Hi, guys!
My trusty old 930 now really needs an engine overhaul. It’s a -80 Euro car, mostly original. It will be used for street, with about maybe two track days each year. Still it’s just a fun car for the weekends, so no need to think very practical.
I have decided to scrap the the CIS and go for a full EFI system, as I have done with my 911 SC Targa. When the engine is going fully apart, split case etc, I want to take the opportunity to get a fair amount of more hp.
My own thoughts for a build list are as follows:
- Full EFI, with e-gas, knock sensors, ignition etc. Thinking of using the Maxxecu Race, as my engine tuner uses this one.
- Larger fuel pumps.
- Larger oil pump?
- The car already has Fabspeed headers with heat. I guess these will be good enough?
- I have a brand new Turbokraft half bay intercooler sitting on the shelf. Would like to reuse this, if I not absolutely need to go to full bay. Chris has told me it will support 600++ hp.
- I have some doubts about the intake. Ideally I would like to use the original flat intake. Thinking of opening this as much as possible and then matching and flowing the heads. Will I lose a lot compared to for instance an intake from a Carrera 3.2?
- Stronger rods?
- New pistons and CR 8,5:1for better drive ability off boost.
- Thinking about 964 cams, but there could be lots of better choices. I do not mind developing the power a bit higher up the power band, as I am thinking that the increased compression helps a bit when off boost?
- Do I need to twin plug?
- Which turbo do I want?
- Wavetrack LSD. Currently have no LSD.
I will do a full suspension overhaul as well. Is it OK to refresh everything or would you use other parts?
Will be using only 98 RON (equivalent to 93 in the US) fuel. The car will be 90% street used and maybe a track day or two each year. Will want to keep AC and such comforts.
I know that many of you have a lot of experience with 930 engine builds and would very much appreciate input from you.
Here is the car:
