thanks alot to everyones input. and i know my launches SUCK bad. lol. i cant keep 1st from spinning. and idk what elevation it is. but i had HELL OF A TIME. lol. i cant wait to put on my CAI and lsj dp and take it bck and see how much a diff it made. wont be much but a little is always better. and no i dont have a catback. im looking into one tho. thanks alot for all your input.

Luke.

 

thanks alot to everyones input. and i know my launches SUCK bad. lol. i cant keep 1st from spinning. and idk what elevation it is. but i had HELL OF A TIME. lol. i cant wait to put on my CAI and lsj dp and take it bck and see how much a diff it made. wont be much but a little is always better. and no i dont have a catback. im looking into one tho. thanks alot for all your input.

Luke.

 

my r/t .533
60, 2.526
330, 6.963
1/8, 10.596 at 67.87mph
1000, 13.703
1/4, 16.351 at 84.93 mph
that is not to bad is it?

 

Feather the clutch. Hold the rpms at about 2200-2500 rpm and quickly feather it off the line, little bit of wheelspin is ok.

Technique will take practice but i managed a 2.2 60 foot with balding tires on my bone stock 2.4 with only 2 weeks driving experience on a 5 speed last summer.

 

sounds about like mine. is yours stock?

 

I guess that would depend on what you drive lol

 

thanks. im going next sat so ill post up some slips then. i also got a vid ill load of me beating my friends focus. lol

 

Alright, good luck, i still got another month to wait before our track opens up. Remember, dont dump the clutch when launching, bad for your axles, diff and 60 foot times

 

05lscobalt If you could get that 60' down to a 2.2/2.3 you would be in great shape. you could do a 16.2 with a good launch. what kinda tires are you running? I ask the elevation because it makes a TON of difference. Look up your local track. they should have it posted. Also work on those RT's thats the worst of your problem.

Adam, you also need to work your RT's & launch. with a better launch you could get a 16.0 maybe even a 15.9! What elevation are you at?

 

it is a 07 cobalt 2.2 with cai and 2 3/4 cat back

 

Uhh no, dont even look at your reaction time, if they focus on that before they get their launch down, then they will just **** up their launch because they are too worried about getting off the line first.

R/T has nothing to do with the 1/4 mile time, u could sit there for 30 seconds and go and u still get the same time

 

auto or stick?

 

stick

 

You just need to work on your launch and u should be able to pull off a 16 flat. But the mods wont do much unless you get a tune for your car to take full advantage of them, right now they may have added a few hp.

2.5 60 foot means ur either getting way to much spin or have a very weak launch

 

i did not spin of the line but did going to 2nd
i was talking to some other people at the strip and thay told me not to give it alot of gas when i left the line

what tuning is out there for my car

 

Has anyone tried dr's on a stock 2.2?

 

running michelin 215/45/17's and yeah need to work on my take offs. lol. but ill keep everyone in formed on my build/times. thanks alot guys

 

What tire psi are you running? I run mine at 24psi when I'm at the track. It helps with the wheel spin. Lowered my 60 by .2

 

I have not seen anyone use DR's on a 2.2. I am going to get some when my car is running, so we will see.

I would imagine that you would be fine because the 2.2 doesn't make a lot of power off the line, you would just creep up and go. The only reason lsj owners always snap axles is because they get instant boost off the line, which makes the wheels hop and RIP. I won't be making boost instantly, it will spool right after the launch then liftoff.

 

it would be kind of interesting to see what a 2.2 can do stock with traction

 

on street tires, lowing the tire pressure usually wont help you much. Since the recommended pressure from the factory is what gives u the optimal tire grip because the whole tire is hitting the ground evenly. Underinflating them will cause the center to not properly make contact with the ground, thus less tire touching the pavement and less grip

If u got no spin and got a 2.5 60 foot then you need to give it more gas off the line. Do what i told the other guy to do. 2200-2500 rpm, quickly feather the clutch off the line, u get a bit of tire chirp which is fine. Means your right at the limit on how hard u can launch it witout wheel hop and snapping an axle

 

You are correct as far as tire wear, but as soon as you hit the gas, the G forces on the tire will expand the tire in the center making up for it. Listen to walrus, he is a local guy here with a LOT of drag racing experience.

Also the 2.2 needs to be launched at a higher RPM than 2200-2500. I personally launch around 3500 to 4000 so the car doesn't bog out. If you want a good launch you need to be in your powerband.

Where are your time slips? What kinda 60' are you pulling?

 

OBZ, I agree with UnLiMiTeD about street tires. I too have drag raced with street tires and found I get better traction when the tires are at or near recommended pressure. The sidewalls on a street tire are stiff compared to racing tires and the center "cups" up and rides on the sides of the tread when there isn't enough air pressure -- and you can see the results if you do a burn out, just look at the mark you leave: low pressure -- rubber on ground at outside of tread; normal pressure -- nice black patch all across.

You are correct about centrifical force but that isn't until you get the tire RPMs WAY up...but not at rotational speeds off-the-line.

 

Well i agree with you there, But i do not believe 24 PSI is enough to effect it like that.

 

That would be true if you were using a slick or a drag radial with a soft sidewall and a more powerfull car to get the gforce but these are N/A cobalts on street tires.

Also my 60 foot time was a 2.2 on stock psi balding pirrelis. 1/4 mile 15.66 @ 88 mph.

a 2.2 is less powerful then a 2.4 yes but not that much, also it has almost as much torque as the 2.4, it shouldnt need an extra 1000+ rpms at launch to get off without bogging if you feather the clutch properly