Way back in 1912, a man named Charles Kettering invented the first ever electric self-starter. It was a new-fangled engine starter that made it easy for car owners back then to start their horseless carriages. He probably didn’t know it then but as his invention signaled the end to hand cranking engines, it also opened up a world of new possibilities. That is why today, there are keyless starters. That’s enough about the starter and where its story started. What matters today is how your starter works and how its condition can affect your Porsche’s overall performance. That’s exactly where the size of your performance starter comes into the picture. Read on to learn why it is such a big deal.
Nearly all Porsche starters today look the same. However, there are slight differences that are worth noticing. The nose cone is one such difference. Unless you have an old starter that still uses three bolts and is attached to the bell housing, there are basically two main nose cones that you should know about. If your car is fitted with a 12 ¾ inch flywheel complete with 153 teeth, the starter nose cone will have two separate attachment bolt holes across each other. These two holes must always be parallel to the crankshaft. So if your Porsche uses a 14inch flywheel, the attachment bolt holes will be offset or diagonal. This fitment applies to both automatic and manual Porsche models.
Just like OE starter bolts, OEM performance starter bolts have specific shank diameters as well as knurling. The dimensions go a long way to position the starter and to keep it from moving or shaking when torque is applied.
Small Size Performance Starters
They are sometimes referred to as mini starters. That’s because they are of a small size. What makes them unique though is how they can save the say when clearance is significantly reduced because of wide oil pans or exhaust headers. Note that if you are swapping a bigger Porsche engine into a smaller Porsche model, space saving performance starters stand out as your only logical option. This simply means everything boils down to size if you want the performance starter to power the engine after swapping.
Wiring between the starter and the battery is just as important as size and dimension issues already explained. So if for one reason or another your Porsche OEM starter has issues, make sure a weakened cranking power caused by faulty or compromised electrical wiring is not the issue. Note too that starter motors have a heavy draw. To cater for their energy needs, a separate cable is designated. It runs from the battery all the way to the starter. It is insulated with thick rubber with copper wiring inside it. Despite the insulation though, it still corrodes. It also develops resistance with time. The resistance prevents normal electric flow, which is a problem that can plague the performance starter. To avoid this, take your car for scheduled inspection at least twice every three months.