martyrobertsdj

iTrader: (1)

Came home from work today (from out of the country) and the wife says.......

"something wrong with the car....nearly snapped my neck......like running into a wall"

Ahah.....fuel cut me thinks.......gets home, takes car for quick spin.....boost gauge whips round to about 20psi, so I back off sharpish!!!!!

Fitted an FCD and adjusted the MBC last month (before going away) but couldn't get it over about 17psi....maybe turned the MBC up a bit after I'd already seen 17psi!!!
I'm guessing the MBC has suddenly sorted itself out and when I adjusted it, it should have gone to more than 17psi, but for some reason didn't.....now it has!! ??
Will adjust it down tomorrow....see what I can get eh??

Strangely enough........fuel cut is obviously round about 21-22psi now, but when I briefly saw about 20psi today.....the knocklink only lit two greens!!! Does this mean I'll probably be able to put more than 17psi boost??
I know how careful to be, but just wondered if it may be something else affecting the boost, rather than the MBC......wastegate sticking maybe??

I have an EBC on order, so will feel safer when that is fitted. It's a Blitz SBC "S".....not the best I know, but better than an MBC I would think??

Marty

andypugh2000

You would be wise to take the MBC off and return it to std until the EBC arrives, you will blow the head gaskets if its a pre MY99 and you are boosting 22+ psi, my maximum with overboost warning is 1.27 bar which is around 19 psi and this was set by someone who knows their stuff

andy

stevebt

iTrader: (8)

im sure mine runs about 22psi but im not sure as the gauge is in bar but mine is 1.5 bar

Delboy2

1.5bar = 21.75psig

martyrobertsdj

iTrader: (1)

Discovered the problem!!!

Opened the bonnet and saw it straight away........the hose to the MBC was off!!! Guess I had no actuator control at all eh??? Ooops!!

Fixed that and reduced the MBC to be on the safe side.....went for a run and tweaked a bit more...settled at about 16-17psi for now....maybe just touches 18 or so for an instant when first hitting the throttle in 5th.

Only one, occasionally two lights on Knockilnk, but then only if I thrash it, so I thinkstill pretty safe for now.

Looking forward to getting a bit more control with the EBC.

Cheers,

Marty