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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 02-21-2017, 01:06 AM   #15
kitlives
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Originally Posted by TkTk View Post
Thanks for sharing. I know many people are looking for such videos, as I did before getting the 4.88 FD.

Below is the 4.88 FD from weir performance.



Sorry if I derailed your thread.
Nice! Sounds real healthy!
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Old 02-21-2017, 01:07 AM   #16
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Originally Posted by zerocool86 View Post
Awesome videos guys.
I was actually thinking of going 4.88 since I have the auto.

Hey @kitlives do you have a video of the speedometer going thru gears? Would like to see what your shift points are with the 5.29 Thanks .
I'll see if I can get one and post it up.
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Old 02-21-2017, 05:43 AM   #17
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Old 02-21-2017, 07:12 AM   #18
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You have to remember the above graph is with a standard 4 speed whose 4th gear is 1 to 1 ratio. Our 6 speed transmissions are over drive so that chart would not be accurate for us.
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Old 02-21-2017, 07:14 AM   #19
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Stock size 215/45. I was wrong though 4k is at 80. 70 is about 3500. Still a lot higher.
80 for me is 3100.
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Old 02-21-2017, 09:26 AM   #20
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You have to remember the above graph is with a standard 4 speed whose 4th gear is 1 to 1 ratio. Our 6 speed transmissions are over drive so that chart would not be accurate for us.
Not exactly, that is a chart from Spencer Fabrications page for their BRZ/FRS gear ratio swap page. That is factoring in the correct ratio for 6th. It's pretty spot on.
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Old 02-21-2017, 10:14 AM   #21
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Not exactly, that is a chart from Spencer Fabrications page for their BRZ/FRS gear ratio swap page. That is factoring in the correct ratio for 6th. It's pretty spot on.
Boy it doesn't come close to my readings. But maybe they are using the manual trans and I think my automatic has a different 6th gear ratio.

Makes no diff to me. I love my 4.88's.
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Old 02-21-2017, 10:20 AM   #22
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Boy it doesn't come close to my readings. But maybe they are using the manual trans and I think my automatic has a different 6th gear ratio.

Makes no diff to me. I love my 4.88's.
Automatic does have different ratios on all of the gears, not just 6th. Gears are longer in the auto.
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Old 02-21-2017, 10:33 AM   #23
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oh no I know, but I'm 95% sure that page is geared more for the manual.
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Old 02-21-2017, 11:10 AM   #24
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i think my 70mph tach reading in 6th with my 4.56 rear is 3300+
Stock is about 3100rpm for a manual in 6th at 70mph, so 3300ish sounds about right with a shorter final drive.
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Old 02-21-2017, 05:16 PM   #25
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Automatic does have different ratios on all of the gears, not just 6th. Gears are longer in the auto.
Yes.Type

Six-speed manual

Six-speed automatic

Ratios: 1st

3.626

3.538

2nd

2.188

2.060

3rd

1.541

1.404

4th

1.213

1.000

5th

1.000

0.713

6th

0.767

0.582

Reverse

3.437

3.168

Last edited by Lunatic; 02-21-2017 at 05:37 PM.
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Old 02-22-2017, 08:17 PM   #26
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I have 4.88s with the auto and love it.
I've seen Lunatic preach this on many threads and I finally pulled the trigger today and installed 4.88 weir gears on my AT FRS.

Simply put, this car should have come like this from factory. Driving around town is a breeze and the car revs and accelerates a lot quicker.

11/10 would recommend. $1100 well spent imo.
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Old 02-22-2017, 08:31 PM   #27
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I've seen Lunatic preach this on many threads and I finally pulled the trigger today and installed 4.88 weir gears on my AT FRS.

Simply put, this car should have come like this from factory. Driving around town is a breeze and the car revs and accelerates a lot quicker.

11/10 would recommend. $1100 well spent imo.
I'm glad you like it. I'm still loving mine.
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Old 09-05-2017, 10:02 PM   #28
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Just emailed Spencer earlier. Looking at some 5.29 for my 2013 FR-S Auto
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