miatamike203

So i had the intercooler pipe off with the car idling and my AEM truboost gauge was reading -15 witch is normal. Once i put the intercooler pipe back on my gauge went to -9. So i was like WTF and took it back off and the gauge went back to -15. So i had a friend come over who knows about the microtech standalone i have and rotary's. He said the timing is spot on and my ecu looks like everything is right. Its funny when the car is idling you can hear the turbo and it sounds like it is trying to boost lol. The turbo that was on the car before was smaller and journal bearing but had the same size A/R housing i am running with the new HTA3582r turbo. So i guess this show how much better ball bearing turbos are vs journal bearing turbos.

hustler

iTrader: (6)

what?

miatamike203

Yeah hustler my turbo is boosting at IDLE!!!

falcon

iTrader: (13)

not possible.

you have a restriction in your piping or intercooler.

seriously... I can`t believe this is actually a thread.

low vaccum on rotaries also indicates low compression. have fun with that, if that`s the issue. there`s a reason I sold my FD.

miatamike203

Falcon we did a comp test cam back 90psi and 87psi. The only thing we where able to come up with is the .63AR 5 bolt back housing is too small. when the pipe is off its normal once i put it on back to -9. It drives fine and has lots of power boost comes on crazy fast.

YES I SAID 90PSI, is normal for rotary's.

miatamike203

Ill go take a video for you people be right back.

falcon

iTrader: (13)

90PSI is kind of low. All my REW`s were always in the 110-120PSI mark. I`ve been around rotaries for years, so I`m not talking out of my ***.

18psi

iTrader: (76)

if your blow off valve is open at idle it should be venting through it.
if its not you need to figure out why not

falcon

iTrader: (13)

Exaclty. This is not physically possible. Your throttle body is closed at idle so I am still not understanding how it is `boosting` at idle.

miatamike203

My bov is closed when idling.
Turns out one of my ITB's was very slightly loose once i tightened it up vac went back up to -15.

I do have a nice video i took after i fixed the itb that im uploading now tho.

falcon

iTrader: (13)

There you go. I figured that was the issue.

miatamike203

http://www.youtube.com/watch?v=BinKzndp378

18psi

iTrader: (76)

badass...can't wait for some WOT pulls

falcon

iTrader: (13)

At 00:08-00:10 seconds there is something sparking in your engine bay right below the turbo. Might want to look into that....

miatamike203

That would be the open wastegate LOL =]

Braineack

iTrader: (62)

-9psi = NEGATIVE PRESSURE.

Bryce

iTrader: (24)

Times 9000. The failure of this thread makes me Lol.

gaius49

So the OP has really found that manifold vacuum decreases when he hooks up his IC set up. In effect he has determined that there is a vac leak in the IC system.

miatamike203

One of my ITB's was loose but very little

Aricjm15

Its a spinning turbine, its going to move air as long as it is spinning.