WSIR help
Thread Starter
Melting Slicks
Joined: Dec 2004
Posts: 3,382
Likes: 250
WSIR help
I'm not fast but run WSIR often. I'm starting to run the vette more. Guys runnning vettes at WSIR may have some ideas for me. I have a vette problem on the turn 8/9 complex and want to see what you guys think about my problem. At this time my C5Z06 is totally stock on stock tires. When I approach the braking zone to 9 I am maybe about 115-120mph, brake, heal/toe blip to 4th. In the Z I get a nasty rear lock and rear end jumps like I am not properly rpm matching. Its like the rpms drop so fast that even with a huge deliberate blip I can't get rid of the lock. This causes the car to get very unsettled and I need to pause before I can get back on the gas. This also makes me not to go any faster for fear of joining the "turn 9 rock and garden club". I don't have this problem in any other car. Any ideas to what I may be doing wrong or is that some kind of vette quirk related to the corvette hop or ?????
I also have a situation "again" in the rear where I can feel the ABS coming on braking at the base of the hill coming off the omega before turning up back hill. This causes a prolonged braking time or forced early braking due to traction loss and I waste lots of time here too. Again this is my C5Z specific problem. Are these problems related?
Thanks!
I also have a situation "again" in the rear where I can feel the ABS coming on braking at the base of the hill coming off the omega before turning up back hill. This causes a prolonged braking time or forced early braking due to traction loss and I waste lots of time here too. Again this is my C5Z specific problem. Are these problems related?
Thanks!
Melting Slicks
Joined: May 2003
Posts: 3,241
Likes: 1
From: Torrance Ca.
In a C5 At WSIR you only have to shift twice; 4-3 downshift coming into T3, and then a 3-4 upshift as you go up the hill towards T6. For the rest of the lap you can stay in 4th. That's the way I run it (I run consistant 34's with no traffic, 33 if I get a good run off T9)
Edit: this assumes you have stock 3.42 R/E gear
Edit: this assumes you have stock 3.42 R/E gear
Last edited by joemoia; Mar 20, 2008 at 03:53 PM.
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
I'm not fast but run WSIR often. I'm starting to run the vette more. Guys runnning vettes at WSIR may have some ideas for me. I have a vette problem on the turn 8/9 complex and want to see what you guys think about my problem. At this time my C5Z06 is totally stock on stock tires. When I approach the braking zone to 9 I am maybe about 115-120mph, brake, heal/toe blip to 4th.
at 115-120 mph you should be in 4th gear with a 3:42 rear
Le Mans Master
Joined: Oct 2004
Posts: 5,323
Likes: 358
From: California
In a C5 At WSIR you only have to shift twice; 4-3 downshift coming into T3, and then a 3-4 upshift as you go up the hill towards T6. For the rest of the lap you can stay in 4th. That's the way I run it (I run consistant 34's with no traffic, 33 if I get a good run off T9)
Edit: this assumes you have stock 3.42 R/E gear
Edit: this assumes you have stock 3.42 R/E gear
I am not sure what to say about your turn nine issue. I have never experienced anything like that on any track.
Braking down into five is tricky. I find that I have to be careful not to induce a power-on oversteer jumping from some downhill trail braking into feeding power. The ABS does not seem to be an issue there for me, just the weight transfer and throttle control....
