4 Cylinder Inline Engine

[Mrben144]

Ray,
Thanks for taking the time to post your stuff, always interesting to look at. Have you ever seen the way Stihl operates two valves on one lobe?

 

[rdean]

Thanks Chris and Mrben it is appreciated.
Yes I have briefly looked the Stihl setup.

Ray

 

[rdean]

The good news first.
I made a mount for my distributor and coupled it to the cam via 2 bevel gears.
It tracks and turns smoothly.




Now the bad news.
I was spinning the engine over with my drill and noticed a problem. Around 3000 rpms the flywheel was not tracking straight. When I slowed down it ran fairly true again so I believe I need center crank bearing to make it more rigid. In the beginning I said the crank was an experiment and it has proven to be a failure for me.
I will start on a new crank in a couple of days.

Thanks for looking
Ray

 

[Boswell]

sorry to hear that you have to redo the crank but such is the nature of one-off builds like this. The distributer looks great by the way.

 

[rogerl]

Ray:
It looks like you have room to put a center bearing for the crankshaft. It might be easier to do that than make a new crankshaft.


Roger L

 

[Tom1948]

Are those gears delrin?

 

[rdean]

Thanks for the encouragement and kind words.
I will be putting a center bearing in the crank and will disassemble it completely as I found some other areas I didn't like.
The gears are plastic and come from McMasterCarr but I don't know what they are made of.
Ray

 

[Chris Hamel]

I like your distributor mount. It should be easy to adjust the timing.

 

[rdean]

Tom the gears are made of Nylon I looked it up.
Chris yes the mount should work fine.

Ray

 

[Tom1948]

Okay, I thought you made them.