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1,6,7,8 - Series and Mini Cooper General Chat related to models that do not fit into particular categories above. Please try to put your discussion in more appropriate sections. This section does cover the 1 Series, MINI Cooper and 8-Series vehicles: BMW 830i, BMW 840Ci, BMW 850i, BMW 850Ci, BMW 850CSi, M8, Alpina B12, BMW CS Concept and others.

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post #1 of 2 (permalink) Old 08-23-2004, 08:57 PM Thread Starter
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Own a '95 740i, one heavy mother if ever there was one....4200 lbs. Realistically, will the intake/exhaust/chip fix add to my throttle significantly? Any other 7-ers out there who have done this?
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post #2 of 2 (permalink) Old 11-20-2004, 12:00 AM
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The most significant help those will provide are better efficiency and less sensitivity to hot weather backing off the ignition timing advance curve.

New chip swill have improved algorythms which will enhance drivability. Not a lot of help with acceleration I'm afraid.

If you want that you need to not only help engine to breath better by wider intake all the way through, and I mean all the way, as in NO bottlenecks -- airbox, AFM sensor body, throttle body, extrude honed intake manifold, port and polish heads, and tuned headers and cat back exhaust, all in conjunction with a shorter rear diff so you can use the more freely reving characteristics. Will get same economy but jump all that weight quicker if you do all the above. But it is useless to do only one of the engine mods, unless yo uare in a hot climate and it is the chip.

If you do al the above, expect a good 15% improvement, and if you keep your original diff., better fuel economy.

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