Porting the S5 waste gate - do the door also..
08-10-04, 09:41 AM
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Porting the S5 waste gate - do the door also..
Trimming the back side of the flapper door arm allows it to open almost 1/8" wider.
Last edited by SureShot; 08-10-04 at 09:45 AM.
08-10-04, 10:03 AM
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Nice...
I thought about doing the same thing to my BNR when i got it, but at that time, i was getting the friggin Haltech figured out, the motor back in the car, the battery to the back, and I didn't need another headache, so i figured the 35mm port and flap that bryan put in will just have to do, but the door doesn't appear to open very far before hitting the wall.
I thought about doing the same thing to my BNR when i got it, but at that time, i was getting the friggin Haltech figured out, the motor back in the car, the battery to the back, and I didn't need another headache, so i figured the 35mm port and flap that bryan put in will just have to do, but the door doesn't appear to open very far before hitting the wall.
08-10-04, 10:50 AM
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I roughed it in with a 4-1/2" angle grinder, then finished it with a file.
The trick is protecting the housing to back plate sealing surface.
With the MBC bypassed, boost is 5-6-6-6-6 flat.
The trick is protecting the housing to back plate sealing surface.
With the MBC bypassed, boost is 5-6-6-6-6 flat.
Last edited by SureShot; 08-10-04 at 10:53 AM.
08-10-04, 11:05 AM
#4
Haven't we ALL heard this
Originally Posted by SureShot
I roughed it in with a 4-1/2" angle grinder, then finished it with a file.
The trick is protecting the housing to back plate sealing surface.
With the MBC bypassed, boost is 5-6-6-6-6 flat.
The trick is protecting the housing to back plate sealing surface.
With the MBC bypassed, boost is 5-6-6-6-6 flat.
How would triming the the top of the flapper door comprimise the sealing surface? I am not sure what you are talking about.
James
08-10-04, 11:22 AM
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Originally Posted by Wankel7
How would triming the the top of the flapper door comprimise the sealing surface? I am not sure what you are talking about.
James
James
With no gasket there - one nick & you've got a leak.
The second picture shows the clearance.
08-10-04, 08:19 PM
#6
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I don't think it's necessary, and it compromises the strength of the wastegate flapper.
Have you ever seen one crack into pieces?
I have.
Just by porting the wastegate passages, we've gotten an H-trim hybrid to boost only 2.5psi!
-Ted
Have you ever seen one crack into pieces?
I have.
Just by porting the wastegate passages, we've gotten an H-trim hybrid to boost only 2.5psi!
-Ted
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08-11-04, 09:11 AM
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Completely stock: 5-6-7-7-7
Gutted cats: 6-9-11-11-11
Ported waste gate & flapper clearanced: 5-6-6-6-6
Stock boost control removed, MBC in line: 9-10-11-11-11
I found another picture:
Gutted cats: 6-9-11-11-11
Ported waste gate & flapper clearanced: 5-6-6-6-6
Stock boost control removed, MBC in line: 9-10-11-11-11
I found another picture:
Last edited by SureShot; 08-11-04 at 09:20 AM.
10-22-04, 04:21 PM
#9
Haven't we ALL heard this
I also cut a little metal away from the back plate. Not much....but maybe 1/32" of metal. Put a little grease on the wastegate flapper and just ground away some metal where the grease marks were on the back plate.
James
James
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