So I searched through the forum to see if some one had Spike # of boost and What it should hold at in WOT. I just put AchTTungs APR 93/100 chip in my car, Program 1 (93) is what it's set to. Bombing through the gears it spikes to almost 19-20lbs then drops to 15lbs, But, Dwindles down the higher my rpms go. Example. 4th gear, Right at 2,500 rpm WOT, 19psi spike, slow descent to 15, holds at 15psi (at about 4/5K rpm's) by the time I hit ~6k needles on 11psi Ish. Those of you w/ APR 93 please give me some feedback on if this is normal or even what the Spike/Constant #'s should be. If I score some more time tonight i'll throw my TurboXs mbc on once I found out what it should spike to/hold at.
I checked the pipes for leaks/clamps/frays anything. I see nothing at all.

 

that is right.

 

Why spike so low on a 93 tune? I'm spiking 22ish and holding 18 on a 91 tune. Ofcourse, I'm APR, maybe that's the diff.?

 

I'm now APR as well. Maybe theirs a difference between the 225 and 180?

 

Sounds similar to mine w/o MBC. Think you're good.

 

Again, yes, you are correct.

 

Oops missed that detail![>:]

 

Hmm Interesting. I thought it woulda spiked to ~20 then held at 15 all the way until my foot left the gas pedal. Why does it dwindle down the #'s the higher in RPM's you go?

 

Small turbine, less flow capabilites.It just cant sustain the flow need to hold boost that high in the rpm band. A ko4-20 has a slightly larger turbine wheel so it can hold more boost longer and at readline.

 

Good to hear its at least compatible with your car. Boost fell off a bit with me too, i can't remember it being that much though, and I know I had a boost leak that opened up under pressure.