Wastegate Porting... Is this enough?
#1
Wastegate Porting... Is this enough?
Getting my car back together; the last real hurdle is porting the wastegate. With regards to the side in which the flapper opens into, is this adequate? It seems to let the door open a slight bit more, but this is my first wastegate porting and I don't want to tear into it again Please excuse my dremel work, I am a novice... (note the OH $#&% mark on the gasket mating surface... )
Another Angle
Other Side, which was performed by a machine shop btw
Another Angle
Other Side, which was performed by a machine shop btw
#3
I guess I'm wondering if people got away with just porting the wastegate and doing little to nothing to where the flapper contacts the housing.
#4
2 FD's since '98
iTrader: (11)
I remember the key area being where the flapper seats. That is the only thing I enlarged to get 15psi dead nuts with no creep. 3" to 3.75 cat back. I did not waste my time with the rest of the casting, just made the seat as large as possible with out the flapper falling through.
#5
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I remember the key area being where the flapper seats. That is the only thing I enlarged to get 15psi dead nuts with no creep. 3" to 3.75 cat back. I did not waste my time with the rest of the casting, just made the seat as large as possible with out the flapper falling through.
#6
Thanks for the replies,
The overlap for the flapper to housing is likely 0.75 +/- 0.25 mm, as far as I can tell.
Machine shop worked by the roughly same instructions: measured diameter of flapper door, located center of flapper door when in closed position, then went to town. There is the smallest hint of light coming through the port nearby the hinge, but not enough to worry me.
The overlap for the flapper to housing is likely 0.75 +/- 0.25 mm, as far as I can tell.
Machine shop worked by the roughly same instructions: measured diameter of flapper door, located center of flapper door when in closed position, then went to town. There is the smallest hint of light coming through the port nearby the hinge, but not enough to worry me.
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#9
My previous turbo housing had a crack in the exact same spot, near the hinge going toward the turbine. Must be a thermal fatigue zone or a weakness inherent to the casting process (improper use of risers, etc); I'm not a casting engineer (it's almost an art) so I can't accurately speculate.