last year in nice weather went 12.8 at 105.44 with a low 1.8 sixty foot on drags last night for fun raced twice and it was really hot and humid but come on the best out of two runs was a pittyfull 13.56 at barely 100 mph with a 1.9 sixty foot on drags and since last years run were i went 12 i have cut the cats off removed back seat added csi water pump and got a pcm for less program so tell me humidity and heat cost me a half a second a 5 mph?? please help.randy

 

Weather conditions have huge affects on N/A motors, so it is more than likely that it cost you .5sec.

 

Heat and humidity cost you half a second and 5 MPH.
I don,t think some people realize how much the weather affects these cars.
Last year on a perfect weather day I ran 13.69@101, car usually was good for 13.9s
Since then I have put on LTs and a stall and Nittos and the car ran 13.60@102 in hot and humid weather.
It would not surprise me too lose half a second in high heat and humid weather, my car runs like crap in it.

 

Why not just use one of the online ET/MPH calculators to bring all your times to a standard baseline? That way you can compare runs made under differing conditions and get some more meaningful results. I try to note conditions on the slip, particularly if my figures don't match the ones the track prints on the slip.

 

thats nuts weather has that much effect on our cars i really hope that is the problem!

 

I'll say it again:

Humidity the LT1.

 

no way man

 

http://web.camaross.com/forums/showt...hreadid=161316
Check out this tread I started, they listed some good calculators. I've heard many times, temp, humidity and elevation play a huge factor. When it's hot and humid it's hard to breathe...especially if it's hot and humid in the mountains...the air is denser. Same with a car. That is just one example, kind of stupid, but makes some sense.

 

yes way

 

air is not denser in mountains vs sea level dense air is how you go fast.

Lots of people dont realize how much DA effects your timeslips. up here at bandimere, its usually about 1.0-1.3 second difference from sea level.

 

Actually, hot humid air is LESS dense. It's not harder to breathe, it's that you're getting less oxygen in your lungs with each breath so it feels like you just smoked 157 cigarettes. It's also why you will get out of breath much more easily in 100 degree whether than when it is 40 out. As the altitude goes up in the mountains the air pressure goes down, as you have less and less of the "sea" of air on top of you the higher you go. Colder air can also hold less water vapor which is why it will precipitate more readily in cooler weather if the humidity goes up. The point is, a car inhaling a given volume of air in colder, dryer weather is actually taking in more oxygen than one operating in warmer, more humid weather.

 

well that means your car is a slug. Low 13s with a 383
Id shoot myself.

 

lol @ ^--------

 

ya good call saint.

look at the 60' times. with a 1.8 60' more pcm work, and some weight reduction it will go 12.60-12.80s up here.

with traction id be running as fast as you plus the fact im at much higher elevation, id kill myself if i were you

 

Ok lets see here. You ran a blistering 14.1 with a 2.3 60'
Let say u manage to get a 1.8 that will be around .8 sec off the 1/4 time. SO thats STILL 13.3. I dont see how you going to lose another .7 with weight reduction..well maybe if u are planning on loosing around 700lbs


SO my car ran a 12.7 with a 2.25x 60' on street tires at the track thats 400 above see level. Even if i add a 1 sec to my time, thats still better then a 14.1, hell i dont even have heads or a 383. Just a stock 350 with a cam and not even all the bolt ons. Not making fun of you or anything, but you might want to get your car checked out, it seems like its down on power? Have you dyno it?What do stockish LT1s and LS1 run at the same track?

Marcin