Jump to content
SAU Community

Recommended Posts

the only difference the kaaz run-in makes is that rather than having 1000km of your diff feeling harsh because it hasn't worn in yet, you have a yak in the bushes after making yourself dizzy and the diff is fine :(

I wouldn't do half an hour of figure 8's... got better things to do with my time. would consider doing an old pac run to bed in a diff though :O

Link to comment
https://www.sau.com.au/forums/topic/139692-diff-run-in/#findComment-2604989
Share on other sites

I did my run in of my Cusco 2 way at the top of Old Pac in that big car park. I was stopped by coppers, I told them what I was doing... he then proceeded to tell me that he used to be in Mark Skaife's pit crew when he raced the 32...

I guess I was just lucky :O

But yes the throwing up is worth it, like any brake pad and/or clutch, if you dont bed them in evenly one side will lock sooner than the other, you can get vibration and all sorts of shit, trust me... i've seen it all!!!

Even if you dont, let me put it this way: Its a $1000 part and its half-an our of your life... what have you got to loose? :(

Link to comment
https://www.sau.com.au/forums/topic/139692-diff-run-in/#findComment-2605260
Share on other sites

yeah, but me and a friend found that after bedding in the kaaz diff's properly and changing the oil, they still have a very harsh engagement. Not that i find that a problem (well.. my car has a locker).

We did it in dandy stockyards, which is right on a major road, we didn't get stopped or anything.

It's easy to explain your way out of, just print out the bed-in instructions and show them to the cop!

Link to comment
https://www.sau.com.au/forums/topic/139692-diff-run-in/#findComment-2609682
Share on other sites

arent mechanical diffs illegal? (just thought any sort of mod was illegal :P)

or should i get a tradeplate and do it late at night and then tell the cop its a track car?

and did you guys put shitty tyres on the back for it? or didnt it make much difference with wearing your tyres

Edited by salad
Link to comment
https://www.sau.com.au/forums/topic/139692-diff-run-in/#findComment-2609686
Share on other sites

arent mechanical diffs illegal? (just thought any sort of mod was illegal :P)

or should i get a tradeplate and do it late at night and then tell the cop its a track car?

and did you guys put shitty tyres on the back for it? or didnt it make much difference with wearing your tyres

it's a grey area.... some gtr's came with mechanical lsds from factory, and i'm sure there were other cars with them stock. Most cops wouldn't know the law on that one.. just find a quiet carpark somewhere on a sunday, i doubt you'll have any problems. I mean, i've cleared defects with a fully locked diff before, and the roadworthy guys have said that there is nothing in the book that says you can't have a locked diff.

It won't wear tyres enough to be a concern, if you're hitting the track / twisties hard, tyre wear will be 10-20 times what it is doing low speed figure 8s

Link to comment
https://www.sau.com.au/forums/topic/139692-diff-run-in/#findComment-2610589
Share on other sites

i've cleared defects with a fully locked diff before, and the roadworthy guys have said that there is nothing in the book that says you can't have a locked diff.

wow. that's quite surprising - my R31 had a locker and I always assumed it was highly illegal.. the way it behaved in the wet it should be! (anything that's that much fun surely has to be against the law haha) ;)

Link to comment
https://www.sau.com.au/forums/topic/139692-diff-run-in/#findComment-2611201
Share on other sites

lol, yeah kinks - I know what you mean.

my street car has had a locker for 2 years, and i always say this when people ask me if it's dangerous.

"Is it dangerous NOT to have an LSD?"

if you are in a situation where your car is going sideways, wouldn't you want to reliably and predictably be able to put the power down?

A locker is as reliably and predictable as you can get, stock lsd's and very worn mech diffs have a habit of crapping out (single spinning) at the worst possible time.

They take a bit of getting used to, and can be dangerous for a novice, but i like to be in full control of my car, and i don't get that feeling with a viscous, or even mechs which can be hard to predict when they will lock up.

Link to comment
https://www.sau.com.au/forums/topic/139692-diff-run-in/#findComment-2611375
Share on other sites

t04 gtr is very wrong. If you actually do the run in, you notice that it actually changes a lot.

When you first put the new diff in, you can tell it isn't runnign well. it feels, well, not run in.

After you do the first oil change after runin, the oil is filled with metal shards.

I would definitely do it.

It won't get any cop attention. a donut or butnout is that last thing you want to do. if a cop comes, just say i'm not doing anythign illegal, feel free to watch me. Show them the run in instructinos, just say i'm just driving in a figure 8, not doing donuts.

If you don't run it in, it'll rattle and clunk more.

Link to comment
https://www.sau.com.au/forums/topic/139692-diff-run-in/#findComment-2611976
Share on other sites

hoenstly, it doesn't do much to your tyres. you'll notice that it'll always crab walk when you do tight turns even after the run in anyways.

But it only does it at slow speeds, so tyre wear is not that bad.

I mean, do you do the odd skiddy/powerover here and there? I do, and that'll wear the tyres more.

Link to comment
https://www.sau.com.au/forums/topic/139692-diff-run-in/#findComment-2611983
Share on other sites

if you are in a situation where your car is going sideways, wouldn't you want to reliably and predictably be able to put the power down?

A locker is as reliably and predictable as you can get, stock lsd's and very worn mech diffs have a habit of crapping out (single spinning) at the worst possible time.

They take a bit of getting used to, and can be dangerous for a novice, but i like to be in full control of my car, and i don't get that feeling with a viscous, or even mechs which can be hard to predict when they will lock up.

That's the one benefit of a locker, if you put your foot down around a corner you were going sideways - no ifs, buts or wondering when it would come out it always did, right on cue.

The same handling trait in the hands of a novice will result in them reversing the car into a pole at high speed, and the other thing lockers do is give you horrible understeer when you're off-throttle. That almost caught me out when I overcooked a corner, you really have to throttle them through the twisty stuff.

The stock viscous LSD is reasonable (I'm fortunate enough to have one in great nick). I will eventually be upgrading to a 1.5 way mechanical though.. ;)

Link to comment
https://www.sau.com.au/forums/topic/139692-diff-run-in/#findComment-2615308
Share on other sites

yeah, there are a few people drifting with viscous lsd's they work ok for a while, and then it gets really ugly. I know of a few people who have hit stuff due to a single spinning viscous (when drifting), and it's ugly.

My skyline's lsd was stuffed when i bought it, it could do donuts in second gear for about 10 seconds then crap out and start going straight.

Link to comment
https://www.sau.com.au/forums/topic/139692-diff-run-in/#findComment-2616533
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • There are several aftermarket options available, from not-too-painful moneyhttps://justjap.com/collections/driveshafts-bearings/products/d-max-reinforced-replacement-rear-driveshaft-set-fits-nissan-s13-s14-s15-r32-r33-r34-c35 and  https://justjap.com/products/crank-motorsport-billet-rear-axles-fits-nissan-skyline-r33-gts-t-r34-gt-t?srsltid=AfmBOorQk4xkGUa98kO7v2ePLUiNt-HRrM2AwWNw9mbSIVE1ujBVwY__, all the way up to The Driveshaft Shop https://driveshaftshop.com/skyline-cv-axles/
    • Yeah based on old XRC5964S specs, it looks to be roughly GTX3576R sized? But this 5964S compressor will flow 90lb airflow somewhat similar to the compressors in both the GTX3584RS or G35-1050.. I fully expected the 0.64 rear A/R to choke up top - seems way too small from typical convention - but these are seemingly beneficial over the prior 0.82 results.. Be interesting to see if he comments on the EFR question in that thread - he mentioned in a prior video that BW EFR's were the "cats pajamas 10 years ago", but by the sounds of things all his kits have been using Xona for quite a while now.
    • Yeah it’s still got the oem manual gearbox and clutch, only kinda mods are a blow off valve, coil overs, and a aftermarket intercooler. Also had it for about 2 months now with a lovely midnight purple paint on it.
    • Yeeeppp, been following a lot of the testing on the latest Xona stuff and there are some mental results.  He also went over 1000hp @ 4 hubs on his Mainline with a XRE6364S (63mm) which was also well into the 20psi range before 4000rpm on a 2.5. Crazy stuff. Fwiw the XRE5964S is basically the modern equivalent of their old HTA3582 - would drive nicely enough on an RB25 or 26, but proven capable of a huge amount of power if you want to spicy with rpm tho even at sane boost levels will make stout numbers 
    • The axels in my R33 seem tired, and have a bit of play in them. I cannot find any new of course, not interested in buying used, but I am looking to see if anyone can identify some cross compatible axles. In the states I have seen suggested for S chassis the J30 axles, however for the skyline (as best I can tell) the lengths are about an inch off (2.5cm) on both sides. R33 my measure L 22" R 24.5" GPT L 22.5" 24.25" J30 L 23.5" 25.5"  so shaft length is probably an inch wider. Not sure if someone has another still remanufactured option besides the J30. I figured worst case I can buy a pair tear them down and swap the center shaft. My other option was reaching out to GSP to see if they cannot piece together a set, since the axle stubs are still manufactured, I wouldn't think it be that hard to find a shaft or make a shaft work. 
×
×
  • Create New...