 914/6 Intake Manifold Question |
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| Peeterabytes |
 Mar 16 2024, 07:57 PM
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#1
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Newbie  Group: Members Posts: 15 Joined: 4-August 23 From: DFW Member No.: 27,500 Region Association: None  |
I am in the process of getting my 914/6 back on the road after sitting in my garage for 24 years. Finished the fuel tank, suspension, and brakes rebuild so on to replacing the Webers with some 40mm PMOs. The car has a 911 3.0 SC engine.
The current intake manifolds are 901.108.321 which I believe my father got from a 911s back in the day. Believe those are 32mm ports. I am thinking about replacing them with new PMO intake manifolds but on the PMB website, it suggests 36mm X 40mm or 37mm X 40mm for 3.0 engine. I am thinking the 36mm. Only because I believe that is the intake port size for SC engines. And I’m just looking to make it a fun casual driver, not any crazy performance or worrying about where my peak HP comes in. Asking you experts for advice? Stick with the 32s? Get the 36s? Or? |
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| nditiz1 |
Mar 17 2024, 08:31 PM
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Senior Member Group: Members Posts: 1,191 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region 
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Ports for the 80-83 SC are 34mm, oddly PMO (now EMPI) do not make that one and you have to go with 36mm or open up the 32mm ones. I asked this question regarding my 2.7 and getting intakes and the suggestion was go with 36.
If you want to save money you will be OK with the 32s. There is also the camp that says it helps prevent "blow back" or something like that when gasses want to travel back up that ledge helps prevent it. Either choice it will run well. |
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Posts in this topic
Peeterabytes 914/6 Intake Manifold Question Mar 16 2024, 07:57 PM
flyer86d I would try to match the intake port size. You can... Mar 17 2024, 04:15 AM Luke M My brother has a 3.0 6 in his 914-6 conv. He's... Mar 17 2024, 08:03 AM technicalninja Usually reducing port diameter will increase port ... Mar 17 2024, 09:17 PM
Peeterabytes Thank you all for the replies. I've decided to... Apr 1 2024, 09:38 AM |
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