 914/6 Intake Manifold Question |
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| Peeterabytes |
 Mar 16 2024, 07:57 PM
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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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| flyer86d |
Mar 17 2024, 04:15 AM
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#2
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Member Group: Members Posts: 429 Joined: 12-January 11 From: Corea, Maine Member No.: 12,585 Region Association: North East States |
I would try to match the intake port size. You can do that by buying the new manifolds or you can enlarge the 32 mm outlets of your manifolds to match the heads. I did this on the 2.7 that I built for my 68 911 which has 35 mm ports.
Charlie |
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Posts in this topic
Peeterabytes 914/6 Intake Manifold Question Mar 16 2024, 07:57 PM
Luke M My brother has a 3.0 6 in his 914-6 conv. He's... Mar 17 2024, 08:03 AM nditiz1 Ports for the 80-83 SC are 34mm, oddly PMO (now EM... Mar 17 2024, 08:31 PM 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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