Shifting through the 1/4 mile
Thread Starter
Scammer Alert!
iTrader: (9)
Joined: Apr 2007
Posts: 461
Likes: 0
From: Richmond, Illinois
Shifting through the 1/4 mile hey everyone i have heard from several when dragging at a 1/4 track you only wanna go through 4th gear, in my only appearance, i found right before the end of te 1/4 everytime if i didnt shift into 5th i would redline, what may have caused this? was i shifting prematurely in the previous gears, or is it just the stock 323's in my rear? also is 18 psi a good seat for the rears? and do i wanna launch the car from 0-or like 3k rpms? how long does everyone let there cars sit in between passes?
Thread Starter
Scammer Alert!
iTrader: (9)
Joined: Apr 2007
Posts: 461
Likes: 0
From: Richmond, Illinois
well i tried downshifting at to high of speed and tottally bent 2 pushrods so i went with some chrome moly, how about launching.. what do you think? so i do have 342's? i have abs and traction control if that matters
Thread Starter
Scammer Alert!
iTrader: (9)
Joined: Apr 2007
Posts: 461
Likes: 0
From: Richmond, Illinois
all i know is my car was untuned when i took it there and the next day i ad it tuned and te guy said i had alot of detonation, and the timing was all off by like 9 degrees? all i know is she runs better than she ever did after the tune, and was wondering if the detonation and timing being off would have effected the way the car was performing as far as shifting goes
Trending Topics
no, tuning has nothing to do with gearing, maybe you have 4.10's and you dont know it? 3.42's take 4th gear way past the 1/4, or is it 4th that you want to shift into at the end of the 1/4? As far as launching goes, every car is a little different and only track time will give you that answer.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo Thread Starter
Scammer Alert!
iTrader: (9)
Joined: Apr 2007
Posts: 461
Likes: 0
From: Richmond, Illinois
i think i figured it out, i remember when launching i was spinning the tires alot, im tinking since i was spinning it was revving really igh causing me to shift into second waay to early, when leaving the tree on green, should i be easing out then nailing it of the block or moving like a bat out of hell?
spinning off the line=higher trap speed, higher e.t
hooking=lower trap, lower e.t
As far as hooking goes, there is a fine point that your car will launch great from but you have to find it. You will find your rev point...say 3k and then a quick slide out of the clutch. You should hear a chirp and grab.....well mine chirps anyways but its a quick drop of the clutch and the car doesnt bog but it doesnt spin. Took me many launches t find it. Find a local 1/8th that isnt too crowded and work on your 60's.
hooking=lower trap, lower e.t
As far as hooking goes, there is a fine point that your car will launch great from but you have to find it. You will find your rev point...say 3k and then a quick slide out of the clutch. You should hear a chirp and grab.....well mine chirps anyways but its a quick drop of the clutch and the car doesnt bog but it doesnt spin. Took me many launches t find it. Find a local 1/8th that isnt too crowded and work on your 60's.
someone has put different gears in it. if you are shifting to early like you say you aree, that would lower the RPM's sooner and put you lower at the stripe. in my car, i cross the line at 4800 RPM in 4th at about 109MPH.
ok if you have 3.42s then 4th gear will take you to 144 mph at 6.2k.
if you have 4.10s then 4th will take you to 120 at 6.2k.
if you have 4.56s then 4th will take you to 108 at 6.2k
thast based off of your tire size (245/55/16) which would be 26.61"
and in order to find out what gears you have, you have to count how many times your tire rotates in 1 revolution of the DS.
hope that helps.
brandon
if you have 4.10s then 4th will take you to 120 at 6.2k.
if you have 4.56s then 4th will take you to 108 at 6.2k
thast based off of your tire size (245/55/16) which would be 26.61"
and in order to find out what gears you have, you have to count how many times your tire rotates in 1 revolution of the DS.
hope that helps.
brandon
honestly...youre just driving bad...
my buddy was complaining about his ET when we went to the track one day..saying he missed 5th right before the traps...
bottom line...if youre going into 5th, your short shifting something horrible. Just like demonic posted above...even with 4:11's in the rear, you wont be going into 5th.
You just need to practice and get your driving down.
my buddy was complaining about his ET when we went to the track one day..saying he missed 5th right before the traps...
bottom line...if youre going into 5th, your short shifting something horrible. Just like demonic posted above...even with 4:11's in the rear, you wont be going into 5th.
You just need to practice and get your driving down.
245/55/16 no syuch tire its a 245/50/16 is stock size and there 24.50" I know thats what is on mine ....did you buy the car used???you said the tuner said the timing was too high....sounds like hypertech had ahold of it one time or another.....and im bettin there is 4.30s in that car maybe 456s....hell take it out get up to 60 in 4th come back and tell us what rpm you are at.......
12s on street tires is pretty good though
12s on street tires is pretty good though
I know this car and it definitely does not have anything higher than 3.42's in the rear. It was a bone stock formula when my buddies gf bought it and then ricky bought it off her. I have no idea why you would be running out of gear as it doesnt seem possible. Im pretty sure the tires are right around a 26" as well.
Thread Starter
Scammer Alert!
iTrader: (9)
Joined: Apr 2007
Posts: 461
Likes: 0
From: Richmond, Illinois
oh i will agree 100% it was bad driving, it was my first time there, what i wanna know is when at the strip what is a good rpm to shift at...? or better yet what is redline?
Im pretty sure the tires are right around a 26" as well.
maybe the clutch was slippin i dont see how bad driving would cause it to be at the redline through the traps.....
wtf
Originally Posted by 99FormulaM6
4.30s or 4.56s in a stock 10 bolt? uhm, no