TexasBlownV8
Formerly TexasBlownV6
It's been slow in coming, but finally made it out to a 1/4 mile track with the twin turbos. I wanted to get some good solid test-n-tune runs in, figure things out and and dial in a few things, before cranking up the boost.
Boost controller was set to 13.5 psi as a starting point (lowest with the wastegate springs in there now).
Got a few good runs in, with decent traction. Consistently ran low-11's with a trap speed of 128 mph, with an ultra-slow 2.0 second 60'. I know I've got to work on launching with the 4r70 automatic better, but wasn't worried about that.
Car ran really good, no mechanical issues. Once the turbos kick in, car pulls great, nice steady power, and straight down the track!
Tires were an issue, as I figured they might be. I used my street Nitto Nt05's, which I know I need to replace, but haven't done so yet. I'd get out off the line, and the turbos would spool up off the line and kick in, and sometimes I'd get wheel spin in 1st. This is the area that I think needs the biggest improvement: getting the car into boost, and making it stick in 1st gear when it does. Tires and shock settings should help a lot; there's only so much I can do off the line without a transbrake, and I don't really want to change the converter, yet. I do need to leave the line harder, in as much as I can with the setup.
On the top end, I also learned I need better brakes! Stock GT brakes slow me down, but not fast enough.
Trapping was at around 6500 rpms in 3rd gear, with 373's and 27" tall tires. With either 26" tall tires, or a little spin early in the run, it'd be really close to running out of gear before the end.
And just to clarify, the car is not intended to be a track-only car, but rather used both on street and at the track. ..now that I said this, I just remembered: I have the front sway bar in place, too; forgot about that.
Boost controller was set to 13.5 psi as a starting point (lowest with the wastegate springs in there now).
Got a few good runs in, with decent traction. Consistently ran low-11's with a trap speed of 128 mph, with an ultra-slow 2.0 second 60'. I know I've got to work on launching with the 4r70 automatic better, but wasn't worried about that.
Car ran really good, no mechanical issues. Once the turbos kick in, car pulls great, nice steady power, and straight down the track!
Tires were an issue, as I figured they might be. I used my street Nitto Nt05's, which I know I need to replace, but haven't done so yet. I'd get out off the line, and the turbos would spool up off the line and kick in, and sometimes I'd get wheel spin in 1st. This is the area that I think needs the biggest improvement: getting the car into boost, and making it stick in 1st gear when it does. Tires and shock settings should help a lot; there's only so much I can do off the line without a transbrake, and I don't really want to change the converter, yet. I do need to leave the line harder, in as much as I can with the setup.
On the top end, I also learned I need better brakes! Stock GT brakes slow me down, but not fast enough.
Trapping was at around 6500 rpms in 3rd gear, with 373's and 27" tall tires. With either 26" tall tires, or a little spin early in the run, it'd be really close to running out of gear before the end.
And just to clarify, the car is not intended to be a track-only car, but rather used both on street and at the track. ..now that I said this, I just remembered: I have the front sway bar in place, too; forgot about that.
