Dec 17, 2008, 4:17 pm · #1
After a good amount of off-road seat time I've come to the conclusion, I need a diff. Clutch or Helical? 1.5 or two way?
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Rally Diff
Dec 17, 2008, 5:33 pm · #2
clutch, 1.5way
2way if youre manly
where in tx are you rallying? i wanna join
Dec 17, 2008, 6:55 pm · #3
rage @ Dec 17 2008, 11:33 AM
clutch, 1.5way
2way if youre manly
yea I'm thinking 1.5 to keep the rear more controllable going into corners?
rage @ Dec 17 2008, 11:33 AM
where in tx are you rallying? i wanna join
My family ranch, a section of it is leased out to a rock crushing company, so there's a giant quarry and large gravel paths for trucks. You're more than welcome if you're near 78610
This post has been edited by Bob Loblaw: Dec 17 2008, 06:56 PM
Dec 17, 2008, 6:56 pm · #4
Yeah a helical/torsen is probably better suited for pavement.
Dec 18, 2008, 2:07 am · #5
helical/torsens are good for no maintenance diffs
the best stuff always needs maintenance (IMG:style_emoticons/default/sad.gif)
i would come rally, sounds fun but, im in houston.
Dec 18, 2008, 3:41 pm · #6
The clutch type would seem ideal over the HSLD in low traction, since the HLSD works better for higher grip applications. I'm not sure how much breakaway torque you would need also for offroading. I'd look up some other dirt/gravel/low traction setups to get an idea of what you need rather than just getting an LSD that is a 1.5way or 2way.
If you have an R200 with the 12mm ring and pinion, look into the 240sx w/ open diff LSDs.
If you have the R180(and also R200), contact Precision Gear for their Power Brute CLSDs. Guys on hybridZ say those units are identical to the z31 CLSD(r200). They also said it was around $500ish too but I'd email or try to find some prices on it to see if it's still cheap.
Another very cheap and BAD option is to get a Phantom Grip. You can google that and find all the reviews and feedback you want haha. It's like starting a welded vs non welded diff argument all over again.
Dec 18, 2008, 3:46 pm · #7
Weeellllddeeeerrrr
(IMG:style_emoticons/default/biggrin.gif) Are you replacing your Supra?
Dec 18, 2008, 5:18 pm · #8
DeathAndMajesty @ Dec 18 2008, 09:46 AM
Weeellllddeeeerrrr
(IMG:style_emoticons/default/biggrin.gif) Are you replacing your Supra?
welding is not even an option. Supra is being replaced, sort of. The supra was never built with the intent to rally, plus I need something with less horsepower right now. Breaking traction is not the problem, it's already ass happy when I'm on the brakes entering corners, I just cant get up and out of some of the tighter corners.
Dec 18, 2008, 7:50 pm · #9
mod_mastas summed up what my thoughts were on the differences between a torsen and a clutch, and which is better for what application. Hung aren't you planning on gripping the pavement? I think by your own explanation you'd be going with a torsen type.
Dec 18, 2008, 9:19 pm · #10
mod_mastaz @ Dec 18 2008, 09:41 AM
The clutch type would seem ideal over the HSLD in low traction, since the HLSD works better for higher grip applications. I'm not sure how much breakaway torque you would need also for offroading. I'd look up some other dirt/gravel/low traction setups to get an idea of what you need rather than just getting an LSD that is a 1.5way or 2way.
by setups you mean suspension and whatnot? Honestly I'd rather not touch the suspension, it works really well now, extremely predictable, and I'd hate to throw that off. Also there's just not a ton of current RWD rally info, atleast not pertaining to s12. So right now, I'm only interested in a diff, lights, and flaps.
mod_mastaz @ Dec 18 2008, 09:41 AM
Another very cheap and BAD option is to get a Phantom Grip.
I wasn't thinking phantom grip, I was considering OBX. My buddie has had tremendous success installing them on customers hondas (well over 300hp). "Change the springs, bolts, and bearings and you're good." but I'd be able to get a 2 way clutch for 150 more. So it'd be a waste, especially if it tanks.
Dec 19, 2008, 1:07 am · #11
By setup, I mean the LSD's breakaway torque. I don't know if you would need more or less for low traction, but I would assume more, like a 60-80 ft-lb breakaway. I'll try to find out for you and let you know.
Jason, I'm going with a clutch type. The HLSD costs over double the cost of the CLSD I'm getting. Not to mention, when I mean high grip, I'm talking around the track and really good tires. From what I understand, the HLSD is useless when you break any traction, like drifting would be an extreme for this scenario. Either way, I'm going to do tarmac rallying, so the pavement is going to be dirty with sand/rocks etc and I'll never know what to expect until I'm actually driving on the road. The CLSD is more than enough for me.
Edit: I forgot to mention the clutch type doesn't mean it's only for low traction situations. A 2way clutch type with 80ft-lb breakaway torque seems to be what most race cars run even on pavement. BMW E30 race cars have a high lockup, as well as the Nismo LSD which I'm going to buy. The 2way makes learning the car more predictable, because the lockup is the same on acceleration and deceleration. It's really up to driving style, skill and preference as to which diff you run. Remember the breakaway torque is more important than a 1.5 or 2way LSD. A 2way LSD with 30ft-lb of breakaway torque could be much more comfortable and easier to learn with than a 1.5way or even 1 way LSD with 80ft-lbs of breakaway torque.
Oh and breakaway torque means how much torque it takes before the LSD starts to slip and allow the other wheel spin a different speed. Remember, it's a LIMITED slip, not a fully locked or welded.
This post has been edited by mod_mastaz: Yesterday, 01:25 AM