Ok. So im regards to the quaife, alot of the roads around where I travel are not 100% flat, some areas can feel bumpy. So when I drive hard on these roads I can sometimes feel my Z going slightly airborne, maybe only very briefly.

Would that situation be bad for a quaife LSD? I don't want to be gunning it hard and then lose control over a small hump or dip on the road.

Probably isn't many, that would still have traction while airborne.

I went with the CUSCO 1.5 RS from Revzone who set it up and installed it for me. It is clunky and loud doing parking maneuvers but fine everywhere else and is great on the track.

Yeah RevZone are the guys who offered the Cusco to me.

The Cusco 1.5 way is definitely loud and clunky. Definitely would not recommend it for a street driven car. For a track toy/competition car it is great option though.

Interesting, but some others claim it not to be too loud.

The Quaife is fine,,,unless you're going off road or turning at bad angles (up & down)...you got to really get it in an awkward position to "teeter" up one rear wheel.
I need to jack up one side of mine to confirm it...but there was only one instance when i drove off a steep angle from concrete to grass that it appeared to not be pulling w/both rear wheels.
Other than that-i have perfectly even rear tire wear.

I was going to get the Cusco 1.5. Daelen at MA Motorsports talked me out of it, and into the OS Giken. Said the OS Giken is quieter then the Cusco and a little better on the street. That plus he gave me a great price on the OS Giken. :tup:

Pretty much exactly what I've heard. At this point though I'm not changing the LSD out again. Given the car rarely sees street duty these days and primarily sees autox events its streetability isn't high on my list of concerns.

So when you say the clutch types are clunky on super tight stuff, does that depend on speed or just the angle of the turn itself?

For example, on something like the tail of the dragon would you get clunk with the cusco or OSG?

Im running 1.5 OSG and only get occasional whine until it warms up

No, they are noise on slow speed tight turns like in parking lot or turning from a stop at a stop light. It's like having a truck in 4 wheel drive and trying to make a tight turn on pavement.

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How Long do you think it takes to install this kit, I have 2017 370 base with no lsd.

https://www.z1motorsports.com/quaife...d-pr-2397.html


I understand it does not come with shims/spacers, where can I purchase the ones I need. Thanks.

Having that new of a ~Z~ ,,,You shouldn't need any seals or shims/spacers (other than a tube of Ultra Grey/Black RTV)
Mine was a plug & play...came with new bearings already pressed on & there are only 2 thick shims (1 on each side of carrier).
Pop out both shafts,remove cover & clean all old silicone,remove 4 bearing cap bolts(mark them first) & then gently pull out,,,may take a lady-slipper & prybar.
Though you have a 17',may be easier to just install new side bearings vs. having yours pressed off & onto new one.
don't mix up the thick side shims (L/R) mark those as well.
After removing ring gear from open carrier & torquing to spec on Quaife (w/Loctite),,,just drop it back in & put the thick washers on each side of bearings (as they came off) and Torque down bearing caps to specs (i'm thinking Loctite on those as well) & "Presto"...should be set.
Ck. backlash & use some type of substance to ensure gear contact/mesh is correct.
Also,,,those side washers on each side of bearings will be snug going back into place.
as for you Question-Once out from under the ~Z~ & taking your time-you can install it into the pumpkin in 1 day easily.
You may want to up-grade your bushings; as the rear center one is oil filled & will eventually fail.
A Weekend Job is do-able for sure; pending that you have proper tools & decent work place.

:iagree: