unknown pontiac

Last time I went out the the 1/4 mile I was traping 116. I was on shity stock size tires coopers I think. My 60 foot suck, my best was 60 was 2.3. I was doing low to mid 13", my best was 13.3.
Last night I hit the track again, I got better tires now they are 275 nitto 555. I was traping 112-113 all night. My 60ft I got it down to 1.9-2.1. My best run was a 12.5, I was running 12.6-12.8 all night. I got 15 passes in last night.
My times are better like expected but my trap speed went down, is there something going wrong with my car. Why is my trap speed down?

SuperSlow02

iTrader: (16)

As 60ft goes down so does trap, also DA may be a factor too

unknown pontiac

I been to the track and I hear about DA all the time. I really didn't care since I didn't go to the track much I know it has something with the weather or elevation but what is exactly. Sorry for the noob ?

thunderstruck507

iTrader: (18)

You're in Texas I see...it's hot and humid and the more hot and humid it gets the shittier the car runs.

shortdog

iTrader: (1)

Better 60's never hurt my trap. It either stayed the same or I gained mph, so I think that's a myth.

DA = density altitude. The lower the DA (more air), the better it is for performance and vise versa. Heat, high humidity and high DA will hurt performance/mph. That's why most shoot for great DA, low humidity and cool air for best ETs and mph. Ex: 50 degree weather, 30% humidity, low or negative DA. Unfortunately, some states don't get that great weather.

BayAreaSS

iTrader: (10)

I agree, I also think thats a myth. My car always traps the same or higher if I get a better 60ft

slayer performance

iTrader: (4)

most of the time i have noticed some tire spin normally raises your trap speed. if your hooking already and lower you 60 no it wont drop your trap speed.

SSmoked1

iTrader: (21)

I made 5 runs last night. All 12.7 to 12.9 @117 with 2.2 and 2.3 60's. My last run I cut a 2.0 60' and ran my best 12.5@115 which was my lowest trap but best et. It happens.

lemons12

iTrader: (71)

This.

Spinning will slightly raise your trap speed somtiles. Dead hook and it may drop one or two mph.

Just because you cut a quicker sixty foot, hooking both likes, most certainly does not mean you will mph slower.

You got the slips still?

unknown pontiac

That was my best passes last night. As soon as I got there I started running my car, I got a bite to eat and a restroom break, let the car rest for about 30mins and that's when I got my best pass. All my 15 runs were hot runs, one after the next. I don't have my old slips sorry! I can post up the other 13 if it will help!
Yeah the DA must of been high because it was hot and humid. Where can I find the DA?

69LT1Bird

iTrader: (1)

http://www.dragtimes.com/da-density-...calculator.php

SuperSlow02

iTrader: (16)

as others added, its not a myth. Is it absolute...no its not. As i said DA probably played in too. Plus im guessing this is a 6spd car so yes hooking will lower the mph since its most likely bogging. dont get all hung up on trap speed, your ET vastly improved...we aint driving hondas...

608kZ28

this

so many people have a hard on for trap speed. the difference between a time of 12.5 @ 115 VS a time of 12.5 @ 108 is that on the 115 trap speed suffered some wheel spin

lemons12

iTrader: (71)

It is no where near that simple.. If Im understanding you correctly. To think of it, if I understand you correctly that is actually wrong.

608kZ28

i never said it was that simple. its an opinion. so whats yours then?

BayAreaSS

iTrader: (10)

Well from my personal experience with my 6 speed car. The trap stays the same or goes up when I hook. I have never lost mph because of getting traction.

SuperSlow02

iTrader: (16)

Wasn't calling you a liar bud, just saying too many factors come into play with 60ft vs trap

BayAreaSS

iTrader: (10)

3.8to6.0

iTrader: (10)

For my mods, am I where is should be or is my car slow! If it slow what should it be runing. I was hopeing for low low low 12's.

s346k

iTrader: (4)

my experience showed that *slightly spinning (2.0-2.1) 60' resulted in a consistently higher trap speed. hooking the car (which meant slipping the clutch) was typically 1.5-2 mph slower, but always made it up at the big end of the track. blowing the tires off the car (2.3+) always made the car trap lower. that's one thing about m6 cars, with a bad driver (like me) the same car will trap anywhere from 103 to 109 despite the attempted same input. my automagic car basically trapped the same whether it spun or not.

one thing i did notice: my auto car would lose on the street to cars that trapped the same.

my m6 car will pull cars on the street that trap the same. weird. i guess it just goes to show that i can't drive hahaha.