serious IAT issue

[LudoN54]

Hi,

experiencing IAT issue
it seems that it goes way too high( 212f)
got 2F0C Code, which is related to IAT sensor, tried to clean, and change it, but still same issue.

mods : BMS DCI, MMP downpipe, custom tune

i live in the caribbean so ambient is often high ( 86 and more)

you will find here some logs =>https://datazap.me/u/ludovic-poviac/...og=0&data=3-21

can someone help with this ?

 

[LudoN54]

Different line of thought,


Check and make sure both wastegate actuators work correctly, hold vacuum, move the flapper, etc.
Being that the system can not tell you if each turbo is working and if they are doing equal work, I would venture a guess that right now one is doing most all the work. EVEN though the logs don't reflect this fully. But if you where to compare yours to a known good setup you'd probably spot the difference in wgdc right away.


So target boost is say 18psi.
One gate is working one is not.
So one gate has to be closed more to meet target and the other is wide open.
That means the gates closed one is working harder, making more boost and heating the air more than should be. While the other just does much of nothing.

if i understand what is on the Log, it is saying that WGDC bank 1 and 2 are working equally

 

[LudoN54]

BTW, as i was subject to 30FF boost, i changed everything in the vacuum system ( it appears it was the pressure converter that was faulty)

 

[martymil]

They have a balance vacuum pipe between the two vacuum solonoids so both turbos will see exactly the same vacuum and if one is faulty or an actuator is faulty you will see a very high wgdc but in your case.its fine and in fourth it's only around 50%

As suggested your ic could be partially blocked through dirt and debris, maybe a good clean out is needed

My suggestions is to change it as stock is rubbish in the climate you drive in as it's the same as mine

As soon as you get a race intercooler you will should never see iats this high again or see any higher than 126f

You need to get those iats under 126f which you will never be able to do with a stock ic

 

[LudoN54]

They have a balance vacuum pipe between the two vacuum solonoids so both turbos will see exactly the same vacuum and if one is faulty or an actuator is faulty you will see a very high wgdc but in your case.its fine and in fourth it's only around 50%

As suggested your ic could be partially blocked through dirt and debris, maybe a good clean out is needed

My suggestions is to change it as stock is rubbish in the climate you drive in as it's the same as mine

As soon as you get a race intercooler you will should never see iats this high again or see any higher than 126f

You need to get those iats under 126f which you will never be able to do with a stock ic

vrsf 7.5competition
The old one was FULL of debris

 

[martymil]

So your getting high iats with a 7.5 competition ?

 

[LudoN54]

So your getting high iats with a 7.5 competition ?

nope, currently in the process of swapping the Stock IC to the 7.5 stepped competition

 

[Omar@VaderSolutions]

you made this more complicated than it shouldve been lol stock intercoolers sucks

 

[ShocknAwe]

you made this more complicated than it shouldve been lol stock intercoolers sucks

stock twins pushing high boost can overwhelm even a big FMIC. Game over if on stock fins.

 

[LudoN54]

 

[Asbjorn]

Time to mark this as solved lol

 

[LudoN54]

Well, I’ve been for a early quarantine run this morning,
80f ambiant température
104f IAT

That’s waaaaaay better
Not as good as my GTX2867R Mini Cooper R56, where I saw this morning 89f at 29psi

but still better than before

 

[LudoN54]

datazap.me | Ludovic POVIAC | New IC

datazap.me

3 logs on this one showing the improvemnt

 

[martymil]

Stock Ic's and hot climates don't mix, you could see it in the logs from the very beginning and thats why I suggested the ic.

All is perfect, get a custom tune you wont regret it.

 

[LudoN54]

Stock Ic's and hot climates don't mix, you could see it in the logs from the very beginning and thats why I suggested the ic.

All is perfect, get a custom tune you wont regret it.

Hell yeah !! we are currently working on the custom tune, we are planning on maxing out the stock turbo as i already have MMP1K waiting for install

 

[martymil]

23psi initial boost tapering to 20 psi up top is the best with not much if at all gain after that.

They fall flat on their face after 20 psi up top as all they push is hot air.

 

[turbohugh]

This is why MHD recommends upgraded intercooler and downpipes for Stage 2 maps.