jmm98LS1

iTrader: (28)

Here's a vid of a n/a pass:

http://www.youtube.com/watch?v=Hj6cctGAH3w

The car has the following setup:
Front
-swaybar removed
-kyb agx adjustable shocks set to full loose
-eibach pro-kit springs

Rear
-full length adj torque arm w/relo crossmember
-spohn adj LCA in bottom hole of relo brackets
-stock rear springs, strange SA shocks set to 6 on both sides
-bmr extreme drag bar, set level (no preload)
-4.33 gears, 28x12.50 et streets at 14psi
-car makes 500/450 at the tires n/a
-race weight is 3890lbs (its a street car and I'm big boned )

I'm using a 2 step this year for the first time, and I started out at 6000rpm in the vid I posted and continued to blow the tires away run after run, lowering the 2 step 500rpm at a time until I quit at 4000rpm with very little improvement to traction or 60ft times. Best 60 for the night was 1.69, worst was 1.89. The track was prepped fairly well, my buddies were lifting the fronts and cutting low 1.5's all night. I'd like to get this thing launching decent off the 2 step before I turn the bottle on.

I'm guessing the crappy front suspension from the car's previous pro-touring life is a problem, and it's not transferring weight like it should......but would like some confirmations of this before I blow the cash, and perhaps some recommendations on what parts people have had success with on a heavy car. Any recommendations on LCA & shock adjustments in the rear would be appreciated too! If I left out any info let me know.

5.3LJimmy

iTrader: (10)

It's hitting the tires hard and bouncing them back up(like dribbling a basketball). Try about 18 PSI in the tires and tighten the rear shocks to soften the initial hit. When it's time to buy tires swap to the 28x10.5S as the stiff sidewall will take the hit better with less sidewall compression.

AChotrod

iTrader: (17)

Your buddies prob have autos lol.

starbucks

I think you need to bring the pressure down to about 10 pounds and try it there. My car was doing the same thing until i lowered the pressure in the tires. now i run no more thna ten psi when i run and wnet from 2.0 60 times to 1.59 60 times. Oh and you have to get some good front shocks because the touring shoucks are defniatly not letting the car tranfer.

starbucks

here is what the car was doing on high air pressure.
http://www.youtube.com/watch?v=nvmyGcyeAFU

and here is what the car does on 10 pound of air versus 15 pounds

http://www.youtube.com/watch?v=71CVQyFB0og

By no mean have i got this comlpetly figured out yet but i am getting closer. i think the car needs more gear to help me get out better and to keep it from bogging.

DTB_LS1

iTrader: (2)

Are you slipping or dumping the clutch? I had the hardest time getting my car to 60' and I found out that I was doing everything wrong. lol I had the tire psi too low and was just dumping the clutch off the 2-step. This caused the car to either hook and bog or rebound too hard and blow the tires away. After a little practice and some help from (98blueSScamaro) my car cuts low 1.5s high 1.4s and will prbably get better with more practice. Now I have my tire psi set at 14psi and I quickly slip the clutch off the 2-step.

Here's my car at 10psi and dumping the clutch.
http://www.youtube.com/watch?v=xxkTd...eature=related

And here it is at 14psi and slipping the clutch.
http://www.youtube.com/watch?v=FktmGvUQub8

1904gto

iTrader: (4)

good read i having same problem but in my gto im ordering 2 step next week and my diamond stg 3 clutch going in tomorrow then track!

jmm98LS1

iTrader: (28)

I'm dumping the clutch, but only because that's all the clutch can handle. I've got a spec 3 in there at the moment and if I slip it, it'll be dead in no time. I'm hoping to put a twin disk in very soon that I can quick-slip off the line. Your car leaves nice, care to share some details on the setup? I'd be happy as **** with low 1.5 s high 1.4s!!!!

Zmg00camaross

iTrader: (11)

Damn the Raceweight is killing you lol. I also started to slip the clutch and 60 ft did help me also.

TAGOES11S

iTrader: (13)

In the waterbox, put the car in Second gear and put a lot more heat in the tires. Hold the rpms up in second until you see a good amount of smoke in your side mirror then pull out of the box and as the tires are starting to hook push in the clutch to keep the heat out. You want to be dumping the clutch not slipping like others suggested. Just need to figure a few things out on how to make it work.

I went away from the 28 Stiffs and back to 28 et streets and my 60 went front 1.42's back up to 1.55-1.60's. Put the stiffs back on and right back to 1.42's. Next set of tires switch to ET drags. ps I have a set of ET strees for sale with only 6 passes on them if someone is interested

nocooler

iTrader: (5)

From what I can see (without being able to slow it down) - it's hitting the tire to hard, and bouncing and unloading.

Move the control arms back to the stock holes and try again. It only takes 15 minutes to do - and shouldn't change the pinion angle.

Here is a video of mine doing similar.

http://www.youtube.com/user/nocooler#p/u/4/m1qheDMgTwE

after I moved mine, my car started dead hooking and bogging. I need to practice quick slipping it.....

DTB_LS1

iTrader: (2)

My car is a cam only setup.
Speedinc SI5 cam (231/237 .589/.595 112lsa)
FAST/NW 92/90
1-3/4" LTs
4" exhaust
EWP
85mm maf
98mm lid
Chris1313 ram air
Built t56 w/Mcleod RST twindisk
Moser 9" w/4:30s
UMI k-member w/lower a-arms
UMI tunnel mount adj. t/a
UMI adj. lca's
UMI adj. phb
UMI adj. drag bar
UMI sfc's
Strange double adj. coilovers in front w/300lb springs
Strange single adj. shocks in the rear w/stock springs
And a decent amount of weight reduction.

nocooler

iTrader: (5)

I'm hoping my SI5 cam + stage 2 LS6 heads runs as good as your car

RamAir95TA

iTrader: (2)

You've got some serious wheel hop issues. I'd try a lower pressure, LOTS more heat in the tires, and adjusting the LCAs.

meatman

iTrader: (20)

Ya that would be me with the auto cutting a 1.53 first time out....

01sscam

Take the tires down to 10psi, launch at 6800.....

Mikey 97Z M6

iTrader: (37)

Couple things I see:

Looks like you need to tighten up the rear shocks for sure. As mentioned before, it's hitting hard and bouncing back up which unloads the suspension. Let the rear shocks do their job (by tightening) and run the air pressure your car likes best. Hopefully the S/A rear shocks will have a setting that works good for both the rebound/compression. Often times a stick car will need a slightly looser rebound setting to dial it in, but obviously you can only do that with a D/A shock.

Doesn't look like the front suspension is responding very quick to the weight transfer either. Not sure if that's because the rear is unloading too quick, or if you need a looser front shock/front suspension movement.

Fix these two issues and it will be launching much better IMO.

Mike

223HAWK

iTrader: (11)

^Finally someone agrees doubles in the rear!!

I have no room to talk, my junks not near as fasst but If I do a quick slip mine seems to 60 better..I use to just dump it off the 2 step and it would hook hard and then bog, let it slip a little, IMO Specs blow so Id burn it up as fast as possible and get something better.

Air Pressure and Slip it a little would be what Id play with next time.

mynameisray

iTrader: (4)

That cam only camaro is a bad mother effer