Subject	I'd have to disagree with that statement
Posted by	zromtech on July 03, 2018 at 3:04 PM
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In Reply To	MAP based VE tuning doesn't require corrections for altitude posted by Stanky (BC) on July 03, 2018 at 01:39 PM
Message	as the Volumetric Efficiency itself changes with altitude. Specifically, with increasing elevation, the turbos need to spin faster and will operate at a higher pressure ratio for a given boost pressure. This results in increased exhaust manifold back-pressure which lowers V.E. The ECU will compensate for the changes in charge density, but since the V.E. has also changed, the fuel mass calculation will be incorrect and your A/F will be off target. - Sam
Follow Ups	Another year, another Edmonton Dynopalooza 18' edition - Stanky (BC) 10:23:24 07/02/18 Sorry I missed you this time. - Inzane 11:32:05 07/02/18 Next time! And exhaust gears dialed in yes. No intakes. (n/m) - Stanky (BC) 11:33:53 07/02/18 What do you have the exhaust gears set at? (n/m) - MLPS300ZX 12:18:03 07/02/18 Good times! Good to see you Stanky! (n/m) - ConVerTT 12:31:40 07/02/18 Would've expected more top end HP with the cams - ZXoltan 15:07:31 07/02/18 nice solid gain over last year - vorpalZ 20:45:47 07/02/18 Good seeing you again Stanky. - MixManMash 20:58:05 07/02/18 nice numbers! - zromtech 12:56:36 07/03/18 MAP based VE tuning doesn't require corrections for altitude - Stanky (BC) 13:39:15 07/03/18 I'd have to disagree with that statement - zromtech 15:04:22 07/03/18 I could be mistaken, but I believe the Haltech ECU - MixManMash 19:40:33 07/03/18
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