They are pretty accurate, but that is on the street and not on a track and I don't believe any of it anyway.

 

there are too many variables on a 1/4 track to allow for accuracy with the Gtech.
I used to record my runs all the time to analyze my shifting and based on the gtech compared to timeslips I was always almost 2 seconds faster...

 

so let me answer ur q first...'
nismo cam...
3 angle valve job...
dual valve spring custom...
aebs custom kit:
ross 8:1 piston...
puater rods custom...
crank...
Bore: 96.5mm
Stroke: 86mm
greddy tt w/fmic
678hp w/16.8psi

 

w/ drag tire size 17x 13
w/o drag tire size 275/30/19

 

at final drive

 

Dude just stop your still full of $hit. You dont lose 20mph in trap speed because you ran on street tires, GTECH or track. And who the hell made you custom valve springs? Why do that when there are companies such as JWT and Ferrea that already make great set-ups for our cars? And the AEBS stroker kit is its own kit, you are saying they opted to use Ross Pistons and Pauter rods for your set-up? What offsets do you run on your 17X13 " wheels to not rub? Look Ill make you look dumber, what fuel system did you decide to go with to support all your power? Go do some more research on the Z and post your response

 

I about fell out of my chair laughing.

Go to the track and provide some real times.

 

1) i do my engine before aebs have the kit.... that is why is custom
2)all the spring shop will make custom spring....
3) if u dont belive me then u can race me any time u want (pm me if u want)
one thing ... i know g-tech is off a little, but if u are on the nice road, u will have very close time

 

go to a NHRA sanctioned track, run and post the timeslips and no one will laugh at you until then you're on your own...

 

I'll repeat myself, you do not lose 29mph just from switching rubber.

 

14.35 @ 99.1
9.37@78.0
2.28 60'
92 Degrees
38 PSI .....I need some advice

 

That is pretty normal for a stock Z...........lower your tire pressure and work on your launches.

 

Do you think I can get close to 13's with lower temp and tire pressure?

 

definitely. also try to put a bag of ice on your plenum between runs. It gets scorching hot and with ice you can lower your intake temps alot and it really helps. youd be suprised.

 

I did with a heavy touring model and a 5AT.

 

You can get into the 13s with good weather and some good driving without lowering your tire pressure at all.

I ran 13.92@101mph with a 2.04 60' stock in 95 degree heat.

In nice cool 55 degree weather I ran 13.68@103mph with a 2.09 60' also stock.

 

thanks for the input...ill see what happens tomorrow when I go and I'll post

 

Ok... It's a mixed emotion day, lowered the PSI to 31
1/4 - 14.2 @ 95.5
1000' - 11.9
1/8 - 9.2 @ 78.6
60' - 2.2
I had a 2.1 60' but I mashed 2nd gear like some homestyle potatoes. I decided to take her in after that

 

You are getting better. I run 25# HOT.

 

Ya, I was just testing how much PSI would do difference..Next week I'll go out and see what 25 can do me