60 foot time

[THREEBLOWNGTS]

I need some suggestions on how to get a better 60 foot time. I have a 1988 GT with a 600HP 347 that runs 10.62 best time at 128 MPH !/4 mile. I am happy but I was told my 1.56 60 ft time had room for improvement, but not sure what to do. I have a 4500 stall with a c-4 manual valve body, 3.55 gears, 9" slicks, great weight transfer, it pulls the front wheels. Any ideas please fire away. Thanks Ron

[BurnTire]

What is your suspension setup?

[THREEBLOWNGTS]

I have Eibach drag springs on all fours, 70/ 30 fornt shocks, after market upper and lower rear control arms with nylon bushings,and a right rear air lift bag, weld in sub frame connecters. I think the rear shocks are stock. Ron

[BurnTire]

A stiffer control arm bushing will reduce deflection. I have solid / spherical bushings at all points. Pinion Angle is another factor. Does you car twist on launch? An anti roll bar will also allow the tires to plant evenly.

[THREEBLOWNGTS]

The car does come up higher on the left front, so yes it is twisting. I was wondering if 50/50 rear shocks and an antiroll bar might work. You also mentioned pinion angle, I don't have adjustable control arms. Ron

[BurnTire]

Eliminating deflection and twisting will help. You are putting down a good amount of power to a light car. I would estimate that 1.3's are not out of the question with a good setup. I run the Tokico shocks in the rear. Pinion angle is important also, but you would need to upgrade the control arms to make it optimum.

[THREEBLOWNGTS]

Do you suggest that I run adjustable upper control arms or upper and lower both? Also are your Tokico shocks adjustable? Do you have any suggestions for what brand antiroll bar to buy? I am curious does your Cobra have a straight rear end in stead of the IRS? Also how much HP is your car making. Ron

[BurnTire]

Do you suggest that I run adjustable upper control arms or upper and lower both? Also are your Tokico shocks adjustable? Do you have any suggestions for what brand antiroll bar to buy? I am curious does your Cobra have a straight rear end in stead of the IRS? Also how much HP is your car making. Ron

The Tokicos are adjustable.

I have a new solid axle in my car that is still work in progress. Car is probably 630+ on the race tune.

I use steeda weigh jacker lowers with delrum bushings on the chassis side / spherical on the axle side.
http://www.steeda.com/images/weight_jacker_lca_175.jpg

Steeda also make a hardcore lower control arm if adjustable ride height is not something you want.
http://www.steeda.com/images/555_4400.jpg

I use steeda double adjustable uppers with spherical bushings on both sides.
http://www.steeda.com/images/hd_adj_urca_175.jpg
Housing Bushings.
http://www.steeda.com/images/555_4103.jpg

Pinion angle is set at -2.

I am still waiting for my Miller Race Cars Anti Roll Bar which can be used with tail pipes.
http://www.millerracecars.net/antiroll.html

Do you run tail pipes or dumps on the car? Steeda has a new anti-roll bar that works with tail pipes also.

If you need anything check with our sponsors they can take care of your parts needs.

[BurnTire]

Good reading on the physics of launching.

http://www.baselinesuspensions.com/info/Launching_A_Drag_Car.htm

[4Jenna]

Street Car?
What Power Adder?
Leaving on the Brake?
Vehicle Weight?

[THREEBLOWNGTS]

The car weighs 3440 with me in it , yes it is a street car with a 6 point cage and full interior and sound deadner. The motor is a stock block 347 with Ebelbrock Performer heads, not ported,Edelbrock intake and a S-trim Vortech. The car has full length 13/4 headers and full exhaust. Yes I leave on the brake, I have no trans brake.

[THREEBLOWNGTS]

I appreciate what BURNTIRE has told me about, very helpful. Also I forgot to mention I am running 14 pounds of boost.

[BurnTire]

I appreciate what BURNTIRE has told me about, very helpful. Also I forgot to mention I am running 14 pounds of boost.

There are many options out there that will work. Steeda is my choice of parts. I know some people also have good success with the HPM Mega Bite JR lower control arms. Dust off that credit card.:bouncy:

[4Jenna]

Get a transbrake, and 2 step....build a lil boost on the line put a load on her, otherwise I dont see you going low 1.5s to 1.4s.