Like what the title said. I got to sit in my cusin friend's R34 with $20K dog box, full ti exhaust, coil overs, Nismo Volks limited wheels, triple plate clutch and lets not forget boosted! Man this thing was scary. The shear amount of torque was just unbelievable. The thrust just push me back to the seat and this was only half thoatle. My cusin's friend haven't dyno or timed the car yet but I can say it dips into the 12 sec in quarter. The clutch grabs like a mother F...... but the drivability of this car sux. The car hops very first gear. At first I thought that my cusin's friend couldn't balance the clutch but he said that the take off surpose to be like this due to the box and the clutch. It's either in or out. After a few drive my cusin's otherfriend test drive the car a stuffed up the gear box or the clutch because it would only stay in neutral The car had to stay at my house over night and got towed the next morning. WEll just something that happens to me over the weekend and plus my cuz's wedding NOt everyday you see a worked up R34 GTR parked on your drive way From this little experience it makes me glad that I have a high performance N/A car that is very reliable. Sorry for the long thread.

Pat

 

hey this is not the one bought from SA is it?
Who made the dogbox?

 

No it wasn't from the SA. It was brought over by the owner himself. He got the car like that from Japan. Don't know what dog box it was but all I know is that from first gear you have to use the clutch but after that you just you don't need the clutch.

 

You can change gears without the clutch but it's a quick way to f**k up your gearbox. No matter how good you are you'll round off the dogs. Watching Bathurst on the weekend I noticed Greg Murphy changing down without the clutch (he was left foot braking). This takes a lot of skill to do as smoothly as he was, but I'll bet the team is rebuilding that gearbox as we speak.

 

Hey, what is a dogbox?

 

Where I get sent when I upset the missus!

 

heheheheehee

 

it's a straight cut gear box.... check more here www.gearbox-racing.com
there is no synchro
you can shift without the clutch but have to be very quick or you can POTENTIALLY munch the gears!!!!

You can get one made for the S2000....about $9k for 6 speeds

 

no synchros = have to rev match to grab a gear when downshifting too


wil..

 

A "dog" box is not necessarily straight cut, but it usually is. Conversely some synchro gear sets include straight cut gears. The issue is how the gears engage. In a "dog" box there is a ring which slides back and forth between each pair of gears on the output shaft. When it is pushed up against an output gear, teeth on the "dog ring" engage with similar teeth on the side of the gear. Since the dog ring is locked to the shaft and the gear normally runs freely on bearings, this engages the gear (locks it to the shaft also). In a synchro box there is a mechanism relying on friction to synchronise the speed of the shaft with that of the gear before the dog ring will be allowed to slide into place (I think - I've never seen inside one). This means you don't have to rely on the driver synchronising road speed with engine speed for the chosen gear to get smooth engagement.

In a dog box you "can" shift without the clutch, but why? Unless you're left foot braking as Greg Murphy was then your left leg is free. Changing without the clutch will inevitably round off the teeth on both the dog rings and gears. Not even the best drivers synchronise perfectly every time and if the teeth engage under torque you will wear them out. This is not cheap to replace. The purpose of the non-synchro box is not to be able to brag to your mates about changing without the clutch, it's because they are generally stronger (bigger gearsets because of no need for synchros taking up space, getting worn etc) but equally importantly you can change gears more quickly (yes even with the clutch). Why would you fit one to a road car? Only if you've got so much power than you're stripping gears. Driving around on the road with one of these has no be totally masochistic. Manufacturers use synchromesh for a reason. I also know someone who put a dog gearset in a WRX and had endless reliability problems with it getting stuck in gear etc. A lot of people claim to be able to make them but they'll be using you as a guinea pig.