I'm looking to add a APS turbo kit to my 2003 Z with the 5 speed auto. I've been told by APS that I should upgrade my valvebody. The only two companies that I know of that offer upgraded valvebodies are Stillen and Level 10. Level 10 suggested that I upgrade my torque converter as well. I've heard that Level 10 has had some issues in the past...anybody have any recent dealings with them. Has anyone else done these upgrades? How does the car shift? Does the firmness of the shift correspond with the throttle position?

Thanks in advance.

John

 

I have the same questions and issues now that I have Vortech SC.

 

I sent my torque converter to Edgeracingconverters.com .Good guys....3 day turn around . Infiniti has an upgrade for the 03 AT5 that most dealers dont even know about .The 2 of them together , the car sifts better and launches hard

 

I've heard that its generally wise to get your torque converter and valve body upgrade done by the same company, or otherwise ensure that they are "compatible." Anyone know what specificallly needs to be "compatible" between the two?

 

just had my TC mod done by edge. very good group of people. answered all my questions and then some.

huge difference in shifting lag and the cars reaction time to the gas pedal being pushed.

 

Just an FYI but Stillen gets their VB's from Level 10.. We may be doin a group buuy soon. Please email my partner Mike for more info..
@
mike@racemrc.com

 

I'm in on the group buy for sure!

 

I might be in depending on price!

 

Are you sure about this? In this thread Stillen denied their VB was made by Level 10:

 

I remember that thread too...

 

The Stillen valve body is NOT made by level 10.
Stillen actually bores out the passages bigger than level 10.
More noticable difference.

 

To those of you who have the Edge TC, what stall speed did you go with and are you happy with the stall you picked?

 

How much firmer is the shifting with the valvebody upgrade? Is't so firm that my drink is going to fly out of my hand everytime the car shifts? Does it still shift smoothly when your not on the throttle very hard?

Thanks,

John

 

in the other thread it was also said that the valvebody and converter would have to be compatible..what exactly does this mean by compatible

 

I told him I wanted it to launch and still be streetable . He said it would end up about 400 more rpm that stock...what ever that is.....Im happy with it , but could have gone a little more aggressive with it

 

I am looking into this as well. Would you suggest I ask for a 500 rpm increase?

 

You should just talk to Aundre [spelling] at Edge . He will know or suggest what you need or want .