Hi, first posting on this forum so be gentle I posted this on boost addict too and taught there is maybe intrest to read it here too
so to keep things short, this is my buildup and goals on DD 2008 AT6 135i
i bought the car some 1 year ago for my wife`s DD winter car in a mistake,
former owner told it`s most dangerous winter car he ever had owned
so it was left for me as a toy.
car has assembled when bought catless downpipes and vrfs race fmic.
there was some tuning software inside too with 0,9 bar boost on it.
then it started to go as usual, first jb4, then turbos with 13T-6 billet compressors,
fuel it stage2 pump upgrade and a tbi with hobb switch. and that was setup for last summer but clipped stock turbine-13T compressor and 24 psi boost didn`t satisfy me cause of concern about exhaust manifold back pressure and mismatch turbine compressor sizing so i decide to do something to the issue.
i want very broad torque curve, driveability, minor impact on lag versus stock,
and some degree of power up in a rev range
I surfed around different forums for some month before i decided to contacted Tony from VTT, even there has been horror story`s about customer care, behavior on internet etc. he seems to be a legend in good and bad and asked his opinion about the build and how to proceed it and he suggested to move straight
from my first plans of GC lites to GC`s
after discussion about it i decided to do some mods to the car, weight reduction to 3070 lbs(done), upgraded turbos, db shotguns,(yes, we have very good quality e85
here aviable all around) cold side and hot side silicons, berk street exhaust and other small bits&pieces.
i started then to order parts from VTT and there was a mess, nothing to do with VTT, a bank issue at most and my deposit went to wrong account and on that it took over a week to resolve it but i was in contact with Tony every day about issue and at first, Tonys respond time for questions was extra ordinary fast every single time, and at the end got it done.
so the mod list is now like this
- VTT GC turbos ceramic coated inside out
- VTT inlets and hot sides
- VRFS race fmic
- charge pipe with raceport BOW
- VTT double barrel shotgun
- BERK street exhaust
- fuel it twin fuel pumps
- XHP stage 3 trans software
- quaife LSD
- crank bolt capture
- split second AIC to db shotgun
- JB4
- Trebila tune to 27psi
- ethanol analyzer
- MHD programming tools
- upraded spark plugs
- n20 tmap
- apex racing wheels
there is for sure something missing but get my point of performance
level i`m after.
then to order and install , issues and pros/cons
everything i ordered came in time,except those wheels i waited for 4,5 month, issue with supplier, exhaust came in time, burger tuning parts came in time VTT parts came in time and only missing parts up to date 1 small hose clamp from VTT order.
- Exhaust fitment was perfect, sound could be more softer to my use, my verdict 9/10
- lfpf fuel pump, not a problems at all, tight fit but everything is like it should be 9/10
- FMIC fit well
- GC`s fitment is better than i expected, cast quality is much better than OEM or
that first upgrade 10/10
- Oil lines fitment was perfect, rear turbo water return line needed some few millimeters of bending to fit perfect, the line hit turbo chra clamp bolt, it`s possible to rotate it a bit but i decided not to cause it`s paint marked and i wasn`t sure about warranty if i broke that paint seal. 9/10
- Silicone inlets fit quite well, pain in the ass to torque the clamp to turbo cause of short snout this size turbos have but it fit. 9/10
- Hot side fit too, it was more my mistake cause i ordered a 2.5" version of it and vrfs has a 3" on it. hotside is "hitting cooler reservoir hose but space is limited on that position and i raised reservoir by 20mm to get enough space. fitment propably 9/10
- Double barrel shotgun fitment was all most perfect, minor grind from bracket cause
of weld on shotgun bearing house weld hit the bracket, 20 second and issue solved ( Tony has done mods to future bearing houses). 9/10
- Modded fuel rail fit as oem, the shorter high pressure fuel line could be little longer, discussed about it with Tony. 9/10
- Water line rerouting could be better but that`s for sure something every single
installer must concern about them selves , fuel lines is the same, watch that they fit or reroute those to get fitment you are satisfied on. 6/10
huge amount of small pieces is to be checked not to hit anything cause
of very tight engine bay but got everything to fit to a level i`m satisfied on.
End conclusion
My opinion to a perfect assembly time of everything is on some 30 hours to get
a running car with all those mods and to be honest, it`s not men`t for a average guy
to do at home without proper tools or resources.
I own few workshops and tool shop with huge warehouse of bits&pieces
so it`s not ever fair to compare me against average home builder on this
so it can be taught as "unlimited access to everything needed"
I must thank at the end of buildup VTT / Tony for customer service cause there was some issues on bank what caused troubles ( assume my mistake) and we have swapped some 100 emails where half was caused of that bank issue and every time weekend or not, email respond time has been umbelieveble fast ( okay, must undestand there is some 10 hour time zone difference on us).
then the bad news, i got the car running yesterday, not leaks, or other issues, not DME fault codes and then i go got at the same huge
traction issues, nothing to do with power, but to do with 15 cm of wet first snow
of the season what we got here yesterday too.
i will continue thread after i got car on dry tarmac and get it tested on street.
so to keep things short, this is my buildup and goals on DD 2008 AT6 135i
i bought the car some 1 year ago for my wife`s DD winter car in a mistake,
former owner told it`s most dangerous winter car he ever had owned
so it was left for me as a toy.
car has assembled when bought catless downpipes and vrfs race fmic.
there was some tuning software inside too with 0,9 bar boost on it.
then it started to go as usual, first jb4, then turbos with 13T-6 billet compressors,
fuel it stage2 pump upgrade and a tbi with hobb switch. and that was setup for last summer but clipped stock turbine-13T compressor and 24 psi boost didn`t satisfy me cause of concern about exhaust manifold back pressure and mismatch turbine compressor sizing so i decide to do something to the issue.
i want very broad torque curve, driveability, minor impact on lag versus stock,
and some degree of power up in a rev range
I surfed around different forums for some month before i decided to contacted Tony from VTT, even there has been horror story`s about customer care, behavior on internet etc. he seems to be a legend in good and bad and asked his opinion about the build and how to proceed it and he suggested to move straight
from my first plans of GC lites to GC`s
after discussion about it i decided to do some mods to the car, weight reduction to 3070 lbs(done), upgraded turbos, db shotguns,(yes, we have very good quality e85
here aviable all around) cold side and hot side silicons, berk street exhaust and other small bits&pieces.
i started then to order parts from VTT and there was a mess, nothing to do with VTT, a bank issue at most and my deposit went to wrong account and on that it took over a week to resolve it but i was in contact with Tony every day about issue and at first, Tonys respond time for questions was extra ordinary fast every single time, and at the end got it done.
so the mod list is now like this
- VTT GC turbos ceramic coated inside out
- VTT inlets and hot sides
- VRFS race fmic
- charge pipe with raceport BOW
- VTT double barrel shotgun
- BERK street exhaust
- fuel it twin fuel pumps
- XHP stage 3 trans software
- quaife LSD
- crank bolt capture
- split second AIC to db shotgun
- JB4
- Trebila tune to 27psi
- ethanol analyzer
- MHD programming tools
- upraded spark plugs
- n20 tmap
- apex racing wheels
there is for sure something missing but get my point of performance
level i`m after.
then to order and install , issues and pros/cons
everything i ordered came in time,except those wheels i waited for 4,5 month, issue with supplier, exhaust came in time, burger tuning parts came in time VTT parts came in time and only missing parts up to date 1 small hose clamp from VTT order.
- Exhaust fitment was perfect, sound could be more softer to my use, my verdict 9/10
- lfpf fuel pump, not a problems at all, tight fit but everything is like it should be 9/10
- FMIC fit well
- GC`s fitment is better than i expected, cast quality is much better than OEM or
that first upgrade 10/10
- Oil lines fitment was perfect, rear turbo water return line needed some few millimeters of bending to fit perfect, the line hit turbo chra clamp bolt, it`s possible to rotate it a bit but i decided not to cause it`s paint marked and i wasn`t sure about warranty if i broke that paint seal. 9/10
- Silicone inlets fit quite well, pain in the ass to torque the clamp to turbo cause of short snout this size turbos have but it fit. 9/10
- Hot side fit too, it was more my mistake cause i ordered a 2.5" version of it and vrfs has a 3" on it. hotside is "hitting cooler reservoir hose but space is limited on that position and i raised reservoir by 20mm to get enough space. fitment propably 9/10
- Double barrel shotgun fitment was all most perfect, minor grind from bracket cause
of weld on shotgun bearing house weld hit the bracket, 20 second and issue solved ( Tony has done mods to future bearing houses). 9/10
- Modded fuel rail fit as oem, the shorter high pressure fuel line could be little longer, discussed about it with Tony. 9/10
- Water line rerouting could be better but that`s for sure something every single
installer must concern about them selves , fuel lines is the same, watch that they fit or reroute those to get fitment you are satisfied on. 6/10
huge amount of small pieces is to be checked not to hit anything cause
of very tight engine bay but got everything to fit to a level i`m satisfied on.
End conclusion
My opinion to a perfect assembly time of everything is on some 30 hours to get
a running car with all those mods and to be honest, it`s not men`t for a average guy
to do at home without proper tools or resources.
I own few workshops and tool shop with huge warehouse of bits&pieces
so it`s not ever fair to compare me against average home builder on this
so it can be taught as "unlimited access to everything needed"
I must thank at the end of buildup VTT / Tony for customer service cause there was some issues on bank what caused troubles ( assume my mistake) and we have swapped some 100 emails where half was caused of that bank issue and every time weekend or not, email respond time has been umbelieveble fast ( okay, must undestand there is some 10 hour time zone difference on us).
then the bad news, i got the car running yesterday, not leaks, or other issues, not DME fault codes and then i go got at the same huge
traction issues, nothing to do with power, but to do with 15 cm of wet first snow
of the season what we got here yesterday too.
i will continue thread after i got car on dry tarmac and get it tested on street.
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