4350 replies to this topic

[jamiewillson]

That's good Mike!!! Mine weighed about that all in last year and we didn't even bother corner-weighting it. (Unless Simon did it at some point) I've got the feeling that my car's going to be a bit of a lardass this year with all the extra parts/fluids etc. Gone are the days when it weighed 737kg's..... Still, we've got at least a couple of hundred kg's head start on pretty much everything else out there eh!!

[CHILL Gone DUTCH]

I don't no how I got on to this thread

Edited by Chill, 06 March 2013 - 01:06 PM.

[Mike (Cliffie)]

As you may have read, we are re-designing the aero for this year and I have already posted a pic of the new rear wing.

Liam at MMG has designed us a new rear diffuser which will be for race only and the prototype is now ready and below are a few pics. It is longer than a standard MMG 5 fin to better deal with the air passing under the car and wider to take in the area of dead air that exists with standard diffusers adjacent to the rear wheels.

[Wreelybro]

Need to get rid of unnecessary wiring

And that poxy alarm if it's not gone already

[chrisvx220]

Do you have any pics of the diffuser off of the car or looking up from underneath?

[chris_uk]

Arnt them fins a little shallow? Cant see very well on my phone tho.

[Mike (Cliffie)]

Fins are that depth due to our lower ride height and reduced ground clearance.

[chrisvx220]

Arnt them fins a little shallow? Cant see very well on my phone tho.

Haha I said that too on fbook forgetting Mikes car is a lot lower now, dont think they can go deeper on Mikes

[chrisvx220]

Fins are that depth due to our lower ride height and reduced ground clearance.

Beat me to it

[chrisvx220]

double diffuser, any reason why you have only used that design between the middle fins and not the others aswell? Any pics of the extension behind the wheels?

[chris_uk]

Ah thats fair enough then Have you used 340r top front wishbones now we are running such a low ride height?

[Mike (Cliffie)]

Ah thats fair enough then

Have you used 340r top front wishbones now we are running such a low ride height?

No need with the new EP Tuning Hubs.

[chris_uk]

Ah cool

[jamiewillson]

Looks great. What's the ramp angle on it out of interest?

[Scuffers]

Ah thats fair enough then

Have you used 340r top front wishbones now we are running such a low ride height?

OK, have to ask....

what makes you say/think this?

(as in what do you think 340r top wishbones are compared to normal ones?)

Edited by Scuffers, 07 March 2013 - 04:17 PM.

[Winstar]

Fins are that depth due to our lower ride height and reduced ground clearance.

given that IIRC you're at a rear ride hight of 60mm then they should extend to the min ground clearance allowable in the regs of 40mm to cut as much leakage between channels as much as possible, they also really need to extend as far forward as possible. I've no idea WTF that in the middle is supposed to be, it won't act as a double diffser or add any negative pressure that's for sure. Sorry to be netgative but from the looks of it the majority extra downforce from this will be due to weight.

To answer jamies question the ramp anlgle should be dependent on the ride hight in that for a standard ride hight you can keep a ramp of 12 or more degrees and the flow won't seperate away however if you drop that to 50-60mm then you need a much lower angle like the classic 7 degrees to keep the flow attached.

[P11 COV]

The disparity left to right over the rear axle is due to the engine sitting to the right and the gearbox (much lighter) to the left.

Didn't weight it last season sadly but I reckon we were probably about 30-40KG heavier.

Weight is without driver or fuel.

Sorry if this is a stupid question as I don't really know a lot about this stuff, but when you use corner wieghting to set up the geo of the car should you have driver on board to set it up properly?

[Scuffers]

Sorry if this is a stupid question as I don't really know a lot about this stuff, but when you use corner wieghting to set up the geo of the car should you have driver on board to set it up properly?

depends on what your trying to do...

in this case, I just put it on the scales to see what the total was, I was not doing a geo or the like, I was just getting a base-line of what I am dealing with (so that I can then decide on spring rates, heights, etc)

Now, Obviously I set the spring platforms beforehand, at what I guessed would be about right (in terms of ride hight etc), and then plonked it on the scales, that picture is what I was greeted by.

this says two things to me:

1) the car is somewhat lighter than I expected (always assumed the VX weighed a lot more than this - although the Turbo probably does)
2) spending hours corner-weighting is pointless, just set the pre-load right in the first place and the corner weights will be right.

Yes, once Mike get's in it, they will change, but so what? you cannot change that without physically moving weight about, and once the car is on a track and moving, the wheels are never going to be level anyway, all that's important is that the balance remains even (front/back/side/side).

[chris_uk]

Ah thats fair enough then

Have you used 340r top front wishbones now we are running such a low ride height?

OK, have to ask....

what makes you say/think this?

(as in what do you think 340r top wishbones are compared to normal ones?)

because mr scuffers, the 340R front top wishbones have an angled top ball joint housing.. so as you lower the car and the wishbones point upwards the angle of the housing allows the ball joint to sit vertical and not at an angle like a straight wishbone would do.

[Scuffers]

Where did you get that from? 340r wishbones are the same as any other s1 elise ones just painted silver. S2 and VX ones are only different in that they are slightly longer (fronts that is).