S/C FRC falling on face after launch
10-05-2006, 08:32 AM
#1
S/C FRC falling on face after launch Ok I have a 99 Corvette with a forged LS6, Stage 5 heads, and a Vortech supercharger. I am wondering what in my tune can be causing the following...
To get a good launch I have to leave the line at 6k and up. It will launch hard then fall flat on its face and jump back up. This is killing my e.t.! Has anyone had this problem before? If I leave the line under 6k the car falls on its face all together.
To get a good launch I have to leave the line at 6k and up. It will launch hard then fall flat on its face and jump back up. This is killing my e.t.! Has anyone had this problem before? If I leave the line under 6k the car falls on its face all together.
10-05-2006, 09:18 AM
#4
Moderator
iTrader: (11)
Join Date: Mar 2002
Location: East Central Florida
Posts: 12,604
Likes: 0
Received 6 Likes
on
6 Posts
I wouldn't be so sure about TM being disabled.
The electric throttle is all tied up with some
of the torque management (desired torque is
meddling with throttle position against RPM
and so on). I don't have a '99 bin to look at but
on later trucks have seen a lot of icky traction
control, desired torque stuff.
Really you want to get at it by logging, see the
real throttle blade position vs pedal position, the
real spark vs what you see in the main table,
any likely detractors (retard terms) and when you
see who's falling back from ideal, chase down the
"why".
The electric throttle is all tied up with some
of the torque management (desired torque is
meddling with throttle position against RPM
and so on). I don't have a '99 bin to look at but
on later trucks have seen a lot of icky traction
control, desired torque stuff.
Really you want to get at it by logging, see the
real throttle blade position vs pedal position, the
real spark vs what you see in the main table,
any likely detractors (retard terms) and when you
see who's falling back from ideal, chase down the
"why".
10-07-2006, 06:53 PM
#7
On The Tree
Join Date: Dec 2005
Location: Cooper City, FL
Posts: 160
Likes: 0
Received 0 Likes
on
0 Posts
Have you considered issues besides the tune? Is the car making boost on launch? Is the belt slipping on launch, theres alot of shock on the belt when you dump the clutch at 6k. I'd also be curious about the gear ratio you're running, as SSwanner asked. Good luck.