What did you do to your 991 turbo today?
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vrybad (07-20-2021)
#3182
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Measured my wheel run-out.
LF:
Axial ~0.1 mm
Radial ~0.2 mm
RF:
Axial <0.1 mm
Radial <0.2 mm
LR:
Axial ~0.2 mm
Radial ~0.1 mm
RR:
Axial ~0.2 mm
Radial ~0.4 mm
Right rear took a hit a while back. Not as bad as the one on the last page. Tomorrow, I'll pull a new rear out of its box and measure it for S&Gs, but the old LR needs some work.
LF:
Axial ~0.1 mm
Radial ~0.2 mm
RF:
Axial <0.1 mm
Radial <0.2 mm
LR:
Axial ~0.2 mm
Radial ~0.1 mm
RR:
Axial ~0.2 mm
Radial ~0.4 mm
Right rear took a hit a while back. Not as bad as the one on the last page. Tomorrow, I'll pull a new rear out of its box and measure it for S&Gs, but the old LR needs some work.
Last edited by worf928; 07-25-2021 at 11:53 PM. Reason: Two lefts.
#3185
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Semi-quick fix on my Turbo... On Saturday, I lost most of my boost. Any significant amount of throttle would result in a 'whooshing' sound from the rear and a maximum of .2 bars of boost. On my 996 Turbo, a quick boost pressure check would be the first thing I did, but not so easy on a 991 unless you buy a couple of hundred dollars worth of lower boost hoses and immediately cut them in half so you can clamp in test plugs.
At any rate, a thorough visual inspection was done and @Beezupra spotted the culprit, the hose connecting the y-pipe to the throttle body had become partially loose on the bottom side and was loosened, re-seated, and torqued.
Ultimately, seems like it a relatively easy fix, though some re-assembly is now required!
At any rate, a thorough visual inspection was done and @Beezupra spotted the culprit, the hose connecting the y-pipe to the throttle body had become partially loose on the bottom side and was loosened, re-seated, and torqued.
Ultimately, seems like it a relatively easy fix, though some re-assembly is now required!
#3186
Rennlist Member
Semi-quick fix on my Turbo... On Saturday, I lost most of my boost. Any significant amount of throttle would result in a 'whooshing' sound from the rear and a maximum of .2 bars of boost. On my 996 Turbo, a quick boost pressure check would be the first thing I did, but not so easy on a 991 unless you buy a couple of hundred dollars worth of lower boost hoses and immediately cut them in half so you can clamp in test plugs.
At any rate, a thorough visual inspection was done and @Beezupra spotted the culprit, the hose connecting the y-pipe to the throttle body had become partially loose on the bottom side and was loosened, re-seated, and torqued.
Ultimately, seems like it a relatively easy fix, though some re-assembly is now required!
At any rate, a thorough visual inspection was done and @Beezupra spotted the culprit, the hose connecting the y-pipe to the throttle body had become partially loose on the bottom side and was loosened, re-seated, and torqued.
Ultimately, seems like it a relatively easy fix, though some re-assembly is now required!
A
#3187
Rennlist Member
On my 996 Turbo, I would have gone straight to pressurized boost leak testing, but it doesn't seem like there is a good way of doing that on the 991 Turbo without buying a spare set of lower intercooler hoses and cutting them up so I could fit test plugs.
#3188
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For the 991.1 Turbo, it looks like it is 997-110-647-74, "Distributor Sleeve". About $150 at OE parts discounters...
Different part number for the 991.2 Turbo, which I'm assuming isn't just an upgrade, but a completely different part.
Different part number for the 991.2 Turbo, which I'm assuming isn't just an upgrade, but a completely different part.
Last edited by pfbz; 07-20-2021 at 02:30 PM.
#3189
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One would think it would be the same part, what does it look like on the 991.2?
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Porsche did a substantial update. 2019 is what you want. It's thicker, longer so it fits more firmly and has better clamps. I will try to take a side by side pic next time.
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#3191
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But will the .2 part will fit on the .1 plumbing??
The .2 part is actually less expensive. 991-110-677-71, about $76 discounted, but is not listed as a part that supersedes 997-110-647-74. But I'm all in if it fits...
This is the newer part. 991-110-677-71:
...and the part listed for the 991.1, which did go from a .71 to a .74. 997-110-647-74. I should go see if I can see what rev the one on my car is.
They sure do look interchangeable, but it is odd that Porsche still lists the old part as a current part for 991.1 and hasn't superseded it with the new one. They usually are pretty good about that...
The .2 part is actually less expensive. 991-110-677-71, about $76 discounted, but is not listed as a part that supersedes 997-110-647-74. But I'm all in if it fits...
This is the newer part. 991-110-677-71:
...and the part listed for the 991.1, which did go from a .71 to a .74. 997-110-647-74. I should go see if I can see what rev the one on my car is.
They sure do look interchangeable, but it is odd that Porsche still lists the old part as a current part for 991.1 and hasn't superseded it with the new one. They usually are pretty good about that...
Last edited by pfbz; 07-20-2021 at 03:11 PM.
#3192
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New skins, BABY!!!!
#3193
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Last edited by ottodawg; 07-20-2021 at 03:26 PM.
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r00t61 (07-20-2021)
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#3195
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Yes. I just added that to my post. It's a little tighter, so I ended up just pulling the Y pipe to make it easier. Couldn't figure out a way to squeeze it between the Y pipe & TB without messing up the clamps.
https://rennlist.com/forums/991-turb...o-boost-3.html
https://rennlist.com/forums/991-turb...o-boost-3.html
Last edited by ottodawg; 07-20-2021 at 03:38 PM.