Tillis3

They sure do look good, though!

Well, it appears you're right. Suppose I should have done more of my own research instead of trusting and parroting. One of those scenarios where you get excited because its what you want to hear and choose to believe it. Do you have any experience with a Helical diff on track? More specifically, the Quaife ATB?

It’s sitting in my garage waiting for me to swap fluids! I found some interesting information regarding ATB diffs offered by Quaife and spoke to a guy who went from a Tomei Trax 1.5 way to a quaife ATB 2 way… says he heard everything in the Tomei on the street and hears almost nothing on the ATB. Since that’s the first direct experience I’ve come across, I’ll go that route if the thicker fluid doesn’t alleviate things.

I've heard so many mixed things on the Nismo. I think there is more to these situations than brand- maybe diff tuning and fluid play larger roles here. Some people claim they are silent and perfect and others say its just like the one I have... Good call out on the different ratio's. After some more research, I think your assessment is spot on. I am going to aim for a 3.7 when I make the switch. Are you suggesting a 32 GTR center in the rear differential? I haven't come across this topic yet.

Great advice, Murray- Thank you. I will give this fluid a shot before making a big pricey move to a new differential. I would give a lot to get some noises I'd consider "cute" ha. The noise is more like you described in the latter- Violent! Passenger's think my car is broken haha.

Awesome to hear! How does it feel and sound on street? How does it operate on the track? For diff oil, I went with the recommendation of a local shop about 5 years or so ago. I'm fairly certain it was a GL-5 75-90 Redline fluid. To my knowledge, there is no LSD additive which I have heard can potentially quiet it down a bit.

Hey everyone. I'm looking to change the rear differential in my 91 GTST Type-M. The car is RB25neo swapped with a CD009 6 speed transmission from a 370z. The car currently has a very aggressive 2 way differential- It was the only modification on the car from Japan when I got it 8 years ago so I am not sure on the brand. It feels incredible on track but it makes horrendous noise and chatter on the street. Trying to find a happy medium. I am looking for a longer gear ratio, currently a 4.36, maybe something around 3.7-4.0. I am looking for recommendations on brands and options from users with real experience. The car is built around weekend/mountain driving with 3-5 track days a year. I've done some significant research on various forums, more specifically, on the Nismo GT Pro, OS Giken, and Quaife. They all sound great on paper but haven't been able to talk to someone with real life experience using them. Thanks in advance!

Interesting. My tuner was telling me that I should not do this when I previously understood that to be an option. Sounds like everything works well for you. Is the information to set this up available through haltech's website or on the IC-7 dashboard software?

Does yours show gear input? Like what gear you’re in?

Do you have an IC7?

@TurboTapin I am running a very similar setup to you. I have a CD009 with a Haltech 2500 and iC7. Did you ever figure out a way to get the gear input from the transmission? My r32 gtst does not have abs to pull that data from and I am using a Cusco 4.56 2 way diff not a z diff.

I will do this next week and report back but timing does not seem off.

It’s a fabbed 3in downpipe to a 3in ISR (cheap) catback. It’s all straight pipe and 1 can at the rear. I have found several examples of the same turbo making more power on less boost with 98 RON or similar (non ethanol) fuels. But, maybe I am wrong or getting bad info. 19 psi seems like a lot for that power.

I know this thread is quite old but I wanted to chime in. I currently have a rb25 neo with a g30-660 and I am getting some wonky results. I’m hoping someone smarter than myself can offer some new info. car made 373whp/300tq at 19psi on 93 octane. Tuner said the vehicle suffered from “too much back pressure” and was causing low numbers. This is peculiar considering the car is a 3” system and that should be plenty for that power level. Boost comes on exceptionally quick and the throttle feels more like an on/off switch. I feel virtually no spool. Stock Comp/stock cam rb25neo Plazmaman Plenum DBW ID1050x Haltech 2500 6boost manifold g30-660 1.01 A/R 93 octane Thoughts?