Speartech

iTrader: (14)

<img src="http://www.speartech.com/91Z28LS1_drag_launch8_28_02.jpg" alt=" - " />

I took the 91 Z28 back to Muncie Dragway on Wed. night to see how it would do with 3.73 gears instead of 2.73's that were in it. Actually it wasn't a whole lot quicker, but the temp and humidity were higher also. I made four passes.

#1) 11.93 @ 114.38 1.682 60'
#2) 11.86 @ 114.57 1.641 60'
#3) 11.88 @ 114.27 1.635 60'
#4) 11.91 @ 114.28 1.668 60'

All in all I'm quite pleased, but I thought I'd maybe see some quicker times going from 2.73 to 3.73. Last time out with the 2.73's the car went 11.92 (three in a row!) all at 115+ mph, but like I say, it was cooler out then.
I think when the cool weather arrives it may go 11.7x @ 116. Just a guess. There is still plenty of little things to do to the car, also!

Patman

Very nice! Like you said, the weather was better when you ran with your 2.73s, so I bet in the end you'll see possibly 2-3 tenths improvement from that 2.73 to 3.73 swap. What converter are you running?

Speartech

iTrader: (14)

Oops, good point. I forgot to include the list of what makes it go.

Thanks.

1991 Z28 Camaro
2001 LS1 engine w/4L60E transmission
Speartech Fuel Injection Systems custom plug-n-play wiring harness for 3rd Gen F-body
Speartech Fuel Injection Systems performance PCM programming
LS6 intake manifold (std. w/2001 and up LS1 engine)
Comp Cams cam .566-.566 lift; 222/222 duration @.050; 114LSA
Comp Cams 918 valve springs
Comp Cams titanium retainers
ASP underdrive crank pulley
Aeromotive EFI adjustable fuel pressure regulator
MAC off road Y-pipe custom fit to car
Flow Tech 3" exhaust cutout
Yank Thruster Pro 4400 torque converter
HD transmission cooler
2000 T/A aluminum driveshaft
Jegster driveshaft loop
LG Motorsports tubular lower control arms
BMR control arm relocation brackets
Right rear spring airbag
Weld Draglite 15x3.5 front wheels with Kumho 165R15 tires
Weld Draglite 15x8 rear wheels with Hoosier Quick Time Pro 27x10.5x15 D.O.T. drag tires