Hi What are the differences between a 1800 AN coded engine and a 1800 AP coded engine? How to they get the extra BHP on the Porsche 914 AN coded engine. Is it from the FI, carbs or exhaust? Many thanks. Carl.
I'm sure someone that knows will come along but I'd guess cam, compression ratio from different pistons less restrictive exhaust and a bit more carb Sent from my SM-G960F using Tapatalk
I know the W code 1700 got more power than the bus equivalent, by using dome topped pistons, and FI. So probably something like that.
FI would certainly help but they claim the same BHP with carbs. I don’t know much about the small engines but I think the only differences are the cam and pistons. There are more differences between the 2.0l 914 and 2.0l bus engines.
I would have thought it’s in the Cam timing. Bus needs a different approach to a rather lighter car. Ones a torque job and ones a power job
Yes higher octane to cover higher compression and more power.. Kill it in a bus I expect unless you fit the dished pistons and turn it back into a lower powered engine. Thats from a set of scans that @Valveandy did of some manuals I own. I lent them to him, he scanned them and returned the favour by giving me a copy of the scans.
No, the torque will be virtually identical but the AN will make it at higher revs and hence make more BHP, but for a bus you want the torque at low revs. If you want more torque, make the engine bigger, there is no replacement for displacement.
according to the figures above the an and at have max torque at the same engine rpm with the an being slightly higher
