Project: Mavro Gato - 99 Turbo'd 3L

[FastCougar]

Originally Posted by gamiller

Yes, it makes sense to move the source if the IACV becomes fatigued trying to stay closed under boost.

But I still maintain that the stock location of the IACV on the 3.0 UIM does not permit changing the air source.

hmmm ... been ages since I've seen one ... IIRC you are correct in that the tubing is cast solid and doesn't use a tube. Forgot about that

[gamiller]

No problem. I hope moving your IACV feed solves your issue. First time I've heard anyone report IACV failure, but that might also be due to the fact that you are running higher pressures than everyone but Joey.

EDIT: Say, have you moved your DPFE/EGR from the header to the down pipe? Guys at CEG are reporting that the DPFE cannot handle the pressure or the heat of the exhaust gas.

[FastCougar]

Once I solve the cooling issue (soon), she's going to hit the rollers again

[FastCougar]

Originally Posted by gamiller

EDIT: Say, have you moved your DPFE/EGR from the header to the down pipe? Guys at CEG are reporting that the DPFE cannot handle the pressure or the heat of the exhaust gas.

EGR is GONE and as such, the DPFE is simply "tubeless", but MUST remain connected to the engine harness or you get a CEL. The EGR blockoff plate is tapped as my boost signal source for my BOV and boost gauge/waste gate controller.

[FastCougar]

Originally Posted by DanG

The ADC kit had the IACV draw from before the compressor, after the MAF. So yes, based on that and your sound reasoning, I believe that is the way to go.

You sure about that???





What is that long hose going from the front of the W/A intercooler around to the IACV area? Is that water and it just looks to be plugged in the IACV, but instead is going behind it to the firewall heater hose connection???

[gamiller]

Oh Dan did that originally and then admitted it was not a good way to go.

EDIT: Okay, so I was remembering that he tried plumbing the PCV into the IACV and that did not yield a happy ending.

Originally Posted by DanG

Okay- As it turns out, the "mist" that I saw coming out of the back wasn't fuel. I had my father get behind me on a run- I punched it, and there was a puff of black, as you'd expect. But then when I got off the throttle, there was a cloud of blue. Yeah, blue. Oil.

So after he told me, I changed my underwear, and started thinking logically. There was no such behavior before I changed the housing. The turbo? Maybe the cartridge was leaking... But then I thought of something else- I piped the valve cover breathers back into the IACV hose to prevent me from venting crankcase to atmosphere. Um... Don't do that. We disconnected the breather feed hose from the IACV hose, plugged the resulting IACV hole, and did another run. No smoke.

Bottom line- Don't try to be "green" when running a monster like this. Any ideas as to what I should do with the breather hoses? Maybe plug into the oil/air separator at the PCV valve?

[FastCougar]

Originally Posted by gamiller

Oh Dan did that originally and then admitted it was not a good way to go. Let me see if I have a link to it.

Not a good idea to go "pre" or "post" turbo on the IACV feed?

[gamiller]

Of note, I did find a quote of Dan suggesting the IACV remain post turbo!

Originally Posted by DanG

I would do it after the turbo- You don't want the possibility of a boost bleed if the IACV isn't under pressure too.

But since he gave you different advice, perhaps he has changed his mind in light of his experience with the ADC kit. Dan?

[FastCougar]

Yes, that's the exact same thread I was reading before you replied: Did'ya ever have that "not fast enough" feeling? .82 A/R install... - his last comment on the last page.

[DanG]

Who knows. I can see it both ways now. Damn- The IACV hose is after the intercooler, as the pics showed- But I can see it from Trevor's POV too. I never had trouble with the IACV, though. Lucky?

Oh, what to do?!

BTW: POST #1000!!!