Roller cam engine

[nels]

When was the roller cam engine introduced in the 201 and how can you tell a roller cam engine from the flat tappet version? Are there different variations of the roller cam engine through the 201 years?

[Guest]

Just now, nels said:

When was the roller cam engine introduced in the 201 and how can you tell a roller cam engine from the flat tappet version? Are there different variations of the roller cam engine through the 201 years?

Generally the serial number will end in "E"

Clarence

[carusoam]

And Byron installed one a while ago.  See his thoughts on it...

best regards,

-a-

[KSMooniac]

It was never "introduced" in the 201 line as production ended in 1998.  Factory overhaul/reman/exchange engines will likely have the roller cam mod if done within the last 5 (?) years.  I'm not sure when Lycoming released it.

[jetdriven]

For most models, 2005.  Mine has shown high iron content and a generally crappy response from Lycoming, but once We bumped the timing to 25 degrees like the type certificate says, it's been a good performer.  Curiously, cnoe's 1978 dual mag flat tappet engine'd  201 blows it away on takeoff and climb.  

[bradp]

Does the roller tappet version address any of the deficiencies in the valve train design, specifically the suboptimal oil flow to the rocker arms / valve guides?

[jetdriven]

the oil pressure is set much higher, that helps.