Heymow - Lawnmower Racing Forum
Engine Help => Briggs Flathead => Topic started by: JGC403 on March 13, 2018, 11:01:31 pm
-
I'm having a difficult time trying to find engine specs on these engines. The specs I'm looking for aren't published or they aren't consistent from different places.
Engine ID 402417 0660 01
Bore: 3.438"
Stroke: 2.156"
intake valve lash: 0.005"
exhaust valve lash: 0.008"
I need:
connecting rod length
compression ratio
Intake and Exhaust valve diameter
Intake and Exhaust valve steam diameter
Stock camshaft specs:
-valve lift
-duration @ 0.050"
-LSA
-degreed centerline
-exhaust port length
I would appreciate any info I can get.
-
Just curious,do you have this engine you want all therse specs on???
-
Yea, haven't torn it apart yet. Most of the information I need i can get once I pull it apart, was just hoping someone already new most of the answers. The camshaft specs will take some time to figure out, but I think I can do it with a degree wheel and dial indicator.
-
If you know how to use a degree wheel you can,but not sure why you need all the stock info
-
I have exhaust header design software. All of the above info is needed for it. I have seen a couple threads on exhaust length and diameter, trying to see how close those are compared to the software.
-
If I remember right,the couple of stock cams I maped out a number of years ago were 225 dur@.050 lift and around .290 lift if not mistaken and LCA was like 114 I think ,this was a 42ci cam