Reducing rear tire pressure reduces oversteer?
#16
Burning Brakes
Join Date: Nov 2003
Location: Mahopac, NY
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Originally Posted by jeeper31
My curiosity is peaked. Maybe i'll put in an automatic.
I will be doing the same. I'm also planning on getting a haircut tomorrow which I hope will reduce some of my unsprung weight. Here are my mods for this weekend and expected time reductions:
Remove cigarette lighter -.25 seconds
Haircut - -.5 seconds
Remove caps on tire valves -.25seconds
Install in-car video system for watching **** in-between runs -4 seconds
So I should be a total of 5 seconds faster as well this week. Maybe Mike can share his secret now.
#17
Burning Brakes
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I actually just recently did the same thing.
I started runing 36 psi all around - too much oversteer
I dropped the fronts 29 psi and kept the rears at 36 psi - still too much oversteer
Kept the fronts at 29 psi and dropped the rears to 34 psi - So much better
Still a little bit of oversteer...but controllable...and maybe preferable in an autocross.
I do need more rear traction though. Last weekend when I was coming out of turns into the straights, my rear tires where spinning a lot before they would hook up.
I started runing 36 psi all around - too much oversteer
I dropped the fronts 29 psi and kept the rears at 36 psi - still too much oversteer
Kept the fronts at 29 psi and dropped the rears to 34 psi - So much better
Still a little bit of oversteer...but controllable...and maybe preferable in an autocross.
I do need more rear traction though. Last weekend when I was coming out of turns into the straights, my rear tires where spinning a lot before they would hook up.
#18
Race Car
Originally Posted by arbeitm
I think he's removing his cigarette lighter.
I will be doing the same. I'm also planning on getting a haircut tomorrow which I hope will reduce some of my unsprung weight. Here are my mods for this weekend and expected time reductions:
Remove cigarette lighter -.25 seconds
Haircut - -.5 seconds
Remove caps on tire valves -.25seconds
Install in-car video system for watching **** in-between runs -4 seconds
So I should be a total of 5 seconds faster as well this week. Maybe Mike can share his secret now.
I will be doing the same. I'm also planning on getting a haircut tomorrow which I hope will reduce some of my unsprung weight. Here are my mods for this weekend and expected time reductions:
Remove cigarette lighter -.25 seconds
Haircut - -.5 seconds
Remove caps on tire valves -.25seconds
Install in-car video system for watching **** in-between runs -4 seconds
So I should be a total of 5 seconds faster as well this week. Maybe Mike can share his secret now.
Matt - got this post while i was in a public place by myself. Started laughing out loud and got a few looks from others.
Jon - Since you did have a landmark birthday it is time to put the good rubber on.
#21
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Join Date: Nov 2004
Location: Long Island , NY
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Originally Posted by arbeitm
I think he's removing his cigarette lighter.
I will be doing the same. I'm also planning on getting a haircut tomorrow which I hope will reduce some of my unsprung weight. Here are my mods for this weekend and expected time reductions:
Remove cigarette lighter -.25 seconds
Haircut - -.5 seconds
Remove caps on tire valves -.25seconds
Install in-car video system for watching **** in-between runs -4 seconds
So I should be a total of 5 seconds faster as well this week. Maybe Mike can share his secret now.
I will be doing the same. I'm also planning on getting a haircut tomorrow which I hope will reduce some of my unsprung weight. Here are my mods for this weekend and expected time reductions:
Remove cigarette lighter -.25 seconds
Haircut - -.5 seconds
Remove caps on tire valves -.25seconds
Install in-car video system for watching **** in-between runs -4 seconds
So I should be a total of 5 seconds faster as well this week. Maybe Mike can share his secret now.
I am open to any creative ideas, and like always I'll try to help anybody that needs a better setup regardless if they are competing in my class or not. I think it's a lot more fun if everyone car has the most effective setup and then is you driving that really makes a differnce.
#22
Race Car
Originally Posted by Energy9
Since everyone is so curios about how I can improve my times so much the pic below is self explanatory
#28
Instructor
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Join Date: Jan 2005
Location: Ottaweenieville, Canada
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No probs, it's okay. The concept of having other Porsches to run against is something I'll read about anytime!
I've only ever run with other Porsches at the Parade last year - this weekend is the Canadian National Championships in Toronto, and I'm the only Porsche entered! (In class, I'm going to get steamrollered by Z06's, but what can ya do ... )
I've only ever run with other Porsches at the Parade last year - this weekend is the Canadian National Championships in Toronto, and I'm the only Porsche entered! (In class, I'm going to get steamrollered by Z06's, but what can ya do ... )
#29
Instructor
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Join Date: Jan 2005
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Anyhow, to kill the thread, changing the rear anti-roll bar from 20mm (factory optional) to 16mm (stock) did the trick nicely (front bar is 30mm). Still got steamrollered by the Z06, of course.