Hello guys
I am about to do a total rebuild of my non matching numbers 1969 2.0T engine (110 HP).
The dependencies of my engine rebuild- I will be reusing the existing 40 Webers (I have read that this will result in less HP than if I used MFI?)
- I already have a set of 2.2S pistons and cylinders waiting to be installed
- It will not be twin-plugged
- I will be using 95 and/or 98 octane pump gas
I have studied the specs. of the different early engines models, 'How to Rebuild and Modify Porsche 911 Engines', 'Porsche 911 Performance Handbook' and last but not least this great forum where especially the 2.0 -> 2.2 update has been discussed several times.
I am considering the following 2 options- 2.0 -> 2.2 upgrade: Using the 2.2S pistons and cylinders, E-cams and changing the heads to 2.2/2.4 heads. That should result in approx. 160 HP, do You agree?
- 2.0 -> 2.4 upgrade: The same application as above but adding a 70,4 mm crankshaft and rods. That should result in approx. 170 HP, do You agree?
However, I still think it's very difficult to estimate the number of HP......there is several aspects to consider: Displacement, compression, cams and finally the fact that it will run Webers.
Further questions 
- What will work best? Heads from a 911T/E or a 911S? As far as I can tell only difference is port size (T/E have I32 & E32 where the S has I36 &E35). I am afraid that to big intake ports could hurt low RPM power so maybe I should go for the T/E heads?
- Would I be better of with the Solex cams?
- What upgrade would You recommend? Is it really worth going the extra mile putting in the 70,4 mm crankshaft and rods?
Regarding the old case I am using, I would like to hear if all of the following mods are neccasary:
- line boring
- oil squirters for the pistons
- TimeCerts/Case savers
- oil bypass
- modern oil pump (maybe from a 3.0)
Any other aspects that I need to consider?
I was hoping that you guys could help me elaborate on this subject.