turbosmart mbc...need help

Q&A regarding engines, turbos, and intercoolers and power upgrades

turbosmart mbc...need help

Postby spoolin_gt » Thu Oct 07, 2004 3:12 pm

anyone installed this boost controller??i was hitting 6psi on first gear before i installed the mbc..and 9psi max..after i installed this boost controller in my car yesterday..i noticed that im way over boosting...i test drove the car after installing it...and on 2nd gear...i was at 15psi@3000rpm...and i hit 20psi@5000rpm...and hit the fuel cut...at idle..and revving it to 6000rpm..i would get 10psi...i checked all the hose and connections for cracks or splits..or for anything lose..but couldn't find nothing...i disconnected the turbo vsv...and it's still the same....what could be the problem here??could the mbc be defected??need help...i can't even enjoy my car right now..cuz everytime i try to gun it...all i get is fuel cut...
Members don't see the above ad. Register now - it's free!
spoolin_gt
Club Member
 
Posts: 99
Joined: Thu Oct 07, 2004 3:04 pm
Location: toronto

Postby alltracman78 » Thu Oct 07, 2004 4:23 pm

Have you tried adjusting it yet?
Image
User avatar
alltracman78
GTFour God
 
Posts: 4675
Joined: Mon Aug 09, 2004 9:04 am
Location: Ma

Postby spoolin_gt » Thu Oct 07, 2004 5:38 pm

yeah..i tried...played around with it...and boost is still high...im scared to floor it now...just the feeling of fuel cut is not nice...
spoolin_gt
Club Member
 
Posts: 99
Joined: Thu Oct 07, 2004 3:04 pm
Location: toronto

Postby busdriver » Thu Oct 07, 2004 5:44 pm

How did you hit 20 psi without hitting fuel cut?
Jake
90 st185
needs tlc
busdriver
Club Member
 
Posts: 206
Joined: Fri Aug 13, 2004 5:19 pm
Location: Bozeman MT

Postby alltracman78 » Thu Oct 07, 2004 5:46 pm

where do you have the vaccum hose connected to?
Image
User avatar
alltracman78
GTFour God
 
Posts: 4675
Joined: Mon Aug 09, 2004 9:04 am
Location: Ma

Postby spoolin_gt » Thu Oct 07, 2004 6:37 pm

turbo+mbc+wastegate actuator.....that's what it said on the diagram that the boost controller came with....

hitting 20psi w/o fuel cut???i seriously dont know...because i thought the the ct26 can only hold up to 15....but as soon as i hit 20....that's when i hit fuel cut...
spoolin_gt
Club Member
 
Posts: 99
Joined: Thu Oct 07, 2004 3:04 pm
Location: toronto

Postby busdriver » Thu Oct 07, 2004 6:48 pm

It might possibly be hooked up backwards? I would try reversing the lines, like taking the one you hooked up to the turbo and hooking it up to the WG actuator and vice versa. By the sounds of it it couldnt hurt.
Jake
90 st185
needs tlc
busdriver
Club Member
 
Posts: 206
Joined: Fri Aug 13, 2004 5:19 pm
Location: Bozeman MT

Postby spoolin_gt » Thu Oct 07, 2004 6:53 pm

umm..i dunno about that...there's an arrow on the mbc that tells you where to hook it up to...im pretty sure i did it right..unless they marked the arrow wrong.....
spoolin_gt
Club Member
 
Posts: 99
Joined: Thu Oct 07, 2004 3:04 pm
Location: toronto

Postby alltracman78 » Fri Oct 08, 2004 2:01 am

spoolin_gt wrote:turbo+mbc+wastegate actuator.....that's what it said on the diagram that the boost controller came with....

hitting 20psi w/o fuel cut???i seriously dont know...because i thought the the ct26 can only hold up to 15....but as soon as i hit 20....that's when i hit fuel cut...


Where is the end that isn't connected to the bc at?

If you're hitting 20 psi for a fuel cut, you either have a modded ecu, or a problem. Or a adjustable fcd.
Image
User avatar
alltracman78
GTFour God
 
Posts: 4675
Joined: Mon Aug 09, 2004 9:04 am
Location: Ma

Postby bboytou » Fri Oct 08, 2004 4:56 am

Yea! that sure is weird. I thought that the usdm st185 get boost cut at 12psi and the jdm rc model gets it at 18psi. Isn't that right you guys?
bboytou
Club Member
 
Posts: 21
Joined: Sat Aug 21, 2004 9:24 pm
Location: Sacramento, Ca

Postby GREAT_GTS » Fri Oct 08, 2004 10:53 am

I have the same MBC on mine. I' ve also notice much overboost since before. In cold winter days i've seen often a drop of 1.5 to 1.1 bar. Maybe there is a flow restriction to actuator and this cause so much overboost.
'90 Celica GTS with 2nd gen 3SGTE, FMIC, 3" Full Custom Exhaust, Intake cone filter, Turbosmart BOV and FCD,Full Carlos Sainz look.
Image
GREAT_GTS
Newbie
 
Posts: 11
Joined: Thu Sep 09, 2004 4:50 am
Location: GREECE

Postby spoolin_gt » Fri Oct 08, 2004 1:27 pm

alltracman78 wrote:
spoolin_gt wrote:turbo+mbc+wastegate actuator.....that's what it said on the diagram that the boost controller came with....

hitting 20psi w/o fuel cut???i seriously dont know...because i thought the the ct26 can only hold up to 15....but as soon as i hit 20....that's when i hit fuel cut...


Where is the end that isn't connected to the bc at?

If you're hitting 20 psi for a fuel cut, you either have a modded ecu, or a problem. Or a adjustable fcd.



what do you mean by the end that isn't connected to the bc???the boost controller is in between the turbo and the wastegate...and both ends are connected...
spoolin_gt
Club Member
 
Posts: 99
Joined: Thu Oct 07, 2004 3:04 pm
Location: toronto

Postby enzytebob » Fri Oct 08, 2004 1:41 pm

http://www.twosrus.com/new/Lower_Frames ... ctions.PDF

See if the link above w/ instructions will help. It's for an mbc install on a ct26.
enzytebob
Club Member
 
Posts: 173
Joined: Thu Sep 30, 2004 8:14 pm
Location: Mostly in the woods

Postby spoolin_gt » Fri Oct 08, 2004 2:00 pm

im not asking for instructions to install the bc...i installed it right....i just want to know if anyone else experienced this...as for now..i took it out....i dont wanna risk anything...boosting at 9 again.....great gts...how much boost were you putting out before the mbc??and after????thanks...
spoolin_gt
Club Member
 
Posts: 99
Joined: Thu Oct 07, 2004 3:04 pm
Location: toronto

Postby GREAT_GTS » Fri Oct 08, 2004 2:09 pm

spoolin_gt wrote:im not asking for instructions to install the bc...i installed it right....i just want to know if anyone else experienced this...as for now..i took it out....i dont wanna risk anything...boosting at 9 again.....great gts...how much boost were you putting out before the mbc??and after????thanks...

I was between 1.1 - 0.9 bar.....
'90 Celica GTS with 2nd gen 3SGTE, FMIC, 3" Full Custom Exhaust, Intake cone filter, Turbosmart BOV and FCD,Full Carlos Sainz look.
Image
GREAT_GTS
Newbie
 
Posts: 11
Joined: Thu Sep 09, 2004 4:50 am
Location: GREECE

Next

Return to Performance and Power

Who is online

Users browsing this forum: Bing [Bot] and 3 guests