Auto LS1s - slow-ish?

[Grechie]

I remember riding in a VT Clubby with a Edit, DAMMMNNNN was it quick, i loved it

[XR8TickfordBoy]

I don't know why every V8 owner doesn't get 4.11 gears as one of their first mods!
Just my EF XR8 with the 185Kw AU 5Ltr + 4.11's= Traffic Light Master!
Can't imagine how much better a LS1 would be off the line with 4.11's.

[someLS1]

erm an auto ur kidding me.. first of all in an ls1 to have 4.11 gears u need an older style diff.. on top of that they come with 3.07 from factory for them to have mega high gears is stupid because they have a decent short first gear, its almost too much for them to have 3.9s let alone 4.11s which have to be housed in a weaker vn-vs diff... the cars are set up very different to an ef 5litre... im sure a manual ls1 would go decent with high gears with having the tall 6th gear

[RAVEN]

3.73 is the perfect diff in an auto LS1

[Commando]

What's the 1st gear ratio for the L460 or whatever the LS1 auto is called?

BTR is 2.39:1

[RAVEN]

4L60E (T400)

First: 3.06
Second: 1.63
Third: 1.00
Fourth: 0.70

[Commando]

3.06, wow, that's short, that's shorter than a V8 T5 1st gear isn't it? (2.95:1 I think they are?)

I can see why anything shorter than 3.7s would be a waste of time

[RAVEN]

This is holden 5 speed ratios

Getrag 5-speed Manual Transmission

For V6:

First: 3.83
Second: 2.19
Third: 1.40
Fourth: 1.00
Fifth: 0.81

For 5.0L V8:

First: 3.55
Second: 2.04
Third: 1.40
Fourth: 1.00
Fifth: 0.76

T56 6-speed Manual Transmission
For 5.7L V8:

First: 2.66
Second: 1.78
Third: 1.30
Fourth: 1.00
Fifth: 0.74
Sixth: 0.50

[Commando]

Wish my BTR has the T400's ratios And how tall is the T56 1st!

[someLS1]

3.73 is the perfect diff in an auto LS1

Yea im still tossing up between 3.7s and 3.46s all the 3.7 hsv diffs i see are around 1k but the 3.46s diffs come in all manual ss so they seem to sell very cheap around 500 bucks so im leaning towards just getting the cheaper diff its a fairly big jump as it is.. what gears does yours have?

[RAVEN]

3.73 is the perfect diff in an auto LS1

Yea im still tossing up between 3.7s and 3.46s all the 3.7 hsv diffs i see are around 1k but the 3.46s diffs come in all manual ss so they seem to sell very cheap around 500 bucks so im leaning towards just getting the cheaper diff its a fairly big jump as it is.. what gears does yours have?

3.73, I got mine from KUMBAK wreckers for $880 fully rebuilt and the have a few more. if i kick back to second at about 80kmh it will chirp, 3.73 was standard for HSV's with 6 speed manual and GTS's got 3.91. now that i think about it i should have gone for 3.91.

[Commando]

4.11 isn't too far a jump from 3.91 though

[someLS1]

Wats yours like on the freeway and all that im not a softy when it comes to gears i had 3.7s in my el.. but it just seems from the revs they do at 110 and all that that it would be mega loud with 3.9s i reackon you should just stick with 3.7s.. enough with the 4.11s they dont fit why waste all the time trying to get 4.11s in when u can get a mail order tune for a couple of hundred bucks and get way better performance then dirty 4.11s

[RAVEN]

Wats yours like on the freeway and all that im not a softy when it comes to gears i had 3.7s in my el.. but it just seems from the revs they do at 110 and all that that it would be mega loud with 3.9s i reackon you should just stick with 3.7s.. enough with the 4.11s they dont fit why waste all the time trying to get 4.11s in when u can get a mail order tune for a couple of hundred bucks and get way better performance then dirty 4.11s

1]This is calculated using the stock 6200rpm limit as the gear-change datum.
2] Transmission Ratios:- 1st] 3.06 2nd] 1.62 3rd] 1.00 4th] 0.70


Gearbox:- 4L60/65-E & 3.07 F-D
Tyre:- 1990mm Rolling Circumference (235/45 x 17 & 235/40 x 18)
---------------------------------------------------
Top Gear gives 55.561 KPH/1000 RPM and a top speed of 344.477 KPH at 6200 RPM

Engine speeds in top gear:-
40 KPH = 720 RPM 50 KPH = 900 RPM 60 KPH = 1080 RPM 80 KPH = 1440 RPM
100 KPH = 1800 RPM 110 KPH = 1980 RPM 130 KPH = 2340 RPM 160 KPH = 2880 RPM

Top Speed in 1 gear = 78.828 KPH
And changes into 2 gear at 3294 RPM dropping 2906 RPM
Top Speed in 2 gear = 148.390 KPH
And changes into 3 gear at 3815 RPM dropping 2385 RPM
Top Speed in 3 gear = 241.134 KPH
And changes into 4 gear at 4340 RPM dropping 1860 RPM
Top Speed in 4 gear = 344.477 KPH
================================================== ======

Gearbox:- 4L60/65-E & 3.46 F-D
Tyre:- 1990mm
---------------------------------------------------
Top Gear gives 49.298 KPH/1000 RPM and a top speed of 305.648 KPH at 6200 RPM

Engine speeds in top gear:-
40 KPH = 811 RPM 50 KPH = 1014 RPM 60 KPH = 1217 RPM 80 KPH = 1623 RPM
100 KPH = 2028 RPM 110 KPH = 2231 RPM 130 KPH = 2637 RPM 160 KPH = 3246 RPM

Top Speed in 1 gear = 69.942 KPH
And changes into 2 gear at 3294 RPM dropping 2906 RPM
Top Speed in 2 gear = 131.664 KPH
And changes into 3 gear at 3815 RPM dropping 2385 RPM
Top Speed in 3 gear = 213.954 KPH
And changes into 4 gear at 4340 RPM dropping 1860 RPM
Top Speed in 4 gear =305.648
================================================== ======

Gearbox:- 4L60/65-E & 3.73 F-D
Tyre:- 1990mm
---------------------------------------------------
Top Gear gives 45.730 KPH/1000 RPM and a top speed of 283.524 KPH at 6200 RPM

Engine speeds in top gear:-
40 KPH = 875 RPM 50 KPH = 1093 RPM 60 KPH = 1312 RPM 80 KPH = 1749 RPM
100 KPH = 2187 RPM 110 KPH = 2405 RPM 130 KPH = 2843 RPM 160 KPH = 3499 RPM

Top Speed in 1 gear = 64.880 KPH
And changes into 2 gear at 3294 RPM dropping 2906 RPM
Top Speed in 2 gear = 122.133 KPH
And changes into 3 gear at 3815 RPM dropping 2385 RPM
Top Speed in 3 gear = 198.466 KPH
And changes into 4 gear at 4340 RPM dropping 1860 RPM
Top Speed in 4 gear = 283.524 KPH
================================================== ======

Gearbox:- 4L60/65-E & 3.91 F-D
Tyre:- 1990mm
---------------------------------------------------
Top Gear gives 43.624 KPH/1000 RPM and a top speed of 270.471 KPH at 6200 RPM

Engine speeds in top gear:-
40 KPH = 917 RPM 50 KPH = 1146 RPM 60 KPH = 1375 RPM 80 KPH = 1834 RPM
100 KPH = 2292 RPM 110 KPH = 2522 RPM 130 KPH = 2980 RPM 160 KPH = 3668 RPM

Top Speed in 1 gear = 61.893 KPH
And changes into 2 gear at 3294 RPM dropping 2906 RPM
Top Speed in 2 gear = 116.511 KPH
And changes into 3 gear at 3815 RPM dropping 2385 RPM
Top Speed in 3 gear = 189.330 KPH
And changes into 4 gear at 4340 RPM dropping 1860 RPM
Top Speed in 4 gear = 270.471 KPH
================================================== ======

Gearbox:- 4L60/65-E & 4.10 F-D
Tyre:- 1990mm
---------------------------------------------------
Top Gear gives 41.603 KPH/1000 RPM and a top speed of 257.937 KPH at 6200 RPM

Engine speeds in top gear:-
40 KPH = 961 RPM 50 KPH = 1202 RPM 60 KPH = 1442 RPM 80 KPH = 1923 RPM
100 KPH = 2404 RPM 110 KPH = 2644 RPM 130 KPH = 3125 RPM 160 KPH = 3846 RPM

Top Speed in 1 gear = 59.025 KPH
And changes into 2 gear at 3294 RPM dropping 2906 RPM
Top Speed in 2 gear = 111.111 KPH
And changes into 3 gear at 3815 RPM dropping 2385 RPM
Top Speed in 3 gear = 180.556 KPH
And changes into 4 gear at 4340 RPM dropping 1860 RPM
Top Speed in 4 gear = 257.937 KPH

================================================== ======
================================================== ======

[RAVEN]

A4 -------3.07--------3.46-------3.73-------3.91
40kph = 716rpm.........807........... 870..........912
50kph = 895rpm........1008..........1087.........1140
60kph = 1074rpm...... 1210..........1305.........1368
80kph = 1432rpm.......1614..........1739.........1823
100kph = 1790rpm......2017.........2174..........2279
110kph = 1969rpm......2219.........2392..........2507

[someLS1]

see 2500rpm @ 110km/h seems like way too much 3.7s pretty much sounds perfect just over 2k @ 100kms stick to that man i reackon

[RAVEN]

yeah, i think your right, im going to buy 3600-4000 stally for it next and that should get it going a bit better off the line.

[Commando]

see 2500rpm @ 110km/h seems like way too much

I could see how it would be a problem with a droney exhaust. Mine (BTR + 4.11s) does 2250rpm@100kph & 2500rpm@110kph, however it's nice & quiet though.