Notice: We request that you don't just set up a new account at this time if you are a previous user.
If you used to be one of our moderators, please feel free to reach out to Chris via the facebook Outerlimits4x4 group and he will get you set back up with access should he need you.
Recovery:If you cannot access your old email address and don't remember your password, please click here to log a change of email address so you can do a password reset.

GU LS2 Diff Ratio Selection

Tech Talk for Nissan owners.

Moderators: toaddog, V8Patrol

Post Reply
Posts: 65
Joined: Mon Jan 07, 2008 1:24 pm
Location: Victoria

GU LS2 Diff Ratio Selection

Post by noodle »

Hi all.

Got a 6l LS2 going into a GU manual and it currently has 4.6 diffs. Im thinking the gearing will be too low. Will be running a combination of 33's and 35's.

Anyone recommend a good starting point for diff ratios ? 4.3's 4.1's ?

Cheers
Posts: 160
Joined: Wed Oct 10, 2007 11:07 am
Location: yeppoon

Post by suttygu »

i have 4.3 in mine is good with 33's going to35's soon which i think should be better again the ls2 has a lotof bottomend.. its good
gu 3 inch lift, 305 km2s, locked, winch, barwork, ls2, tourer...
Posts: 65
Joined: Mon Jan 07, 2008 1:24 pm
Location: Victoria

Post by noodle »

What engine are you running sutty
Posts: 26
Joined: Sun Aug 02, 2009 6:55 pm
Location: Melbourne

Post by Holtrol »

I’d say 4.3 for 33s & 4.6 for 35s would be perfect. 4.3s Would be a good compromise overall. I wouldn’t go any higher than the 4.6s because you will suffer on the open roads, especially when running 33s. Try what you have got & work it out from there.
Posts: 65
Joined: Mon Jan 07, 2008 1:24 pm
Location: Victoria

Post by noodle »

I had 4:3's on my gu ute 4.2td for 35's and they were perfect. I thought that with the 6l having a bit more grunt 4:1's would be closer. I guess ill just have to wait and see
Posts: 26
Joined: Sun Aug 02, 2009 6:55 pm
Location: Melbourne

Post by Holtrol »

With 35s & 4.11s you will be on about 1800rpm at 100k’s. I think that’s too low for a heavy truck. It might have more grunt than your diesel but not at 1800rpm. 2200 to 2500rpm at 100k’s would be good, the v8s like to rev.
Posts: 109
Joined: Fri Jul 01, 2005 6:44 pm
Location: broken hill

Post by gouldy »

I run 35's and 4.1's with an ls1 . Its was perfect when it was a N/A engine and its still perfect with forced induction on it. Just go with the 4.1's and if your going to use 37's go for the 4.3's or 4.6's.

Cheers
Gouldy
GQ. Supercharged LSX 427, 500rwkw. camtech cam,90mm Holley Throttle Body. twin 4"exhaust, big fuel system, King bypass shocks and bumpstops.
Posts: 1768
Joined: Sun Mar 14, 2004 11:51 am
Location: Weipa

Post by crankycruiser »

i also run 4.1's on my 80 and 37's.. perfect combo if ya ask me :)
80 xtra cab
Supercharged LS1, Locked n shit

80 Wagon, TD Tourer, locked, Interco 35s, G turbo
Posts: 121
Joined: Wed Dec 24, 2008 6:39 am
Location: pomona, sunny coast

Post by grinch2 »

i ran 4.1 with auto and ls1 it was good combo with 35's if any thing if you need lower off road go transfer gears.
Posts: 36
Joined: Wed Apr 15, 2009 10:09 pm
Location: Sunny Qld

Post by str8up »

Holtrol wrote:With 35s & 4.11s you will be on about 1800rpm at 100k’s. I think that’s too low for a heavy truck. It might have more grunt than your diesel but not at 1800rpm. 2200 to 2500rpm at 100k’s would be good, the v8s like to rev.
I think you will find the ls2 will have much more torque then a td42t at 1800rpm if you have a look at the power curves
Posts: 26
Joined: Sun Aug 02, 2009 6:55 pm
Location: Melbourne

Post by Holtrol »

Image
Image
Posts: 190
Joined: Wed May 21, 2008 3:55 pm
Location: Coffs Harbour, NSW

Post by PacMan »

Image

@Holtrol: Here is a power curve of a LS2. Your image is somehow gone.
I think you are getting confused with ft lb and Nm.

Nm x 0.73756214837 = ft lb

max diesel torque is 400Nm = ~300 ft lb
Post Reply

Who is online

Users browsing this forum: No registered users and 32 guests