Archived

This topic is now archived and is closed to further replies.

RZT5

Mbc In Parallel With Tcv

Recommended Posts

as much as I've bashed on MBC's I'm going to try using one in parallel with the TCV to control my boost spikes. I think I've narrowed it down to the Forge UNOS boost controller and the Turbosmart Boost Tee. Anyone have any experience with either or any reason to go with one over the other? Or any other MBC I should consider for that matter?

Share this post


Link to post
Share on other sites

Hallman Pro Ideally with In-cabin Control.

For manual cars I ditch the Bcs/Tcv and only use the Mbc, This requires a boost gauge and not being a complete idiot and flooring it in low rpms.

Flame all you want. I run a 19t and Mbc from Compressor to a Garrett 11 psi Wastegate. Never had a single boost spike :P

A top notch Mbc like Hallman Pro with ceramic ball will respond faster than any Greddy Profec Spec B Ebc. Less spikes too :o

And no electronics to fail

Share this post


Link to post
Share on other sites

Kinda like this?

http://forums.nasioc.com/forums/showthread.php?t=602674

Good way to go, gives you the good spike control and quick spool when WOT from the MBC, and good boost control with pedal movement from the EBC. :tup:

Share this post


Link to post
Share on other sites

Hallman Pro Ideally with In-cabin Control.

For manual cars I ditch the Bcs/Tcv and only use the Mbc, This requires a boost gauge and not being a complete idiot and flooring it in low rpms.

Flame all you want. I run a 19t and Mbc from Compressor to a Garrett 11 psi Wastegate. Never had a single boost spike :P

A top notch Mbc like Hallman Pro with ceramic ball will respond faster than any Greddy Profec Spec B Ebc. Less spikes too :o

And no electronics to fail

+1 to infinity

Share this post


Link to post
Share on other sites

Kinda like this?

http://forums.nasioc...ad.php?t=602674

Good way to go, gives you the good spike control and quick spool when WOT from the MBC, and good boost control with pedal movement from the EBC. :tup:

So to use this where do you plumb the MBC in relation to the TCV? I would think they would be run in series, TCV then MBC but that guy has them run in parallel. That would seem to bypass the TCV in favor of the MBC. Perhaps I don't understand how they work...

Ready to be schooled...

Share this post


Link to post
Share on other sites

Parallel allows the ecu to control the onset of boost, and the MBC is set to max boost, controlling spikes and quickly controlling heavy throttle foot.

Bypassing the TCV/BCS, I suspect you are limiting its ability to control fuel trim, timing, and other desirable attributes of a good tune. Parallel allows the TCV/ECU to do what you paid for it to do.

To me, an MBC is like a bandaid. But you guys are happy with it, and thats what a car hobby is all about.

I actually have an MBC on my R (Hallman), its not tuned and we are running a 19T and other air flow up grades, so I'm using it to keep my kid from wrecking shit.

If I recall member JAXX is a big proponent of parallel MBC.

Share this post


Link to post
Share on other sites

Parallel allows the TCV/ECU to do what you paid for it to do. To me, an MBC is like a bandaid.

I agree with this 100%, but a spike to 24 psi is very capable of bending a rod and my setup seems just too eager to do this. This is why I want one in parallel that just stays out of the picture unless I go over max boost.

Share this post


Link to post
Share on other sites

So run an MBC in parallel with the solenoid, it'll only crack open to limit boost when it reaches the preset pressure, and won't let it go higher.

Share this post


Link to post
Share on other sites

In theory it should work great....you won't have to worry about getting into boost too quickly because the TCV/BCS will work as normal until TOP boost pressure is hit then it should divert through the MBC and quell the spikes.

Share this post


Link to post
Share on other sites

In theory it should work great....you won't have to worry about getting into boost too quickly because the TCV/BCS will work as normal until TOP boost pressure is hit then it should divert through the MBC and quell the spikes.

Thats exactly what I'm thinking. Gonna go pick up an MBC today hopefully and try it out.

Share this post


Link to post
Share on other sites

Thats exactly what I'm thinking. Gonna go pick up an MBC today hopefully and try it out.

Please let me know the outcome!

Share this post


Link to post
Share on other sites

haha i posted this a while ago :) & your sketch looks just like mine :) thanks hommie now if only a MBC would fall outa the sky

Share this post


Link to post
Share on other sites

haha i posted this a while ago :) & your sketch looks just like mine :) thanks hommie now if only a MBC would fall outa the sky

I need one to appear in my hands as well! Trying to fix my exhaust right now so this will have to wait!

Share this post


Link to post
Share on other sites