bigdog666

hi, what way do i turn the boost control valve to lower boost, im guessing you screw it in?

bigdog666

anyone got any ideas, iv only had a scooby 2 weeks, so not sure, cheers

bigdog666

ok, someone on the general forum has advised me.

Peanuts

iTrader: (15)

from memory you need to consider the dawes device as the amount of control over the boost.
Screw it out to lengthen it lowers the boost

bigdog666

now in confused, iv been told to screw it in and lower it to lower boost, any ideas before i cook my engine, i want to try lowering it as it may be overboosting, never had a turbo before until 2 weeks ago, so i really hav'nt got a clue

Peanuts

iTrader: (15)

you need to look at your boost gauge to see if it lowers or increases.

bigdog666

only trouble with that is i need to floor it to get full boost, dont really want to do that if iv turned the boost up, could destroy my engine

Peanuts

iTrader: (15)

what MBC is it?

bigdog666

whats mbc, iv only had the car 2 weeks, aint got a clue about all these things, never had one before, not particulaly impressed with it so far!!

Peanuts

iTrader: (15)

ok take a big breath and relax, ikts an easy to sort issue.

Installing Dawes Device Question [Archive] - Turbobricks Forums

a quick google threw this up.
MBC= manual boost controller, commonly referred to as a dawes (short for the product name "dawes device")
its a brass fitting about 3" long that sits nicely on top of the turbo between the compressor shell (the shiny clean alloy looking snail shell commonly called the "coldside") and the actuator (the gold coloured little pot that sits on the turbo and links the shiny bit at the front to the rusty bit at the back (commonly called the "hotside" as it gets bloody hot )

bigdog666

i think iv got one, has it got a spring with a bolt that screws up and down and 2 opposing pipes coming out of the bottom?

BigBez

this bascially is a manual boost controller



you turn the screw at top to lower or higher boost.......at the same time looking at your Boost gauge to make sure you dont over do it, very small turns is best

bigdog666

dosnt look like that, but probably same in principle

bigdog666

can someone please help, does anyone know which way i turn my boost control valave to lower boost, someone must know

Peanuts

iTrader: (15)

well why dont you post a picture of what the unit looks like then rather than everyone trying to guess

Peanuts

iTrader: (15)

Basic Boost Controller

does it look like this?

bigdog666

no nothing like that mate, its a hexagonal shaped bar, 2 inch long, 2 pipes coming from the bottom with a spring loaded bolt that turns on the top, cant seem to get a pic on here, its got a piston type thing inside it that moves up and down depending on how you screw the bolt at the top

Peanuts

iTrader: (15)

take it off then and plumb it back to OE.
maybe you should start another thread about though

bigdog666

its been remapped with it, i havnt got a clue about turbos, i aint touching it, think il just vtorch the car, cheers everyone

bigdog666

i really dont see why it should be that difficult, someone mustve raised or lowered thier boost on here, theres 75,000 members, just cant believe no one knows which way to turn it!!

adzer

iTrader: (13)

when i had one of these fitted on my car i screwed mine in making the hole inside smaller to INCREASE the boost, and unscrewed it making the hole inside bigger to DECREASE boost.

all should be the same but dont hold me responsable for it. if it over boosts fuel cut should cut in and ur engine wont blow.

on another note when cars are remapped they normally turn boost up or down electronically. but if they have mapped the car using this manual controller i'd not bother touching it as its mapped to that boost level???

personallt i'd just remove it from the system as they are not reliable imo

bigdog666

only trouble is if i remove it thats gonna alter the boost and probably wont run any better than it does now

adzer

iTrader: (13)

if u remove it u wont get fuel cut or over boost and if you do there is a problem somewhere

bigdog666

il have alook 2moro, chers everyone