Jump to content
SAU Community

Recommended Posts

Hi all,

Im getting a Tomei Trax 2 way fitted this week. But i have been told if you change the cam angle you can make it a 1.5 way. Anybody done this?

Reading some info on these diffs it seems they were designed for drifters. Has anyone had one of these diffs installed? Are they very harsh to live with?

Link to comment
https://www.sau.com.au/forums/topic/308309-tomei-trax-lsd/
Share on other sites

honestly, you just get used to it... and pretty quickly....

i have a weldy in my ke70 and i dont even notice it :)

i have a 1.5 way in the r33 and that's the way to go for a car that isn't dedicated drift imho

Link to comment
https://www.sau.com.au/forums/topic/308309-tomei-trax-lsd/#findComment-5089787
Share on other sites

Hi all,

Im getting a Tomei Trax 2 way fitted this week. But i have been told if you change the cam angle you can make it a 1.5 way. Anybody done this?

Reading some info on these diffs it seems they were designed for drifters. Has anyone had one of these diffs installed? Are they very harsh to live with?

I'm not sure if you can change the cam angle in the tomei (i was under the impression that it is a fixed), however the lower the angle cam will result in mild locking characteristics, also it will reduce the chattering characteristic of L.S.D.s, reducing unexpected motion changes and increasing stability, allowing it to be used enjoyably on the street.

Nismo lsd GT lsd are all 55 degree cam angle apart from the PRO TT which uses a 45 Cam angle

Advantages of the 45° Cam Angle

A 55° drive-side cam angle in vehicles with reinforced bodies can result in the inner tire moving in a minus direction during cornering, creating drag which can result in reduced times. By reducing the lock ratio by decreasing the drive-side cam angle to 45°, tire drag during cornering is reduced and circuit times are improved. A lowered cam angle also decreases the power to each plates, providing more stable initial torque.

NISMO's Suggested Users

1. Circuit users

* Tuned cars with reinforced rear areas

* Tuning shops time trial demo cars

2. Street users

* Those who want an L.S.D. that is moderately effective on both winding roads and on the circuit

* Those who want to use an L.S.D. in street driving but dislike the chattering

So in short if you can reduce the cam angle it will still be a 2way but be more street friendly

Link to comment
https://www.sau.com.au/forums/topic/308309-tomei-trax-lsd/#findComment-5090205
Share on other sites

I'd be much more worried about putting 390rwkw down than what happens when you back off! lol

seriously though 2 ways are fine on the street... you have to be a complete muppet to spin it on lift off... if you jump on the anchors and have lots of steering lock on it will step out but very controllable

Link to comment
https://www.sau.com.au/forums/topic/308309-tomei-trax-lsd/#findComment-5090491
Share on other sites

Diff is in. Feels pretty good. Terry was able to make it a 1.5 way (near enough)

Bed it in for about 15mins as instructed, but ill give it another go later just for piece of mind that it is done properly.

Terry and the boys at Award did a perfect job and their customer service is second to none. Ended up costing cheaper than quoted which was a nice surprise.

Link to comment
https://www.sau.com.au/forums/topic/308309-tomei-trax-lsd/#findComment-5096193
Share on other sites

Diff is in. Feels pretty good. Terry was able to make it a 1.5 way (near enough)

Bed it in for about 15mins as instructed, but ill give it another go later just for piece of mind that it is done properly.

Terry, Trish and the boys at Award did a perfect job and their customer service is second to none. Ended up costing cheaper than quoted which was a nice surprise.

Fixed...don't forget Trish mate...she a classic.

Link to comment
https://www.sau.com.au/forums/topic/308309-tomei-trax-lsd/#findComment-5100482
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

    • No, you're wrong, and you've always been wrong about this. The Nismo has 2 sets of openings. One is a real 2-way, and the other is a 1-way. There is no 1.5-way possible with the ramps that they offer. A real 1.5-way does exist. That Cusco stuff I posted is a prime example. If the forward drive ramps are, say 55°, and the overrun ramps are, say, 30°, then you will get about half as much LSD effect on overrun than you do on drive. It is real, it realy works. OK, you're slightly right. The Nismo has 55° and 45° ramps on the 2-way, so it does offer less LSD effect on overrun. But, I think that just means that they've (probably) sensibly established that you do not want actually equal LSD effect on overrun. You just want "quite a lot, but not quite as much as the drive LSD effect".
    • Just wanted to unearth this and post my baby with the new front ❤️😝 Took her to my wedding rehearsal today. Next up is getting wide skirts (after wedding)
    • Yea, that is what I was getting at in my ramblings too. The nismo one actually is a 1.5 way and a 1 way. They don't do a *2* way because a true *2* way would have equal ramp angles. Or is that a true 1.5 way? Realistically I think a "1.5 way" does not actually exist. A diff can either lock in two directions or one. It also doesn't help that a LOT of people in Australia speak about 1.5 way diffs are referring to their 1 way diff.
    • Well, the trouble with that ^^ is: The configuration shown is absolutely a 1-way, not a 1.5-way. There is no way that a 1.5-way can be said to offer LSD action only on acceleration. If Nismo cannot get that right, then it is impossible to believe their documentation. That ^ is not a 1.5 way setup. That is a 1-way.   And so now I have allowed all doubts to flourish and have gone back to look at the MotoIQ video. I originally made the mistake of believing him when he said "this is a 1.5-way" at the ~6:10 mark. Because what he did was take the gear assembly out of the 2-way opening and just rotate it one place to the left to drop it into the 1-way opening. When he dropped it in there, the cam was "backwards" compared to the correct orientation shown in all other photos of that config. The flat shold have been facing the 1° ramp side of the opening, not the 55° ramp side. And I thought, "gee that's cute", but I was concerned at the time, when he put the other ring back on, that the gap between the rings looked like it was wider then in the 2-way config. And then I said a lot of things in my long post on Tuesday that could only make sense if the guy from MotoIQ was correct about what he'd done. BUT... I have now done my homework. I grabbed a frame of the video with the 2-way config, and then grabbed another with the "1.5-way" config, snipped out the cam and opening of that frame and just pasted it direct on top of the 2-way config. I scaled it so that the triangular opening was almost exactly the same height in both. AND.... the gap between the plates is wider with the cam installed in the triangualr opening backwards. That is.... it cannot go together that way. There would be massive force on the plates all the time, if you could even reassemble it.  So, My statement on the matter? The Nismo diff is actually only a 2-way and 1-way. There is no 1.5-way option in it, regardless of what they say. Here's a photo of a real 1.5-way ramp opening from Cusco (along with the 1 way option). And the full set of 1 through 2 way options from their racing diff, which is not same-same as what we'd typically be using, but...the cams work the same. A little blurry, but it comes from this Cusco doc, which is quite helpful. AND.... Cusco do in fact do what I suggested would be sensible, which is to have rings that do 1 and 1.5, and 1.5 and 2. Separately.  
×
×
  • Create New...