ScoobySport (SdB)

You're welcome Steve, any time

That's pretty much it. In a straight line, and if you don't spin any wheels you'll probably end up with about 50/50, but as soon as you start to satturate a tyre or turn, etc, everything changes.

No need to apologise at all, I didn't / don't take that kind of thing as an insult!! One of the biggest perpetuators of vehicle dynamics myths is peoples willingness to just believe what they're told rather than questioning it until they understand. Unfortunately, the text is incorrect about the 50/50 torque split. This is and INCREDIBLY common misconception, so this is not necessarily a reason to disbelieve anything else that the book says. But I'll try to explain. If you imagine a locked diff. The two shafts are forced to turn at the same speed. Now.. imagine you clamp one of the shafts solid so it can't move. Now try to put torque through the other shaft.. results... zero torque is tranfered through the other shaft. Now loosen the clamp slightly so the shafts just start to creep round a bit.. it would take very little effort at the other shaft to stop it turning. So you have a tiny bit of torque being transfered through that shaft, and lots through the one being clamped. As you loosen the clamp more and more, you free up more potential torque at other shaft. So.. if you take this example and say the fronts are on ice, and the rears on sticky tarmac, the front will not be receiving any real torque to speak of, but the rears will be transmitting all (or most) of the torque. As you can see, the only way you could get 50/50 is if you happen to have equal resistance on the front and rear shafts. Not sure if that explains it? Feel free to ask away if it doesn't All the best Simon

LOL @ Phil I've been wrong before!! You might find that the book basically says the same thing, but is misleading (accidentally) by the wording it uses. It's a very counter intuitive subject. Cheers Simon

What does your book say?

Sorry, just to clarify (which I forgot to do in my originaly post!!).. there is no way to force a 50/50 split using a dccd. the only split you can force is the 66/34 split by leaving it open. Cheers Simon

When fully open the torque split (depending on the gearing - but I think this is the case for all with the DCCD) is about 66/34 rear/front. Fully locked, the two shafts must turn at the same speed (assuming you have not overcome the maximum braking torque of the diff). It is theoretically possible for 100% torque to go to the back or front, but effectively means that torque will be delivered to the end with the most grip. In between fully open and fully locked, the dynamics are much more complicated.. in the open mode, torque can be lost due unlaiden wheels / slippy patches, etc.. and theoretically, no torque can be lost (through the centre diff) while it's locked. In partial lock you are *kind of* limiting the minimum torque that will stay in the system, and also reducing the general torque bias to the rear, but increasing the potential torque difference. It's a horrible thing to try to get your head round! Cheers Simon

Hi Robbie Is this a genuine scoobysport back box? If so, where did you buy it from? The scoobysport silencer has been very carefully designed so as not to interfere with anything under the car, so if it does, I would really like to know about it. All the best Simon

Hi Gezmondo We don't have garage / fitting facilities I'm afraid, we are purely research, design and development. There will however be more news soon on the fitting / set-up side All the best Simon

Hi Tony We are mid development on three major new projects which will be stunning. Unfortunately I am unable to release the information just yet as to what they are, but all 3 are true performance equipment using WRC technology and adapting it for road use. I would expect the first of these to be available within the next 2 months. All the best Simon

I would just like to thank all our customers for what has been one of the most hectic weeks of my life - during our opening week offering the ScoobySport performance exhaust systems. The response and demand has been fabulous to the point where we have depleted all of our stock and just about all of the stock and production capacity this week at Janspeed. For this reason there will be about a 2 day delay in deliveries for orders placed over the next week (for which I apologise) as Janspeed ramp up their production side in order to cope with the huge demand. Thank you once again to everyone who trusted us and gave us a chance to show what customer service is all about. I'm delighted to have received so many emails of praise for the system and service, and look forward to continuing this onwards. All the best Simon