Speartech

iTrader: (14)

<img src="http://www.speartech.com/91Z28LS1_drag_launch01.jpg" alt=" - " />

I took the LS1 91 Z28 to Muncie Dragway last night for some baseline runs. The conversion and buildup of the car is at:
http://www.speartech.com/coproj-1991ls1.html

The weather turned decent so I thought this would be a great chance to see how everything was working. I was happy! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

Everything worked well except none of my burnouts were any good. The first run I missed getting in the water. After that I would get them wet, but as soon as I would get them spinning, the car would push forward too much. I wanted a good smokey burnout but never got one. Anyway, I was very pleased with the performance of the car.

I made 5 passes total.

#1) 12.060 115.25 1.800 60'.
#2) 12.151 115.06 1.873 60'.
#3) 11.920 115.14 1.729 60'.
#4) 11.926 115.35 1.754 60'.
#5) 11.921 115.36 1.741 60'.

I think there is certainly more to be had. I have a set of 3.73 gears to replace the 3.23's, and maybe a line-lock or something to get better control over the burnout situation. I've read that the Hoosiers like a good burnout and I could definitely feel a slip and grab with each launch. I had a Grand National about 6 years ago that ran a best of 11.84 and this car is probably going to beat that the next time out! FUN STUFF!! <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

<small>[ July 12, 2002, 10:26 AM: Message edited by: Speartech ]</small>

gator's 99TA

iTrader: (2)

nice run! what is the race weight of the car? mods?

Pro Stock John

iTrader: (34)

Nice!!!!

I bet some gear would be a good thing, what are you shifting at?

Nine Ball

iTrader: (38)

Cool! 11s on "baseline" runs is always nice <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

Tony

RyanJ

3.73's and a good burnout with a line lock will get them 60's down to easy 1.6's with that converter. good luck with the car....i used to have a 92 RS (25th anny) and would have loved to see it with an LS1/Yank combo <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Speartech

iTrader: (14)

Thanks guys. I was pretty pumped about having 11.9's as a starting point!
I have not weighed the car yet, but will shortly.
PSJ: I'm shifting at 6600 trying to get the most from the cam.
Below is a list of mods, copied and pasted from the buildup page on my website:

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

Damian

iTrader: (89)

****** SWEET!!! 91-92 Z28's are some of my favorite f-bodes, and the LS1 is my favorite engine <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> ..

My hat is off to you. Thats awesome..

Josh

JayLS1-327

iTrader: (2)

Congrats.

Nice write up too.

WJ SOM SS

iTrader: (11)

Hi John. Your car is "The *****". Looks great---nice job. WJ. <img border="0" alt="[Burnout]" title="" src="graemlins/burnout.gif" />

Kenny H

Nice! You have nearly an identical set-up to me. My car ETed a bit better because my short time was a bit better. With a 1.60 short time, we should both be in the 11.65 range I think!

NICE!

Bob Cosby

That is absolutely awesome. If it was black, I'd be asking how much you'd sell it for. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> I look forward to hearing how things progress.

Good luck!

Crazyquik

Dude, that is so badass!!!! I bet everyone was thinking "blah just another 3rd gen, probably run mid 14s"

Well, time to go look for a black with silver trim 3rd gen..... <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

J.

DóòD

Whoo Hoo!!! <img border="0" alt="[hail]" title="" src="graemlins/gr_hail.gif" /> <img border="0" alt="[hail]" title="" src="graemlins/gr_hail.gif" />

Amarillo2

I'm impressed!! Sounds like all the hard work paid off. Good luck!!

98TAauto

iTrader: (2)

i think we need to send that back in time to pick on the 5.0's <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

sweet times and car!!! Im not a huge 3rd gen fan, but now i changed my mind

Guido

Nice job.

Always nice to see a fast 3rd gen no matter what power plant is in it.

Speartech

iTrader: (14)

Thanks for the nice words guys! And to 98TAauto, I'm glad I've made a 3rd Gen fan of you. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

After looking at the times and MPH of various cars on the board, I've gotta think the 3rd Gens are quite a bit lighter than the 4th Gens. With every run being 115+ with no head work and thru cast iron exhaust manifolds, it leads me to believe it's low weight rather than high horsepower. One guy in a C5 running 12.8's couldn't believe I was running 11's with no headers.

I did get a line-lock yesterday and will try and schedule the 3.73 install next week. Then back to the track.

I will post when I get it weighed.

JimmyKash

They are SIGNIFICANTLY lighter....

my shipping weight of my 89 IROC-Z with ALL power options and T-tops was like 3350lb

so with driver and all fluids and no weight reductions you're looking around 3600lb, pretty nice if you ask me

MMI Z28

nice. surprize everyone with a 3rd gen.

ALLBORENOSTROKE

<img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" /> Nice numbers first time out.With that set up that car outta run some low 11's or even some high 10's in decent weather and with a little better gear.

<small>[ July 21, 2002, 02:47 AM: Message edited by: ALLBORENOSTROKE ]</small>