My 914-6 is in paint and it is decision time for the engine build. I have the original engine on the shelf, and will probably not touch it for now. I have a 65 aluminum case that has been opened to 90mm and has the MFI pedestal studs added. My thought was to build either a 2.3 or a 2.5 short stroke MFI on the 66mm crank. However, I am missing the P and Cs and the heads, and I'm not sure how much "operating" room in the engine compartment I would lose with MFI. My easier option is to start with a decent running 2.2 T that I have and consider stroking to a 70.4 crank, adding 2.2 S P and Cs, and swapping out the cams for E cams or possibly S cams (or maybe something in the middle). This would give me a very satisfactory 2.4 S spec engine with a slightly higher cr due to the 2.2 S pistons. I have all of the parts to build this. The valves T-S are 46/40 so those are fine. My questions relate to the ports. Porting the heads to S specs 36/35 will give me better flow (especially with the higher cr 2.2 S pistons. How much should porting cost...and/or is it worth it to make a template and do it myself? What will I gain by increasing the port sizes from T to S specs. I will probably run a pair of Weber IDAs that I just rebuilt.
Not trying to do the engine build on the cheap...but there is something to be said for keeping rebuild costs within reason by using what I already own.
Suggestions are appreciated.
