Issue with new MBC

[Davezj]

if you do that then there is no form of knock protection, as i believe it is only the standard boost solenoid that backs the boost pressure off when knock is detected.

[wintertidenz]

Ohh, right - think I will leave things how they are currently set up then

[Davezj]

when knock is detected the ECU alters the timing and octane rating, if it gets really bad the ECU reduces available boost, by not bleeding any of the pressure off.

so the standard boost valve does a good job.

well that is how i see it but if any one else has any other views i would be happy to be corrected.

[apeman69]

Yeah, leave the vent to atmosphere nipple uncovered to do it's thing. Don't mount the adjuster in a position where the VTA can be covered either e.g. under the bonnet where closing the bonnet could squash it. Sounds stupid I know but mine was close to this scenario when I first put it on.

[apeman69]

i have the same one and all the adjustment from standard to 1 bar happens ovr the crest of 1 click its a bloody nightmare

There must be something wrong with yours somewhere if it's the same cheapo e-bay unit. I'd have a good look to see if anything is obstructing the t-piece (within the t-piece). Mine was stuck up with the nice purpley-red paint present on the outside of it!

[VR4WGN]

i reckon someone should do a sTICKY for the FAQ about installing a MBC,with pictures and possible multiple pics of different styles of MBC's maby??

[wintertidenz]

I think that's a good idea, as there is only an article for the EBC setup - since I actually had mine set up properly when the pics were taken anyone who wants to do an article can use them

If no one wants to do an article, I'll do it though

[wintertidenz]

Article is up in member's section:

http://www.clubvr4.com/forum/showthread.php?p=487660

I only have pics of my MBC though, if someone else has pics and instructions for installing another type of MBC can you attach them to the thread - thanks

[tonka]

what sort of boost level should you be aiming for
as i have just got an mbc through the post today
just waiting for someother bits n bobs befor fitting

thanks tonka

[andydckent]

Somewhere between 0.8 and 0.9 bar before you start to get boost cut.

[GalantOnly]

I have this turbosmart on 3 of my VR4's... One with bypassed solenoid and two directly on the intake elbow...

All of them boosting 0.9-1.0 bar with MBC fully closed
Can't adjust anything, because as soon as I open them a bit it will boost 1.2 right away

I guess some of them is just not as high quality as we're expect to get for £10...

[Subaru ETA]

I have this turbosmart on 3 of my VR4's... One with bypassed solenoid and two directly on the intake elbow...

All of them boosting 0.9-1.0 bar with MBC fully closed
Can't adjust anything, because as soon as I open them a bit it will boost 1.2 right away

I guess some of them is just not as high quality as we're expect to get for £10...

is it a genuine turbosmart or a knock off?

[GalantOnly]

is it a genuine turbosmart or a knock off?

Honestly... I'm not quite sure... Seller sold them as Turbosmart, but it only says "Boost Controller" on the sticker - so I guess not

[Ryan]

I doubt it's a TurboSmart as they are quite a popular brand - I have their "Boost Tee" product and it is quite clearly marked "TurboSmart"

[wintertidenz]

It's probably a generic one made by a factory in China.

As mentioned earlier in this thread, pull the MBC tee-join apart and check if there is any paint or metal shavings obstructing it - the ball and spring may be getting jammed?

[Subaru ETA]

Honestly... I'm not quite sure... Seller sold them as Turbosmart, but it only says "Boost Controller" on the sticker - so I guess not

yeah that isnt a turbosmart item. the genuine ones go for $130nz for a basic one new and as said, have turbosmart clearly labeled on them