motomadness910

So I have only drag raced my car 2 times and the first time i raced I had:
KandN Intake, Motordyne plenum 5/16 Iso thermal,Top Speed exhaust
My best time was a 9.519 and my average run was around a 9.6
I went out again yesterday and I got berk hfc, megan racing y pipes dropped my tire pressure to 25 and a osiris tune and my best time was a 9.512 again i was all over between 9.512 and 10.00. Is there any pointers I can use I have tc off and I rev my car and even tried shifting at different points im upset that my et isnt much better but if theres any advice itd be nice.
Thanks guys Btw: the track is at qualcomm and is in a parkinglot its kinda preped but its not an ideal track for best times
Lights were a tree setup Below are from last night with everything installed on the car tire was dropped to 25 psi and did light burnouts on dry surface no through water
Fast time:
Vehicle Reaction: .659
60 Ft: 2.361
MPH: 76.39
ET: 9.519

Second fastest:
Vehicle Reaction: .839
60 Ft: 2.402
MPH: 76.01
ET: 9.620

Third:
Vehicle Reaction: .541
60 Ft: 2.426
MPH: 76.65
ET: 9.647

Fourth:
Vehicle Reaction: .765
60 Ft: 2.436
MPH: 75.76
ET: 9.692

Slowest Run:
Vehicle Reaction: 1.255 ( i must have taken a nap or something)
60 Ft: 2.537
MPH: 76.01
ET: 9.908
Lastly i have a dyno from when i got the tune I have been using the tiptronic and shifting as close to redline as i can by the looks of my dyno sheet where should i be shifting?




Thanks for the time/help guys

03threefiftyz

iTrader: (25)

Post up the intervals (or slip).

davidv

iTrader: (2)

EDIT. My apology. I have no experience driving a automatic transmission.

glenns280

motomadness910

Time slips up sorry ya that prolly would help

Jairen

iTrader: (1)

Was that you I raced last night? I was there in the white G35.

My best time last night was 9.0@80 with a 2.2 60ft.

Jairen

iTrader: (1)

3.7 final drive, Transgo, and drag radials and you'll be in the 8's.

motomadness910

ya that was me what do u have in ur g35 ? You were car 4025 right? u ran a 9.4 and i ran a 9.8

Jairen

iTrader: (1)

Yep, I was 4025. That was my last run of the night. Lot's of wheel hop on that run.

Mods are:
5/16 spacer
Test pipes
X02 Exhaust
Osiris

To be honest, if you get your 60 ft's down to 2.2, you'd be up there in the low 9's at least. How are you launching?

motomadness910

Pmd u jairen

davidv

iTrader: (2)

No need to post dyno charts and mods. These are trivial details. 2.3 seconds speaks for itself.

Who told you to run 25 PSI on street tires?

Don't be too hard on yourself. Poor staging pad preparation and 2.0 seconds is impossible. You need a real dragstrip with professional preparation.

motomadness910

well i just thought itd post everything possible ha but as far as the tire pressure i read up and some people said 26 was good. so i thought id drop it but was that a bad idea to drop tire pressure?

davidv

iTrader: (2)

You can experiment; however, street tires are designed NOT to flex. I run 30-35 PSI on street tires. 25 PSI offers way too much rolling resistance.

motomadness910

next time i go out ill be sure to experiment ill try and keep it around 30 then thanks david

davidv

iTrader: (2)

Good. Looking forward to you joining the Top-25.

03threefiftyz

iTrader: (25)

Keep one thing in mind when you lower tire pressure.....most do it as soon as they hop off the highway (longer drive) and enter the track. Dropping the tires to 25 psi when hot will likely be more than you wish to in reality. As the tires cool the pressure drops considerable.....that 25psi might be closer to 21 by the time the tires cool b/w runs.....particularly if the track is crowded. Happened to me last Dec....went into the lane with 15psi in the tires.....temps quickly dropped from 50's to 30's and several stoppages happened....causing a 90 minute delay b/w me entering the lanes and running. Thought about it just before hoping in to run and checked.....tires had dropped to 8-9psi. Had to abort the run.....there was no way to back out of line, etc....just cruised down the track at a cool 15mph. Also, general rule of thumb is every 10 degree drop in outside temperature will lower tire pressure by 1psi.