JDU2002SS

Made it to O'Reilly Raceway Park yesterday for the opening day of test and tune and wasn't satisfied. The car is a 2002 M6 Z28. MS3 Cam/Valvetrain Upgrades, Long Tubes, ORY, Borla, pro5.0, spec 3+, 4.10 10 bolt with a girdle, 3pt subframe connectors, poly ta mount, control arms, strut tower bar, 12 way QA1's, on BFG G-Sport street tires. I got 3 runs in and below are the times


................Run 1..............Run 2..............Run 3
60ft..........2.218..............2.454............ ..2.242
330ft.........6.091.............6.215............. ..6.013
1/8............9.120............. 9.124.............. 8.955
1/8 mph......83.06.............85.37............... 84.76
1000ft........11.634............11.578............ 11.428
1/4............13.711............13.620............. 13.485
1/4 mph......109.18............110.66.............109. 94


What do you guys think? I was rolling into 1st not dumping the clutch and It was wheel hoping pretty bad in 1st and very bad in 2nd. I know its on street tires but i was hoping to do better than that. Anything i could do with my current setup to get better ETs?

fucter

iTrader: (5)

On guessing, ta and slicks. I ran that last year with just lid and headers on sumitos. You should be significantly faster.

JDU2002SS

I know. I was expecting a lot faster. Would the TA take care of the wheel hop? Im pretty sure thats where i was losing most of my ET. That and street tires.

TheBlueKnight

iTrader: (4)

Well, your bad 60ft isn't explaining your trap speed. My bolt on car traps 113mph at sea level and 107 at 6500ft. What was your DA?

fly pantera

iTrader: (9)

yeah man da is a big factor,how was your hydralics/shifting
what were u shifting at and whats you raceweight

reeperz28

iTrader: (1)

Wheel hop, I would start with your lower control arms and rear shocks. Tubular non adjustable lca's can get for around 100 bucks. Than rear shocks auto store it helped me a lot and made my car plant harder. Then do a t/a

reeperz28

iTrader: (1)

Just saw you had contol arms, man I just put lca's and panhard bar and new rear shocks and made a hell of a difference. I would look into a misfire or ect or trans for the low trap times.

GtoSpd

iTrader: (2)

Where were you shifting, what RPM? Also, walk us through your launch procedure, from the time you roll up to the water box until you are off the clutch and WOT. Also noticed you have a lot of mods including a cam, but wheres the tune?

JDU2002SS

I'm not sure of DA or the hydraulics. My shifting
Was good and smooth. I wasn't WOT shifting but shifting quick. As far as the run went, my fastest pass was 25psi tire pressure and the shocks were pretty soft. I drive around the burnout out box, spun the tires clean, staged, around 2500 rpms I would slip the clutch some the go WOT, shift at 6000-6200. Then pass the quarter and shut down.

GtoSpd

iTrader: (2)

Tune?

JDU2002SS

And I bought the car as is. Previous owner said it was tuned. Drives, runs, idles fine so I'm assuming it has some sort of tune.

SWEET98SS

iTrader: (8)

My car with 405 rwhp, 6 speed, stock 3.42 gearing was going 12.5 113 to 115. Something sounds off. What did it dyno?

JDU2002SS

No numbers. Previous owner said he went 13.1 at 112.9. I bought the car in Michigan where it was tuned and ran at the strip. Would the car run different from MI to IN?

MFJ

iTrader: (4)

For that 60' and 1/8th mile time its pulling hard on the big end. I'm a little stumped especially with all those mods.

CLRD4TO

iTrader: (4)

My nittos take a lot of time in the box before they'll stick on the line. Back into the box and burn the snot out of them. As far as your wheel hop, does it hop at all on the street? If not, your spinning tires and vht on the track are probably causing the hop. Stop the spinning and you should have no issues. With your trap speed, you will be mid/low 12's if you get that 60' time down.

JDU2002SS

I'm still on street tires. I don't think burning them up would help. And no wheel hop on the street. Just spinning. I think the major wheel hop is what is hurting me.

CLRD4TO

iTrader: (4)

Mine are street too, 275 nt555, not DR's. I ran almost the exact same time slips doing a small burnout before the line. Spun all through 2nd gear. I forget the DA last year but a 2.0 60' got me a 12.4x time, you have more mods than I do and you should get a faster et. Launch at a little lower rpm to help the grip and roll into wot, 2nd gear will plant if you can hold 1st gear powerband at wot.

JDU2002SS

I'm still on street tires. I don't think burning them up would help. And no wheel hop on the street. Just spinning. I think the major wheel hop is what is hurting me.

JDU2002SS

Sorry Bout last post. I'm on my phone. But I'll try. 1st gear has
Wheel hop in the high rpms. All second gear is wheel hop

JDU2002SS

I've also got the DA for the 3 runs.

Run 1
Density Altitude: 1936 feet
Relative Density: 94.46 %

Run 2
Density Altitude: 2205 feet
Relative Density: 93.71 %

Run 3
Density Altitude: 2213 feet
Relative Density: 93.68 %