**** 4.083 Gears/Final Drive Installed****
4 Attachment(s)
Let me first say.... This is by far the BEST mod i have done to my NA car...
You turbo guys will understand ( remember the chills that went up your back when you first drove your FI car?? ) Thats me :icon38: First, 2nd and third gears are amazing. The car pulls sooo much harder now. I cant wait to get it to the track rental next friday. I have my ECU reflashed to the 7200 Rpm Redline. Here is a break down of the STOCK gear ratio's 1st Gear Ratio: 3.794:1 2nd Gear Ratio: 2.324:1 3rd Gear Ratio: 1.624:1 4th Gear Ratio: 1.271:1 5th Gear Ratio: 1.000:1 6th Gear Ratio: 0.794:1 -Reverse Ratio: 3.446:1 This is calculated using 255/45/17 Tires http://www.f-body.org/gears/ STOCK 3.357 Gear-- ECU REFLASH 3.357 ---HR Engine 6600 Rpm Redline --------7200 Rpm Redline----------7500 Rpm Redline First------40mph ------First-----44mph-----------First-----46mph Second ----66mph ------Second----71mph-----------Second----74mph Third------94mph-------Third----102mph-----------Third----107mph Forth-----120mph-------Forth----131mph-----------Forth----136mph Fith------152mph-------Fith-----166mph-----------Fith-----173mph Sixth-----192mph-------Sixth----209mph-----------Sixth----218mph STOCK 3.538 Gear-- ECU REFLASH 3.538 ---HR Engine 6600 Rpm Redline -------7200 Rpm Redline-----------7500 Rpm Redline First -----38mph ------First-----42mph-----------First-----43mph Second ----62mph-------Second----68mph-----------Second----71mph Third -----89mph-------Third ----97mph-----------Third----101mph Forth ----114mph-------Forth----124mph-----------Forth----129mph Fith -----144mph-------Fith-----158mph-----------Fith-----164mph Sixth ----182mph-------Sixth----199mph-----------Sixth----207mph No Reflash 3.7 Gear-- ECU REFLASH 3.7 ----HR Engine 6600 Rpm Redline ---------7200 Rpm Redline---------7500 Rpm Redline First -----36mph-------First ----40mph-----------First-----41mph Second ----59mph-------Second----65mph-----------Second----68mph Third -----85mph-------Third ----93mph-----------Third-----97mph Forth ----109mph-------Forth----119mph-----------Forth----124mph Fith------138mph-------Fith-----151mph-----------Fith-----157mph Sixth-----174mph-------Sixth----190mph-----------Sixth----198mph No Reflash 3.9 Gear -- ECU REFLAH 3.9-----HR Engine 6600 Rpm Redline ----------7200 Rpm Redline-------7500 Rpm Redline First ------35mph-------First ---38mph-----------First-----39mph Second -----56mph-------Second---62mph-----------Second----64mph Third ------81mph-------Third----88mph-----------Third-----92mph Forth------103mph-------Forth---113mph-----------Forth----117mph Fith-------131mph-------Fith----143mph-----------Fith-----149mph Sixth------165mph-------Sixth---180mph-----------Sixth----188mph No Reflash 4.083 Gear-- ECU REFLASH 4.083--HR Engine 6600 Rpm Redline ------------7200 Rpm Redline---------7500 Rpm Redline First ------33mph--------First ---36mph----------First-----38mph Second -----54mph--------Second---59mph----------Second----61mph Third ------77mph--------Third ---84mph----------Third-----88mph Forth ------99mph--------Forth---107mph----------Forth----112mph Fith ------125mph--------Fith----137mph----------Fith-----142mph Sixth -----158mph--------Sixth---172mph----------Sixth----179mph Here are the track results Vid http://www.youtube.com/watch?v=S8ZTsAgCabw Link to thread https://my350z.com/forum/drag/307682-new-best-13-064-105-5-all-motor.html Before and after the 4.083 gears |
10-08-07
Update on the Gears.. Put over 200 highway miles on the car this past weekend and was able to average 29 mile to the gallon. Not bad at all. I would of thought the 4.083 gears would have really killed my gas tank. Also, driving around town I am able to average around 22mpg. If I drive it like i stole it, then its around 18mpg. 10-13-07 Updated the Main post with my new time from the track.. Ran a personal best of 13.064@105.50mph. These gears are proving to be a nice addition. :) Here is the link to the thread. https://my350z.com/forum/showthread.php?t=307682 11-30-07 _JB's review on the 4.083 gears https://my350z.com/forum/showthread....=1#post4758726 Alberto's review of the 3.3 gears with Forced induction https://my350z.com/forum/showthread....ighlight=gears Justin's review of the 3.9 gears in a 07 350z https://my350z.com/forum/showthread....ighlight=gears 12-04-07 List of all Nissan gear ratios for each model. http://www.nicoclub.com/Greg/ratios.html The 4.083 gear comes out of a Nissan Frontier 2005-2007 King Cab M/T 2.5L C200 4.083 02-04-08 Frostydc4's review 350EVO 3.9 Final Drive Installed on my 5AT: Impressions https://my350z.com/forum/engine-and-drivetrain/332994-350evo-3-9-final-drive-installed-on-my-5at-impressions.html 05-20-08 13SECZ's review of the 4.083 gears https://my350z.com/forum/showthread....81#post5764381 06-02-08 L. Baggins Review of the 4.083 gears https://my350z.com/forum/engine-and-drivetrain/362588-my-review-of-the-4-083-final-drive-gears.html Later Todd |
Originally Posted by aceman
We should add the 07 stuff to this thread aswell
Todd Stock 3.538, 7500 rpm shifts: 1st............... 44mph 2nd.............. 72mph 3rd............... 103mph 4th............... 132mph 5th............... 168mph 6th............... 211mph 4.083 gears, 7500 rpm shifts: 1st............... 38mph 2nd.............. 62mph 3rd............... 89mph 4th............... 114mph 5th............... 145mph 6th............... 183mph I was the first 07 with 4.083 gears and recommended them to aceman when he asked me about them. As far as the 07 perspective... if you are n/a it really LOVES this gearing, especially with the new redline. 1st through 4th pull so much friggin' harder. Instead of shifting to 4th almost the instant I cross the finish line in the 1/4, I'm shifting into 4th right at or instantly after the 1/8th now (I only made one pass, it wasn't an impressive time since I left the line from almost idle due to clutch issues). |
wow, i've always wanted to do this swap but figure it's best to wait til i get an LSD. gimme a ride in that beast man!
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i know that the 3.9 adds 10% more power to every gear, how does this add up? i almost did this, but when f/i instead so im keepin the stock 3.5's
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yes please explain a little more on this, In a NA form does this peform better then the 3.9 gears . Also where would u obtain this mod what vendor. Im very itnrested in getting some proper gears for my revup to enjoy the 7k revlimit a little more.
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Hey Todd, how much was the total cost (FD gears and installation)?
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AWSOME
i want it haha, but is it safe to have the ecu up the rev to 7200? can we see dyno sheets that theres still power gain up to that rpm? oh and yea post how much it all was |
Originally Posted by aceman
With the new gears i should finish the 1/4 right at the top of forth gear... I hope i dont have to shift at the last second.
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Originally Posted by davidv
Nice mod for drag racing. If you at redline before the finish line, you may want to backoff the throttle instead if shifting.:)
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Nice mod. I really want to do this as well. I wonder if it's worth it though. I have a few questions and maybe you can help.
1. Does it just feel like it pulls harder or will you actually gain something noticable in the 1/4? 2. Do you lose any low end tq or does it feel like you gained? 3. Any drawbacks you see with this so far? 4. How much did you just get the final drive by itself without install? 5. Is your traction worse? Thanks. |
Originally Posted by RBlover69
yes please explain a little more on this, In a NA form does this peform better then the 3.9 gears .
Someone correct me if I am wrong.:) |
Originally Posted by dutchboy350Z
Hey Todd, how much was the total cost (FD gears and installation)?
Todd |
Here you go
Nice mod. I really want to do this as well. I wonder if it's worth it though. I have a few questions and maybe you can help.
1. Does it just feel like it pulls harder or will you actually gain something noticable in the 1/4? Yes it pulls alot harder 2. Do you lose any low end tq or does it feel like you gained? Feels like i gained more Tq 3. Any drawbacks you see with this so far? Nope, whole new car again.. Love it. 4. How much did you just get the final drive by itself without install? $430.00 5. Is your traction worse? Yes, traction is alot worse. If you are rolling in first and stomp on it, tires are roasting. Thanks. |
Originally Posted by davidv
Its primarily a drag racing mod. Racers want to cross the finish line at the top of some gear. If you cut it too close, you end up at redline before the finish line necessitating another shift.
Someone correct me if I am wrong.:) The other reason is to take better advantage of your powerband. Todd |
Originally Posted by aceman
The gears are $430.00 ( ring and pinion ) I ended up paying $150 for the install ( Im sure you know the story ) :)
Todd |
Thanks for the response. You seem pretty happy/excited. I guess i will be spending more money until christmas yet again.
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so for something like road racing the 3.9 is better off is what teh consensous is. (spelling on a PDA lol)
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Originally Posted by SuperBlack350
Thanks for the response. You seem pretty happy/excited. I guess i will be spending more money until christmas yet again.
Next friday :icon38: Todd |
Congrats Aceman.. This mod has made you super happy!! Hey are you going FI anytime soon? Who installed that bad boy?
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