Et & trap speed
Thread Starter
Instructor
Joined: Apr 2008
Posts: 245
Likes: 2
From: melbourne florida
Et & trap speed
Here is what I have....99 FRC
Ls1 ...410 rwhp,390 rwtq, 6 speed car with 390 gears.
I am going to be running the Hoosier Quicktime 275/40 17 tires in the rear and I am expecting a decent launch with minimal wheel spin. With these numbers and a hypothetical near perfect launch,what do you guys feel this car is capable of as far as et and trap speed?? Any input would be greatly appreciated.
{Stock Clutch,2000-2500 launch}
Ls1 ...410 rwhp,390 rwtq, 6 speed car with 390 gears.
I am going to be running the Hoosier Quicktime 275/40 17 tires in the rear and I am expecting a decent launch with minimal wheel spin. With these numbers and a hypothetical near perfect launch,what do you guys feel this car is capable of as far as et and trap speed?? Any input would be greatly appreciated.
{Stock Clutch,2000-2500 launch}
Safety Car
Joined: Aug 2011
Posts: 4,447
Likes: 409
From: Portland OR
The ET will be a tough guess because it will be difficult to get a clean launch. Have you driven a stick with slicks yet?
I also don't know what 410 at the wheels would net for a mph. Sticks are always 2-3 mph higher than equivelant auto. I'll guess 117?
I am curious because I went 12.0 @ 121 with my NA auto coupe recently, first good pass, and I have no idea where I'm at power wise. It will be getting some Hoosier Drag radials for this weekend, that pass was on street rubber.
Ron
I also don't know what 410 at the wheels would net for a mph. Sticks are always 2-3 mph higher than equivelant auto. I'll guess 117?
I am curious because I went 12.0 @ 121 with my NA auto coupe recently, first good pass, and I have no idea where I'm at power wise. It will be getting some Hoosier Drag radials for this weekend, that pass was on street rubber.
Ron
Le Mans Master
Joined: May 2006
Posts: 9,993
Likes: 1,136
From: League City Tx
It should go 11.70s or so at about 119-120 depending on the DA, how good you can front half the car and how good you can shift. It really all depends on how good you can drive and keep the power up in the power band on the launch.
For reference, my 02' Z06 bone stock other then a vararam and drag radials went 12.16@117. That was a 1.80 60' and in 1500' DA. About 360rwhp we guessed. And I was by no means a good driver.
For reference, my 02' Z06 bone stock other then a vararam and drag radials went 12.16@117. That was a 1.80 60' and in 1500' DA. About 360rwhp we guessed. And I was by no means a good driver.
Le Mans Master
Joined: Nov 2003
Posts: 8,308
Likes: 157
From: NJ
Here is what I have....99 FRC
Ls1 ...410 rwhp,390 rwtq, 6 speed car with 390 gears.
I am going to be running the Hoosier Quicktime 275/40 17 tires in the rear and I am expecting a decent launch with minimal wheel spin. With these numbers and a hypothetical near perfect launch,what do you guys feel this car is capable of as far as et and trap speed?? Any input would be greatly appreciated.
{Stock Clutch,2000-2500 launch}
Ls1 ...410 rwhp,390 rwtq, 6 speed car with 390 gears.
I am going to be running the Hoosier Quicktime 275/40 17 tires in the rear and I am expecting a decent launch with minimal wheel spin. With these numbers and a hypothetical near perfect launch,what do you guys feel this car is capable of as far as et and trap speed?? Any input would be greatly appreciated.
{Stock Clutch,2000-2500 launch}
With the stock clutch, ideally, low 11's.
But you need seat time. You saying 2000rpm launch/slicks/and near perfect launch doesn't jive.
Best thing you can do is read some threads, ask questions, and start off slowly. Get someone to go to the track with you who has experience with a manual corvette(late model). It will take 100 passes before you start fing the bottom et for your setup.
I would air the tires up to over 20 psi and get a feel for the car. Theres alot to know so don't get ahead of yourself.
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Burning Brakes
Joined: Jul 2009
Posts: 976
Likes: 53
From: smyrna de
02 z With 430/400 and 3:42's i went 11.27@125 on a street tire, 1.78 60' . Da around 0 ft, 60 deg air temps. I also went 11.36 @ 125 in 1200ft da as well on the street tire.. i would expect around a 11.20. +/- @ 122 if i was driving ur setup at my local track, which is cecil county in md...
Burning Brakes
Joined: Jul 2009
Posts: 976
Likes: 53
From: smyrna de
Edit* i just saw ur on a stock clutch... stock clutch+dr's is a recipe for a broken trans... ask me cause i know from experience.. ur gonna need a 4000 rpm+ launch to get it to 60 ft well, and the stock clutch will get angry before u even go 60'..
Safety Car
Joined: Aug 2011
Posts: 4,447
Likes: 409
From: Portland OR
02 z With 430/400 and 3:42's i went 11.27@125 on a street tire, 1.78 60' . Da around 0 ft, 60 deg air temps. I also went 11.36 @ 125 in 1200ft da as well on the street tire.. i would expect around a 11.20. +/- @ 122 if i was driving ur setup at my local track, which is cecil county in md...
Ron
Drifting
Joined: Apr 2009
Posts: 1,898
Likes: 9
From: Morrisville PA
02 z With 430/400 and 3:42's i went 11.27@125 on a street tire, 1.78 60' . Da around 0 ft, 60 deg air temps. I also went 11.36 @ 125 in 1200ft da as well on the street tire.. i would expect around a 11.20. +/- @ 122 if i was driving ur setup at my local track, which is cecil county in md...
I ran 11.7 at 125 in mine on street tires with a massive bog to a 2.0 60 ft.
Race Director
Joined: Dec 2006
Posts: 12,367
Likes: 2,900
From: Fort Worth, Texas
I'm curious as well, because a stock clutch should slip if anything and not break parts. I didn't start breaking stuff till I put in an aftermarket clutch. Also wondering what street tires as that is impressive if a true street tire. I fought to get in the 11s on a 200treadwear street tire when I put on heads at ~400rwhp, I finally did an 11.99@120 on a 1.88 in the heat of summer so I was making less power and the track was stickiest. Still had to peddle first and granny shift it. I launched in 2nd for giggles and cut 2.1 60' and still ran a 12.3 lol I assume your frc is cam-only?
Burning Brakes
Joined: Jul 2009
Posts: 976
Likes: 53
From: smyrna de
My passes were on a Nitto nt-05, not the R. Well my only pass on my stock clutch and dr's the pedal stuck to the floor and i ended up damaging the 4th blocker ring and shearing the forged keys.. not really a theory just my experience. It has never stuck on a street tire, but i think the 4k rev launch on a 47k mile ls6 clutch didnt help . now i have a mantic single but no passes yet.
This is a 11.32 on a full 200 tread wear nitto nt-05, 1.77 60' this pass
http://m.youtube.com/watch?v=oQb8WTXU6XE
This is a 11.32 on a full 200 tread wear nitto nt-05, 1.77 60' this pass
http://m.youtube.com/watch?v=oQb8WTXU6XE
Dig
Joined: Jan 2006
Posts: 5,467
Likes: 1,127
From: Port Saint Lucie FLORIDA & HONDURAS
Crap... With 600rwhp NA I ran a slippery 13.00 last month. Need details on that street tire deal
But JoeG is the man for stock clutches. Holy crap... His vette makes us all look bad with his stock clutch
But JoeG is the man for stock clutches. Holy crap... His vette makes us all look bad with his stock clutch
Last edited by 123sugey; Jul 30, 2012 at 10:20 PM.
Race Director
Joined: Dec 2006
Posts: 12,367
Likes: 2,900
From: Fort Worth, Texas
My passes were on a Nitto nt-05, not the R. Well my only pass on my stock clutch and dr's the pedal stuck to the floor and i ended up damaging the 4th blocker ring and shearing the forged keys.. not really a theory just my experience. It has never stuck on a street tire, but i think the 4k rev launch on a 47k mile ls6 clutch didnt help . now i have a mantic single but no passes yet.
This is a 11.32 on a full 200 tread wear nitto nt-05, 1.77 60' this pass
http://m.youtube.com/watch?v=oQb8WTXU6XE
This is a 11.32 on a full 200 tread wear nitto nt-05, 1.77 60' this pass
http://m.youtube.com/watch?v=oQb8WTXU6XE
Here's a video of 5k rpm launch on LS6 clutch http://www.youtube.com/watch?v=93iHB...7&feature=plcp
I haven't tried the nt-05, but they appear to have a good contact patch. I assume you swap your clutch fluid at the track?
Dig
Joined: Jan 2006
Posts: 5,467
Likes: 1,127
From: Port Saint Lucie FLORIDA & HONDURAS
Nice pass, I thought you meant you broke the trans output shaft. A stickier tire definitely puts more strain on the clutch.
Here's a video of 5k rpm launch on LS6 clutch http://www.youtube.com/watch?v=93iHB...7&feature=plcp
I haven't tried the nt-05, but they appear to have a good contact patch. I assume you swap your clutch fluid at the track?
Here's a video of 5k rpm launch on LS6 clutch http://www.youtube.com/watch?v=93iHB...7&feature=plcp
I haven't tried the nt-05, but they appear to have a good contact patch. I assume you swap your clutch fluid at the track?
I'm a realist like them all.
