The DareDevil

I wish I had a better camera on me for this snapshot! Thought I would share:



And while I have your attention...

(Hypothetical situation) If I bore out the cylinders of my 2.5 n/a to 3.0, can I install S2 pistons and what other modifications would be required?

apierce918

can the 2.5 block even be bored out that far? im gonna go out on a limb and say it will require further modifications.

The DareDevil

Didn't think about that. I assumed that all the blocks (2.5, 2.7, 3.0) were the same and that they were bored out to different degrees.

The DareDevil

Searching through older posts.

https://rennlist.com/forums/924-931-944-951-968-forum/145755-3-0-stroker.html

https://rennlist.com/forums/924-931-944-951-968-forum/103958-2-5-to-a-2-8-a.html

https://rennlist.com/forums/924-931-944-951-968-forum/92037-stroking-a-944-a.html

https://rennlist.com/forums/924-931-944-951-968-forum/49762-building-late-2-5-8v-into-3-0-liter-maybe.html

FSAEracer03

Diminishing returns? The work required to bore out a 2.5l, recoat, install pistons, etc... would cost you more than buying a stonger 3.0l motor from an S2.

The DareDevil

That may definitely be the easier route.

Zero10

The 3.0L cylinders are much larger. Take a look at pictures of the 2.5L and the 3.0L blocks, and you will see. The 3.0L cylinders are so big that they are siamesed at the bottoms.

My 944 has more snow on it than yours does

The DareDevil

Hmmm... Guess I'll have to go back to my original plan and turbo charge it.

Just kidding!

Looks like the best bet is to swap the crank and connecting rods to get 2.8liters.

Enviroteacher924S

Nice picture though! Kind of fun. Have a fanTABulous day - Jaime

Zero10

Yup, can go to a 2.8L stroker, but I don't know of anybody who makes special N/A pistons for the purpose, so you would have to go with the Carillo rods. With the turbo, there is a set of pistons you can buy if you really want to use your stock rods.
Then of course you would need to re-map the ECU, and you might start to max out the AFM, so it could require going to a MAF.

Swagger93

I like how you think.

The DareDevil

If I was worried about diminishing returns, I wouldn't have bought a Porsche!

It’s a labor of love. You should know that!

Having said that, I do have my eyes on an S2. *fingers crossed*

The DareDevil

Thank you!