Follow up post....went to drag strip for first time...

[96z]

Went to the strip for the first time this year....
First off the race weight 3535 without driver...a little heavy?
Temp 60*
Nittos 26 PSI

First run:
R/T .554
60 2.37
330 6.638
1/8 9.695
MPH 91.99
1000 12.279
1/4 14.44
MPH 104.93

I went sideways on this run after smoking the tires on the launch and almost ran into the barrier, also let off before the beam.

Second run

R/T .552
60 2.155
330 5.692
1/8 8.555
MPH 85.4
1000 11.054
1/4 13.16
MPH 107.36

Launched better but weakly this time

Third run

R/T .859
60 1.923
330 5.404
1/8 8.245
MPH 86.02
1000 10.726
1/4 12.81
MPH 107.97

Got more of a feel for launching this run and finally broke 12's

Last run

R/T .782
60 1.854
330 5.320
1/8 8.161
MPH 86.05
1000 10.645
1/4 12.74
MPH 107.86

My best run and best 60 foot before they kicked us out !!! I launched really good and felt the Nitto's struggling to grab.

I got a couple questions?
Why is my trap speed so low when I dyno ~350 rwhp? Shouldnt it be 110-111mph?

I burnt up the Nittos for 3-4 seconds but got absolutely no smoke. Is this normal?

All this with an SES and a probable bad O2 or TPS. Could I possibly go 12.4-12.5 with a little more weight reduction and 1.7X 60'?

Time to change sig.




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96 black Z28 A4
GTP stage II heads, GTP 226/230 cam, 11:1 CR, Pro Torque 2800 TC, Tranny cooler, 3.42, 1.6 rr, Holley 58mm TB, Hooker LT's, SLP CAI, cutout, Flowmaster, Wolfe cage, Carrera's, 5 point belts, walbro
Mattucci Motorsports WNYFA FLFB
Pics Anybody else need earplugs when they drive????

[DarkHorse]

Nice runs man!

I GOTTA know how you made the shifter? Got info? Thanks

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94 Z28 A4 GU5
Currently in the shop
TransGo Shift Kit

[Fred94LT1]

Well, as long as you want honest opinions? I'd say with those heads, that size converter, that cam and long tubes, with bad air you should trap 110. I'm not sure of the track elevation?? I'd take a close look at the shift points. I'd think you would want to shift that 3.42 geared car at 6300 rpm's. I shift mine at 6200, but I have a H/C and 3.73 gears, on stock heads. (Heads getting done as we speak) 12.7 isn't bad though, I'm more concerned with the MPH. I hope I didn't offend you, just telling you what I'm thinking.
Fred

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1994 Z28, A4,
BEST 1/4 12.413@109.55
BEST 1/4 MPH 110.49
BEST 60' 1.668
BEST 1/8 7.884@86.35
BEST 1/8 mph 86.77
Race Weight 3600lbs
DYNO: 324 RWHP,310 RWTQ

[CANTONRACER]

You should be getting 110 MPH out of that combo. Have you scanned your run? Maybe your getting some knock retard now that your under a load. Maybe you got a bad batch of gas. Anything else change since your dyno?

------------------
1996 Z28 Camaro
2001 best 1/4 BFG DR's NA - 11.865@113.57 w/1.634 60', 1/8 - 7.563@89.82mph Best 1/4 MPH 114.82 - Best 1/8 MPH 90.73 - 2002 Mid 11's NA, Mid 10's n2o

1989 GMC 1500 truck for work 18.1@73 305
8 cats to feed clean after 1999 V6 Mustang 5 speed
15.358@89.47 MPH w/ 2.227 60'
15.364@90.92 MPH w/ 2.383 60'

[96z]

No offense Fred I completely get ya. I just gotta learn how to launch, I need more practice. I was really disapointed I only trapped 108 though. I dont know why as of yet. Its going back on the dyno to get more tuning in a couple weeks. My car has been running a little "off" for the past couple months, idles weird, SES, etc. Well see when I bring it back in. Just as a comparison a A4 2002 SS with a couple bolt ons and nittos was running 13.6's at 104.

Canton- nothing changed as of yet. Im maybe getting some knock in the upper RPM's because of how loud the cutout is. The car was tuned with the cutout closed..??

I forgot to add in the first post in the upper RPM's the car seems like its pulling half ass, hard to explain but it feels like it gets heavier. Ill scan the runs next time.

Going to find out track elevation too...

[96z]

How is the 1/8 time and mph? Also just found out the SES is a bad O2.

[This message has been edited by 96z (edited July 25, 2002).]

[CANTONRACER]

The O2's do nothing WOT, just part throttle.

------------------
1996 Z28 Camaro
2001 best 1/4 BFG DR's NA - 11.865@113.57 w/1.634 60', 1/8 - 7.563@89.82mph Best 1/4 MPH 114.82 - Best 1/8 MPH 90.73 - 2002 Mid 11's NA, Mid 10's n2o

1989 GMC 1500 truck for work 18.1@73 305
8 cats to feed clean after 1999 V6 Mustang 5 speed
15.358@89.47 MPH w/ 2.227 60'
15.364@90.92 MPH w/ 2.383 60'

[96z]

<font face="Verdana, Arial" size="2">Originally posted by DarkHorse:
Nice runs man!

I GOTTA know how you made the shifter? Got info? Thanks

</font>

I got the kit from here http://dmhshiftadapter.homestead.com/SHIFTADAPT.html

Dave Hacker is a board member.

[Charged]

Try to run it with the cutout on and see what you come up with .

------------------
Joe 94 Z28 A4 LT4 D-1sc

[StreetStang37]

Your 1/8th mile time/mph match up right where they should be with your 1/4mi times/mph's so if you are down on power it's throughout the rpm's. Could be just the weathter/atltitude alone make the difference of where others say it should be.

------------------
1993 Grabber Blue Mustang GT
Trick Flow Heads, Street Heat intake, 3/8in spacer, E303, TFS 1.7rr & 6.75 pushrods, Holley 190lph fuel pump, 24# injectors & sample tube, SVO timing chain, Aeromotive AFPR, 180* t-stat, 2 5/8 Auto Meter mech fuel pressure gauge, K&N, March Ram Air & Pullies, 73mm C&L MAF, Edelbrock 65mm TB & EGR, 1 5/8in Equal Length Super Competition Hooker Headers, 2 1/2in H-Pipe w/hi-flow cats & Flowmaster 2 1/2in Cat-Back Exhaust, FlowTech Cut-Outs, Nitto DR's, 3.73 gears, FMS Aluminum DriveShaft, Pro 5.0 Shifter, Pro-Shift Lite, 8.5mm MSD Super Cunductor Plug Wires, PowerSlot rotors, PowerMaster 140amp Alt., LX lights, Cobra R hood w/SVO scoop, Saleen spoiler, Cobra Bumper, 3in chrome tips.

13.007 @ 108.39 w/ 2.149 60'

[blksunshine]

Would a lock up switch for the convertor help with his MPH.

------------------
Blk 94 Z28,355 c.i.,TRW forged pistons,Gtp Stage II Heads,
GTP 393 Cam,1.6rr,58mm T.B.,Moroso CAI,Hooker LT's,Borla,
2800 Vig,Ed Wright tunning,3.23's,Tranny cooler,Spohn LCA's

[Fred94LT1]

What do you mean? I mean I have a non-lockup 2800 converter and it traps pretty good,
Fred

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1994 Z28, A4,
BEST 1/4 12.413@109.55
BEST 1/4 MPH 110.49
BEST 60' 1.668
BEST 1/8 7.884@86.35
BEST 1/8 mph 86.77
Race Weight 3600lbs
DYNO: 324 RWHP,310 RWTQ

[96z]

It is a lockup convertor.

Fred I just took a look at my LT1 edit file and If Im looking in the right place the shift RPM is 5700

I hope thats not right!

[Stephen 87 IROC]

Race weight is not "without driver". The car doesn't go down the track by itself. The total weight of what the engine has to move should be known.

3535 pounds for the car plus your total weight with helmet etc may come to 3700 pounds.

A 3700 pound weight moving 107.97 mph in the 1/4 mile is using 363.47 HP. Looks a bit more than your dyno HP to me but he car's total weight could even be heavier. That's not converting for altitude, just how much HP is required to move that much weight. At higher altitudes the car will be slower because then engine doesn't produce the same amount of HP. At lower altitudes the car will be faster because the engine produces more HP.

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Stephen's racing page
or check out the race car

87 IROC SuperPro race car
461 big block
Best ET on a time slip: 11.589
Best MPH on a time slip: 116
Best corrected ET: 11.079

Altitude corrected rear wheel HP: 468
Best 60 foot: 1.646
Member of the Calgary Drag Racing Association

[Luna]

<font face="Verdana, Arial" size="2">Originally posted by 96z:
It is a lockup convertor.

Fred I just took a look at my LT1 edit file and If Im looking in the right place the shift RPM is 5700

I hope thats not right!</font>

What is the the shift mph set for? The RPM and MPH must be met for the shift to be commanded.