Boost PSI question, turbo dieing?

[shav4life]

Hi all, my first post so please be patient with me.

I have to two questions, i have a seat leon cupra 2001

1. my turbo pulls around 1600-1700 mbar max, which is equlevent to about 23 psi, is this ok? or should i be getting more? Am talking about reving over 4000 rpm

2. i recently changed my dump valve (which had borken "no vaccum holing" to a forge dump valve 007 ones, and i think my turbo is loud, well i can hear it when I'm boosting so the question is:

A) is it normal to hear a low wisthle under boost, something like over 2.2k rpm?


B) do u think the broken valve or the mal functioned valve could have daamged the turbo?


truth of the matter is i just bought the car, it has done 100000. one lady owner and full main delaer service history and i paid £2100, with one year mot and 6 months tax.

price is good or?


many thanks,

 

[traumapat]

is the car chipped/remapped? is it spiking to 1.7bar or holding?

its been ages since i was standard but that sounds high... may not be high if the cars remapped though.

cant say mine ever whistled ... standard air filter? do you have the black felt cover attached to the underside of the bonnet... this is sometimes removed and can make engine noises more noticable.

the whistle maybe a leaking boost pipe... everything tight on the new dv?

 

[BCM]

High, thats way high!
A standard LCR only hits about 12psi!
You can usually hear some turbo whistle, but if its excesive then it might be a split pipe or worn turbo but it should be fine, if its hitting that boost then the "one lady owner" who had it before you has a tast for mapping!

 

[shav4life]

High, thats way high!
A standard LCR only hits about 12psi!
You can usually hear some turbo whistle, but if its excesive then it might be a split pipe or worn turbo but it should be fine, if its hitting that boost then the "one lady owner" who had it before you has a tast for mapping!

guys i thought the more pressure means more power loool. so more psi means turbo is dying?

everything is stock except for forge dump valve.
it kind of stays for a sec or two then dropps back to less than 1100 - 1000 mbar.

so yeah its spiking? is that bad?


and yea i had leak issues before, a day after i fitted the dump valve, vag reported, system too rich, loss of pressure, i went and bought jublee hose clamps, now no more errors but i can hear the turbo a little bit like i mentioned in my other post.



thanks for the replies, i really appriciate it. its the first time i have owned a turbo so am a total noob.

 

[BCM]

Eh, no more boost means more power - usually, but if you have too much you go bang!
Seems to spike very high! Shouldn't really happen.

 

[shav4life]

Eh, no more boost means more power - usually, but if you have too much you go bang!
Seems to spike very high! Shouldn't really happen.

so the turbo is giving enough power for now?

i dont really mind if it fails at some point, i was going to buy anew turbo anyway, there is one for £329 it says its sopose to increase the bhp to upto 240-260.


any idea if i need to change anything for this new turbo?

http://cgi.ebay.co.uk/SEAT-LEON-SKO...=39:1|66:2|65:2|240:1318&_trksid=p3286.c0.m14


thanks,

 

[ibizacupra]

Hi all, my first post so please be patient with me.

I have to two questions, i have a seat leon cupra 2001

1. my turbo pulls around 1600-1700 mbar max, which is equlevent to about 23 psi, is this ok? or should i be getting more? Am talking about reving over 4000 rpm

2. i recently changed my dump valve (which had borken "no vaccum holing" to a forge dump valve 007 ones, and i think my turbo is loud, well i can hear it when I'm boosting so the question is:

A) is it normal to hear a low wisthle under boost, something like over 2.2k rpm?


B) do u think the broken valve or the mal functioned valve could have daamged the turbo?


truth of the matter is i just bought the car, it has done 100000. one lady owner and full main delaer service history and i paid £2100, with one year mot and 6 months tax.

price is good or?


many thanks,

1600-1700mb as read by what? vag-com or boost gauge?

 

[smithygcupra]

Youre all on about turbo whistle being a leak of some sort.... my Lc is standard and if i got the windows down and give it some welly... as the boost picks up i can hear some whistle from the turbo... its not excessively loud but is quite noticeable.... my car doesnt seem to have lost any power at all so dont think its got any leaks anywhere.... i hope....

i thought standard LC's were about 0.5 bar (7.35 psi) that seems really really high....

 

[BCM]

so the turbo is giving enough power for now?

i dont really mind if it fails at some point, i was going to buy anew turbo anyway, there is one for £329 it says its sopose to increase the bhp to upto 240-260.


any idea if i need to change anything for this new turbo?

http://cgi.ebay.co.uk/SEAT-LEON-SKO...=39:1|66:2|65:2|240:1318&_trksid=p3286.c0.m14


thanks,

You might wanna stay clear of these, if its a Ko3s copy then there are lots of diff threads on here about the change, whay engine code is yours?

 

[shav4life]

ibizacupra: the readings are by vag-com


smithygcupra: well you see, the vag-com shows two pressure screens, when i go to block 115, first one is 1000 mbar constant, second mbar is always 1020 hardly ever goes down and when i go above 4000 rpm it jumps to 1600-1700 mbar which is around 22-24 psi

the first mbar box i think is called atmospheric pressure, the other boost pressure, am not 100% sure i need to check again.

the whistle isnt that bad, if i roll down the window i can hear it, but nothing excessive. i just wanted to know if they are sopose to make any sound atall.



BCM: my engine code is AUQ

,

Thanks for the reply, guys, its appriciated

 

[traumapat]

it sounds mapped. if memory serves standard holding boost is about 0.8bar?

does it feel fast?

be very careful before replacing turbos.. have a read through threads on here. if thats the route you go down either stick the same model turbo back in or a proven upgrade. as said there maybe little wrong with yours... have you checked the air filter for leaves?

forge 007 will allow you to hear more of the turbo, has it been since fitting it?

 

[shav4life]

it sounds mapped. if memory serves standard holding boost is about 0.8bar?

does it feel fast?

be very careful before replacing turbos.. have a read through threads on here. if thats the route you go down either stick the same model turbo back in or a proven upgrade. as said there maybe little wrong with yours... have you checked the air filter for leaves?

forge 007 will allow you to hear more of the turbo, has it been since fitting it?

yes its very fast, my friend has a golf gti turbo 150 bhp, when he got in my car and i floored it, he said he has never being in a car this fast but to be honest he is 30 bhp short so maybe thats why?

well my mbar never goes under 1020 , very rearly goes to 1000 but thats about it. it spikes upto 1700 but then goes back to 1100 and around that.

i can't be sure its mapped, coz it has only one lady owner, dont think she would be a fan of this stuff?


yes you are correct, the whistling is right after i fitted the forge 007, never before. so i guess its nothing to worry about?

 

[traumapat]

yes its very fast, my friend has a golf gti turbo 150 bhp, when he got in my car and i floored it, he said he has never being in a car this fast but to be honest he is 30 bhp short so maybe thats why?

well my mbar never goes under 1020 , very rearly goes to 1000 but thats about it. it spikes upto 1700 but then goes back to 1100 and around that.

i can't be sure its mapped, coz it has only one lady owner, dont think she would be a fan of this stuff?


yes you are correct, the whistling is right after i fitted the forge 007, never before. so i guess its nothing to worry about?

if its the standard turbo and the boost levels are as you say then its pretty much at max.
any more boost and bang TBH im going by these figures as if they show on a boost gauge. im not sure if theres any difference when taking them off vagcom.

If you have access to vag com you may be able to log the maf which can give a rough idea of bhp (i think) which should confirm the cars remapped.

id ignore the lady owner bit. some of the ladies ive met are nutters! if its driving well and warmed up properly before booting it you should be fine.

id put the whistle down to the dv allowing you to hear it. keep an ear on it.

sounds like youve got a good motor.... id get a boost gauge fitted at some point.

Bill will correct me if wrong but you dont want that boost spike creeping up any higher (which it shouldnt if alls running right)

 

[shav4life]

hehe yeah maybe the car is mapped and i didn even know. TBH this is the first turbo car i have owned so i don't know what kind of power/perfomance/problems to expect.

am learning new things every day, and yeah i always warm up my car before driving regardless of turbo or not but i never knew i also have to leave it on for a cool down period after a long drive.

i will try not to rev it to the max any more, i redlined it afew times in the past but that is probably not a good idea and i should stop before damaging anything.

the whistle is deff the forge DV as you say, because it was never there before, but after the forge DV i got that sound and i thought i had a split piple or leak but as you say boost levels are more than normal.

can you tell me how to check the MAF via vagcom to get a rough idea of the bhp?

thanks alot,

 

[traumapat]

although its wise to take the last couple of miles easy.. its not so much a long drive as a very hard drive. the turbo will glow red hot when being pushed hard and once you switch off the engine, the oil stuck in the turbo starts cooking the turbo internals.

redlining is pointless more than damaging. 5500rpm is max power usually. the turbos run out of puff

id have a search through the vagcom section of the forum. from memory you need to log block 003 to get the air flow.
my vagcom knowledge is pityful. i usually pester DPJ if i cant find it by searching

 

[edh]

yes its very fast, my friend has a golf gti turbo 150 bhp, when he got in my car and i floored it, he said he has never being in a car this fast but to be honest he is 30 bhp short so maybe thats why?

well my mbar never goes under 1020 , very rearly goes to 1000 but thats about it. it spikes upto 1700 but then goes back to 1100 and around that.

i can't be sure its mapped, coz it has only one lady owner, dont think she would be a fan of this stuff?


yes you are correct, the whistling is right after i fitted the forge 007, never before. so i guess its nothing to worry about?

Unless I'm missing something you're not allowing for the 1000mbar which is atmos pressure - your actual boost will be spiking to 1000 less than this, ie 700mbar which sounds about right for a non-mapped Cupra. My VAG-COM readings spike to around 1680 as well and mine's a non-mapped Cupra.

On block 015 you've got spec boost which is what the ECU is requesting and actual boost which is what is the MAP (I think) has measured. You want these figures to be pretty close, otherwise you could have some sort of boost problem. When VAG-COM refers to spec and actual 'boost' it's actually including atmos pressure.

 

[shav4life]

sorry I don't understand this part of your post

Unless I'm missing something you're not allowing for the 1000mbar which is atmos pressure - your actual boost will be spiking to 1000 less than this, ie 700mbar which sounds about right for a non-mapped Cupra.

on block 115 i got two mbar readings, first one is always 1000 and the second one which is the first from the right its always 1020 and spikes around 1600-1700 when i go above 4000-5000 rpm.

can you please explain what this really means?

i will also try and record block 015 and 003 to see what they say. will update you guys in a bit.


Thanks,

 

[ibizacupra]

sorry I don't understand this part of your post



on block 115 i got two mbar readings, first one is always 1000 and the second one which is the first from the right its always 1020 and spikes around 1600-1700 when i go above 4000-5000 rpm.

can you please explain what this really means?

i will also try and record block 015 and 003 to see what they say. will update you guys in a bit.


Thanks,

1000mb is atmospheric pressure..
Just to confirm what you are quoting here as boost figures are from vag-com, as you confirmed, and are as reported by vagcom... so 1600mb as logged which is 600mb boost NOT 1600mb boost.

0.6bar vs 1.6bar (8.7psi vs 23.2psi) in Boost terms

Is this what you mean?

 

[shav4life]

1000mb is atmospheric pressure..
Just to confirm what you are quoting here as boost figures are from vag-com, as you confirmed, and are as reported by vagcom... so 1600mb as logged which is 600mb boost NOT 1600mb boost.

0.6bar vs 1.6bar (8.7psi vs 23.2psi) in Boost terms

Is this what you mean?

so whatever boost pressure vag-com reads reads, i have to deduct 1000 mbar?

well that means i get around 700mbar which is about 10 psi.

so this is normal? or too low?

thanks,

 

[traumapat]

well at least you know if you get it mapped it will go even better.

didnt realise the difference between vagcom and gauge readings.