1.8 60 footer really isn't too bad for a RWD car on street tires. I'm kind of surprised by your trap speed though. At that kind of power levels you should trap well over 120 mph.Well finally got everything figured out. The car put down 530hp 503tq at 19psi on e85. We ended up running out of fuel with the injectors I had (precision 1000cc). I thought it would of been enough but I think since it was converted over to sequential injection it played a role. Took it to the track and on sumitomo 275/40/17 htrz-III I ran a 12.5 at 115mph with 1.8 60ft with a built r-154. No launch control, two step just rev and go. Thinking about throwing some mickey thompson drag radials on this baby and running it at the street life tour (king of the streets) at kilkare speedway in Xenia, Ohio next weekend. I think with a little more practice, drag radials, and a few more tweaks I can make it into the 11's easy. The crazy thing is that this car is hooking with just street tires. Stomp it at 20mph in first gear and no spinning. Go through the gears with the pedal to the floor you might get a little chirp.
115 mph is an 11 second trap if you get out in a 1.7 60 footer and gear change like a pissed off teenager.
My car(400 wheelish) doesn't put down tire either unless I clutch kick instigate it. I'm assuming your car most likely has a LSD rear end in working condition and with the size of that turbo(regardless of the quick spool valve), weight transfer/load has enough time to provide ample traction.