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05-28-2021, 04:24 PM | #1 |
Second Lieutenant
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4.45 diff?
Found a few threads about 4.1s but nothing higher. Turnermotorsport has 4.45 and 4.75.
Just wondered if anyone has any real world experience with them. My Z4MC is a weekend/perfect weather queen that almost never sees the highway so top speed is not really an issue. Torque is |
05-28-2021, 06:09 PM | #2 |
Colonel
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Drives: Built not Bought 04 Z4 VF. E70
Join Date: Feb 2013
Location: Kitchener Ontario Canada
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I have dropped a 4.44 from an E83 in my non M for shits and giggles, as an experiment.
I am same as you, torque over top speed turns my crank. I believe the 6 speed in mine is same as in the M, could be wrong on that. Car should be ready to drive next weekend so I can report back my findings. I expect some traction issues with an open diff and estimated 450+hp If I can live with that short a ratio, I will fit an lsd
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W2A Intercooled Vortech V3Si, custom ducting, Alpha N, 60# Bosch,2.62 pulley, multi port WMI, Severn Tuning(pokeybritches), Tial, magnaflow,SS race muffler, 42 design,3.91LSD, H&R, Hotchkis,ST coils,Konis, Megan camber arms, AKG SS, Nylon mounts, Poly bushings, Carbon interior, CF Aero.APEX
Last edited by Steeler; 05-28-2021 at 06:46 PM.. |
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05-29-2021, 08:50 AM | #4 | |
Second Lieutenant
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Quote:
Please let me know how big of a difference you feel with the 4.44s What is the stock ratio for the non M cars? |
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05-29-2021, 09:04 AM | #5 | |
Colonel
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Drives: Built not Bought 04 Z4 VF. E70
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Quote:
Never actually driven one with stock ratio, got to modding the day I had it shipped from Florida to Canada.
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W2A Intercooled Vortech V3Si, custom ducting, Alpha N, 60# Bosch,2.62 pulley, multi port WMI, Severn Tuning(pokeybritches), Tial, magnaflow,SS race muffler, 42 design,3.91LSD, H&R, Hotchkis,ST coils,Konis, Megan camber arms, AKG SS, Nylon mounts, Poly bushings, Carbon interior, CF Aero.APEX
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05-29-2021, 09:18 AM | #6 |
Lieutenant
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For stock ratios take a look at this threads web archive link few posts in. There’s also a calculator on the site linked that’ll help out calculate what your cruising rpms will be at any gear when changing from any ratio to any ratio. https://www.zpost.com/forums/showthread.php?t=1826188
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05-29-2021, 11:13 AM | #7 | |
E86 M Coupe
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Also considered a 4.44 differential from an E83, but decided on a 3.46 for ease of availability. Not sure if an upgrade over my stock 3.23. Thou I have noticed at-least a 2mpg decrease due to ~500 rpm higher cruising speed. Standing by for your verdict of the 4.44, really really considered this at one point!
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