He said he doesn't mind doing either UTEC , Unichip, or Uprev, but he recommends the SS box, since it's cheaper and doesn't have any known issues working well with the Vortech. The main reason why I created this thread was to see if it is worth while to go against his recommendation, since I see many members not using the SS box. The only real hard fact I can see to not use the SS box is if you want to do water/meth injection, since it cannot control it. Is that right?

 

It's really personal preference...at least as I am familiar with it...

I was going to use the SS Box, but I didn't want the transitions between ECU and piggyback during boost, hence I went Uprev Osiris...

Is it a big deal when piggybacks transition during boost? Maybe not...is the limitations of the SS box in resolution going to hamper you car's performance? Maybe a good tuner can compensate for that...

If you trust your tuner, follow his advice...he'll be your resource for the duration of your boosted experience...if he turns out to be a bad tuner however, well, that's another story...

BTW...Water/Meth kits can be controlled by map/boost, too...

 

Their is NO Transition with the SS Box. (Don't have a clue what your talking about)
The Stock ECU is Always operating...........
The SS Box is Always Operating.............
Their is No transition between the Stock ECU and SS Box, It Simple does not work like that........ the SS Box NEVER takes Total Control of the Stock ECU.

However with every OBD II Late Model Vehicle there is transition between Closed Loop and Open Loop

The Resolution of the SS Box is perfectly fine for a Street Car.......

Most of the Tuners out there, never tune a car with that much Detail anyway.

There are some very very BAD so called Tuners out there, beware.

It's very easy to tune a car on the extreme safe side, and quite another thing to Tune a car for max performance and still be safe and stay together.

There are also some Very Good ones that actully know what their are doing and don't take advantage of you.

 

What's there to understand? When you're in vacumm...ecu controls...when in boost, piggy back takes over, I agree not total control, but there is a transition between ecu and piggy back, hence the name "piggyback.". However a good tune will render the transition seamlessly, as no doubt your tune is....

 

350z006, What does the SS Box do Electronically? And what do you do for a Living? If I may ask......

 

I can see where this is going and I'll discuss that with you via pm...

I stand by what I say about engine management vs tuner...so OP, follow your tuner if you trust him...

 

If IIRC,

The ECU is always in control. It always sends the signal to the injectors for fuel. The S.S. Box takes the MAF signal, alters it and sends the appropriate voltage to the ECU for fuel corresponding to the boost and rpm..The MAF voltage would max out at the high Air flow rates under boost..

The SS Box , under boost , sends the electrical signal to turn on the Vortech fuel pump and thru a vac port provides the 8:1 fuel necessary thru the FMU which feeds the Vortech fuel pump.

The cam sensor signals are also fed into the SS box for timing control.

 

so would it be ok to have the ss box and larger fuel pump / injectors and have it run safely. I'm talking about 550cc injectiors ,225 pump..

 

It's been a while since I went with the 255 but what I remember was that the fuel pressure increases to about 80 psi w/o boost...The 255 raised the static pressure...I eventually added a RFS (AAM Stage 0, eliminated the Vortex FMU/ Fuel pump) and the press is now about 52psi which is normal and raises with boost. As a minimum I would think a Tune of the S.S. box would be necessary with the 550c inj's..

 

good read here!!