Does it really matter if the test car is stock or not? As long as the comparison is done with only the TB being the difference then it's enough to make a judgement. This does look very promising though.

There was an article from 4 years plus ago about a bunch of different tuners modifying the 350z for Fuji Speedway (can't find the article right now) and one of them had the mines TB which is 2.5mm larger than stock. On the builder's blog they did do an isolated review of the TB and it did get some reasonable gains but not worth the price that mine's is asking for though.

http://www.ppi-mines.com/350Z.html

 

Wtf at core rates and prices. Im about to send them my tb for 1800$ lol

 

Thats ridiculous are stock TB really that much?

 

I have 2 I can sell them, I will even pay for shipping.


When I get bored or something I will pull my 75mm TB apart and grind down the throttle shaft.

 

Tuesday I will have a before and after on the installation. It won't be same day or back to back but it will be the same engine package with the only change being the 75mm throttle body. The airflow has increased so much that the car is currently running lean enough in the midrange to hesitate. I will try to have a SAE corrected chart with a/f data of before and after. The plenum is an APS tall boy with the neck ported to match the adapter(almost 73mm). Pictures are on my build thread.

 

For those who venture to make their own patch harness:

OEM 2003 TB connector:

W/R Pin 1 Throttle Position Sensor Power Supply
Y Pin 2 Throttle Position Sensor 2
SB Pin 3 Throttle Control Motor Close
G Pin 4 Throttle Position Sensor 1
L Pin 5 Throttle Position Sensor Ground
L/Y Pin 6 Throttle Control Motor Open

When looking into the connector with connector release tab at the top
3 2 1
6 5 4



Voltage Drop flying lead connector/TB pinout:
Pin 1 = red = signal 5v
Pin 2 = blue = signal 1
Pin 3 = orange = signal 2
Pin 4 = black = signal ground
Pin 5 = yellow = close output (more positive than pin6 closes the TB)
Pin 6 = green open output (more positive than pin5 opens the TB)

When looking into the connector with connector release tab at the top
1 2 3 4 5 6

If using the connector off the coil pack/cam pos sensor patch harness:
1 = yellow/red
2 = blue/red
3 = black/silver
4 = white/blue silver dots
5 = white/blue silver dots
6 = white/red

When looking into the connector with connector release tab at the top
1 2 3
4 5 6

Match cam pos/coil pack patch harness to VD.net Connector
1 yellow/red to red
2 blue/red to orange
3 black/silver to yellow
4 white/blue silver dots to blue
5 white/blue silver dots to black
6 white/red to Green



Final mating colors of OEM TB connector to VD.Net Connector
W/R Pin 1 to Pin 1 red
G Pin 4 to Pin 2 blue
Y Pin 2 to Pin 3 orange
L Pin 5 to Pin 4 black
L/Y Pin 6 to Pin 6 green
SB Pin 3 to Pin 5 yellow

 

Been reading the throttlebody / harness causing hanging idle does the rev hang in the video seem normal or ?

View My Video

 

Any 3rd party dyno's yet? I've read a couple reviews on this, but no one has provided a dyno that I know of yet.

 

A whole 5-6whp and 6 torques roughly. This is on a fully built motor with all supporting mods. Power drop off after peak is a function of intake manifold.

 

I can accept that. Thanks cocky

 

Thanks for the dyno and glad to see you back at it.

 

with smoothing at level 5, i imagine the gains are within the noise of the dyno's accuracy.


so essentially no gains

 

I installed mine. Took about 30 minutes or less to install.

NOW, I am having the idle issue. 1200 RPM idle. Been doing the pedal dance and all 3 procedures in the instructions with no luck. I gave up after a couple of hours. Nothing seems to work. Pissed.

Also, the revs hang a bit after I release the throttle for a couple of seconds. No procedure seems to fix it.

No SES lights though.

 

you have to do the TB relearn not the reset the ECU in that case.

 

1cockyz : was the car tuned for improved air flow or just switching the throttle body and dyno it? you have mentioned that AFR went significantly lean.

 

Car was tuned. Its worth a couple HP but not much. This car also has 3" ID maf, samco tube, 3.5" amsoil filter with bellmouth integrated.

 

Do you (or anyone) not have a before/after dyno with just the part in question being the only change (same day, same dyno, same session, installed on the dyno, no tune, no other mods etc)?

 

Rev-up or DE?

 

What you mean by this? Ie this stuff is hurting you? I was thinking of the TB and fabbing up a 4" intake.

 

I think the upper plenum sucks. So you can put whatever size throttle body you want on it and you will get small changes. It's awesome we have this upgrade available and its so easy to do but it doesn't fix what's right behind it. It seems the FWD vq manifolds are better than the upper plenum nissan put on their sports car. I've read about the maxima guys getting gains with a 4" intake but not Z cars. I would love to swap a Kinetix velocity manifold on this car with the throttle body in place but its out of my hands. Although the new owner of the engine is definitely very engaged about the car.