I'd be interested to hear update on the Peugeot - I seem to recall the old Jag took a bit of work, so, I wonder how that damned torque curve can be overcome?
The Peugeot 905 Race Car won't make 300mph; it simple has far too low torque to push it much past 280mph. I've managed to break 285mph but that took quite a bit of tweaking. Certainly there isn't the tweaking room to find an extra 15mph.
In some ways the situation is similar to the Saleen S7's in that the car just seems to hit a brick wall once it reaches a certain speed. With the S7 it was only a few more mph that was required for 300mph, and even then it took obscene amounts of effort from one of the greatest high speed tuners here. Can you really imagine the 905 breaking the magic barrier when we have a full 15mph or so to find?
The only possible chance of getting this thing close is the discovery of some major new tuning approach, much like the 'power shakes' discovery for 4WD cars. Unfortunately, RWD cars seem to be much more predictable than their 4WD counterparts, and I personally cannot envisage such a discovery happening.
I tried the 905 not too long ago. It can't be fitted with Nitrous, and I only got 280-ish mph out of it after a few runs. It might be worthy, but it'll take a REALLY long time to get it perfect-and that's what it'll need to be. MasterStorm, I believe your challenge awaits.
Thanks for the compliments, but as I've detailed above, I don't believe the 905 can make 300mph. 👍
how did you do it ? 380 out of a kaira zzll awesome .. any help appericated thanks MASTER STORM pickie825491 pm me
I'm posting my response to this here so that everyone can benefit.
With the speed currently sitting at the top of our esteemed leader board, I'm not going to divulge anything specific about my setup. I can however discuss some of the approaches used in a broader sense.
With almost all 4WD cars the key to achieving high speed is a trick known as the 'power shakes'. Essentially this is an aerodynamic and driving state which the car can fall into during which it experiences phenomenal acceleration. Most players first experience the power shakes when tuning a fully loaded Subaru Impreza Spec C for quick standing 400m or 1000m times. In a high speed setup, the tactic is to make the power shakes occur at a high speed rather than a low speed, and to make them last for as long as possible (in the ZZII, I can experience power shakes from 220mph right through to 380+mph).
Unfortunately, there's no hard and fast rule for achieving these high speed power shakes. Every car is different, and even when you have a setup that is capable of the power shakes, there's no guarantee that the car will actually perform them; my Tommy Kaira setup is fairly well trained and will power shake on around 60-70% of runs, whereas my Impreza will only achieve the shakes about 5-10% of the time (and even then I have to twitch side to side rapidly to activate it).
The general approach seems to be to create a grip and aerodynamic anomaly between the front and rear of the car. I often run hard rear suspension (high spring rates) with super hard front tyres, but this is just a personal preference. I've certainly achieved the power shakes with both super soft front tyres and soft rear suspension. Many of you have also noticed my Tommy Kaira has a high front camber. This is simply to reduce the surface contact area of the tyres, thus reducing the grip; once again it's not essential to achieving the power shakes. The driving line you take will affect the chance of the shakes occurring.
For the aerodynamics, it's simply a matter of balancing ride height, downforce and ballast to hold the car in a power shaking position for as long as possible. Spring rate also plays a key role here, as that can affect the position the body will move towards as the forces from downforce increase. Many cars will have more than one aerodynamic position from which they can power shake, each with its own set of 'shake characteristics'; for example, my Tommy Kaira has a very powerful and rough power shake, whereas the setup used by I-Runner shakes much more smoothly. Knowing how each of these settings affects the power shakes is something you really have to learn yourself, and some of the things required to achieve a good setup are very counter intuitive; experimentation is essential here, as it was an experiment that uncovered high speed power shakes in the first place. Once again I must stress that every car is different; it's not like RWD cars where the same general setup can be used.
It's worthwhile remembering that a slight tap of the barrier can often 'kick in' the power shakes; whilst this is not allowed for official runs, it can make testing the capabilities of your setup a bit easier (especially if the car is stubborn to shaking, like my Impreza).
Anyway, whilst there's nothing specific above (due to the nature of shakes), it should still give you some things to think about. There's nothing here that can't be worked out from a bit of experimentation, but I feel that many high speed tuners give up too easily when it comes to 4WD cars; the information above should help you overcome that first hurdle.
On a final note, I strongly recommend that those new to the high speed tuning world stick with RWD cars first. It takes significantly longer to tune a 4WD car to its maximum potential than it does for a RWD car; its not difficult to spend a good 100 or more runs just trying to get the car to shake in the first place, especially if you don't have a lot of high speed experience to guide your tuning.
I hope this post has been helpful.
sure you can get three more miles per hour out of the old Merc rather than driving 440 yards and braking again
I'm actually spewing mcsqueegy beat the TVR record, I was less than 1mph off doing it myself and getting my first entry in the 300 club as a record!! 
Congrats to you anyway mcsqueegy. 👍
,just imagine your car shaking at 350+mph! I think i would be sick. Anyway, i've hit a wall with the Zonda LM...297.80mph. I know this can do 300 in the right hands, so can someone, please try it? Much would be appreciated
I'm not too experienced, though, so I wish you all the best 
