LOL. Nah bro, I'll fix it for you.

The Plenum spacer is a cake walk, it's one of the easiest things you can do to your car for a mod.

Order the Oring for the Intank Pump from Nissan, it needs to be removed and should be replaced once tampered with. Some guys get fume smell in car down the road because they didn't do this.

 

Dont install that junk. Just go to cjm-motorsports.com and read the walbro install with swirl jet mod first. Put the 3.12 pulley on first (it is a pain to remove all the stuff to change the pulley afterwards).

Driving to a shop in vacuum will not be an issue. It will run rich with those new injectors and everything but it won't be that big of a deal. Actually you said the shop is installing the 440's so you will be perfectly fine on the stock injectors with walbro in tank. The only time the external fuel stuff from vortech even works is in boost so don't install it. Also since you wo'nt be in boost it won't matter what pulley you put on.

Just make sure you do the proper mods for the walbro in tank installation so it functions correctly. It's pretty simple.

SO: install s/c with 3.12, intank walbro, drive to tuner, have them install injectors and tune. easy

 

He can hook up the cog belt. It won't matter since he isn't driving in boost.

 

FIXED

http://www.cj-motorsports.com/



Good call. I guess i'm just a better safe than sorry kind of guy. I don't see a point in paying tuner prices to install injectors and a UIM spacer or any other basic stuff though, not that the OP is out here to save money

 

So you're saying don't install the SSB at all, and just buy an UpRev license and have the tuner flash my ECU?

Also, forgive the noob question, but if all pulley's are hooked up, how would I not be running in boost? I just set the Wastegate to vaccum or something??

 

On a vortech system you only go into boost when you WOT it and it closes your bpv. Otherwise your bpv is always open during cruising mode.

Why didn't you go with a tuner kit? You could have saved yourself some money since you are changing out your injectors and getting a walbro pump.

 

Yep in hindsight I should have :/ I figured the 3.12" upgrade was more of a drop in, but now I want to make sure that it has plenty of fuel and I'm not pushing the stock injectors too far.

 

SS box works good for that it is but if the shop is a reputable osiris tuner then it would be a lot easier install since you don't have to cut up the wiring harness like you would if you installed the SS box. So just less hassle for installation.

 

 

I meant slightly open never fully closed unless you wot. Correct me if im wrong.

 

Thats how the BPV works, once, vacuum is reduced by increased load, it shuts and you start to build boost.

You need quite a bit of load, either going up a hill or a lot of throttle to get to 0" Hg, so essentially WOT.

 

It shouldn't. If the BOV is open at idle, vacuum, etc, then it's mis-matched for the application, or improperly adjusted.

If it was a recirculating BOV then while not necessarily ideal, opening at idle and low load is no biggie, it can run like that, but the Vortech isn't recirculating.
If it's staying open at these times you're pulling unfiltered air into the engine, and don't have boost when the demand is there, this kills response time/acceleration, and obviously, we don't want unfiltered air in the engine, either.

There's a lot of misconception on BOV's. Basically this style is a Delta style. It's actuation (purge) point is dependant on Charge (intake) pipe Pressure vs. Manifold pressure. The mechanically fixed part is the spring, it does have a mechanical adjustment to get it into the proper spot when tuning. This is part of tuning the engine, if your BOV is opening under those situations, take it back to whomever tuned it.

As simple as I can put it, with pictures. Some copy/pasted from Research sources (not listed) :




The Spring:
The purpose of the spring in a BOV is to hold the BOV closed when your throttle plate is closed, IE during idle and deceleration conditions. Under these conditions, the pressure in your intake manifold is much lower than the pressure in your intake piping (Vacuum) so the BOV has a natural tendency to spring open. The Mechanical Spring tension is what stops this from happening.

Your goal is to get the BOV to stay CLOSED during high intake manifold vacuum/closed throttle plate conditions, using the very smallest amount of spring energy possible. Using less spring energy will allow the BOV to snap open as rapidly as possible when pressure release is necessary.

The Spring is the only part we can adjust here, either by replacing it with a higher/lower tension, shimming it with washers, etc, or adjusting it via the factory threaded portion (spring preload adjustment).

Pressure Delta (Differential):
The Vacuum line from your BOV goes to the Intake Manifold. Most times the intake manifold is under vacuum in the Vortech system. This applies Vacuum to the BOV 'top' port, which essentially 'pulls' on the actuator piston, trying to open the valve and release pressure. It's the Spring that stops this from happening.

When Actuator piston is open:



The Charge pipe Inlet on the BOV also pushes against the Actuator piston, trying to open the valve and release pressure.

The pressure on one side directly impacts the other side (hence "DELTA"). If pressure on the "top" (Intake Manifold) side increases, it's harder for the pressure on the Charge pipe inlet side to open the valve.

Invertedly, if the pressure on the "top" (Intake Manifold) side decreases (Vacuum), it's much easier for the pressure on the Charge pipe inlet side to open the valve.






Hope that helps clear some of this up. Let me know if something's unclear.

 

You really have no idea what you are talking about and obviously have never even seen a centrifugal supercharger setup in real life.

Vortech's dont use BOV's they use bypass valves. BPV's are open 100% of the time under vacuum. Read my post again to understand how a supercharger system works.

The supercharger is blowing out out of the BPV, so its absolutely stupid to say

 

 

^...X2

 

Clearly I'm confused, are you saying that this recirculates purged Charge pipe air back into the air filter fitting?



Where/how does it do that?

And it's not stupid to say that at all, if a BOV is open during vacuum that charge pipe will pull outside air in through the open vent, because the charge pipe is under vacuum also. perhaps I'm misunderstanding and that's not how this Vortech one works. No need to get snippy, explain, set me straight.

 

First off, it's a bypass valve, not a bov...this is a vortech supercharger, not a turbo kit...

And secondly, what str8dum and unvmyg35 said is correct about how it works....that's all there is too it...

 

Can the Walbro 255 in-line pump that came with the Vortech V3 kit use with 600cc injectors or I need to get Walbro 255 in-tank?
Thanks!

 

Wow I'm glad I posted that like an idiot, I really had no idea of the difference between the BOV and the BPV I just kind of assumed different names for the same thing.

Thanks for schooling me on this. So essentially the Charge air just goes through the valve, into the vacuum line and in before the SC inlet, is that correct?

Derp.

 

yes, but the vortech system uses a FMU that bumps up pressure and the second pump is turned on when the ss box tells it to. If you use something like osiris there is no trigger wire to turn the inline pump on. I personally do not like the vortech FMU setup. There are so many fuel line connections and things to go wrong. A simple in tank walbro will be far more reliable and easier to install. With stock block power a walbro with 600cc injectors will work fine. A simple return system is best but not necessary with the power from a stock block.