A4 1.8T with 034 stage 3 - T3/T4 57 trim - Unitronics BT
#1
AudiWorld Senior Member
Thread Starter
A4 1.8T with 034 stage 3 - T3/T4 57 trim - Unitronics BT
My friend bought a 97 A4 with 1.8T.
Available info:
034 motorsports Stage 3 turbo kit
Garrett T3/T4 57trim turbo
3"Stainless steel downpipe
3" exhaust with 12" vibrant resonator
Custom FMIC
Forge 004 BOV
Boostvalve MBC
Unitronics 440 Big turbo software
Delphi 440cc injectors
Innovate Wideband AFR gauge
I drove the car yesterday: nice power - FROM 4500 rpm on, NO drop all the way up.
NOTHING (literally, not even 5 psi) under 4000 rpm.
a) To be expected from 57 trim?
b) Assume .63 A/R (considering the behavior)
c) To get SOME low/mid power: change to smaller turbine. What is likly the current wheel? 57? 54?
d) If A/R is 0.63, how much will .48 help?
Looks like the stock FR is installed (I think 4 bar is stock).
Wideband showed no lower than 13. Assuming this is true: way to lean, or?
I noticed a 'pop' from the exhaust. Misfire? Friend says it happens quite a bit.
I appreciate your input/thoughts/suggestions how to give him some mid range power (even at the expense of top end power), and a 'save' setup.
Available info:
034 motorsports Stage 3 turbo kit
Garrett T3/T4 57trim turbo
3"Stainless steel downpipe
3" exhaust with 12" vibrant resonator
Custom FMIC
Forge 004 BOV
Boostvalve MBC
Unitronics 440 Big turbo software
Delphi 440cc injectors
Innovate Wideband AFR gauge
I drove the car yesterday: nice power - FROM 4500 rpm on, NO drop all the way up.
NOTHING (literally, not even 5 psi) under 4000 rpm.
a) To be expected from 57 trim?
b) Assume .63 A/R (considering the behavior)
c) To get SOME low/mid power: change to smaller turbine. What is likly the current wheel? 57? 54?
d) If A/R is 0.63, how much will .48 help?
Looks like the stock FR is installed (I think 4 bar is stock).
Wideband showed no lower than 13. Assuming this is true: way to lean, or?
I noticed a 'pop' from the exhaust. Misfire? Friend says it happens quite a bit.
I appreciate your input/thoughts/suggestions how to give him some mid range power (even at the expense of top end power), and a 'save' setup.
#2
AudiWorld Senior Member
Thread Starter
Turbo inlet 6 inch above ground
Aside from driveability issue(some like it 'peaky'), I also noticed the turbo inlet
- has no filter or screen
- sits at best 6 inches above ground
Is that safe? It seems to me it is sucking dust, sand, snow, water mist (or worst case: pure water in a anything deeper than 4 inches) like Hoover on steroids.
I can't believe 034 Motorsport designed it this way.
What can be done to make it safe?
- has no filter or screen
- sits at best 6 inches above ground
Is that safe? It seems to me it is sucking dust, sand, snow, water mist (or worst case: pure water in a anything deeper than 4 inches) like Hoover on steroids.
I can't believe 034 Motorsport designed it this way.
What can be done to make it safe?
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