’Evo’ at the Ring

Just browsed through this months Evo, it seems
they didn't quite manage the quest for under
8minutes for a full lap, they did a best (on a closed
track) of 8.23 with Dirk "whatshisname" at the wheel.
I think the norm is to minus 20 secs for a B2G time ,
so that's 8.00 or so ???

I won't say "told you so" nah , I will. Good effort
though with a e36 M3 GT.

Also lap record broken now set to 6.55 for a road car
by a Radical, on trackday tryes, They reckon take off
20-30 sec (i think) for slicks.

Edited by 215DMX

Bridge to gantry.

 

When they started this project, I was expecting more. But then as a certain "expert specialist" were involved from the start, maybe I should have known it would be monkey'd together...

Looking at the pics, the car still has an awful lot of interior left and they sound like they had 1 day to get their lap in.

I was expecting the car to be virtually race spec with numberplates and a Tax Disc.

Also it seems they didnt do any research, just did what they thought would be good modifications. A cold air scoop is a unusual thing to be fitting on the day. And whilst a flat bottom would make a difference, Id say its not something the average person will fit and would need to be part of an entire aero work over, not just bolt it on and hope!

Edited by rr_ww

I think the time was pretty poor, the standard car can do 8.35 to 8.40 I thought. With sticky tyres, more power, less weight it should do better. Proof that fitting some shiny parts does not equal decent car.

I was very dissapointed in the whole article, results and content, particularly after last months impressive result at Bedford.

As pooky says, all those shiney parts and they only manage to lop 10 seconds off the standard M3 time. Well lets see if they do re-appear next spring ...

Thats what I thought, they should have had carbon fibre trim like mine, it would have been worth at least 5 seconds a lap!

 

more power could be the answer all right.. would of been good if they published the power to weight ratio before and after they started modfiying it..

Bet they didn't even need to spend that 2.5k that the specialist recomended saying the car was stripped and new suspension, brakes etc were fitted.
In the article Dirk gave his recomendations about how to make the car quicker for the circuit, stuff like fitting a flat underside to the car.

He may have a point. The reason flat floors work is because the air travels much faster underneath the car and faster flowing air is at lower pressure. So the air at higher pressure on top of the car pushes it into the ground. Having not read the article he may be suggesting that if there were no air under the car, i.e. a vacuum, then this would give you the most downforce.

You also need to be careful how the flow is channelled back into the normal air flow. Venturis increase downforce and reduce drag as the air needs to turn a slight corner which speeds up the flow to lower the air pressure but also narrows the size of the car between top and bottom so you get more pressure recovery (the difference in pressure between the front and back of the car - higher pressure at the front means more drag).

an 80 kg passenerger in the seat might make about 15s
difference.

are there  online specs/pics for the M3 GT, so I can see how
they set it up?

John