opions please

JT · Thursday 16th February 2012, 21:07

Hi all,I'm just after ideas,dont want to start another debate

I'm running a 19t,orange inj,3" tb,K&N induction,FSE fuel reg,lightened flywheel,quaife diff,R clutch,cossie fuel pump and above standard size air intake and boost pipes.
I have blue injectors ready to go in.

the main problem is the boost, need to get to 4500 before it kicks in????
maybe oversized pipes?
maybe a mapping issue?
maybe a fueling issue?
is it because the PTC is no longer "plumbed in"?

should I go back to standard size pipework?
and go back to a standard tb?
do I put the blues in?
should I go for an MBC?

any ideas,gratefully received

JT

**mitchyboy01** · Thursday 16th February 2012, 21:34

Is the wastegate fully closed mate? As if it was adjusted incorrectly it would take a lot more revs to get boost. Also are you 100% you dont have a boost leak?

I doubt bigger pipework would cause the extreme case you are describing. It would just have slightly more lag.

What's a PTC?

**Volvostorm** · Thursday 16th February 2012, 21:37

Your running a TT ecu

Have a look at your boost map

**mitchyboy01** · Thursday 16th February 2012, 21:40

Try the mbc to override the bcs and see what happens

**mitchyboy01** · Thursday 16th February 2012, 21:43

Originally Posted by Pault5estate

Your running a TT ecu

Have a look at your boost map

Surely it would still boost though at actuator pressure minimum. How could it not?

**LiamT4** · Thursday 16th February 2012, 22:03

What boost is it hitting when it does come in? and is that the boost its supposed to be hitting?

**M-R-P** · Thursday 16th February 2012, 22:34

Stick the blues in cos you may be short on fuel at the top end then get it mapped to suit

However, that won't cause the problem youre describing. Sounds like boost creep (w/g opening early and not allowing the turbo to spool up soon enough) try an mbc or tightning the actuator.

**claymore** · Friday 17th February 2012, 07:27

yea, I would go with winding the actuator in, to see if that makes a difference

**bigrotch** · Friday 17th February 2012, 07:45

Put rip kit on aswell helps spool up defo wind in actuator

JT · Friday 17th February 2012, 07:59

Cheers for the all the comments

Forgot to mention running TT ! Lol
How could I forget that??

When the boost comes in, it comes in at 1.2 bar, which is where I need it (regs)
The car had a rip kit on it as standard, I've just put larger pipes in its place.
I'll try the actuator first

Cheers guys

**bigrotch** · Friday 17th February 2012, 08:05

To be fair I'd say tt map is probably set like that to save bending something tweak it ya self to cOme on boost earlier mate

JT · Friday 17th February 2012, 08:20

You may well be right
I do need a mapping session , cos it was set up on the side of caution
to help running in. We just turned the boost up afterwards.

**Nealevo** · Friday 17th February 2012, 08:27

my old map used to work like a 'VTEC' get to 4500 rpm and all hell used to break loose, just a sugestion.

**mitchyboy01** · Friday 17th February 2012, 08:33

Originally Posted by Nealevo

my old map used to work like a 'VTEC' get to 4500 rpm and all hell used to break loose, just a sugestion.

That's an awful map then. The standard rods can easily take a bar at low revs so why have no boost until 4500! the lowest boost you can run is the actuator spring pressure regardless of map! So having no boost below 4500 there is defo a problem not associated with the map.

**p fandango** · Friday 17th February 2012, 09:45

Originally Posted by mitchyboy01

the lowest boost you can run is the actuator spring pressure regardless of map! So having no boost below 4500 there is defo a problem not associated with the map.

standard actuator pressure is only about 3psi (15g actuator), the boost is then raised via the ECU & BCS

**Nealevo** · Friday 17th February 2012, 09:57

it was awful, thats why i changed it to a HLM 304, much better now

**mitchyboy01** · Friday 17th February 2012, 10:11

Originally Posted by p fandango

standard actuator pressure is only about 3psi (15g actuator), the boost is then raised via the ECU & BCS

I know that mate, So why does he have no boost and not 3psi? Surely if it was map related he would still have at least 3psi at about 2k rpm

JT · Friday 17th February 2012, 10:22

I did have a small amount of boost 0.4 bar low down????

**mitchyboy01** · Friday 17th February 2012, 10:32

oh sorry mate, I thought you had zero boost. Could be an issue with the Mapping then, BCS, actuator, boost leak. First thing i'd do is override the BCS with a MBC. If problem goes then It's mapping or BCS related.