2002ws-6

iTrader: (5)

Just wanted to know what brand off boost controller STS guys are using and where you are getting your signal from. I ran with just the spring and direct pressure off the turbo's outlet. Netted 4.5 psi and was fairly steady. I put a Turbo XS $75.00 special boost controller on and now hit 9.0 psi at just over 4000 rpm and it drops to just about 5 psi by 6000 rpm . I've got a buddy with a TT supra and he runs a Hallman RX boost controller. He says 18 psi steady all day long and at the track turns it up to 21 PSI, I was wondering why my TQ numbers where great and my HP so LOW, now I think I've got it figured out! with the help of 12secSS. I just want a nice steady 8psi without going to an EBC.

Blackbird

you need to take the signal after the fmic and you should be fine.

can't do it from the turbo.

2002ws-6

iTrader: (5)

FMIC = FRONT STS = REAR, I wouldn't want to run a rubber line the whole length of the car, if the line burst or tears the wastegate could slam shut overboosting. Maybe bend an Aluminum line?

1slow01Z71

iTrader: (36)

Still needs to be referenced after the FMIC, find a speciality brake line place that can make you whatever lengths you need and get to bending unless you just want to run some rubber line thewhole way.

ZL1Killa

iTrader: (17)

well, they run the oil lines all the way to the front of the car... why the hell not run the boost reference up there.... LMAO.

Blackbird

yes I understand the concept, I have owned a kit for over 2 years.

why be afraid of running the line? tie it up and it will be fine. mine has been that way for 2 years, no issues.

if you want it to work right you need to run the reference from up front.

simple as that.

2002ws-6

iTrader: (5)

I'm not running any lines to the front, I made an STS type turbo. Self contained oiling system. I didn't want to accidently cut an oil line and destroy my motor

2002ws-6

iTrader: (5)

So you think I should run an aluminum line, What Diameter 25 ft rolls comes in 1/4 5/16 3/8. I'm thinking 1/4 should be fine.

navymitch12

iTrader: (1)

yea they are all right your gonna need to run it up to the front....mine is ran all the way up, get some nice rubber hose and run it up there keep it away from heat and zip-tied up and you will be fine. 8psi is not gonna bust a rubber vac line.

Slowhawk

iTrader: (12)

We run metal brake line on all the kit's.No problems.

2002ws-6

iTrader: (5)

so run it after the intercooler but before the throttlebody?

navymitch12

iTrader: (1)

mine is after the throttle body and working fine

HydroStream6

iTrader: (16)

I run between 10 and 14psi on my STS car with the boost reference from the compressor housing... solid boost, no spike, no creep, nothing.... I don't understand why everyone says you have to reference from the manifold.

Blackbird

because the reference point at the turbo knows nothing about the pressure drop accross the IC.

so how could it possibly do what it needs to do.

HydroStream6

iTrader: (16)

It doesn't make a difference. All a boost controller is, is a ball and spring. It doesn't know what PSI it's seeing, it just knows if you want more pressure or less.

If you have 20psi at the compressor and only 10 in the intake, why does it matter? If you want more in the intake simply adjust the controller.

2002ws-6

iTrader: (5)

thanks hydrosteam, Thats the same thing I thought. Pressure drop across the intercooler is constant. Or so close that it doesn't make a difference. When I was running just a spring with no boost controller, boost was constant. I'm gonna try my buddies Hallman RX controller first. If pressure holds constant then I'll be done If not I'll run a hard line from the motor back

HydroStream6

iTrader: (16)

Two things I would try before you give up on your MBC.

1. Take yours apart and clean it.. sometimes oil or whatever can stick inside.

2. Put a restrictor inline. Go to Advance Auto Parts or whatever is near you and go to the vacuum tee section. They make a reducer where you can cut off the end to make it whatever size you want. Put that in there as it will restrict some of the air. Keep in mind your MBC will have to be adjusted with the restrictor inline.

Blackbird

guys, go do a search, this has come up many many times before this.

take the signal after the FMIC and the problem will go away.

HydroStream6

iTrader: (16)

And do you know why it will go away? Or just that it will because you've read it on here?

Putting it after the IC would be about the same as putting a restrictor inline. My bet is this: the MBC can't handle the amount of air going through it being referenced from the compressor. Therefore if you move the reference to after the IC where there is less pressure, the MBC can handle it. Therefore if you just put a restrictor inline to the MBC while still using the compressor as the reference if would work the same... as well as save you about an hour of running a tubing the whole length of the car.

Blackbird

Yes I do.

I own a STS with a FMIC and I have been involved with a number of other STS builds.

You guys do what you want.