Drag Racing Results - Do these numbers seem right?

99 z28. Auto,2.73s. Only mods are slp lid, dumped spiralflow off the stock y pipe. CCWs with nitto 555r launching at idle.


13.6 at 104 with a 2.17 60 foot

Seems right.

spot on.

With a 4000 stall Ptc what kind of improvements would I be looking at?

if you're trapping 104 now, i'd expect to see a 105+ out of an aftermarket converter...coupled with your gear and a 4k stall...maybe a 12.6x at best given that mph. you'd need a tune to take full advantage of a stall that big.

my stock 273 full weight car with a only a lid, 4k stall and 273s went 8.1 @ 81 with 1.70 60'. i added 373s, full exhaust, an ls6 intake and tune and ultimately went 7.6x @ 88. VERY low 12s in the 1/4. like i was a haircut away from an 11 sec pass in da above 2500'.

My 02 Z28 with 273s Lid/Catback/Free mods/K&N went 13.2s@106mph I had a 2.03 60ft..