Jump to content
SAU Community

Recommended Posts

My car has 4.3s. It's too short for my liking. My car tops out at 270kph at racetracks (not the road before you all jump in).
It's ok on the road (twisties and freeway alike), but if you have anything north of 400whp its probably not a great plan.

If I could be bothered/have the money I'd get them shortened.

1 hour ago, Steve85 said:

My car has 4.3s. It's too short for my liking. My car tops out at 270kph at racetracks (not the road before you all jump in).
It's ok on the road (twisties and freeway alike), but if you have anything north of 400whp its probably not a great plan.

If I could be bothered/have the money I'd get them shortened.

Yes especially as OP is not building a track car. Open road cruising at 3000 rev/min will soon become tiresome...even 4.1 is about 2700. Look for a complete GTR rear end ( I found one for $1200) and then you get the LSD, the axles, alloy hubs and 2 pot brakes.

  • Like 1
14 hours ago, admS15 said:

1st to 3rd is quite snappy. With 420whp, traction is a bit of an issue. If you can get it to grip, it goes like a rocket. 4th, the speed just keeps piling on.

You won't notice too much of a difference vs 4.11 other than a little quicker through the gears and a couple hundred higher rpm at cruising speed in 5th.

Yeah sounds great, thanks for the heads up.

I'm looking forward to the 4.3 as when i typed it online, it seems a fair few people have tried to convert 4.1 to 4.3 so must be for good reason.

My car will never see a track anyway, i strictly drive road only and the odd beating on a dual or motorway but nothing serious.

Traction will be because your running the stock 1 wheel spinning diff still aren't you?

If i put the super Q 1.5 way in the back, being 4wd it should grip better than a stock GTR shouldn't it?

Thanks

Arr i see, sorry thought you were 4wd..  slightly lost track of who has what in these comments.

Do you have the normal Kaaz or the WPC treated super Q in yours?

And yeah tyre's do help, the super Q transformed my GTT. I have 295 35 18 PS2's on the rear which are good but i think there's still room for improvement with the supersports or the PS4S if i could get hold of them sizes.. there supposed to be mega sticky even in crap conditions.

Yeah the 4wd is the only reason iv bought this car so i can put the power down much better and use it more 

My GTT isn't worth taking out unless its a dry sunny day and the roads are better.. too much rain and greasy roads because of buses, so if it gets moist.. full boost is pointless on rwd

My M5 has a great mech LSD diff in it and they bring the torque in later so they let you put some power down before all hell brakes lose. 

 

3 hours ago, GTSBoy said:

Almost always for drag.

 Turbo cars on the road are almost always better with taller diff ratios.

100%. The last owner of mine built it for drag purposes. I'm sure of it. 

I'm busy trying to make it a more useful road car. 

My advice would be stick with the 4.1s you'll be better off in the long run, especially if you go chasing power.
But as with all things. It's your car, you do you. :)

I have a lot to do before I decide what ratio but I might try 4.3 first,

If i’m not happy I will just change to 4.1

There’s always stock for a GTR diff and rear shafts so il be fine if I need to get hold of them 

I have about 4 months to decide so il consider the 4.1 
 
If I go 4.1, Which would be the best diff to go for from the GTR’s? An R33?
 
I have Cusco diffs in mine. They're tight as anything. 1 way in the front and 1.5 in the back. They seem to do the job well.
  • Like 1

The consensus is that the best front diff is Quaiffe and the best rear diff is either another Quaiffe (for a streeter) or a Nismo pro.

There are always votes for the other brands, as per Steve above, and they are valid.  But I have a soft spot for how nicely helical diffs drive compared to tight mechanicals.

  • Like 1
13 hours ago, Steve85 said:
14 hours ago, R34GTRSilver said:
I have about 4 months to decide so il consider the 4.1 
 
If I go 4.1, Which would be the best diff to go for from the GTR’s? An R33?
 

I have Cusco diffs in mine. They're tight as anything. 1 way in the front and 1.5 in the back. They seem to do the job well.

Okay thanks, so for say the front diff, i can order an R33 GTR front diff and itll go in my 4.1 from the NEO Turbo 4wd engine or do i need to go for a stagea front 4wd diff fitment?

Rear isn't a problem as iv seen many options for that

Its the front that seems confusing.

The engine i'm buying is just down as an RB25DET Neo 4wd.. doesn't say if its from an R34 or Stagea.. I take it both diffs for the front are the same for them, just not sure if the GTR front diff internals will go in there

10 hours ago, GTSBoy said:

The consensus is that the best front diff is Quaiffe and the best rear diff is either another Quaiffe (for a streeter) or a Nismo pro.

There are always votes for the other brands, as per Steve above, and they are valid.  But I have a soft spot for how nicely helical diffs drive compared to tight mechanicals.

Iv heard of Quaiffe but don't know much about them. I take it they specialize in Helical diff's.

I was going to leave the front diff stock to begin with anyway whether its 4.1 or 4.3, but the Rear i was going to upgrade 100% 

Il have a look at the Quaiffes and have a read up

45 minutes ago, R34GTRSilver said:

Okay thanks, so for say the front diff, i can order an R33 GTR front diff and itll go in my 4.1 from the NEO Turbo 4wd engine or do i need to go for a stagea front 4wd diff fitment?

Rear isn't a problem as iv seen many options for that

Its the front that seems confusing.

The engine i'm buying is just down as an RB25DET Neo 4wd.. doesn't say if its from an R34 or Stagea.. I take it both diffs for the front are the same for them, just not sure if the GTR front diff internals will go in there

The truth here is i don't actually know if the GT-4 is the same mechanical setup at as GTR. 
This is where my knowledge starts to run out. At the risk of being an internet jerk, see if you can search here for the data. 

Surely someone else has done something similar before. (crosses fingers on ambiguous advice). :)

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

    • LOL.... a good amount of people (not all) on that continent seem to know everything and like to measure things in bananas, football fields, statue of liberties instead of the metric system lol.
    • I assume the modules are similar enough, so if you've had no issues I don't see why I would. I have tried to find a wiring diagram for the FPCM / fuel pump circuit, but I can't find it anywhere. Otherwise, I would just do some wire cutting and joining at the FPCM and give the 12 V supplied to the FPCM directly to the pump instead. If you know anyone that could help with wiring diagrams, I'd be very happy  
    • If it dies, then bypass. The task isn't difficult. I have one running on a standard R32 FPCM. That's after nearly 20 years of it running an 040, which pull substantially more current than the Walbro. They're not the same module, but I'd hope it indicates that the R33 one should be man enough for the job. I think people kill them when putting proper sized pumps on them, not these little toy pumps we're talking about here.
    • Silicone spray won't hurt anything. And if it does, that's an opportunity to put some solid steel spherical bushings in, so you can really learn what suspension noise sounds like, If you're going to try it, just spray one bush at a time, so you can work out which one is actually noisy. My best guess is that if the noise started only since putting the coilovers in, then it is just noise being transmitted up through the top mounts of the struts, and not necessarily "new" noise from bushes. But it's almost impossible to know.
    • Are you saying the 34 is SUV height, and not that we're talking about an SUV here? (because if we're talking about an SUV, you don't fix them. You just replace them when something breaks. Not worth establishing sufficient emotional connection with an SUV to warrant doing any work on one). I wouldn't jack my car up on a short little loop of 10mm steel rod poking out through a hole in the bumper bar, front or rear end. I realise that we're probably not talking about that type of loop at the front, being the one under/behind the bar on a Skyline.... but even for that one, trying to jack up on what amounts to a thin piece of steel, designed purely for withstanding a horizontal tension force, not a vertical compressive force (and so would be prone to buckling/crushing) and, my most particular bitch about it - located RIGHT AT THE EXTREME FRONT OF THE CAR, applying a load up through the radiator support panel, etc, with almost the entire mass of the car cantilevered between there and the rear wheels? Nope. Not doing that. Not on the regular. That structure out there in front of the front crossmember is not designed to carry load in the vertical direction. Not really designed to carry any load at all, really. The chassis rail that the tow point is connected to would be fine loaded in tension, as per towing. Not intended to carry the mass of the whole car, especially loaded all on one rail, with twisting and all sorts of shitty load distribution going on. No, I will happily drive up on some pieces of wood, thanks. That can only happen on driven wheels, and they are at the other end of the car, and this problem does not exist at that end of the car. And even then, I have been known to drive up on at least 1x piece of 2x8 each side at the rear, simply to reduce the amount of jack pumping necessary to get the car up high enough for the jack stands. What really really shits me about Skylines is the lack of decent places for chassis stands at either end of the car. You'd think they'd be designed into the crossmembers.
×
×
  • Create New...