EK9 Gearbox 4.4 LSD or 4.7LSD??

[eg5civic]

I ahve tried searching the net so dont flame me i keep getting shitty answers about people putting aftermarket 4.9fd's in

Please halp?

[Chi]

4.4 FD with LSD

[markoJEK1]

depends what you're planning to do with the car, a 4.4 FD puts me on 3.5 rpm on the highway, 4.7 FD and 4.9 is more serious stuff, and wouldnt really be ideal for top speed / highway driving

[Chi]

I think he's asking what the ek9 gearbox is?

Correct me if I'm wrong.

[markoJEK1]

My bad. Mis-read. I believe its 4.4 LSD

[eg5civic]

Thanks guys

I do alot of highway driving but i may look at getting a 4.7FD in the future as i will track it every so often

And sorry for the confusing title.... i worded it really badly <.<

[Limbo]

yeah its 4.4 cos that's what i'm looking for!

[eg5civic]

lol well i'm gettting one with my motor.... idk i migth change the final drive to 4.7... will i need to change first gear and get that needle bearing too to do that???

Its gonna be N/A for quite a while so the closer ratio would be better

[MRGRIM]

depends what you're planning to do with the car, a 4.4 FD puts me on 3.5 rpm on the highway, 4.7 FD and 4.9 is more serious stuff, and wouldnt really be ideal for top speed / highway driving

just to clear things up
the higher the diff ratio number the lower the top speed
the lower the diff ratio number the faster take off

for example:-
4.11 great for draging ...quick off the line
3.77 great for top speed...slow off the line

[DLO01]

What Marko said is right. Your just contradicting yourself.

[ek4-guy]

The terms higher and lower can get a little confusing when reffering to FD ratios. If someone changes to a higher gear ratio they are actually changing to a numerically lower ratio. If you were to swap a 4.4:1 gearset with a 4.9:1 gearset you would be switching to a lower gear even though the ratio of driveshaft turns to turns of the wheel is higher. If you swap a 3.42:1 with a 2.93:1 you are switching to a higher ratio. I don't how high ended up meaning low numerically or low ended up meaning high numerically, but they do.

A higher gear ratio would improve mileage and lessen wear on the engine somewhat but at the cost of less acceleration. A car is also capable of a higher top speed with a higher gear. Cars that are meant to do a lot of interstate cruising have higher gears.

[eg5civic]

so if i wanted to throw a 4.75FD gear in an ek9 box will i just need the FD gear??

ANything else need to be changed?

[markoJEK1]

Usually you change the crown wheel / pinion ( these 2 parts determine the final drive ratio) , these are the parts you are talking about when you're referring to FD

[eg5civic]

Yeah thats what i'm talking about

ATS and The honda manual refer to it as the 4.75 FD gear but i'm assuming thats what it would be