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The BMW Range
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E90, E91, E92, E93
How are your 320d doing so far?
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<blockquote data-quote="Maniac" data-source="post: 521599" data-attributes="member: 20491"><p>not sure, I've asked for the package specs & price when it becomes available, the guys at quill said they'd send it over. maybe they don't have the full details.</p><p>i'm under the impression that the ZF GA6HP19Z 6 cogs that we get in the 320ds is designed for 400Nms - though feedback from other forums seem to indicate exceeding this design torque is "ok". Quote from e90post <a href="http://www.e90post.com/forums/showthread.php?t=97568" target="_blank">http://www.e90post.com/forums/showthread.php?t=97568</a></p><p></p><p>"That's quite correct - the torque is always the limiting factor in gearbox designs, as it is this twisting force that will ultimately wear down gearboxes. Where manufacturers give nominal torque ratings for their gearboxes (for instance the 400NM for the GA6HP19Z) these ratings are specified with quite considerable tolerances, to ensure that the gearboxes last for the lifetime of the vehicle. In practice of course, automatic gearboxes do fail, but the failure rate has dramatically decreased with the more modern ZF gearboxes compared to the older designs.</p><p></p><p>The most respected tuners - Hartge, Alpina, Carlsson for Mercs, DMS, Dinan, and others - understand that there are inherent limitations in each model car's specification, and will only tune your car within the limits of the mechanical components. Having a tuned remap producing 500NM in your car whose gearbox is only technically rated to 400NM is not so much of a problem, because the tuners 'torque-limit' the output to ensure that there isn't an excess of twist-action under full engine load.</p><p></p><p>Hartge in particular (I can't speak for the others, other than Alpina but that's a completely different story) warranty their remap and components associated with the remap. So in effect if your gearbox fails BECAUSE of the remap, then Hartge will pay for your new gearbox. However of course that depends on whether it can be proved that the gearbox failed due to the extra torque, or whether it was just a dodgy gearbox in the first place."</p></blockquote><p></p>
[QUOTE="Maniac, post: 521599, member: 20491"] not sure, I've asked for the package specs & price when it becomes available, the guys at quill said they'd send it over. maybe they don't have the full details. i'm under the impression that the ZF GA6HP19Z 6 cogs that we get in the 320ds is designed for 400Nms - though feedback from other forums seem to indicate exceeding this design torque is "ok". Quote from e90post [url]http://www.e90post.com/forums/showthread.php?t=97568[/url] "That's quite correct - the torque is always the limiting factor in gearbox designs, as it is this twisting force that will ultimately wear down gearboxes. Where manufacturers give nominal torque ratings for their gearboxes (for instance the 400NM for the GA6HP19Z) these ratings are specified with quite considerable tolerances, to ensure that the gearboxes last for the lifetime of the vehicle. In practice of course, automatic gearboxes do fail, but the failure rate has dramatically decreased with the more modern ZF gearboxes compared to the older designs. The most respected tuners - Hartge, Alpina, Carlsson for Mercs, DMS, Dinan, and others - understand that there are inherent limitations in each model car's specification, and will only tune your car within the limits of the mechanical components. Having a tuned remap producing 500NM in your car whose gearbox is only technically rated to 400NM is not so much of a problem, because the tuners 'torque-limit' the output to ensure that there isn't an excess of twist-action under full engine load. Hartge in particular (I can't speak for the others, other than Alpina but that's a completely different story) warranty their remap and components associated with the remap. So in effect if your gearbox fails BECAUSE of the remap, then Hartge will pay for your new gearbox. However of course that depends on whether it can be proved that the gearbox failed due to the extra torque, or whether it was just a dodgy gearbox in the first place." [/QUOTE]
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How are your 320d doing so far?
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