Freudenthaler

I have a 2006 350z touring 5at close to FBO with uprev dyno tune. And in the 1/4 I’m trapping 13.8s at 99-100mph, I really think my trap speed should be higher... and recommendations. Also I have 3.692 gears.
My mods are: 3.7 gears, 5/16 spacer, Admin 3.5” intake, NWP 75mm Throttle Body, Spec-D Exhaust, 1320 resonated Test Pipes.
254 wheel horsepower (Dynojet)
236 wheel torque (Dynojet)
My Best Quarter Mile slip
60f: 2.104
330’ 5.850
1/8: 8.929 @ 79.87
1/4: 13.810 @ 99.65mph

813_350Z

Boost

travlee

iTrader: (8)

Ls swap

Freudenthaler

I mean like I see other DE Z’s run similar times but with trap speeds of like 103-104

MicVelo

Maybe they’re running slightly more power with higher (stock 3.54) gearing.

jhc

If you are concerned about 4mph in a 1/4 mile run you have a lot of extra time on your hands. For the a/t you don't mention installing a TransGo valve kit. That is your next upgrade.
The other thing to consider is your shift point- are you shifting manually or in Auto Mode? If I were you I'd make 2 more runs, 1 shifting at 5K and 1 in Auto Mode, see which one is better. The tranny isn't going to know you changed from 3.3 to 3.7 but that's a huge advantage of a line.

travlee

iTrader: (8)

Maybe they are better drivers

Freudenthaler

On my tune my stock rev limiter was raised to 7,200 that’s where I’ve been shifting at. Stock rev limiter with 3.7 gears 3rd gear ends at 98, and with the raised limiter 3rd ends at like 106

bealljk

iTrader: (13)

Drop weight ...

you'll pick up speed on the top end.

Start by doing all the free stuff (for the track)take everything out of the car, remove passenger seat, remove spare tire/jack/tools, 1/2 tank of fuel (dont go below 1/2 tank IMO - you need some weight over the rear wheels)

if you want to spend some money:
Lighter wheels
lighter/light single exhaust
light weight battery

Freudenthaler

that’s a good idea, also I launch at 2000-2200 and I have never had any problems with traction... also how much would headers and cams help my car? Worth it?

bealljk

iTrader: (13)

headers nothing
cams a good amount but they are difficult to install and expensive to purchase

You've really covered all the easy / bolt-on items (other than the motordyne plenum) and if you want more power you need a turbo or supercharger...

I would turbo or supercharger before I did cams and (despite the popularity - sorry Trav!!) I wouldnt LS swap - too big of a task/too many things to go wrong for 400hp when you put a turbo/supercharger for less money and less hassle.

jhc

[QUOTE=Freudenthaler;11006968]On my tune my stock rev limiter was raised to 7,200 that’s where I’ve been shifting at. Stock rev limiter with 3.7 gears 3rd gear ends at 98, and with the raised limiter 3rd ends .

The torque band for the VQ35 tops out at 6200rpm. A stock engine literally has no more power to give after that regardless of gears. Think about it and read my comment again. That high shift point may be exactly what's off for you.

DarkZ03

iTrader: (11)

I would trap 105 with intake, plenum spacer and exhaust, no tune and stock gears. That car had 254 whp.

terrasmak

iTrader: (8)

That looks pretty good, plenty of NA times are posted in the drag sections

iideadeyeii

iTrader: (6)

295whp 335wtq 12.9 108 trap /shrug

No point to shift past 6600 like JHC said. There's no power up there

Freudenthaler

see dark that’s what I’m wondering, why am I trapping so low considering we have about the same power. 6mph is pretty significant..

Freudenthaler

What’s your set up? Those are some impressive #’s

DarkZ03

iTrader: (11)

Either his numbers are a typo or he has boost/bottle. Torque is too high for NA.

DarkZ03

iTrader: (11)

Mine was a 6spd, your numbers seem a bit low for how many mods you have, the gears may be affecting the output tho.

SonnyWu

TransGo for sure. And while you at it put in the paddle shift kit too.