Whats this then (detonation?)

[88GT-R]

the controller will limit the boost as wastegate springs are never going to be 1 bar as u wld be spiking all over the place..of the spring is 5-7 psi u cld then use the controller and turn the setting right down to whatever boost u want and the profec will then bleed off overboost

No NO...I ain\'t flaming you, just educating:D He has not fitted a boost controler yet, so fitting one WILL NOT limit creep.
A boost controler effectively increases the boost created by the turbo by \'bleeding\' the pressure seen by the wastegate actuator. This is done at the vaccum source prior to the actuator by the boost control solonoid.
Boost creep is caused by the wastegate/actuator being too small, and is manifested by a more efficient induction system and/or efficient exhaust system.
Cheers,

John

[88GT-R]

Might well fit the boost controller today though, can someone point me in the right direction of where to fit it and can I use 4mm vac line or do I need to go and get some 6mm, also isn\'t one of the lines I will be replacing one with a pill in it, do I still need this?

A

Hi,
As stated in the previous reply, fitting the boost controler is not going to help. But what will go a long way to helping is to remove the pill from the actuator line. This will inhibit the creep and should keep the pressure down to about 0.65bar.
I would also suggest that you speak to the mapper and ask his advice on how to increase the Mixtrim by a couple of percent. This will increase your fueling across the board, slightly.
Cheers,

John

[allstaruk]

So how do people lower boost then using a boost controller, surely you can up the boost with one so you must be able to lower the boost with one?

If the wastgate spring is set to 0.5bar then with the right controll you could drop it down to that?

A

[88GT-R]

So how do people lower boost then using a boost controller, surely you can up the boost with one so you must be able to lower the boost with one?

If the wastgate spring is set to 0.5bar then with the right controll you could drop it down to that?

A

No.....If you fit the boost controler and have it set to 0 across the board, you will still have the same problems you have without it.
It is your choice, but the advice i am giving you is spot on. Remove the pill and see.

J

[allstaruk]

I\'m not doubting you I\'m just getting confused, I\'m not saying that it will cure my boost problems but are you saying that a boost controller cannot lower the boost.

A

[Mave]

I\'m not doubting you I\'m just getting confused, I\'m not saying that it will cure my boost problems but are you saying that a boost controller cannot lower the boost.

A

I think he\'s saying that the boost controller can\'t reduce boost if the wastegate isn\'t big enough to bleed enough flow. You can use it to delay boost by opening the wastegate early, but ultimately when the wastegate is open, its open, and the boost controller won\'t be able to open it further

[Carl]

Just use the Apexi to control boost pressure and duty on the wastegate.
It should be possible to prevent boost spikes if mapped properly.
You do not need a boost controller to do this.
Regards
Carl

[allstaruk]

Just use the Apexi to control boost pressure and duty on the wastegate.
It should be possible to prevent boost spikes if mapped properly.
You do not need a boost controller to do this.
Regards
Carl

Cool I\'m begining to understand, the plan was to use the boost controller to alllow me to have 2 settings when the car is finished so I can have high boost for a bit of fun and then be able to drop it for daily/wet driving is this feasable?

Also i guess I need to get the car mapped before I can really drive it now as I run the risk of maxing out the injectors?

A

[88GT-R]

PM sent...cheers