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spastrone spastrone is offline
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Join Date: Jan 2011
Location: Santa Cruz, CA
Posts: 21
1971 911T 2.2L -> 2.4L Rebuild: 2024 Specs

Hello All,
Old topic, new question...maybe...

I am embarking on a 2.2L to 2.4L rebuild (old topic) and am planning to basically follow Wayne Dempsey's advise on page 112 of "How To Rebuild And Modify Porsche 911 Engines" where he specs the following:
- Case: 2.2
- Crank: 2.4/2.7 (70.4mm)
- Pistons: E
- Cylinders: 2.2 (84mm)
- Cam: E
- Fuel: Carbs or MFI (Still deciding between using my Zeniths or going with "Webers"
- Heads: 2.2

I don't want to go beyond this because I don't want to push the magnesium cases, or double plug due to > 10:1 compression, or loose the low end torque, compared to something like an "S" build. The goal is an excellent build that will have good to great performance and longevity for a daily driver / canyon cruiser.

Now, to the "new question"...
In 2024, 20+ years since the publishing of Wayne's book, what additional knowledge, in this forum and beyond, has coalesced about the quintessential (ultimate) 2.2->2.4 rebuild (without going insane on $$$), given both, tried and true practices, as well as new materials / technology that has come about since then?

I know there will be some debate about certain fringe aspects of this topic, which I fully appreciate and can sort through, but I am really looking for the consensus views, here. Ideally, a list of the obvious as well as the more minor, yet important, mods will come of this. Perhaps it already exists!

Thanks very much in advance. I know this is a very worn out topic, but I hope this will still peak some interest from the vast knowledge base here.

Scott
Old 09-18-2024, 11:43 AM
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