MBC install [Merged 10-7]

[b00sted99-X]

HERE, DAMMIT!

http://www.dsmtuners.com/forums/showthread.php?t=237982


ok n00b question here.. i got my MBC all hooked up fine (dejon tool.. sweet!) i'm just wondering what to do with the stock boost solenoid hoses.. i took the top one completely off (this is the one that was going to my intake pipe.. then capped that nipple on the pipe) .. the one on the bottom, that tees off and goes to both the wastegate and the turbo housing, is still there. i just bent it backwards and stuck it in the bracket that the top hose was at.. its still connected to the solenoid though. is this alright? can i leave it on there like that will it screw anything up?

 

[eboy0]

Well I know I have boost leaks... somewhere though I can't find them... possibly bad turbo seals. The bov goes off fine when I'm under full boost(12psi), with without the single spring mod. It's just how the item is described, I get the turkey flutter at like 1-2 psi when i'm barely on the gas.

 

[Slow 95 TSI]

Mine makes the turkey flutter too. it never did it til I installed the type-s. I think I need to adjust the bov. Right now I run 16-18 psi on the street.

Anyone have a link on how to tune a BOV?

 

[Xeiros]

Mine makes the turkey flutter too. it never did it til I installed the type-s. I think I need to adjust the bov. Right now I run 16-18 psi on the street.

Anyone have a link on how to tune a BOV?

I'm not sure there is any way to "tune" a BOV. If you're getting a flutter, that means your spring is either not tight enough, or it's too tight, which is causing compressor surge. I had this flutter too, and I tightened up my adjusting screw by hand untill I couldn't tighten it anymore, and it went away.

 

[eboy0]

I found this guide useful.
http://herpetology.com/dsm/bov.html

 

[Rice Over Wheat]

What the hell...that first pic looks like they are tapping the stock boost solenoid nipple on an aftermarket intake pipe.

 

[Slow 95 TSI]

I'm not sure there is any way to "tune" a BOV. If you're getting a flutter, that means your spring is either not tight enough, or it's too tight, which is causing compressor surge. I had this flutter too, and I tightened up my adjusting screw by hand untill I couldn't tighten it anymore, and it went away.

Thanks, I'll try it that way and see what happens

 

[DSM4me44]

If your only gettin turkey flutter under like 1 or 2 psi, id say your ok. I get flutter up until 5 or 6 because i tightened it up so i don't have a premature opening of the bov on the highway anymore.

 

[eboy0]

If your only gettin turkey flutter under like 1 or 2 psi, id say your ok. I get flutter up until 5 or 6 because i tightened it up so i don't have a premature opening of the bov on the highway anymore.

But when the bottom nipple is connected to a vac line, the flutter is gone.

 

[95CarbonEclipse]

Where exactly did you route the lower nipple to? The compressor housing nipple on the turbo? If so, did you just 'T' into the vacuum hose that runs from your compressor housing nipple to your MBC?

Lastly, is it important that you keep the BCS plugged in?

 

[eboy0]

Yup, I got mine setup like so, thanks to picture 2, I finally got my MBC working and was currently tuning my BOV today still needs some tweaking. I have it setup like so.
Compressor nipple>T split from there I have one end running to 2nd BOV nipple and other end running to MBC. Not sure if this does anything bad, but It seems to be working?

Disconnecting the BCS will result in a CEL, you can diconnect the vacuum lines, but leave the harness plugged in.

 

[95CarbonEclipse]

Disconnecting the BCS will result in a CEL, you can diconnect the vacuum lines, but leave the harness plugged in.

WTF, my "check engine" system must not be working. I've been running around for about a week now with my new MBC installed and i completed deleted the BCS. No CEL. On a side note, i've cut the CAT; no CEL; SeaFoamed the intake; no CEL. WTF?!?!

Sorry for the ranting. BTW, I did just check the bulb to make sure it wasn't burnt earlier today. Oh well, I'm gonna 'T' into my MBC/Compressor housing vacuum hose tomorrow. THX!

 

[Rice Over Wheat]

You can remove the cat and not get a CEL. Try disconnecting your rear O2. You WILL get a CEL or something is wrong.

 

[DSMunknown]

Click here





I think someone should just make some sort of robotic AI and send them to people's homes, programmed to do the MBC install for them. That seems to be the easiest way there is.

 

[95CarbonEclipse]

Yup, I got mine setup like so, thanks to picture 2, I finally got my MBC working and was currently tuning my BOV today still needs some tweaking. I have it setup like so.
Compressor nipple>T split from there I have one end running to 2nd BOV nipple and other end running to MBC. Not sure if this does anything bad, but It seems to be working?

Disconnecting the BCS will result in a CEL, you can diconnect the vacuum lines, but leave the harness plugged in.

I just finished hooking up the lower nipple on my type S BOV by 'T'ing into my MBC>Compressor Housing Nipple. While I was doing so, I noticed that when i tore my plumbing apart last weekend when i cleaned my SMIC, that i forgot to tighten up the hose clamp around my BOV (that explains the shitty performance since then).

Anyway, before i used to have a boost spike to about 15psi and would settle down around 11-12. Now, it's spiking to around 18 or so. Are you having boost spike problems?

 

[dadavemyster]

I have a question. How exactly do u wire the vacume hoses off the boost control solenoid? Do you just disconnect them and leave the wiring harness plugged in? or should they still run to the turbo somehow?

 

[just2asian]

I have a question. How exactly do u wire the vacume hoses off the boost control solenoid? Do you just disconnect them and leave the wiring harness plugged in? or should they still run to the turbo somehow?

If your going to run a mbc disconnect the lines goin to the stock boost solenoid, but leave it plugged in and just route the lines according to the instructions above.

 

[dadavemyster]

Oh ok thanks, so the boost control solenoid is completely useless after the mbc except to hold the check engine code?

 

[95CarbonEclipse]

Correct... i still haven't re-connected my wastegate solonoid and my car is running fine. For some reason though, i'm not getting a CEL, but it sounds like it would normally throw one if it isn't connected.

 

[eboy0]

My bcs got ripped off a while ago, long story, but its been like a month now and still no CEL.

 

[mattspyder]

what if you J pipe on your turbo doesnt have a nipple, like on my t04bvtrim. I understand to hook it up to the wastegate but then where else?

 

[RedTurboEclipse]

Some people drill a hole in their lower ic pipe, tap it, get the fitting, cover it with teflon tape, and there ya go.

Some people have a fitting on their compressor housing.

 

[oldman]

what if you J pipe on your turbo doesnt have a nipple, like on my t04bvtrim. I understand to hook it up to the wastegate but then where else?

Tap a fitting on the compressor housing like this.

 

[mattspyder]

is there any other where else to connect it beside drilling a hole.

 

[romeen]

Although a nipple on the compressor housing is best, drilling and tapping on the j-pipe or LICP will also work. The closer to the compressor the better.

http://www.dsmtuners.com/forums/showthread.php?t=255444




Damn Bruce, couldn't you have made the picture a little bigger for us old guys with failing eye sight.

 

[oldman]

Damn Bruce, couldn't you have made the picture a little bigger for us old guys with failing eye sight.

I would if I knew how.