Put in Greddy Type S, hallman mbc, and boost gauge..need help

[19GS-t97]

Ok, the car was running just fine, idle was normal. I took put on the bov, mbc, and guage. Start the car up and i notice that the guage shows 21-23 in Hg. Im pretty sure they're suppose to read approx 19. I let the car warm up and the idle went down to normal. I back the car up and when i pressed the clutch the idle jumped up to 1500. So then im driving the car around nice and easy and everytime i come to a stop the idle surges up then once its stopped for a second it goes to normal, which it has never done before. Ok now on to the boost. I wind it up and hit fuel cut in fourth. So i take another look at the gauge when i get on it and i notice the boost just flys past 16 and went to around 20 and i let off. I did not adjust the mbc at all or the bov. The mbc is hooked up correctly, i have one line going to the intake and the other to the wastegate actuator. Should i just start closing the mbc and see if that does it? Anything else to check out while im working on it?

Thanks

 

[CanadianTSi]

You need a line coming from a pressure source going to the MBC, the Intake is not a pressure source. You can tee into the BOV line to get a pressure source.

Without a pressure source the wastegate won't open, hence sky high boost.

 

[19GS-t97]

Thanks a million, don't know why i thought it was..i'll tee if off tomorrow morning then

Thanks again

 

[dalatinromeo]

The mbc is hooked up correctly, i have one line going to the intake and the other to the wastegate actuator.
Thanks

No, your mbc is not hooked up correctly. The line you have going to the intake needs to be tee off to the line from the bov to the intake mani.

Heres a tech article how to install the hallman mbc. It has pictures; so you can see what I was talking about, if you didn't understand. http://www.belitski.com/cars/talonmods/turbo/vfaqhallman.html

 

[oldman]

I strongly suggest taking the pressure source from the compressor/j-pipe instead of the BOV line for both proper functioning of the BOV and accurate boost control. Is the BOV recirculated?

 

[19GS-t97]

Ok another question...As i was hooking up my autometer c2 boost gauge, the light it not attached to the gauge. Is that like an extra light or something?? Its just the light with a white and black wire coming off of it, and it says to like screw it in, in the directions but thers nothing to screw it into

 

[19GS-t97]

Yes the BOV is recirc'd...what line are you talking about off of the j-pipe?

 

[oldman]

Yes the BOV is recirc'd...what line are you talking about off of the j-pipe?

Which turbo do you have?

 

[19GS-t97]

Evo III 16g

 

[98eclipseRS]

Ok another question...As i was hooking up my autometer c2 boost gauge, the light it not attached to the gauge. Is that like an extra light or something?? Its just the light with a white and black wire coming off of it, and it says to like screw it in, in the directions but thers nothing to screw it into

fix the MBC and set it as low as possible and then go from there turning it very slowly. You will also need to adjust your bov the work properly for your setup. To do that you want to tighten it down a good bit and drive around blowing off. If it surges(sounds like a bunch of small bov discharges in a row) then you need to raise the adjusting screw. Keep doing this untill you get the regular psshhht sound then tighten down the locking nut to secure everything in place. As far as the boost gauge isn't the autometer c2 the led backlit one?? If so then you don't need the light bulb, do you mind taking a pic and posting it up for us to see? How many wires come out of the back of the gauge right now?

 

[98eclipseRS]

Evo III 16g

I take it your using an aftermarket jpipe then? If so you will need to tap in a presure fitting somewhere into your intercooler piping/jpipe that you can stick a barb fitting on. Then run a line(clamp it down with a zip tie or small worm clamp) from that barb fitting to the mbc and then to your wastegate.

 

[oldman]

Evo III 16g

Then tap it off the BOV line for now but if you experience and compressor surge or inconsistent boost levels, tap your J-pipe (turbo outlet pipe) or the compressor housing itself with a 1/8 npt to 1/4" fitting and get your pressure source from there instead. If it were me, I would do it anyway, especially if you have a TurboXS standard or any beeder type mbc.

 

[19GS-t97]

Ok the Autometer c2 is the back lit one...it has the light, and a black and white wire coming off of the light...

Yes im using an aftermarket j-pipe...so you're saying to tap into this i should drill? I honestly have no idea what a barb fitting is...


If anyone has aim my s/n is streetdreams529 if it'll make this easier

Thanks

 

[98eclipseRS]

Ok the Autometer c2 is the back lit one...it has the light, and a black and white wire coming off of the light...

Yes im using an aftermarket j-pipe...so you're saying to tap into this i should drill? I honestly have no idea what a barb fitting is...


If anyone has aim my s/n is streetdreams529 if it'll make this easier

Thanks

Well let's do this one at a time, the gauge does not have a hole for the lightbulb correct?? if it does put in the bult, run one wire to power and one to ground. If not how many wires are comming out of the gauge right now. If it is backlit then there should be two wires comming directly out of the gauge already.

As for the jpipe yes you would want to drill into your jpipe with a drill(off the car of course). Your going to want to find the right size fiting to attach your vacum line to(home depot for this one) then select a bit that allows you to screw the fiting into the jpipe. Then make sure you wrap the threads of the fiting with teflon tape screw it into the jpipe and run your lines. This is the way I would do it and it is really recomended this way so that you have a non interupted source for boost to control your wastegate.

If this seems to advanced to do or you don't have the means to do it at the moment you can tap your bov line with a plastic T fitting and run the wire to your MBC from that.

 

[oldman]

Yes im using an aftermarket j-pipe...so you're saying to tap into this i should drill? I honestly have no idea what a barb fitting is...

It's very easy. You'll need a 1/8 npt to 1/4" barb fitting, 1/8 npt tap and 11/32" drill. Here's a picture my TO4S cover drilled and tapped.

 

[19GS-t97]

Alright so i'll just tap the bov line for now...

The gauge has no wires coming from it, there are two metal pieces sticking out of it with a light bulb pic in the middle of the two pieces that is on the gauge. Then there are the two long bronze screws on the outer part of the gauge...its hooked up in the car now so i cant take it out...

 

[Nanan]

Evo III 16g

The evo3 is prone to creeping in the high rpm range anyway so it hitting 20+ psi isnt a total suprise. This matter is not because of your mbc/bov/boostgauge, you need to port the hell out of the wastegate inlet on the turbo and O2 housing.

My setup holds 16psi up to about 6k rpm then it starts to creep to 20psi then fuelcuts. I have ported the exhaust side of the turbo but it seems that even that isnt enough on the stock 2g O2 housing even if it is ported.

The idle surge and iregularity sounds like you have a boost leak.

Btw, did you just install the evo3? how did you keep it in check before?

 

[98eclipseRS]

The evo3 is prone to creeping in the high rpm range anyway so it hitting 20+ psi isnt a total suprise. This matter is not because of your mbc/bov/boostgauge, you need to port the hell out of the wastegate inlet on the turbo and O2 housing.

My setup holds 16psi up to about 6k rpm then it starts to creep to 20psi then fuelcuts. I have ported the exhaust side of the turbo but it seems that even that isnt enough on the stock 2g O2 housing even if it is ported.

The idle surge and iregularity sounds like you have a boost leak.

Btw, did you just install the evo3? how did you keep it in check before?

If you had read the post you would have realized he hooked up the mbc wrong and that's why he was getting boost spikes. He also said in his first sentance of his first post that his car used to be running fine before the install of the new parts.

 

[19GS-t97]

The turbo's been in for a while now, just the stock bcs was doin fine with it, never hit fuel cut at all and no cel's whatsoever

 

[19GS-t97]

Ok so with this c2 gauge, should i just run a power and ground to the metal things sticking out of it wit the bulb in the middle of them?

Thanks

 

[98eclipseRS]

Ok so with this c2 gauge, should i just run a power and ground to the metal things sticking out of it wit the bulb in the middle of them?

Thanks

please post a pic this doens't make any sense to me at all.

 

[oldman]

How was the bcs hooked up?

 

[19GS-t97]

ok well i cant get these damn pics to get small enough for this forum to accept them, i have them on my computer though which doesnt really help you guys out..


Oldman, the bcs was hooked up normally...never had any problems

 

[oldman]

Oldman, the bcs was hooked up normally...never had any problems

What I mean is if you lost the fitting on the T25 after the turbo swap and you have no fitting on the aftermarket j-pipe, where was the bcs connected to all this time?

 

[19GS-t97]

It was hooked up to the wastegate actuator, with the t25 one line went to the actuator and the other went to the compressor housing...since it was the same line coming from the bcs i just plugged the compressor line and ran it to the wastegate actuator on the 16g...


Ok so today i have everything hooked up correctly now...I found out that i had the mbc backwards this morning. So everything is hooked up correctly. Now I went out to test it out this morning and i unscrewed the mbc as much as possible and tightened the lock nut. It went to 19 pounds, then i unscrewed it a little more and It boosted to about 21 pounds . So, can i have the screw on the mbc too far out or something? Any help would be great guys

Thanks