MY98 / VF34 / boost problems
27 October 2007, 10:58 PM
#1
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MY98 / VF34 / boost problems
Hello
i drive a MY 98 EDM Impreza
with following mods
header stock
IHI VF 34 boost 1.2 bar peak
Apexi AVC-R
downpipe decat
midpipe stock
endpipe Remus Racingline
ECU Stock with FCD
FSE Fuelpressure Regulator 3,6 bar without vaccum
injector 380 IDC max 85%
Induction without resonator
the problem are
the boost drops by ca. 5500 RPM
from 1.2 bar until 0,7 bar @ 6800 RPM
when i drive with 1.0 bar boost the drops comes later by ca. 6300 RPM
What can cause this problem
thanks for answers
www.impreza-cup.ch
i drive a MY 98 EDM Impreza
with following mods
header stock
IHI VF 34 boost 1.2 bar peak
Apexi AVC-R
downpipe decat
midpipe stock
endpipe Remus Racingline
ECU Stock with FCD
FSE Fuelpressure Regulator 3,6 bar without vaccum
injector 380 IDC max 85%
Induction without resonator
the problem are
the boost drops by ca. 5500 RPM
from 1.2 bar until 0,7 bar @ 6800 RPM
when i drive with 1.0 bar boost the drops comes later by ca. 6300 RPM
What can cause this problem
thanks for answers
www.impreza-cup.ch
28 October 2007, 10:54 AM
#2
Scooby Regular
Well I've had a VF35 on a MY98 and it had no problems holding boost at high revs. Therefore it's most likely something in the boost control with the EVC-R.
85% IDC seems low on 380 injectors with 1.2 bar from a VF34, although I could be wrong.
85% IDC seems low on 380 injectors with 1.2 bar from a VF34, although I could be wrong.
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