Originally Posted by auchenberg (Post 11626509)

Update on the project: Ended up being a complete rebuild of the engine

Went with:
- 964 Cams
- 98mm Mahle kit 3.4L conversion
- ARK Hardware
- Single plug
- Motronic with Custom Steve Wong Chip
- 3.2 Enlarged Throttle Body Conversion https://www.911chips.com/engine.htm
- 991 GT3 Muffler
- Custom headers from Rarelyl8. See https://forums.pelicanparts.com/porsche-911-technical-forum/1076156-project-997-991-gt3-exhaust-911-3-2-a.html
- Renovated alternator fan
- New fuel lines
- New oil lines
- New oil pump
- Chain Tensioner Update
- Wevo Semi solid engine mounts

Originally Posted by mikedsilva (Post 11626579)

Interesting, I'm doing a similar build but am using a 964 crank.
Did you upgrade your fuel injectors to do the conversion to 3.4? Is it considered necessary?

Originally Posted by auchenberg (Post 11627170)

No, keep stock. I should say that I'm doing this renovation together with my mechanic, so I have a helping hand on side here.

Originally Posted by Tremelune (Post 11627670)

I hate seeing gorgeous engines because I'm usually happy with my dirty one...

Can you talk about more about the 991 GT3 exhaust decision? How does it compare in terms of noise and weight compared to stock? I have a 3.0 lying around that I'll need a muffler for...I was going to use a stock Bischoff, but the idea of having a switchable quiet/loud muffler instead of a not-too-loud muffler is compelling. I was gonna get SSIs, but it seems your headers are on the custom side...?

Originally Posted by auchenberg (Post 11391195)

Hi all,

I'm having my engine rebuild on my 1987 911 Targa, as after 106k miles I had excessive oil consumption. It was supposed to be a top-end rebuild, but now that we have dropped the engine, it's evolving into a full rebuild due to leaking main 8# bearing, worn valves, worn cylinder heads, and worn Alusil cylinders + pistons.

I want to keep the car reasonably stock since it's a Targa and a daily driver, but if I anyway will be I'll be in the market for a new cylinder+piston set, I'm currently trying to decide whether I should keep the engine stock 3.2 with a set of Nickies, or I should bite the bullet and go the 3.4L conversion with the Mahle kit?

The car will be fitted with a 997 GT3 muffler + rarelyl8 long tubed heat exchangers, so there should be plenty of air.

My options:

Option 1: Keep motronic + single plug + Steve Wong chip + 964 cams + ARP hardware + AASCO springs + 95mm Nickies with EU/ROW compression

Option 2: Keep motronic + single plug + Steve Wong chip + 964 cams + ARP hardware + AASCO springs + 98mm Mahle kit 3.4L conversion

What would you do and why?

I appreciate your input!

/k