523 versus 525
09-24-2005, 02:14 PM
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I've been studying the specifications of the 523 and the 525. It seems they both have the same engine. But clearly something has been done to the engine to create the marked difference in horsepower and torgue between the two models? Does anyone know the technical details about what's been done to the engine? Also, would it be possible to tune a 523 up to 525 performance?
09-24-2005, 11:22 PM
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My Ride: 523iA, 2006, Silver Grey, Black Leatherette Interior, Fine-Wood Trim Poplar Grain Brown High-Gloss, 6 Speed Automatic Transmission with Steptronic, Automatic Air Conditioning with Extended Content, Interior and Exterior Mirrors with Automatic Anti-Dazzle Function (Incl. Folding Function for Exterior Mirror), Electric Front Seats with Memory for Driver, Multi-Function Steering Wheel with Cruise Control, Adjustable Steering Column, BMW Radio with 8 Speakers and CD Drive, Park Distance Control, Universal Bluetooth Cell Phone, Electric Rear Sunblind
Originally Posted by croesus' date='Sep 25 2005, 01:14 AM
I've been studying the specifications of the 523 and the 525. It seems they both have the same engine. But clearly something has been done to the engine to create the marked difference in horsepower and torgue between the two models? Does anyone know the technical details about what's been done to the engine? Also, would it be possible to tune a 523 up to 525 performance?
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. What I understood from him is that the 523i has a 1-stage air intake manifold, while the 525i has 3-stage air intake manifold. He also told me that the number of sensor on the intake header of the 525 is much higher than that on the 523i's. I wanted to know more details, but that is all what he told me. He said that he did not go into details because it would be too complicated from me. I told him that I have a masters degree in Mechanical Engineering
, so suddenly he turned out to be very busy with other customers and completely ignored me 
.
09-25-2005, 07:15 AM
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My Ride: 2005 523i (JetBlack)
Originally Posted by E60Speed' date='Sep 25 2005, 05:29 PM
Different ECU and intake
Rest of the Engine is 100% the same
Rest of the Engine is 100% the same
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