Post 463819 by JT on 2012-02-16 21:07:35
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
Post 463826 by mitchyboy01 on 2012-02-16 21:34:05
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?
Post 463827 by Volvostorm on 2012-02-16 21:37:15
Your running a TT ecu
Have a look at your boost map
Post 463829 by mitchyboy01 on 2012-02-16 21:40:39
Try the mbc to override the bcs and see what happens
Post 463830 by mitchyboy01 on 2012-02-16 21:43:07
[quote=Pault5estate;463827]Your running a TT ecu
Have a look at your boost map[/quote]
Surely it would still boost though at actuator pressure minimum. How could it not?
Post 463845 by LiamT4 on 2012-02-16 22:03:17
What boost is it hitting when it does come in? and is that the boost its supposed to be hitting?
Post 463859 by M-R-P on 2012-02-16 22:34:53
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.
Post 463906 by claymore on 2012-02-17 07:27:23
yea, I would go with winding the actuator in, to see if that makes a difference
Post 463908 by bigrotch on 2012-02-17 07:45:09
Put rip kit on aswell helps spool up defo wind in actuator
Post 463909 by JT on 2012-02-17 07:59:26
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
:)
Post 463910 by bigrotch on 2012-02-17 08:05:28
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
Post 463911 by JT on 2012-02-17 08:20:12
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.
:)
Post 463913 by Nealevo on 2012-02-17 08:27:24
my old map used to work like a 'VTEC' get to 4500 rpm and all hell used to break loose, just a sugestion.
Post 463914 by mitchyboy01 on 2012-02-17 08:33:28
[quote=Nealevo;463913]my old map used to work like a 'VTEC' get to 4500 rpm and all hell used to break loose, just a sugestion.[/quote]
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.
Post 463922 by p fandango on 2012-02-17 09:45:22
[quote=mitchyboy01;463914]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.[/quote]
standard actuator pressure is only about 3psi (15g actuator), the boost is then raised via the ECU & BCS
Post 463923 by Nealevo on 2012-02-17 09:57:12
it was awful, thats why i changed it to a HLM 304, much better now
Post 463930 by mitchyboy01 on 2012-02-17 10:11:00
[quote=p fandango;463922]standard actuator pressure is only about 3psi (15g actuator), the boost is then raised via the ECU & BCS[/quote]
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
Post 463935 by JT on 2012-02-17 10:22:42
I did have a small amount of boost 0.4 bar low down????
Post 463938 by mitchyboy01 on 2012-02-17 10:32:53
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.
Post 463943 by Wobbly Dave on 2012-02-17 10:54:28
Is an opions a short opinion Johnny?
green ones.
Post 463962 by JT on 2012-02-17 11:54:11
Yea that's the 1 dave! Lol
Most of my edits are spelling mistakes ! Lol
Post 464053 by Alan M on 2012-02-17 18:51:35
The blues will be good as you have the TT ecu. Set the actuator properly using a vacuum gauge as you want the preload at the correct tension so the ecu can cope and control boost properly. What actuator are you using? The 19t item or a 16t item? As the actuator preload is different between them and getting the setup right is very important as the 850 ECU doesnt control boost all that well but it can be made to work if you set everything up properly and use the correct BCS for the 850 not a later one as they tend to spike a little. I did have good success with a V70 T5 BCS from the first of the line phase 2 BCS with all my turbos on the 850 ECU.
Post 464274 by JT on 2012-02-18 13:37:40
I'll have to investigate which actuator I have.
thanks Alan
I dont suppose there is an easy way to tell them apart?
Post 464316 by Jamest5r on 2012-02-18 17:54:43
[quote=johnnytempest;464274]I'll have to investigate which actuator I have.
thanks Alan
I dont suppose there is an easy way to tell them apart?[/quote]
They have codes stamped on them mate but you will have to take it off to see.
Pedro probably has the codes listed somewhere being the anorak he is :)
Post 464318 by JT on 2012-02-18 17:59:52
[quote=Jamest5r;464316]They have codes stamped on them mate but you will have to take it off to see.
Pedro probably has the codes listed somewhere being the anorak he is :)[/quote]
take it off????
not again??????
:wallbash:
cheers mate:)
Post 464320 by Jamest5r on 2012-02-18 18:02:29
It's only the actuator mate, easy 10 min job.
Edit..just seen pedro lurking :hidesbehi
Post 464328 by p fandango on 2012-02-18 18:12:40
[quote=Jamest5r;464316]Pedro probably has the codes listed somewhere being the anorak he is :)[/quote]
i have got the codes for which actuator came with what turbo, but don't ever remember seeing it marking on the actuator itself. I'll sort the list out in a bit
Post 464329 by Jamest5r on 2012-02-18 18:17:28
Im sure its stamped on the end of the arm?? but defo somewhere as i remember rumaging through Hamish's stock at the rr day last year and fitting one :)
Post 464342 by mitchyboy01 on 2012-02-18 18:39:56
I didn't remove mine to test it. Put an airline and used a hand held pump and gauge. I pumped it and watched the wastegate until it began to move.
Post 464922 by glock19 on 2012-02-20 00:24:40
If you are running the TT, is the MAF limiter setup properly ?