boost controllers

[beerad]

ive just bought a gfb boost controller and i just want some help on how to fit it and what boost level i can safely run on a caldina GT-T

[Alex B]

safeset level of boost is factory unless you have big pockets.

[beerad]

thats what i thought, do you know what the caldina gtt's factory limit is and any pit falls in installing a boost controller. Also will i gain fuel economy if I lower boost? cheers

[Inane]

I don't know about the fuel economy thing,

however, boost controller wise
pitfalls are =
-car wont run low boost while warming up, so you need to make even more certain the car is warmed up before planting boot.

-you will be tempted to run more boost (especially if your mistery mind controlling NEED-MORE-BOOST plug is connected.)



on the note of how much boost you can run, AFAIK from what fivebob and others have said, the most amount of boost you can run safely (safely as in not hurting the engine or the turbo) is <=1 bar (<=14.9psi)

[EVLGTZ]

however, boost controller wise
pitfalls are =
-car wont run low boost while warming up, so you need to make even more certain the car is warmed up before planting boot.

why wouldn't it run low boost if it hadn't warmed up?

Surely the boost controller will control boost regardless of engine temp.

I know mine does.

[Inane]

however, boost controller wise
pitfalls are =
-car wont run low boost while warming up, so you need to make even more certain the car is warmed up before planting boot.

why wouldn't it run low boost if it hadn't warmed up?

Surely the boost controller will control boost regardless of engine temp.

I know mine does.

oops. terrible english.

What I meant was,

The car will no longer have the maximum boost limited to around 7psi while the car is cold,
(I'm sure fivebob or someone will correct me if the figures are wrong)
with the stock boost controller the max boost is limited to around 7psi until the car has warmed up to optimum operating temperature.
the stock boost controller also lowers the max boost in extreme operating environments such as when the ambient air temperature drops below (iirc)
5°C

[Scottie]

you have it around the wrong way. When you install a boost controller you dissable the T-VSV. So when the boost control is truned right down it will boost the lower factory boost setting.

[Santa'sBoostinSleigh]

-you will be tempted to run more boost (especially if your mistery mind controlling NEED-MORE-BOOST plug is connected.)

off topic: mine is *un*plugged and i want more boost!!

[Inane]

you have it around the wrong way. When you install a boost controller you dissable the T-VSV. So when the boost control is truned right down it will boost the lower factory boost setting.

unless your boost controller isn't turned right down.. in fact a decent boost controller, will allow your boost to stop at or go up to wherever you want it to!

[fivebob]

in fact a decent boost controller, will allow your boost to stop at or go up to wherever you want it to!

Only to the actuation pressure of the wastegate which on the Stock engine is 7psi.

You're right about the fitting a boost controller removing the factory safety settings, like reduction of boost when the engine is cold, or when knock is detected. In fact I'd advise not fitting a boost controller to a stock engine, unless you want to lower the max boost setting. IMHO Engines with aftermarket management systems and properly mapped ignition curves for the fuel being used, are the only sort that should have the boost turned up.

I'm not a fan of cheap aftermarket boost controllers, they probably account for more blown engines and driveability issues than all other causes combined. The good EMS's have their own controllers that will allow boost to be kept low when the engine is cold, as well as a host of other useful features like speed/gear dependent boost control.

[Inane]

in fact a decent boost controller, will allow your boost to stop at or go up to wherever you want it to!

Only to the actuation pressure of the wastegate which on the Stock engine is 7psi.

except a decent boost controller will have an electronic solenoid... that only lets that 7psi get to the wastegate actuator, when you want it to.

[fivebob]

in fact a decent boost controller, will allow your boost to stop at or go up to wherever you want it to!

Only to the actuation pressure of the wastegate which on the Stock engine is 7psi.

except a decent boost controller will have an electronic solenoid... that only lets that 7psi get to the wastegate actuator, when you want it to.

Yes, but that only allows for pressures greater than 7psi, you can't go lower than that, but you can go higher.