"floating" at high speed
Thread Starter
Le Mans Master
Joined: Jan 2009
Posts: 6,226
Likes: 33
From: Morton illinois
St. Jude Donor '14-'15
"floating" at high speed
Any experience this? last year my car seemed to be solid, but at 140mph today it seemed a bit light. maybe the 295's up front do it?
I run MT drag radials out back and supercars up front. Z sways and T1 shocks lowered on stock bolts
I run MT drag radials out back and supercars up front. Z sways and T1 shocks lowered on stock bolts
Le Mans Master
Joined: Nov 2003
Posts: 8,004
Likes: 250
From: Tampa Fl
St. Jude Donor '12-'13-'14
if I have my top down, and I go fast, I feel it. Floating, or light, or loose.
After the windshield, the air spools right on my trunk it feels like. Ive had mine at 143MPH on a closed course and although it felt like it was floating, it held steady
After the windshield, the air spools right on my trunk it feels like. Ive had mine at 143MPH on a closed course and although it felt like it was floating, it held steady
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
the hood can act like a parachute at higher speeds.
Going to new stick tires, an agressive alignment will help reduce that float feel
Thread Starter
Le Mans Master
Joined: Jan 2009
Posts: 6,226
Likes: 33
From: Morton illinois
St. Jude Donor '14-'15
I have a heat exractor hood, so air is vented. not sure on my alignment. My 295's would barely hit the inner fenderwell on sharp turns so I cut away a 2"x2" section so the tire wouldnt hit, Im sure that doesnt change anything.
it almost felt like the 1/4 mile with my slicks on. wide radials up front and slicks out back at 130+ feels quite uneasy
it almost felt like the 1/4 mile with my slicks on. wide radials up front and slicks out back at 130+ feels quite uneasy
Melting Slicks
Joined: Jun 2007
Posts: 2,441
Likes: 25
From: @ work in South Carolina
St. Jude Donor '08-'11-'12
My first Z went 160+ with no float, the only suspension mod was lowered on stock bolts.
Instructor
Joined: Oct 2009
Posts: 212
Likes: 0
From: North Las Vegas NV
Two different types of tires can do it for sure. I had mine do that with Nitto Z rated drag radials in back and Supercars in front. Just didn't feel planted a little nerve racking at high speed.
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Melting Slicks
Joined: Jun 2007
Posts: 2,172
Likes: 1
From: Sartell Minnesota
^ are you trying to tell us to get a A6? as for the o/p i've had mine up to 165(closed course) and it felt a little light but i didn't feel the floating feeling you speak of. I have since lost my ***** and don't see over 120 anymore 
lol i think i'm getting old...
lol i think i'm getting old...
Team Owner
Joined: Jul 2004
Posts: 24,652
Likes: 298
From: NJ
St. Jude Donor '05-'08
I have a heat exractor hood, so air is vented. not sure on my alignment. My 295's would barely hit the inner fenderwell on sharp turns so I cut away a 2"x2" section so the tire wouldnt hit, Im sure that doesnt change anything.
it almost felt like the 1/4 mile with my slicks on. wide radials up front and slicks out back at 130+ feels quite uneasy
it almost felt like the 1/4 mile with my slicks on. wide radials up front and slicks out back at 130+ feels quite uneasy
On the track I run 315 all around. I have no float issue and I have been up to 176. I do have an aggressive alignment and dual rate coilovers with penske triple shocks which also help.
Prior to that setup at around 150+ with stock shocks and a somewhat aggressive street alignment it would start to get light out back.
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
An extractor hood works too.
and I have driven an Audi A6 at speeds above 120. No fricken way will I do that again. Too many electrical nannies and <koff> safety features going off. Car just did not like slight tire slide through high speed corners.
and I have driven an Audi A6 at speeds above 120. No fricken way will I do that again. Too many electrical nannies and <koff> safety features going off. Car just did not like slight tire slide through high speed corners.
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
An extractor hood works too. Yes with a splitter and wing
and I have driven an Audi A6 at speeds above 120. No fricken way will I do that again. Too many electrical nannies and <koff> safety features going off. Car just did not like slight tire slide through high speed corners.
and I have driven an Audi A6 at speeds above 120. No fricken way will I do that again. Too many electrical nannies and <koff> safety features going off. Car just did not like slight tire slide through high speed corners.
Team Owner
Joined: Mar 2002
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Instructor
Joined: Oct 2009
Posts: 212
Likes: 0
From: North Las Vegas NV
I had mine up to 187 mph and it was smooth with Pilot Sports all the way around and stock suspension. I about crapped myself when the wiper blades flew across the windshield to the full "open" position. It happened twice and I haven't visited that speed again since. If I do, I will be removing the wiper arms first. As I stated in a previous post, it is not uncommon for a car with two different brands/types of tires to have a nervous feel even at 70 to 80 mph.
Thread Starter
Le Mans Master
Joined: Jan 2009
Posts: 6,226
Likes: 33
From: Morton illinois
St. Jude Donor '14-'15
Melting Slicks
Joined: Feb 2006
Posts: 2,163
Likes: 5
From: Houston
Thread Starter
Le Mans Master
Joined: Jan 2009
Posts: 6,226
Likes: 33
From: Morton illinois
St. Jude Donor '14-'15
Advanced
Joined: Apr 2007
Posts: 69
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From: SHREVEPORT LOUISIANA
floating at high speed
1999 c-5 hardtop s/c 550hp 6-spd:
GYrunflat tires tenacious but at 187mph car rear end extremely light on road began to sway slightly shut it down. will not stick at high speed without rear wing for downforce. managable up to 165mph. sunny day ambient temp 72 degrees that day.
new tires, supercharger new and broken in that was a one time "lets see what she can do" very dangerous wont do it again.
GYrunflat tires tenacious but at 187mph car rear end extremely light on road began to sway slightly shut it down. will not stick at high speed without rear wing for downforce. managable up to 165mph. sunny day ambient temp 72 degrees that day.
new tires, supercharger new and broken in that was a one time "lets see what she can do" very dangerous wont do it again.
