R-Spec MBC?

**AlanG** · Friday 11th September 2009, 21:35

Not sure buddy........0.9bar maybe,but I'm guessing. Someone will be along with an accurate figure.......

**badger1980** · Friday 11th September 2009, 22:52

Did u go for the r-spec one ? or another from flea bay

**p fandango** · Saturday 12th September 2009, 06:41

13psi is considered to be safe on a standard ECU

**Johnny5** · Saturday 12th September 2009, 07:05

Originally Posted by badger1980

Did u go for the r-spec one ? or another from flea bay

Went for the R-Spec.... Should be delivered today!

**Rnash2002** · Saturday 12th September 2009, 08:00

Originally Posted by Johnny5

Went for the R-Spec.... Should be delivered today!

Just make sure you set this in 4th or 5th gear if not the boost tends to ceep in high gears so you might hit the cut.

**Johnny5** · Saturday 12th September 2009, 18:08

Originally Posted by Rnash2002

Just make sure you set this in 4th or 5th gear if not the boost tends to ceep in high gears so you might hit the cut.

Its an auto so will have to do it above 60mph!

**AlanG** · Saturday 12th September 2009, 18:25

Did it turn up mate?

**AlanG** · Saturday 12th September 2009, 18:25

Originally Posted by p fandango

13psi is considered to be safe on a standard ECU

What's that in bar,Duane?

**Rnash2002** · Saturday 12th September 2009, 18:28

Originally Posted by AlanG

What's that in bar,Duane?

0.896317 lol

**Johnny5** · Saturday 12th September 2009, 18:35

Originally Posted by AlanG

Did it turn up mate?

NO GRRRRRRRRRRRRR

Expect it monday am now

J5

**AlanG** · Saturday 12th September 2009, 18:40

Originally Posted by Rnash2002

0.896317 lol

Not a bad guess by me then........

**AlanG** · Saturday 12th September 2009, 18:41

Originally Posted by Johnny5

NO GRRRRRRRRRRRRR

Expect it monday am now

J5

It'll be there mate,no sig req'd. Just pops through the letterbox in a jiffy bag...

**callyuk** · Saturday 12th September 2009, 19:21

had mine up to spikes of 1.4bar with no remap using r-spec mbc and somehow never hit the fuel cut but iv now got it running at a steady 1 bar to be safe now

**Johnny5** · Saturday 12th September 2009, 20:51

Originally Posted by AlanG

It'll be there mate,no sig req'd. Just pops through the letterbox in a jiffy bag...

Its going to my work address so i can be sure i get it!
And im going to go for no more than 1bar..... dont wanna put too much pressure on the ole gal!

hehehehehe

**sen** · Saturday 12th September 2009, 20:55

Let me no how you go on mate i may well purchase one of these mate

**Johnny5** · Saturday 12th September 2009, 20:56

Originally Posted by sen

Let me no how you go on mate i may well purchase one of these mate

No worries, will post up some pics of the fitting!

**sen** · Saturday 12th September 2009, 20:59

Top man

**BigV** · Saturday 12th September 2009, 21:06

I have never been able to get any of my T5's to run more than 12psi with an MBC without hitting the overboost cutoff protection at SOME stage.

I currently have one fitted and yes, I can wind it up so it spikes at 16 PSI, the problem is it doesn't hold boost there. I assume the ECU pulls the timing or something because it will spike 16psi and tail off to 12psi and the car will feel as though it is holding back.... also when the MBC is wound out that far it WILL hit overboost on cold mornings or 3/4 throttle if you don't mash the throttle fast enough to make the autobox kickdown.

I have found setting it at 12psi gives a significant gain over stock and the car will hold 12psi without tailing off or hitting overboost........ and for some strange reason it actually feels faster in the mid to top range than setting it at 15 or 16psi.

The way it brings the boost in is so much more aggressive that pulling away from a standing start is much faster, but probably the mid to top end doesn't improve in the same way as you would get with a remap.

ps. I know overboost isn't the correct term but everyone knows what I mean.

**Johnny5** · Saturday 12th September 2009, 21:43

Originally Posted by BigV

I have never been able to get any of my T5's to run more than 12psi with an MBC without hitting the overboost cutoff protection at SOME stage.

I currently have one fitted and yes, I can wind it up so it spikes at 16 PSI, the problem is it doesn't hold boost there. I assume the ECU pulls the timing or something because it will spike 16psi and tail off to 12psi and the car will feel as though it is holding back.... also when the MBC is wound out that far it WILL hit overboost on cold mornings or 3/4 throttle if you don't mash the throttle fast enough to make the autobox kickdown.

I have found setting it at 12psi gives a significant gain over stock and the car will hold 12psi without tailing off or hitting overboost........ and for some strange reason it actually feels faster in the mid to top range than setting it at 15 or 16psi.

The way it brings the boost in is so much more aggressive that pulling away from a standing start is much faster, but probably the mid to top end doesn't improve in the same way as you would get with a remap.

ps. I know overboost isn't the correct term but everyone knows what I mean.

Top post young sir! I will bear that in mind... tyvm

**Johnny5** · Monday 14th September 2009, 22:47

Well the Rspec MBC is fitted! WOWEE...... best £29 ive spent in ages

Was going to do a full fitting update, but only had 30mins after work to fit it! So replaced the pipe from the actuator to the valve, fitted the pipe from the turbo housing to the other side of the valve, cable tied the whole thing in place and bob's ur uncle etc etc etc.... I am going to re-fit it properly when i get some time, making it into a dashboard/centre console mounted valve! so i can adjust it without having to stop and open the bonnet! I will post up full pics etc etc etc when i get to do it! But i must say it makes a HUGE difference to the performance, now peak boost at 1.3 - 1.4 bar and holding constant at 1bar!!!! God knows what it will be like in the wet because it breaks the wheels away very very easily now in the dry!!!!!!!!