e30 ls1 swap question

[1owNslo]

Hey all, what LSD is everyone using for those that have done the ls swap? currently my car has the 3.93 LSD. Hp goals on the motor are around 5-600. any insight is appreciated

[BUDNUNTA]

With the t56 and a 225/50/15(23.86 OD) id suggest 3.46, 3.73s might be too short but the 3.64 could be ok. You'll still spin in 3rd with the 3.46 easily though

To have te same gearing as a fbody you would want 3.15

[The Dark Side of Will]

Yeah, 3.91 is a lot of gear for such a powerful engine in such a light car.

[bmk]

I asked the same question about a week or so ago http://www.r3vlimited.com/board/showthread.php?t=324625

Ive been looking for a 3.46 for about 2 months now and they are next to impossible to find in LSD and if you do people want $400 for them which is a joke. So ive resorted to going with a 3.15 torsen lsd from a Z3 which can be found easily for $200

[1owNslo]

sweet! thanks fellas!! so ill have plenty of gear to play with? i want it to be driveable ya know? i dont want to be running through all the gears in no time at all...

[jalopi]

i want it to be driveable ya know?

depends on what your definition of drivable is. for track drivability anything will do, depending on the track. IMO a 3.73 is pretty nice.

for street drivability.... well, a 5-600hp v8 + sub 3,000lb car != drivable. if you're not packing a lot of tire all you'll do is light em up. if you do have enough tire you'll snap axles, ect.

not to say it isn't great; it's a blast. but definitely not reasonable.

[1990m3]

who says it has to have 500-600hp? LS1 can be 350-400hp -- I've been in two e30's with closer to a 400hp setup, it's damn quick, but no unreasonable if you can control your right foot. 600hp, that's total overkill

[1owNslo]

im just an overkill kind of person, i did and do intend on having fat(ISH) rear tires to help with traction. in terms of driveability i just mean in terms of running out of gear. a ration that will allow me to play with everything i plan throwing in it.. i dont want that feeling of.. "i know it has more but i cant get any out of her"

[jalopi]

Unless you yawn at bonafide race cars on a daily basis I don't think you'll have any issues with the car.

Play around with this site for a while to figure out what rear you want. Even with a 4.10 rear you're topping out at 124mph... in fourth gear. Sixth will take you into veyron territory as long as you've got the supporting power, aero and parts. In short: rear end gearing isn't the biggest deal when you've got a six speed with a .5 overdrive and a ton of power.

http://www.teammfactory.com/gearcalculator.php?kmh=0&tirewidth=235&tireprofile=40&wheelsize=17&tirediameter1=24.4&maxrpm1=7000&finaldrive1=4.1&gearratio1=2.66&gearratio2=1.78&gearratio3=1.3&gearratio4=1&gearratio5=.74&gearratio6=.5&trannytype=&tranny=Calculate+Transmission+1&tirewidth2=195&tireprofile2=55&wheelsize2=15&tirediameter2=23.44&maxrpm2=8400&finaldrive2=4.4&gearratioa=3.23&gearratiob=2.105&gearratioc=1.458&gearratiod=1.107&gearratioe=0.848&gearratiof=0&trannytype=

[1owNslo]

^ thanks man i appreciate it!!!