Wich differential is better for 1/8 track 3.9 or 4:30?

[CarlosPTR210]

Wich differential is better for 1/8 track?

Stock 3:90 Turbo ’88 differential or 4:30 NA Differential

My car Set Up (DD car)

7MGTE
NOS 50HP’s Shoot
Garret 35R Turbo, High Boost 18 Psi, low boost 11 psi
Act Stage 3 Clutch Kit
Fyndanza Flywheel
18” wheels
Back tires Drag Radials

 

[arod]

3.90:1

 

[HommerSimpson]

4.30

 

[deabionni]

^^^ Agreed. 4.30.

In short, the higher the number is, the faster the car will accelerate. The downsides are, you turn higher RPM's at highway speeds, and your top speed will also be lower.

 

[figgie]

for 1/8 exclusively.

4.3

for real life driving. 3.7

 

[RazoE]

better start shifting quicker, too..

the RPM's on the highway are a little too high for me with my 4.30, I'm doing 80 and I'm at 3K rpms...

might swap to a 3.9 later...

 

[gofastgeorge]

If you find a set of 4.56 gears would be better yet.
The guy that goes by the ID mx83*gx81 sells a lot of JDM Supra/Cressida parts on eBay has different gear sets listed from time to time.
You might want to ask him.

Oh yeah, better get some really sticky tires

 

[figgie]

better start shifting quicker, too..

the RPM's on the highway are a little too high for me with my 4.30, I'm doing 80 and I'm at 3K rpms...

might swap to a 3.9 later...

W58 transmission because on the R154 + 4.3 back end. 80 will net you around 3600 rpm.

The r154 + 3.9 rear = 70mph @ 2900 rpm (going from memory).

 

[RazoE]

oh wow, that's worse..

any idea on 3.9 speeds/rpm on a W58?