chip wizards custom map on hybrid gt2x

[davegolfturbo]

hi all just thought i would write a post regarding todays trip out to chip wizards (wayne schofield) to get my 1.8t custom mapped.

ok so the day starts by giving my car a dyno run before starting the mapping session, to see what the car was running... the car got to 282bhp on a stage 1 tweeked jabba sport map. The car seemed to not be running correctly
this was because:
- it was far to rich mid range
- the turbo not spooling up correctly only peakign boost at 5500 rpm!!! (1.5 bar)
- runnign slightly lean towards the top of the rev range and also maxing out the injectors.....

wayne then downloaded the ECU and was then able to start making modifications for the new map. once he had done the modifications for the injectors, boost and also the new 3" MAF sensor, he then said lets try put it on the ecu and then we can start tweeking it on the rolling road.

so....we put the 4 bar fuel reg on the car to make sure the injectors were not running out and re tested it on the dyno....he said that the injectors seem a lot better with the 4 bar reg and we proceeded to put the modified map onto the ECU.....

now here is where the problems start.

1. we could not get my ECU to accept the new file onto it... after trying 3 diffeent types of software wayne decided that there was something that wasnt right, he suspected that it was a chip that had been used and made so that no one could mess with it......he was right! we took apart the ECU and there it was a jabbasport chip. so he then removed this and could proceeed to load the map on the old fashioned way!

2. after finally get the ECU to load the new map on, we noticed that the boost was not bossting correctly so he decided to force the ECU to try and make the boost come in earlier!...still no sign of improvement so he thought there could be a leak. we pressure tested the car and found a major leak on one of the vacum pipes, so fixed this and re dyno'd the car once again...... this time the turbo seemed to be peekign at 4500 revs. Which was better but not as low as i would like to have seen, and have seen most people with the same turbo achieve. The car was now running 294.6bhp,

the turbo was turned into a hybrid by a company called CR turbos which i know a few members on here with the same turbo have used, they said that the standard actuator is not very well designed and have created a better actuator that is at a better angle to make the actuator action smoother. wayne seemed to think that this could be where the problem lies. i remember when i got my turbo back from CR Turbos that on the inside of the exhaust side the actuator pin/washer seemed loose, and i could spin the washer ...maybe this could be the problem that the actuator is not keepign closed therefore the turbo is leaking boost and could explain the high peak power and slow spool????

3. anyway by this time things started to seem not very promising. i was happy with the output but the turbo spool was not good.
he then also said that the car seems to be runnign very lean at top revs. he got out a fuel pressure gauge and watched that whilst doing the next dyno....this confirmed that the fuel pump could not put up with the pressure it needed and was dropping at the top end. (he said that it should be around 5.4 and it was only running 3.8 (if i have my figures correct). the long and short of it is i needed a new fuel pump to be able to do the map correctly.

i just would like some feedback or advice if possible as what to do next. i know i could get a direct uprated replacement for the fuel pump or an in line one....which would be better? and can anynone shed some light on the problem of slow spool and the turbo only peeking at high revs?

thanks and sorry for the long post it to has been a long day for me!

dave.

 

[davegolfturbo]

or is there any way of checkign the actuator is closed without having to take the turbo of the car or start removing downpipes?

dave.

 

[Adam R]

my god that was hard to read!

try spacing things out a bit so people can read it without getting a headache and you may get a slightly better result with replys

 

[davegolfturbo]

lol sorry it was a quick post last night and i had loads to cram into one post i will try and re word it and re post it. any advice though?

dave.

 

[davegolfturbo]

ok the original post is now edited hopefully this will be easier to read. Please see above for post.

thanks dave.

 

[DaNnY_LaD]

Alright mate..

If funds allows id get a LCR intake one if you can...If not get a Walbro Inline would be up 2 the job...

But id personally got for a intake fuel pump from the LCR which is a 4bar....

 

[davegolfturbo]

hey dan! ye sounds a good idea, did u manage to find any more info out about each one?

does anyone know where i can get one of these for a reasonable price?

just took my car for a spin noticed that since fixing the boost leak it seems to be coming in at around 2700 rpm but still only peaking at 4500 at 1.5 bar. i am going to try and wind the actuator arm out a bit to see if that keeps it under more tension meanign it will keep it closed. hopefully this will work and i will see peak boost earlier!

dave.

 

[Adam R]

please do not start playing about with the actuator. its the last thing you want to do as that will change boost but not fueling / timing... which 'could' end up with you running your engine lean

 

[DaNnY_LaD]

hey dan! ye sounds a good idea, did u manage to find any more info out about each one?

does anyone know where i can get one of these for a reasonable price?

just took my car for a spin noticed that since fixing the boost leak it seems to be coming in at around 2700 rpm but still only peaking at 4500 at 1.5 bar. i am going to try and wind the actuator arm out a bit to see if that keeps it under more tension meanign it will keep it closed. hopefully this will work and i will see peak boost earlier!

dave.

Still looking mate...

Me and a few others were seeing 2.5k spool and full boost around 3750 some abit sooner depending on Manifold...

Id defo recommend a 3'' turbo intake pipe mate...I went from 4.1 to 3.8 just by changing air filter and tip....Defo a worthy shout.

The LCR ones are around £197 last time i looked and the inline walbro around £100+ ...

 

[DaNnY_LaD]

please do not start playing about with the actuator. its the last thing you want to do as that will change boost but not fueling / timing... which 'could' end up with you running your engine lean

Its ''Loose'' mate he isnt looking for any gain what so ever...As the mapper said its loosing Topend boost via the wastegate as it aint closed fully...

It could be that cr didnt set the actuator correctly or even though havent changed the spring to a 1bar spring..

has happened before..

 

[davegolfturbo]

i tried to wind the actuator out a little bit, but only managed to crack the locking nut and then get 1 1/2 turns out of the nut nearest the actuator "can" before rounding the nut of. This is because you could not get a spanner onto it correctly as there is two big nuts either side holding the can onto the turbo!

so im just going to take the actuator off the car and send it back to CR turbos, they can then test the actuator and sort it out for me. Then all i need to do is bolt it back on and make sure that it keeps it closed.

when i did take the rod of the hook like thing on the exhaust side of the turbo there was a little bit of tension, so it sounds to me like it could be closed but more tension may make it close better when the revs come in higher up...the other thing that is strange when i got the turbo back from CR TURBOS i could literally spin the washer inside the turbo which the actuator connects to to keep closed, so surely this means it is not held closed??? cars are starting to stress me out lol i just want it sorted now!!!

thanks for replies guys, dave.

 

[ibizacupra]

GT2X and you want good spool?



wastegate penny should not spin when actuator is connected to it.
What static pressure is the actuator? Surely this would have been checked by Wayne as its a baseline for boost to work up from.

more than 1.5bar from the crap design of GT2x is'nt likely from any of the ones I have seen. They are simply very poor units, as laggy as proper big turbo's but without the power to go with them.

 

[davegolfturbo]

i know this but it has been re built to a garrett standard. i appreciate that the turbo is a "laggy turbo" but no way should it only be peaking boost at 4500 rpm! as danny lad said his was peaking as soon as 3500 which would be much better!

the wastegate penny deffinetely spins when the actuator arm is under tension, so this tells me that no matter how much more tension i put on the actuator spring it still wont close the wastegate penny, as the "hook" whichh the rod connects to is at the furthest point it can be as in "closed" if that makes sense?! so not matter how much i wind the rod to be more tensioned it still menas the penny is not closed! :S

dave.

 

[davegolfturbo]

what does static pressure mean. i have'nt heard of this before, so just need to be informed if possible

 

[davegolfturbo]

i think i know where the problem is. I have just spoke to CR TURBOS and he confirmed to me that they will not have changed the arrangement between the wastegate penny and where the actuator rod connects to it, on the outside of the exhaust housing.

I knew that my wastegate penny was loose before i sent my turbo in to be re built, but thought this could be down to the weak actuator and it not been set correctly. Now that a "stifer spring/actuator" has been put on and the wastegate penny is still "loose" when the actuator is in the "closed" position indicates that there must be an internal problem with the wastegate.

the turbo place said that this could be due to:

-there been some deposit of weld in the bush, where the wastegate passes through to connect to the actuator rod. Causing it not to "close" properly.
-there been a problem with the turbo housing, which is essentialy blocking the movement which would cause it not to "close" properly.

I am going to take the downpipe of and check for sure that this penny is deffinetely loose and that i can spin it with my finger. I am 99% sure of this, as when i got the turbo it was "loose" in the "closed" position as explained before. Also my friend can confirm this, which makes me even more sure.

so hopefully, although it will be a pain in the ass to take the turbo back of, when it gets sent back the turbo gets sorted properly. Mark at CR TURBOS also said it should have been standard practice to test the turbo and check everything was perfect before sending it back and if this is the problem, due to the expense it has cost me he will propose some kind of compensation.

Just to mention Mark has been extremely helpful at CR TURBO'S, so i dont have any issues at all with the company and/or him and would not suggest anyone to be put off by this. At the end of the day if this is the issue (which i will be able to 100% confirm next week) then one is only human i suppose and problems can arise.


Dave.

 

[ibizacupra]

i know this but it has been re built to a garrett standard. i appreciate that the turbo is a "laggy turbo" but no way should it only be peaking boost at 4500 rpm! as danny lad said his was peaking as soon as 3500 which would be much better!

dave.

Any I have never seen any log proof of this claim. No other GT2X I have seen has managed anything better than you now get. 4krpm spool

static pressure is what boost you will achieve with N75 valve electrically disconnected

 

[DaNnY_LaD]

Any I have never seen any log proof of this claim. No other GT2X I have seen has managed anything better than you now get. 4krpm spool

static pressure is what boost you will achieve with N75 valve electrically disconnected

Id have to sadly agree...I loved my Gt2x and it was good fun when in the right rev range...

You'd never see 3.5krpm Full boost on a gt2x hybrid...I managed to get it down to 3750rpm ( Proof With Logs) But even for some that is too laggy for the reward you get....

That Metal Shouldn't spin when the actuator is closed shut (undertension),Like i mention on the phone the 1st thing i would of done is to do the static pressure test if i was a mapper ect..

If this actutor sorts it you should be on full boost around 4krpm No later....But your running a ATP oval TIP aint you with a Underated Airfilter....

So a restriction is a plausible question...

Get the actutor back and fit a Decent enough fuel pump and take it from there its the only thing you can do sadly....

P.s get a Decent enough air filter rated @ 300bhp+....

 

[davegolfturbo]

yeah i have an airfilter which should flow enough air to support the 300bhp i think i told you about it on the phone! as i explained before the wastegate penny is not keepign closed so this will also be a cause of the slow boost it is as high as around 4500 maybe even closer towards the 5000rpm mark! which is very laggy! even for this turbo.
hopefully when i get the turbo off and sent back they can sort it out and as he said on the phone offer me some kind of compensation for the inconvinience and cost!

thanks dave.