Can't live without smoky bacon!
- Apr 15, 2006
- Reaction score
- Sth Auck, NZ
- Members Ride
- HSV VS Senator, VX s2 Calais S/C
100% was thinking the 3.9.. should make it a good all rounder. out of curiosity how hard is it to find 3.9 ratio for a VR IRS?
I used to think 3.9’s were far too short but not any more. Got them in my auto ss and revs at around 2350 at 100kmph and still uses less fuel than my 5L with over 100rwkw more. I’d even go 4.11’s with an auto, and certainly wouldn’t hesitate with a manual. My only gripe with shorter diff gears is that the useable rev range in each gear isn’t always ideal.
For example with 3.07 at 100kmph it’ll kick back into second if you want it to - but it’ll only kick back into 3rd with 3.9’s. Not a big deal though. Can still manually select 2nd if really needed and I could always alter the tune.
I'm off the same opinion. I think the Senator will end up with 4.11's with the auto as it currently sits and then if/when it does get a T56 it will be perfect. I don't do a lot of highway driving and I need all the help to get close to my mate at the strip who as extra 50 cubes over mine.