o and io engines

It appears the 200 HP injected engines all have tuned induction systems
for a little more power, too. And isn't here some point where they use
the angle valve cylinders to get a better combustion chamber shape? I
couldn't spot it though.

An interesting list. Think of the documentation there must be at
Lycoming to support this many certified engines!

On 6 May 2006 11:35:19 -0700, "nrp" wrote:

It appears the 200 HP injected engines all have tuned induction systems
for a little more power, too. And isn't here some point where they use
the angle valve cylinders to get a better combustion chamber shape? I
couldn't spot it though.

A 180 hp O-360 Lycoming has parallel valves, the 200 hp IO-360 has
angle valves. With the 540's the typical cut-off for parallel valve
heads is 250 hp.

An interesting list. Think of the documentation there must be at
Lycoming to support this many certified engines!

Indeed.

TC

wrote:
: A 180 hp O-360 Lycoming has parallel valves, the 200 hp IO-360 has
: angle valves. With the 540's the typical cut-off for parallel valve
: heads is 250 hp.

I believe that the angle-valves have *larger* valves too. IIRC, there does exist an IO-360 model that is only
180hp though... parallel-valve fuel-injected?

-Cory

--

************************************************** ***********************
* Cory Papenfuss, Ph.D., PPSEL-IA *
* Electrical Engineering *
* Virginia Polytechnic Institute and State University *
************************************************** ***********************

wrote:

A 180 hp O-360 Lycoming has parallel valves, the 200 hp IO-360 has
angle valves. With the 540's the typical cut-off for parallel valve
heads is 250 hp.

O540-E4B5, which is 260 HP has parallel valves. I think 300 HP is
where the angled valves start in the 540.