IPD sale XeMODeX - Experts in Volvo Electronics
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy anything with this and it helps MVS!

Recomended MBC for Volvo 850 Turbo

How to go faster, stop quicker, and turn harder. Chips, exhaust, larger turbos, bigger/slotted/drilled rotors, high performance brake pads, manual boost controllers, performance shocks/struts/springs, airbox mods and more! Also discussion on HID and Xenon lights, aftermarket foglights and other exterior lighting.
User avatar
matthew1
Site Admin
Posts: 10602
Joined: Sat Sep 14, 2002 11:03 am
Year and Model: 850 T5, 1997
Location: Denver, Colorado, US
Has thanked: 617 times
Been thanked: 260 times
United States of America
matthew1

Re: Recomended MBC for Volvo 850 Turbo

Post by matthew1 » Fri Oct 12, 2012 1:37 pm

Yes, absolutely. But MBCs can also control it. The game is won or lost in controlling not just max boost, but boost-at-any-given-RPM. You don't want boost to come on too early. I'll try to note what PSI my 850 is at at say 2000 RPM, for reference.

Fast Fridays have lots of information about boost:

Fast Friday#12: Turbos and Exhaust
"... but first let’s understand why the larger turbos in the TD04 family can be prone to boost spike or rapid early RPM boost development."

Fast Friday #4: The Boost Variance Problem
"The BPS in these models is more for control of max boost target (I.E. over boost or spiking) rather than as a feedback..."

Fast Friday #3: Lucky talks Chip vs. MBC
"... If your intention is to use the MBC to control spikes then you have it setup correctly."

Lucky has forgotten more about this than I'll ever know, so take what I say with a grain of salt.
Help keep MVS on the web -> click sponsors' links here on MVS when you buy from them.
Also -> Amazon link
. Click that when you go to buy something on Amazon and MVS gets a kickback.

1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
2004 V70 R [gone]

Image

boosted5cyl
Posts: 1100
Joined: Fri Jan 29, 2010 12:52 pm
Year and Model: '98 V70 T5, '99 S80
Location: St. Paul, MN
Has thanked: 0
Been thanked: 0
boosted5cyl

Re: Recomended MBC for Volvo 850 Turbo

Post by boosted5cyl » Mon Nov 05, 2012 10:05 am

Any thoughts on an electronic boost controller? Boost gauge, boost controller and a new TCV to boot:
http://www.ebay.com/itm/2012-new-HDi-el ... 71&vxp=mtr
'04 XC90 2.5T AWD (Angus) 134K.
'99 S80 T6 (Medusa) 214k. On borrowed time LOL
'98 V70 T5 (Vivienne). RIP @ 228K. Spun rod bearings.

RobTarD
Posts: 53
Joined: Wed Aug 03, 2011 1:14 am
Year and Model: V70R, 1999
Location: Chicago
Has thanked: 0
Been thanked: 0
RobTarD

Re: Recomended MBC for Volvo 850 Turbo

Post by RobTarD » Mon Nov 05, 2012 2:28 pm

I'm considering one of these. You can find them on Amazon for less than $30 so I'll probably order from there.

These seem to work well (something as simple as an MBC should) from what I've seen on other forums.

http://www.zenboost.com/boost_controlle ... oo_IV_MBC/

http://www.amazon.com/s?ie=UTF8&page=1& ... odoo%20MBC

User avatar
matthew1
Site Admin
Posts: 10602
Joined: Sat Sep 14, 2002 11:03 am
Year and Model: 850 T5, 1997
Location: Denver, Colorado, US
Has thanked: 617 times
Been thanked: 260 times
United States of America
matthew1

Re: Recomended MBC for Volvo 850 Turbo

Post by matthew1 » Mon Nov 05, 2012 2:36 pm

I'm a big fan of MBCs. Watch that boost! :P
Help keep MVS on the web -> click sponsors' links here on MVS when you buy from them.
Also -> Amazon link
. Click that when you go to buy something on Amazon and MVS gets a kickback.

1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
2004 V70 R [gone]

Image

boosted5cyl
Posts: 1100
Joined: Fri Jan 29, 2010 12:52 pm
Year and Model: '98 V70 T5, '99 S80
Location: St. Paul, MN
Has thanked: 0
Been thanked: 0
boosted5cyl

Re: Recomended MBC for Volvo 850 Turbo

Post by boosted5cyl » Mon Nov 05, 2012 2:49 pm

matthew1 wrote: I do not get fuel cutoff until ~90mph / full throttle.
What initiates the fuel cutoff? ECU sees airflow outside normal range and cuts the juice?
'04 XC90 2.5T AWD (Angus) 134K.
'99 S80 T6 (Medusa) 214k. On borrowed time LOL
'98 V70 T5 (Vivienne). RIP @ 228K. Spun rod bearings.

User avatar
matthew1
Site Admin
Posts: 10602
Joined: Sat Sep 14, 2002 11:03 am
Year and Model: 850 T5, 1997
Location: Denver, Colorado, US
Has thanked: 617 times
Been thanked: 260 times
United States of America
matthew1

Re: Recomended MBC for Volvo 850 Turbo

Post by matthew1 » Mon Nov 05, 2012 5:01 pm

No idea, but that'd be my guess.

Jimmy? JDS60R?
Help keep MVS on the web -> click sponsors' links here on MVS when you buy from them.
Also -> Amazon link
. Click that when you go to buy something on Amazon and MVS gets a kickback.

1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
2004 V70 R [gone]

Image

User avatar
matthew1
Site Admin
Posts: 10602
Joined: Sat Sep 14, 2002 11:03 am
Year and Model: 850 T5, 1997
Location: Denver, Colorado, US
Has thanked: 617 times
Been thanked: 260 times
United States of America
matthew1

Re: Recomended MBC for Volvo 850 Turbo

Post by matthew1 » Mon Nov 05, 2012 8:24 pm

I should clarify my sentence from a couple months ago:

CORRECT:
I do not get fuel cutoff until ~90mph@full throttle.

Without the @ symbol it makes my sentence read like fuel cutoff happens at ~90mph OR full throttle, which is incorrect. It's [email protected]WOT.
Help keep MVS on the web -> click sponsors' links here on MVS when you buy from them.
Also -> Amazon link
. Click that when you go to buy something on Amazon and MVS gets a kickback.

1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
2004 V70 R [gone]

Image

jimmy57
Posts: 6616
Joined: Fri Nov 12, 2010 9:25 am
Year and Model: 2004 V70R GT, et al
Location: Ponder Texas
Has thanked: 4 times
Been thanked: 258 times
jimmy57

Re: Recomended MBC for Volvo 850 Turbo

Post by jimmy57 » Mon Nov 05, 2012 11:15 pm

Mot 4.3 and 4.4 use MAF vs RPM and a factor to decide when to shut down for inferred overboost.
I'm not sure if that is an answer you're looking for as there isn't a road speed shut down on the 97 until 155mph.
If you are over boosting then 90 MPH may be where you get enough load to have an overboost where the air consumption goes off the allowed map.

BTW, you'll go off the map more readily at lower altitude and in colder air temps. THe MAF signal goes higher with denser air.

97_boostedgLt
Posts: 6
Joined: Sun Dec 15, 2013 1:28 pm
Year and Model: 850 Glt 1997
Location: PA
Has thanked: 0
Been thanked: 0
97_boostedgLt

Re: Recomended MBC for Volvo 850 Turbo

Post by 97_boostedgLt » Mon Mar 24, 2014 8:44 am

Look at Turbosmart "T" MBC (89.95) wanna spend the momey on a MBC if u cant afford a EBC. That said, running the T MBC with ARD white tune, at 12lbs 253 HP, on my 1997 Volvo 850 GLT, Absolutley STOUT and made the car a whole new animal.been about a month and no spike in boost, doesnt boost to high in low rpms. All u need is a proper tune and a MBC is the quickest and easiest way to up your HP, Tq, etc.
hope this helps!

epukerob
Posts: 29
Joined: Sun Apr 07, 2013 1:49 pm
Year and Model: C70 1999, S80 2003
Location: California
Has thanked: 0
Been thanked: 0
United States of America
epukerob

Re: Recomended MBC for Volvo 850 Turbo

Post by epukerob » Tue Apr 29, 2014 12:05 pm

97_boostedgLt wrote:Look at Turbosmart "T" MBC (89.95) wanna spend the momey on a MBC if u cant afford a EBC. That said, running the T MBC with ARD white tune, at 12lbs 253 HP, on my 1997 Volvo 850 GLT, Absolutley STOUT and made the car a whole new animal.been about a month and no spike in boost, doesnt boost to high in low rpms. All u need is a proper tune and a MBC is the quickest and easiest way to up your HP, Tq, etc.
hope this helps!
"...doesnt boost to high in low rpms." Do you mean low GEARS? And if so, how is the MBC "bypassed" in the low gears??

Post Reply
  • Similar Topics
    Replies
    Views
    Last post