Hi guys,
I've searched some info about porting and timing degrees on the forum and I get some info on different threads. But all the informations I get are quite different.
I'm looking for some general port timing info for chainsaws.
In the past years I did a lot of 2stroke motorcycle competition (80 and 125 cc) and did a lot of engine preparation and porting.
When I reed the timings on exhaust and intake on ported chainsaws, I'm surprised how low the values are. For example Ext 142° and Int 111°
On our motorcycle engines we were at about Ext 185° And Int 127° at compression ratios between 1/13,5 - 1/15
Off course these engines are equiped with reed valves and expansion exhaust pipes and were liquid cooled.
Could anyone link me to some threads were I can find some general information or give some general values on chainsaw port timing / compression ratios on air cooled cilinders?
Thanks!
I've searched some info about porting and timing degrees on the forum and I get some info on different threads. But all the informations I get are quite different.
I'm looking for some general port timing info for chainsaws.
In the past years I did a lot of 2stroke motorcycle competition (80 and 125 cc) and did a lot of engine preparation and porting.
When I reed the timings on exhaust and intake on ported chainsaws, I'm surprised how low the values are. For example Ext 142° and Int 111°
On our motorcycle engines we were at about Ext 185° And Int 127° at compression ratios between 1/13,5 - 1/15
Off course these engines are equiped with reed valves and expansion exhaust pipes and were liquid cooled.
Could anyone link me to some threads were I can find some general information or give some general values on chainsaw port timing / compression ratios on air cooled cilinders?
Thanks!