Hi guys, I constantly hear people talking about "leader gears" what exactly are they lol a silly question im sure but can only find out by asking
Lower ratio diff gears, close to a n/a diff ratio - for a TT gets you onto boost quicker from the get go. :br:
An expensive wank. A NA diff will get you very similar results for a lot less, and with easier installation.
How is it an expensive wank Martin? Guys who are at the drags wanting quicker times or faster lap times or 2860R turbos and want to get onto boost quicker It's not just a n/a diff, it's a complete subframe swap. N/a diff can take the outright 350kw power maybe more, though drag launches at 7krpm with sticky slicks, could just be a matter of time before it goes BANG.
Could be! I haven't read anything about the NA diff's taking power at the drags, but I know someone here has been using an NA diff on their TT for a number of track days with no trouble. That money would be better spent on some good slicks and anti-lag. Only if you've got money to burn and these mods already would I think leader gears would be worthwhile :\
Track is a bit of a difference... launching at the drags puts a massive strain on the drivetrain all at once, If i had big HP id want the the strength of the TT and R230, ive seen the na imput shaft shear of on numerous cars on skylines too not just zeds Average numbers NA rear, BIG numbers R230, with leaders for quicker boost and accel at the drags
I dont know for sure... if it was me id say 400+rwhp and id start to get concerned about it holding at the drags, many have done much more but i guess your gambling
^^^^ I know this Crispy but GTR has mechanical lsd.. All the kewl kids keep there R230 , All im getting at is at the drags on a regular basis i'd rather be launching a r230 with leaders over a stock r200( unless its got modded GTR diff with custom kaaz center) but then were moving away from the "should i swap in NA rear end or keep the TT with leaders"
Interesting thing, I played with some gear ratio quarter mile calculators and shear final drive ratio didn't improve times. No doubt that getting on to boost sooner has to be a good thing, but if you pick up a gear change in the process ? For instance in a TT manual you will redline in 3rd at 180 km/h, with a 4.1 final drive you will redline in 3rd at 162 km/h. That could be inconvenient. But all the racers here are flat shifting like they should. With a bit of careful tyre size selection you can extend those redline speeds, staying with 3.69 and slightly bigger tyre would cover most.
I found I was hitting the limiter in 3rd just before crossing the line in my old NA. In a TT you would def have to change to 4th with a NA diff. And +10 points for FF reference
:rofl::rofl: especially if ya granny shifting n' not double clutchin like ya should R230+leader gears+ 3k stall +full manulised auto+stickys= win at the drags
Auto ratios are a bit more forgiving but I don't think the 4.1 gears will get you that much, other then cruising at 120 km/h on the highway at 4000 RPM rather then 2500 RPM because you have lost your auto overdrive lockup with the manualised box. Makes for a very expensive drive from Sunny Coast to Willowbank. But she will be poky on boost. Just imagine the fuel !!! Without the lockup you will expend energy maintaining the viscous coupling, fuel would just be insane.
And its the rear suspension that fails to maintain a favourable angle of operation of the shafts that leads to breakage at launch.
your all asking the wrong question its not which is better, its which can be acquired cheap and chucked in if the diff lets go. If you have a NA Cradle and the diff goes you can get another dirt cheap, hell you could got through 3-5 NA diffs depending on how good you are at sourcing things for the right price. 3-5 NA diffs Vs 1 TT with Leader gears which means rebuilding the thing. Its pretty rare to break any diff lett alone 5.
Is there a difference in the angle of the half shafts between the NA and the TT at launch? From memory, before leader gears the US guys were cryo-treating the half shafts on the NA swaps because they kept breaking them.
They are called "Leader" gears because the guy in the states that gets them made is called Mark Leader
