I need some suggestions guys. Dyno dissapointment

[LulzZombie]

Hey guys,

I need some advice on my build... It's a S1 Rb25/s13 hybrid. After months and months of wiring harness problems, thanks to Suspicious Garage, I finally got most of the kinks worked out. Anyway, I went to have it tuned here in Phx to see what kind of numbers came up and we maxed out around 280 hp on a Mustang Dyno, which is very disappointing considering what I have done to the motor.

Stock Internals
Freddy Intake
Q45 Throttle Body
3 in FMIC
China Top Mount Mani
Big Holset WH1C
Jecs 650 cc Injectors
8 Bit Z32 ECU with Nistune (to control the VTC)
Knock-off 38 mm Wastegate
Knock-off RS BOV

The two biggest problems that I am trying to address right now are:
1. Boost Creep - Just to get my car to the tuner I had my boost turned down to about 8 psi. We left that alone while he adjusted other things in Nistune. Once we were able to wrap the motor up to about 6k the boost just wanted to take off went all the way up to 19 psi. Now I know the wastegate positing in the egay manifolds aren't exactly "favorable" but I was wondering if their is anything else I can do? I am running a screamer pipe setup. Now in theory if I ran the pipe back into the exhaust, wouldn't the natural vacuum in the exhaust pull those gases out faster? Also, with a turbo that large it wants to spool, the tuner didn't want to turn the boost up he though it would over-boost to like 30+. Now my question is if I turned it up slowly and watched what happens at high rpms do you think I would reach a balanced equilibrium or would it want to continue to creep?

2.No VCT - One of the things I noticed on the dyno after we did a couple of runs with the VCT turned off and on is that their was no difference in the results. No clicking of the solenoid...nothing. I know the VCT is based off the speed in the rb's. My speedo isn't working in my s13 but Nistune is reading a speed signal in the consult gauges and the red VCT flag is also coming on. I tested the wires on the backside of the plug and I am getting a hot and ground. I even hooked a jumper from the batt and grounded the other pin, still nothing. No clicking, no change in my idle. Is their any other test I can do to know for sure that my solenoid is dead? Is their any USDM Nissan's that use the same solenoid? Does a SR solenoid work?




The Wastegate
[url=http://www.flickr.com/photos/115987503@N07/12231381434/]
2013-04-01_19-20-07_673

The Dyno

20140130_213802

Dyno pull
https://www.dropbox.com/s/wfbh7xdffdo5g ... 121348.mp4

[boneout]

Well im not the master of rb but from what I know about turbos... im not seeing a a wide band in ur list of mods or a boost control. The booste controler might just control your rise in boost amd set it without a tuner. The wide band how ever is gonna give you an acurate view on ur fuel and emission so you know what your motors realy doin and so will your ecu. Plus your ecu might not be supporting the vct like you think it is, or want it too even with niztune, a stand alone ecu might just be worthe it to you if you want the vct to work. After you accuratly control your boost there will be some more power to come with a few mods.

[themadscientist]

What size exhaust housing you running. Unless it's broken, the wastegate should be able to keep your boost where you set it.

[RRRRB]

Your boost wont creep any more than it already has if you turn the boost up.. I would suggest a bigger wastegate. .
Im surprised your tuner doesnt know that.. may wanna find one more educated..how much timing is in it?

Vct is rpm dependent not speed

[LulzZombie]

O I did forget to mention that I do have an Aem wideband and a manual boost controller. The holset housing is 12cm2 stock housing with the wastegate flap welded shut. I'am hitting full boost about 3500.
The thing that's bothering me about the Vct solenoid is that even if I have the car idling and I use a battery jumper box and connect the 12v pin and the ground pin nothing happens. No change in idle no change in timing in nistune.

[LulzZombie]

Vct is rpm dependent not speed

Right. But I was under the impression that for the ecu to engage vct the single flows through the speedometer then back to the ecu then the ecu send a ground to the solenoid.
As far as the tuner it's like everything I have just herd about him via word of mouth. Not many people in Phoenix will tune with the Nistune software. Everyone wants me to run aem ems.

[Darius]

Vct is rpm dependent not speed

Right. But I was under the impression that for the ecu to engage vct the single flows through the speedometer then back to the ecu then the ecu send a ground to the solenoid.
As far as the tuner it's like everything I have just herd about him via word of mouth. Not many people in Phoenix will tune with the Nistune software. Everyone wants me to run aem ems.

You are correct. The VCT engagement also has some minimum speed criteria that are associated with it. It won't disengage just by revving the engine. BTW, it is not v-tech so it is engaged from 0-4700 rpm in stock form. Once you hit 4700 rpm, it disengages.

Your boost creep issue is likely due to poor manifold design and not as much due to the screamer pipe. Plumbing it back into the exhaust will help pull more gases out of the waste gate, but not enough to mitigate 11 psi of excess boost. I'd focus on making sure the boost controller is functioning properly.

[LulzZombie]

Thanks Darius. I'll take a look at the controller. I don't know how It could not be functioning properly it's a simple signal in signal out with a screw to increase decrease boost. Maybe I'll try and find a known functioning one and see if it changes anything.
I do have a log file and nistune bin if any of you guys wanna take a look at it and can give me some insight.

[gawdzilla]

it sort of looks like you have an ignition timing issue. that could also be adding to your boost creep. you may be running so retarded on timing that you're creating an afterburner effect on your turbine. Not bashing your tuner, but does he/she know what they are doing, or is nistune/RB pretty new to them?

[Yellow4g63]

Maybe the turbo needs more boost to really start working? Also don't focus on the hp # too much since every dyno is different. I'm sure if you took it to a dyno jet it would prob give a higher number... sometimes.

[LulzZombie]

Ok I've got a quick update
After I got work today and realized that my batt jump box was dead I decided to start checking voltage at the Vct plug. Turns out I am getting 3v on the hot side of the plug. Yet again another wiring problem! This is literally the 10th issue I have had with this harness. I don't know if suspicious garage is a sponsor on nico or not, but I know he is on zilvia and the guy's a hack. Hopefully fixing that voltage will fix other drivability issues that I did not mention above. I know that power wire is a chain with the Vct, o2, and aac valve.

Not bashing your tuner, but does he/she know what they are doing, or is nistune/RB pretty new to them?

Like I said I don't know the tuner personally . I've got a buddy at full race that recommend him. I know he tunes alot of Hondas but I am not sure if he's experienced with nistune. So by all means you're not bashing him. You are enlightening me. How can I find out if this is the case? This is the first car I have ever gotten tuned. Funny how many people will pretend to know what they are doing and take my money all the same.

[LulzZombie]

I'll take a screen shot of my nistune timing map when I get home and post it.