Reducing rear tire pressure reduces oversteer?
Burning Brakes
Joined: Nov 2003
Posts: 966
Likes: 0
From: Mahopac, NY
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.
Burning Brakes
Joined: Nov 2003
Posts: 966
Likes: 0
From: Mahopac, NY
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.
Race Car
Joined: Oct 2003
Posts: 3,907
Likes: 1
From: Long Island, NY
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.
Advanced
Joined: Nov 2004
Posts: 87
Likes: 0
From: Long Island , NY
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.
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
Porsche's Top 5 Most Questionable Naming Decisions
Verdad Gallardo
Pogea Racing's 964 Porsche 911 Reimagination Stands Out in a Crowded Field
Verdad Gallardo
6 Convertible Top MYTHS Most People Don't Understand!
Michael S. Palmer
2026 Porsche 911 Club Coupe is Spectacular, And Everything Wrong with the Porsche Market
Joe Kucinski
Talos Takes Your 991 Porsche 911 GT3 to the Next Level for a Cool $1.13 Million
Verdad Gallardo
9 Vehicles Porsche Helped Engineer that Aren't Porsches
Verdad Gallardo
9 Features and Characteristics That Only Porsche People Understand
Verdad Gallardo
I've Written 500 Rennlist Articles: Here's How Porsche Has Changed Along the Way
Joe Kucinski
10 Most Unnecessary Porsches Ever Built (And Why We Love Them)
Verdad Gallardo
Thread Starter
Instructor
Joined: Jan 2005
Posts: 238
Likes: 0
From: Ottaweenieville, Canada
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 ...
)
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 ...
)
Thread Starter
Instructor
Joined: Jan 2005
Posts: 238
Likes: 0
From: Ottaweenieville, Canada
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.
