Page 1 of 1
DIFF RATIOS
Posted: Sat Feb 21, 2009 1:18 pm
by AZZA'S HJ47
hi all getting the hj47 closer to completion and at the moment thinking about diff gears will be running 33-35 tyres vehicle has a 5speed box and a 2h with a turbo main concern is that i dont want the engine to be doing a million rpm at 110k tell me what you running and what are the like
Posted: Sat Feb 21, 2009 3:54 pm
by bj on roids
33s and 35s fine on a 2H with turbo.
Low range gears in transfer case might be okay down the track.
Your engine will rev a little less on the highway, so it will be good for it.
Posted: Sat Feb 21, 2009 8:17 pm
by Sixty's Guy
I found the standard 4.11 diffs great for 33" tyres, 2H turbo & 5 speed. When I went to 35" I found that 5th gear was next to usless. I have now gone to 4.56 and that is ideal.
Posted: Sat Feb 21, 2009 9:16 pm
by AZZA'S HJ47
thats what i wanted to hear what kind of rpm are you doin at 110
Posted: Sun Feb 22, 2009 7:12 am
by Sixty's Guy
I'll have to get back to you on that one - the Cruiser is at the doctors at the moment.
According to my gear ratio calculator with 35z and 4.56 diffs I should be doing around 2550RPM as opposed to 2450RPM with 33z and 4.11 diffs.
Posted: Mon Feb 23, 2009 6:16 am
by bj on roids
Sixty's Guy wrote:I found the standard 4.11 diffs great for 33" tyres, 2H turbo & 5 speed. When I went to 35" I found that 5th gear was next to usless. I have now gone to 4.56 and that is ideal.
Mine was turbo with work done to it, and I found fifth gear fine.
But I know what you mean, becuase my 3B with 35s and 5 speed didn't like running in 5th gear.
Posted: Mon Feb 23, 2009 6:18 am
by bj on roids
I think some of the Mark's gearsets have 8% high range reduction too.
Posted: Thu Mar 19, 2009 5:50 pm
by evanstaniland
If i want to put 35s on my 100 would i need 4.56 to bring it back to standard?? i do alot of towing so i need it like standard!!
Evan