 Are you tuning for performance or bragging rights? (n/m) - NytWolf 10:25:32 02/03/10 performance - blackomega 14:13:35 02/03/10 what did your tuner say when you asked him? - ali300zx 10:33:15 02/03/10 Re: what did your tuner say when you asked him? - blackomega 14:11:20 02/03/10 ....sigh - The Hawk 11:04:09 02/03/10 sigh - blackomega 14:05:20 02/03/10 More like yet ANOTHER bonehead q..... - The Hawk 14:57:35 02/03/10 cute - blackomega 15:26:48 02/03/10 Your just not very bright. - The Hawk 15:47:08 02/03/10 Neither are you. You just sit around and call people out - d_flore 18:21:39 02/03/10 I got my car dyno'd/tuned and I didn't have to... - The Hawk 09:10:09 02/04/10 It doesnt matter your car adjusts for air density (n/m) - d_flore 14:00:33 02/03/10 really? - blackomega 14:12:04 02/03/10 It is. I would tune at the elevation you intend to - CaliguyPurdue (Selin Design) 14:32:52 02/03/10 thank you for the informative answer - blackomega 15:28:20 02/03/10 The way I understand it the ECU has a mechanism that - d_flore 18:20:02 02/03/10 Something like that is not needed to maintain the AFR - CaliguyPurdue (Selin Design) 19:26:43 02/03/10 and I should note that AFR variance wouldn't be the - CaliguyPurdue (Selin Design) 19:32:42 02/03/10 oh interesting, so the MAF actually senses the air density - d_flore 12:33:49 02/04/10 The MAF senses the amount of air - CaliguyPurdue (Selin Design) 13:41:26 02/04/10 Oh interesting. Thank you for the lesson! (n/m) - d_flore 00:18:08 02/05/10
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