1st run
no passenger
tire pressure 30 psi with no spin
93 octane



2nd run
130 pound passenger



3rd run
130 pound passenger again



4th run
no passenger




it didnt go as well as i thought it would since my last track day i got the time in my sig which was with 50 psi in my tires but it was 42 degrees out, so i guess the heat might have made me slower or maybe the humidity, what do you all think?

 

did you run it in L?

 

good runs, keep it up and hit make those 15s consistent. How about getting a vector tune man.

 

yeah i drove it in L gear and after 1 and 2 shifts i switched to I to finish the race. id love the vector tune but it would be a waste since i have to send my ecu to hahn racecraft for the turbo kit and have it recalibrated from westers tune.

 

that's not bad for an auto 2.4 what strip allows passengers?

 

yeah, im gonna try and go back in the fall at a colder temp and i bet i can get at least a 15.5, and my strip allows passengers as long as they have pants and shoes on, no shorts or anything, my little sis wanted to ride with me

 

well you got a 30 degree difference from last time and this time so I think the temp made up and just a little more for the 50psi in your tires last time. Good times. Just curious is the altitude of Pittsburgh 1250ft(give or take)? If so since San Antonio is 800ft will I get a faster time?

Note:I got the altitudes from some weather internet site.

 

I thought your times were off so I did a rough calculation of the density altitude.

You were at Race Way park, right?

I used weather data from Monroeville

853pm 66F, dewpoint 65 F, 1250 ft alt, 30.08 pressure---2092 feet--explains your slow times.

I come up with a very likely alt corrected of 15.69@ 87.26. Of course if my data is a bit off--so are the results....but it pretty obvious that the DA was alot more then 1250 feet.

Go back when its really good weather--high pressure--low temp

 

yes, track elevation is 1250. 15.6 sounds about what it should have been, possibly lower if i can get my reaction times better. im gonna go when the temps get into the 60's or 50's probably by september

 

the 1/8th in polk city allows passengers they just have to wear a helmet

 

yeah report back when conditions are better. BTW---rt has nothing to do with et

 

waaaaaaaaaaaait a second. there is a strip in polk city????

 

Good math work - for most conditions/temperatures the standard density altitude corrections hold true. Here in Denver, Bandemere's NHRA track is above a mile high and the corrections are stretched to the limits (and times for naturally aspirated cars are considerably lower).

For a lesson in the effects of temperature, humidity and barametric pressure on density altitude, see: http://www.asmartin.com/weather.htm

 

Did you try to launch it, like jam on the brakes at the line and bring the rpms up and let go of the brake when the light hits? cause before i got my 2.0 s/c i had 03 cavalier 2.2 and was putting consitent 15.8-15.9 1/4s in houston and that was bone stock 122 whp

 

I don't have any 1/4th mile times... but I ran 9.9's in the 1/8th at 72 or so... I say drop your tire pressure another 5-10psi... and do what you can to ditch weight (spare, back seat).. should get you another couple of tenths.

You definately weren't getting on it hard enough off the line if you had no tire spin... my tires would spin for the first second or so before they caught... I could have sworn they didn't... but my friends that were watching told me that the tires were slipping.

These are definately 15 second cars... keep trying and you'll get the right combination of tires, weight, and temperature.

 

finally--some one who understands what high altitude does to a cars performance! There aren't enough of us on the board! lol

Nice lookin' 4 dr SS you have

 

well, i dont think i could have launched the car any harder since tq braking wouldnt let me, my tires could have been spinning but i couldnt feel it, when i was at 50 psi in thm i could definately feel them spinning.

 

not to bring up a dead thread but any newer times a buddy of mine might be buying a 2.4 right now and he was wondering how much faster it would be compared to my 2.2 i thought the 2.4's were about .5 faster but ive ran a 15.8 in my 2.2 with intake only i now have an exhaust also after he get the hang of racing it what should he expect for 1\4 times

 

as long as its auto vs auto or standard vs standard...0.5 is probably a close number. COuld be a smidge higher. And the mph should be noticeably faster--the 2.4 has way more top end.

 

hey thanks it gonna be standard vs standard well see how it come out i just got a video camera so i might gewt it on video

 

Thanks for the compliment! A highway-wide pothole killed my stock wheels, thus the AR's (although I've grown to like them better than the stockers). I really like the Lazer Blue - my dealer had to trade a stripper model for mine from another dealer. It was that or Sunburst Orange, which my wife likes better. I actually wanted black, but was talked out of it by my wife.

 

yeah when I first saw the laser blue come out of the garage just after they washed it, before handing me the keys, my mouth fell right to the floor

For the 1/8th time, I did 10,36 with tires at 25 psi... R/T of 0.004 (track record ) I haven't tested on the 1/4 yet, I'll need a new clutch before I try it... any recomendations that wouldn't affect warranty?

 

Why the 93 octane???

 

What else would you run?

 

buy a gm clutch and have it installed by gm thats the only your gonna keep it i think