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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > raised rev limit to 7500.



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      04-22-2021, 09:13 PM   #23
tree233
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Quote:
Originally Posted by E92_William View Post
You could also just change your 3.91 to a 3.73 and that should give you the room to stay in 3rd gear during that corner, probably cheaper to do than switching to an n54 manifold and tuning for it
Yeah true, I've looked at that, it gives me 6km/h extra in 3rd - not much extra if I run a softer tyre and up my mid corner speed again.
Either way I'd have to swap my LSD over to the new ratio pumpkin, which requires backlash reset, therefore not cheap either.

Interestingly, I tested my rev limiter and the hard limit is already 7500rpm, with the soft limit noticeable at 7200rpm.

Sooo.... I dono what to do.

Does the soft limit add safety for when the hard limit is hit? Or can I remove it and only have the 7500 hard limit?
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      04-22-2021, 09:43 PM   #24
hassmaschine
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What tune do you have?

I always disable the softlimiter. It's pointless and annoying. So I set both the high/low thresholds to the same value, and disable the valvetronic limiter (it reduces lift after 6500rpm).

The factory rev limiter was what I hated the most about the factory tune, and what lead me to develop tuning for the N52 in the first place. Ugh!
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      04-22-2021, 10:08 PM   #25
tree233
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I love the disgust! Hahaha

It's an Australian (euro) 02/2006 E87 130i.

It doesn't have any tune yet (that I know of). I may get one from you once I decide which path to take.

I am confused and surprised by the 7500rpm hard limit...
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      04-22-2021, 11:54 PM   #26
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I'm not aware of any stock tune that goes beyond 7000rpm.. so maybe yours has already been tuned?
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      04-23-2021, 12:32 AM   #27
tree233
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Oh dear... I hope not considering that the acceleration wasn't that impressive when it had the stock 3.46 ratio diff.

My partner also has a neat low km 130i and hers has noticeably more torque. I should test the limiter on hers (while she's not looking lol).

Maybe it's just an Aussie thing... cause we go hard straya!

Can you tell if it's got a tune if I send you "the files"?
Could it be of any use to you?

Last edited by tree233; 04-23-2021 at 12:44 AM..
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