[rwarden]

Originally Posted by Bleu Omdurman

Hey guys,

This post is directed at those that track their cars often and have made a couple of changes to the car, and noted the difference, if any.

As I posted in the "another physics question" thread, I am building a decision model to aid in picking the optimal modifcation set, given a certain budget. It uses Microsoft Solver. The objective function is to minimize lap time. In other words, modifications are decided upon based on their effect on laptime as a function of cost.

Three of my decision variables that effect laptime are:

1) Required lbs lost to drop 1 second of laptime.
2) Required HP gain to drop 1 second of laptime.
3) Required lbs of downforce to drop 1 second of laptime.

Clearly, what track you are minimizing laptime on, is important. That is why the three above are variables and not constants.

Here is a recommended format for your reply.

BWR S/C +53 hp, 1 second gain at Leguna Seca
CF Diffuser, -10lbs weight, +5lbs downforce, 8 tenths at Sebring

anything helps.

BTW, the numbers I am using now are 100 lbs/sec weight, 15hp/sec, 20lbs/sec downforce

One variable you've not listed is "driver experience" - perhaps intentionally, or not? If you consider youself an expert driver, and have little new to learn, great, this experiment makes sense, but if you are new to road course driving, your best bang for the buck in terms of reducing your laptime is driver training/experience.... just my $0.02...

R Warden