Intake manifolds
Thread Starter
|
Registered User
Joined: Dec 2015
Posts: 438
From: Jacksonville, FL
Rep Power: 53
Intake manifolds
What's the deal with these blocked cross-tube ports on the stock composite intake manifolds??
From what I'm reading, these intake manifolds are unique to our 996tt. There is even a prominent part number displayed on the plug. 996 110 217 OR
I have seen no discussions of putting a cross-tube in it's place. I am relatively new to the forum, but I have searched here and the rest of the internet and not found much of anything worth reading. I have no idea if it would even do anything, but after reading that the common intake manifold upgrades don't do much; it made me wonder more about this. It's there for a reason right???
Maybe a cross tube only helps on N/A engines. IDK. I also don't know enough about the consequences of increasing the intake manifold's volume, which is basically what I'm talking about here.
The plugged ports on the tt manifold are exactly planar with the stock plenum, therefore the tube length would be right around 8.25", the same length as the plenum. The diameter appears to be slightly smaller, by about 1/2".
If these manifolds are unique to our cars, why would Porsche go to the trouble of making them more complicated by adding the ports to both the left and right manifold and then make another part (cast aluminum in this case) just to plug the ports? We all know they left a lot on the table. What are the chances this is an Easter egg for us?
I am sure I'm not the first person to notice this. Thoughts??
From what I'm reading, these intake manifolds are unique to our 996tt. There is even a prominent part number displayed on the plug. 996 110 217 OR
I have seen no discussions of putting a cross-tube in it's place. I am relatively new to the forum, but I have searched here and the rest of the internet and not found much of anything worth reading. I have no idea if it would even do anything, but after reading that the common intake manifold upgrades don't do much; it made me wonder more about this. It's there for a reason right???
Maybe a cross tube only helps on N/A engines. IDK. I also don't know enough about the consequences of increasing the intake manifold's volume, which is basically what I'm talking about here.
The plugged ports on the tt manifold are exactly planar with the stock plenum, therefore the tube length would be right around 8.25", the same length as the plenum. The diameter appears to be slightly smaller, by about 1/2".
If these manifolds are unique to our cars, why would Porsche go to the trouble of making them more complicated by adding the ports to both the left and right manifold and then make another part (cast aluminum in this case) just to plug the ports? We all know they left a lot on the table. What are the chances this is an Easter egg for us?
I am sure I'm not the first person to notice this. Thoughts??
Last edited by Stebo; Jun 20, 2017 at 07:53 AM.
Registered User
Joined: Jun 2017
Posts: 18
From: Houston, TX
Rep Power: 0
What's the deal with these blocked cross-tube ports on the stock composite intake manifolds??
Attachment 478621
From what I'm reading, these intake manifolds are unique to our 996tt. There is even a prominent part number displayed on the plug. 996 110 217 OR
Attachment 478622
I have seen no discussions of putting a cross-tube in it's place. I am relatively new to the forum, but I have searched here and the rest of the internet and not found much of anything worth reading. I have no idea if it would even do anything, but after reading that the common intake manifold upgrades don't do much; it made me wonder more about this. It's there for a reason right???
Maybe a cross tube only helps on N/A engines. IDK. I also don't know enough about the consequences of increasing the intake manifold's volume, which is basically what I'm talking about here.
The plugged ports on the tt manifold are exactly planar with the stock plenum, therefore the tube length would be right around 8.25", the same length as the plenum. The diameter appears to be slightly smaller, by about 1/2".
If these manifolds are unique to our cars, why would Porsche go to the trouble of making them more complicated by adding the ports to both the left and right manifold and then make another part (cast aluminum in this case) just to plug the ports? We all know they left a lot on the table. What are the chances this is an Easter egg for us?
I am sure I'm not the first person to notice this. Thoughts??
Attachment 478621
From what I'm reading, these intake manifolds are unique to our 996tt. There is even a prominent part number displayed on the plug. 996 110 217 OR
Attachment 478622
I have seen no discussions of putting a cross-tube in it's place. I am relatively new to the forum, but I have searched here and the rest of the internet and not found much of anything worth reading. I have no idea if it would even do anything, but after reading that the common intake manifold upgrades don't do much; it made me wonder more about this. It's there for a reason right???
Maybe a cross tube only helps on N/A engines. IDK. I also don't know enough about the consequences of increasing the intake manifold's volume, which is basically what I'm talking about here.
The plugged ports on the tt manifold are exactly planar with the stock plenum, therefore the tube length would be right around 8.25", the same length as the plenum. The diameter appears to be slightly smaller, by about 1/2".
If these manifolds are unique to our cars, why would Porsche go to the trouble of making them more complicated by adding the ports to both the left and right manifold and then make another part (cast aluminum in this case) just to plug the ports? We all know they left a lot on the table. What are the chances this is an Easter egg for us?
I am sure I'm not the first person to notice this. Thoughts??
Registered User
Joined: Mar 2011
Posts: 456
Rep Power: 71
It provides support yes, but it wasn't designed for support - that would make no sense.
I believe that it's a carry over from the 993/964 manifold and was where the resonance valve is located.
[img]webkit-fake-url://fc9820b6-bfff-4947-b956-0b510708e0cc/imagejpeg[/img]
there is also a metal version, that I know someone on this forumn has used on the 996.
I believe that it's a carry over from the 993/964 manifold and was where the resonance valve is located.
[img]webkit-fake-url://fc9820b6-bfff-4947-b956-0b510708e0cc/imagejpeg[/img]
there is also a metal version, that I know someone on this forumn has used on the 996.
Registered User
Joined: Jun 2007
Posts: 610
From: germany
Rep Power: 64
It provides support yes, but it wasn't designed for support - that would make no sense.
I believe that it's a carry over from the 993/964 manifold and was where the resonance valve is located.
[img]webkit-fake-url://fc9820b6-bfff-4947-b956-0b510708e0cc/imagejpeg[/img]
there is also a metal version, that I know someone on this forumn has used on the 996.
I believe that it's a carry over from the 993/964 manifold and was where the resonance valve is located.
[img]webkit-fake-url://fc9820b6-bfff-4947-b956-0b510708e0cc/imagejpeg[/img]
there is also a metal version, that I know someone on this forumn has used on the 996.
a good solution should be a ipd plenum and a resonance valve between the banks..but realy no need at the actual power levels