Changing to 3.73:1 Good Move.

[chappy]

Well with all the talk about diff ratio’s it started to get confusing for me so I though well I will go half way and got 3.73:1’s fitted.

I have an auto VY2 SS with a few goodies and it has had a VCM Mat tune. 228rwkw.

How did it work well I am very happy with the out come.

• Highway speed well at 100kmph the RPM sits on 2200rpm.
• Fuel economy I was getting around the 10.5ltr per 100klm, there has been none to very little change in that except on windy days if I hit a strong head wind its better than it use to be on fuel.
• The BIG change has been the drivability it’s just not the came car, around town its very responsive and I have found its using less fuel. Highway use well once again it’s more responsive, when passing a car its just so nippy now less throttle and more zip.
• Wheel spin well it does get a fraction more but its controllable, I have found it I don’t get it a big foot full its very quick of the mark.


I keep putting the changing the diff ratio because of the cost I didn’t think that spending $1,500 on just gears wasn’t a worth wile mod, god was I so wrong would recommend that the first mod be gears now before anything its such a big improver.

Next modification is a Stall converter Yank SS-2,800 hopefully, unless I take the big step and change over to manual 6 speed (still tossing the coin on this)

Anyway this is my bit on the changing of gear ratios “JUST DO IT” you won’t regret it.

[1991_Vn2nV]

Thats great news mate. My diff is currently being fitted with 3.89's at the moment so im desperately looking forward to seeing the difference it makes

[97 SEN]

Thanks for the info, i'm looking to do the same to my vs, do you know what the ratio was before hand, i'ld be assuming 3.08, and/or what rpms you were doing beforehand at 100.

[minux]

Cool, i went 3.9's, nothing beats launching thats for sure