Trackday pics
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From: Norcal
www.unlimitedlaps.com
No need for membership
I also run with
www.speedventures.net
www.greenflagracing.com
www.ncracing.org
No need for membership
I also run with
www.speedventures.net
www.greenflagracing.com
www.ncracing.org
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Joined: Sep 2001
Posts: 6,131
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From: IN
Originally posted by howard coleman
that is one of the reasons that if properly set up nothing can touch the fd on a road course.
that is one of the reasons that if properly set up nothing can touch the fd on a road course.
Fong, steering with the rear end is good. Snap oversteer is not. Might have to look into swapping the rear 9.5 wides to 10.5 wides with 295/30-18 Michelin Pilot Sport Cup Comps?
Keep it all straight and smooth, Cossie
Last edited by SleepR1; Mar 27, 2004 at 10:15 PM.
Thread Starter
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From: Norcal
Originally posted by SleepR1
Damn straight, howard
Fong, steering with the rear end is good. Snap oversteer is not. Might have to look into that?
Keep it all straight and smooth, Cossie
Damn straight, howard
Fong, steering with the rear end is good. Snap oversteer is not. Might have to look into that?
Keep it all straight and smooth, Cossie
All the FD love in here...haha...I cant bear to sell it...
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From: Campbell, CA
I recognize those BMWs..
Where you able to keep up with them?
Its been my understanding that lifting an inside wheel indicates that car has too much front roll-stiffness brought on by an oversized anti-roll bar..
Where you able to keep up with them?
Its been my understanding that lifting an inside wheel indicates that car has too much front roll-stiffness brought on by an oversized anti-roll bar..
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From: Norcal
Originally posted by Halz
I recognize those BMWs..
Where you able to keep up with them?
Its been my understanding that lifting an inside wheel indicates that car has too much front roll-stiffness brought on by an oversized anti-roll bar..
I recognize those BMWs..
Where you able to keep up with them?
Its been my understanding that lifting an inside wheel indicates that car has too much front roll-stiffness brought on by an oversized anti-roll bar..
I didnt have a chance to run with them
What kind of laptimes do they run?
I was having a good time playing with another E43M3,
we played cat and mouse for a good session....
Eats, Sleeps, Dreams Rotary
Joined: Apr 2001
Posts: 3,736
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From: Dallas, Texas
Cossie,
I just noticed something about your 99 spec rear wing. Do you think increasing the "angle of attack" would help with the rear traction? It looks in the pic that you have the wing fairly horizontal.
I just noticed something about your 99 spec rear wing. Do you think increasing the "angle of attack" would help with the rear traction? It looks in the pic that you have the wing fairly horizontal.
PV = nRT
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From: New Zealand (was California)
Cossie, this has some fairly basic info that could be useful:
http://www.sficc.net/tech/handling.php
http://www.sficc.net/tech/handling.php
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From: Norcal
Originally posted by clayne
Cossie, this has some fairly basic info that could be useful:
http://www.sficc.net/tech/handling.php
Cossie, this has some fairly basic info that could be useful:
http://www.sficc.net/tech/handling.php
Joined: Oct 2001
Posts: 6,279
Likes: 728
From: Florence, Alabama
thanks for your response as to your spring rate...
you posted them as 12/14 kg/mm. generally the first number is the front spring and the second is the rear. if you are by chance running 12 in the front and 14 in the rear then you should get an award for keeping the car on the track.
front spring rate on an fd should be about 57% of the total springs, so you never run stiffer in the rear.
secondly, your rate is really high making it extremely difficult to drive at the limit. the car will be snappy giving almost no warning as to breakaway. a nice spring rate for a track/street fd would be approx 550 front and 425 rear. you are miles from that. softer is often faster on a road race course. (it sure is easier to drive)
tire pressure: run approx 29 front and 27 cold at the track. keep bleeding it down after each session. a pound or so more for street.
one of the nicest racing stories happened last year... i was having dinner at the Ferrari Club of America's track weekend at Brainerd Int'l Raceway and sitting across the table from someone who told me he had just bought a new Ferrari and was looking forward to tracking it. the next day he happened to be pitted next to me and was muttering to himself as the morning wore on... i finally asked him what's up and he said the car was all over the place and undriveable. i asked him what tire pressure he was running and he said the dealer said he should run about 40 psi. i bled his tires down to 29-27 and told him to drive. the smile on his face made my year.
a final comment about lifting a rear wheel... (BMW) you lift an inside front wheel in a corner when you are running too soft rear springs.
howard coleman
you posted them as 12/14 kg/mm. generally the first number is the front spring and the second is the rear. if you are by chance running 12 in the front and 14 in the rear then you should get an award for keeping the car on the track.
front spring rate on an fd should be about 57% of the total springs, so you never run stiffer in the rear.
secondly, your rate is really high making it extremely difficult to drive at the limit. the car will be snappy giving almost no warning as to breakaway. a nice spring rate for a track/street fd would be approx 550 front and 425 rear. you are miles from that. softer is often faster on a road race course. (it sure is easier to drive)
tire pressure: run approx 29 front and 27 cold at the track. keep bleeding it down after each session. a pound or so more for street.
one of the nicest racing stories happened last year... i was having dinner at the Ferrari Club of America's track weekend at Brainerd Int'l Raceway and sitting across the table from someone who told me he had just bought a new Ferrari and was looking forward to tracking it. the next day he happened to be pitted next to me and was muttering to himself as the morning wore on... i finally asked him what's up and he said the car was all over the place and undriveable. i asked him what tire pressure he was running and he said the dealer said he should run about 40 psi. i bled his tires down to 29-27 and told him to drive. the smile on his face made my year.
a final comment about lifting a rear wheel... (BMW) you lift an inside front wheel in a corner when you are running too soft rear springs.
howard coleman
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From: Norcal
Originally posted by howard coleman
thanks for your response as to your spring rate...
you posted them as 12/14 kg/mm. generally the first number is the front spring and the second is the rear. if you are by chance running 12 in the front and 14 in the rear then you should get an award for keeping the car on the track.
front spring rate on an fd should be about 57% of the total springs, so you never run stiffer in the rear.
secondly, your rate is really high making it extremely difficult to drive at the limit. the car will be snappy giving almost no warning as to breakaway. a nice spring rate for a track/street fd would be approx 550 front and 425 rear. you are miles from that. softer is often faster on a road race course. (it sure is easier to drive)
tire pressure: run approx 29 front and 27 cold at the track. keep bleeding it down after each session. a pound or so more for street.
one of the nicest racing stories happened last year... i was having dinner at the Ferrari Club of America's track weekend at Brainerd Int'l Raceway and sitting across the table from someone who told me he had just bought a new Ferrari and was looking forward to tracking it. the next day he happened to be pitted next to me and was muttering to himself as the morning wore on... i finally asked him what's up and he said the car was all over the place and undriveable. i asked him what tire pressure he was running and he said the dealer said he should run about 40 psi. i bled his tires down to 29-27 and told him to drive. the smile on his face made my year.
a final comment about lifting a rear wheel... (BMW) you lift an inside front wheel in a corner when you are running too soft rear springs.
howard coleman
thanks for your response as to your spring rate...
you posted them as 12/14 kg/mm. generally the first number is the front spring and the second is the rear. if you are by chance running 12 in the front and 14 in the rear then you should get an award for keeping the car on the track.
front spring rate on an fd should be about 57% of the total springs, so you never run stiffer in the rear.
secondly, your rate is really high making it extremely difficult to drive at the limit. the car will be snappy giving almost no warning as to breakaway. a nice spring rate for a track/street fd would be approx 550 front and 425 rear. you are miles from that. softer is often faster on a road race course. (it sure is easier to drive)
tire pressure: run approx 29 front and 27 cold at the track. keep bleeding it down after each session. a pound or so more for street.
one of the nicest racing stories happened last year... i was having dinner at the Ferrari Club of America's track weekend at Brainerd Int'l Raceway and sitting across the table from someone who told me he had just bought a new Ferrari and was looking forward to tracking it. the next day he happened to be pitted next to me and was muttering to himself as the morning wore on... i finally asked him what's up and he said the car was all over the place and undriveable. i asked him what tire pressure he was running and he said the dealer said he should run about 40 psi. i bled his tires down to 29-27 and told him to drive. the smile on his face made my year.
a final comment about lifting a rear wheel... (BMW) you lift an inside front wheel in a corner when you are running too soft rear springs.
howard coleman
with regards to the tire pressure..I dont know if you are aware of this but I blew up some R compounds last year running 29 cold (34/36 hot) on my 3700lbs GTR at Sepang F1. They were brand new Dunlop RSVs that were DOM 2001, the Dunlop rep says it was ok to use them. I had run them a full day before, and it blew up in the mornin on the second day.
Track temps were probarlin the 90s-100sF
Dunlop Japan inspected the tire and claims that I was running tire pressures taht were too low...but over here, I have had excellent times with the kind of temps that I was previously running..like u said 27-29 cold...
Any comments?
