HansB

A friend of mine did some aerodynamic modeling on the 944. As a result he gave up on improving his 944 Turbo, he concluded this could not be made into a proper race car. But before he did this he established the optimal car height of 9 cm = 3.5", which is what I used.

I have to do some coast-down testing, but every time I get to the circuit, I just want to drive, and forget about it. Haven't done any coast-down tests of the before situation.

HansB

Yes, that is for the current power to weight ratio. I took published lap times on a large number (>50) cars with a known power to weight ratio. As you would expect, you get a non-linear relation, but surprisingly with a reasonable correlation.

Luis de Prat

Thanks for the informative post. I had always wondered about the effect of the WB option on these cars.

Coincidentally, most people forget the 924/944 was largely designed by a Dutchman - Harm Lagaay.

anders44

good work hans! not sure everybody understands how fast this car really is, but it will beat any stock 996/997 non cup car with these times.

Duke

Very professional post Hans. Would be interesting to see pics of the suspension

333pg333

+1000 Congrats Hans. Posts like these are too far and few between.
I spoke to you about your widebody sometime ago and you said that you or your body guy was working on some kits. Did this ever eventuate?
Also I have made contact with Richard Buitendijk about his red car in this clip. http://www.youtube.com/watch?v=vExPd7IlCbc Do you know him? He says he saw you or met you recently.
Have you heard of his suspension. http://www.intraxracing.nl/
The 4 way system sounds pretty trick.

jerome951

Very nice post, Hans.

I think you will also find additional benefit in the cooler tire temps in longer races and not having to save the tires when pushing hard.

By chance, did you measure the increase in braking performance from the wider tires?

Also, thanks for reinforcing my need for a datalogger... ;-)

HansB

Thx Anders.
..and some. Last year I competed in a race on S/F with 996 GT3 RS an GT3 Cup cars in it, they had lap times of 2:38 - 2:49. In fact I beat one.

2:43 would put me in the middle of that pack.

But then there are 996 GT3RSR, 997 GT3 RS, 997 GT3RSR, Turbo'd 996, in the end you'll never win.

special tool

Hans, neither of the sites in your signature will load for me.
I was curious about the engine spec.

HansB

Thx Patrick.

Yes, they are ready and available. In fact, may car is there now for a new bumper shell and splitter. On a widebody kit the standard stuff is not a great fit.

Off course I know Richard. He and his father have an excellent machine shop, and produce some of our parts. I have always beaten him on the track, but having said that, he holds the fastest lap time at Zandvoort with a 430 HP engine, that alas blew up after two hours. I have heard that he is working on a dry sump setup.
Yes, I have a 2-way adjustable Intrax suspension on my car. It was one of the first with an Intrax suspension. 4 way is too much for me. already need professional help to get my 2-way set up properly.

thingo

How much of the improvement would you attribute to the wider tyres, and I gather that would be the wider front that gives the improvement(considering balance F/R)

HansB

Do not know, I think the wider tires actually do not contribute that much yet. I would expect most gain from them in durability once I start really pushing the car

HansB

Sometimes the pictures in this post are not visible. Guess my provider has some difficulty adapting to the new year. Pls try again later.

daigo

Hans,
Fantastic information! I too would love to see more of the suspension.
Beautiful splitter/undertray. Are these going to be available?
Also, when you measure ride hieght at 9cm, where is this measurement taken, and do you run any rake?

Cheers and great work.

Depape

Great informative post!
Thanks