Hallman MBC and boost tapering - stiffer wastegate actuator
Oct 16, 2005, 11:09 AM
#1
Evolved Member
Thread Starter
iTrader: (4)
Join Date: Sep 2003
Location: Kingdom of Saudi Arabia
Posts: 3,456
Likes: 0
Received 0 Likes
on
0 Posts
Hallman MBC and boost tapering - stiffer wastegate actuator
Just wondering why go to a stiffer wastegate actuator to keep boost from tapering?
The tapering is caused by the "little wastegate reset hole" on the nipple on the mbc.
@moderate boost, the hole is enough to let air bleed out to keep wastegate from opening thus holding boost.
@high boost, the little hole cant keep up the job of bleeding off a lot more air, thus opening the wastegate and boost tapers.
In addition to the little wastegate reset hole, i got a bleed valve T-ed onto the wastegate line and holding 21psi to redline (datalogged with GM map sensor). Keep getting the 0234 code everytime after this little mod.
The tapering is caused by the "little wastegate reset hole" on the nipple on the mbc.
@moderate boost, the hole is enough to let air bleed out to keep wastegate from opening thus holding boost.
@high boost, the little hole cant keep up the job of bleeding off a lot more air, thus opening the wastegate and boost tapers.
In addition to the little wastegate reset hole, i got a bleed valve T-ed onto the wastegate line and holding 21psi to redline (datalogged with GM map sensor). Keep getting the 0234 code everytime after this little mod.
Thread
Thread Starter
Forum
Replies
Last Post
MitsuJoe
Evo Engine / Turbo / Drivetrain
5
Nov 19, 2006 04:21 PM
