Darin's 80q…Alive...

[Mcstiff]

It makes sense to me, pressure differential allows the valve to open via greater pressure in the lower chamber than the spring.

[loxxrider]

It really should work either way... in the bottom-port-only case, you limit boost by adding pressure to the bottom chamber. In the top+bottom port case with valve in the top port, you limit boost by limiting pressure to the top port. The two methods just call for opposing boost controller operation/configuration (one has the valve limiting pressure/duty cycle to lower/raise boost, the other has it increasing pressure/duty cycle to limit/lower boost).

[85oceanic]

Just so I have this straight, if I am going to one a 'heavy duty' N75, then I need to hook it up the way Darin has it, or will 'in line' work ok?

[savagerocco]

There are several ways to skin a cat. You can control boost with lower chamber only, but that doesn't counter act the force pushing on the wastegate valve surface, so eventually exhaust back pressure will open. Putting pressure on the top chamber counter acts the exhaust pressure. So, if you want high boost, the upper chamber really needs to see a boost reference. The style of waste gate solenoid also has a bearing on operation. Most valves will be normally closed and provide boost reference to the lower chamber even if no signal is given, this is for default spring control. Others are normally open and would go full boost with out a signal on the lower chamber, but wastegate spring control when not getting a signal when hooked up to the upper chamber.

[death 4kqt]

i use a stock audi gate, a 2.2 bar spring and bleed off the pressure from the bottom port. No line to the top port.

[savagerocco]

By the way Darin, glad to see that it is working. You outta drive it up here to drop off the loaner tools or drop them in the mail for me. Glad the car is driving well and better off, shifting like butter..

[Audilard]

Brent - the inspection is due in September. I need to drive up next week to do that, thread the shift rod for the S4 shift knob, return your tools, repair a torn CV boot, look into having only one key to turn the car on AND lock the doors and figure out wiring for the 2 plug transmission connector (I believe that is for the reverse lights).

Let me know what day is best.

Thanks,

[nsimps]

8 pounds at birth! Congrats!

[Hank]

clever nick!! well done!

[savagerocco]

The two pin plug is reverse lights, cv boot is doable, threading shifter, also no problem, and the IM should be ok. The laws have changed since last year, much more strict and the emission department has a webcam that they use during the test but I am sure we can get thru.

[death 4kqt]

The laws have changed since last year, much more strict and the emission department has a webcam that they use during the test but I am sure we can get thru.

feck....big brother much. that sucks.

[nsimps]

clever nick!! well done!

[nsimps]

death 4kqt wrote:[/quote]

The laws have changed since last year, much more strict and the emission department has a webcam that they use during the test but I am sure we can get thru.

feck....big brother much. that sucks.[/quote]


Sheeeease. Left Utah just in time!! oh wait, my URQ and truck are still registered up there...

[nsimps]

Just go up to St. George, no emissions (last I heard anyway)

[Audilard]

The two pin plug is reverse lights, cv boot is doable, threading shifter, also no problem, and the IM should be ok. The laws have changed since last year, much more strict and the emission department has a webcam that they use during the test but I am sure we can get thru.

Well, I believe I still have the file that passed the last time so we'll get it good and warm and give it a whirl.

[savagerocco]

I'm sure we can get it to go thru.

[Audilard]

Just out breaking in my car at 12 psi. Carry on.

[Hank]

lol

[85oceanic]

Just out breaking in my car at 12 psi. Carry on.

LIKE

[nsimps]

Just out breaking in my car at 12 psi. Carry on.

At this growth rate you'll be at 30lbs in no time!

You planning on WOW next month?

[PRA4WX]

You planning on WOW next month?

"World of Warcraft?!"

[Audilard]

Hit 15psi on my way in to work this morning. I should be driving the car this entire week to work, putting miles on it before next Wednesday, September 12th. Wide Open Wednesday!!

[Hank]

Halfway there!!

[Audilard]

So when I originally bought the car it came tuned at 20 psi. For the most part I ran it at 18-19. So on the way home from work it returned to 20psi and I had forgotten how fast this car is! Pulls like a freight train and sounds tremendous! That's it for now until I get on the dyno and get a proper 25psi tune on it. Wide Open Wednesday next week and I'm sure I'll have the video camera mounted!

[Hank]

LOL. 5 weeks till be put it on the dyno!