"High g" turns and 38/38 "turbo" lag - a

[Guest Anonymous]

I was wondering why my car wouldn't go anywhere if I punched it in the middle of the turn at Sears Point, thought was fuel starvation because of the "high g's", found the answer in a book: basic physics! the entire tire patch was being used to keep the car on the turn, tires couldn't push the car forward and thus the lag until coming out the turn.

It felt good, but it was totally wrong!

[Guest Anonymous]

URL: http://www.bmw2002faq.com/store/index.html

break the rear end loose, no? unless theres no power there due to fuel starvation or whatever? try upping the fuel pressure a half pound and see if that changes anything. does it *lose* any power in sustained hi-g turns or does it just seem to not have what it has on the straights?

-Rob

[Guest Anonymous]

I think the power and the fuel was there, but not the

traction, it was being all used up for the turn, unlike

regular road driving one will never approach that

as there is no room for error, so there is always

some traction left for acceleration. The opposite is

true: you can't break and turn 100% you have to

give one or the other.

I don't think it was fuel starvation as entering the

turn gas was being pumped and not used and

eventhough the fuel in the float reservoir might

have tilted it would remain the same level in the

center were the jets are, no? I am not sure...

[Guest Anonymous]

when you attempt to add power at mid- corner-

do the revs go up?

If yes, you're out of traction, and the inside rear is spinning.

If not, then you have a carb problem. My 38/38 doesn't seem to have a high- speed cornering fuel starvation problem, but it does run out of poop at 6500 rpm. A cheap air/fuel meter will help diagnose this.

Rob, the rear end's behavior really depends on how your car isset up. The stock setup will lift the inside rear on long, hard sweepers, so it has no traction to contribute, either for cornering or acceleration. With some work, springs, and better- balanced sway bars, the inside rear can be made to stick.

Most cars don't have the power to break the rear loose on a fast sweeper. The 'natural' tendancy of an '02 is to plow (front end runs wide) when you add throttle. Unless it's raining- and then it's time to go play!

Many of us (Jeff Ireland included) use the 'dreaded trailing throttle oversteer' to get the cars to rotate.

So in a typical sweeper, I'll enter at steady state, get the car to follow the outside arc of the sweeper, then lift just a bit. The rear of the car comes out, the nose points down toward the apex, and at that point, I'm full on the gas to hold the drift and accelerate down to the apex and out to track out. If I've found the apex and the speeds right, the car will touch the apex, and then we go out to track- out- adn I don't get any other options, as we're at 'maximum attack' as Tommi says...

Hope this helps, db...

t

[Guest Anonymous]

There was too much going on for me to look at the

tach, but I didn't hear high rpm's, perhaps the gear

was not right for the turn either (third), there is a lot

to learn...and it is not intuitive either!

I"ll use this tip on the next driving school hopefully I

get someone experienced with the 2002's

dynamics as an instructor.