Thanks Thanks:  0
Likes Likes:  0
Page 6 of 7 FirstFirst 1234567 LastLast
Results 51 to 60 of 70

Thread: Jippe's wetback 10

  1. #51
    Team Member zul8tr's Avatar
    Join Date
    Oct 2008
    Location
    Orlando, Fla
    Posts
    509
    Post Thanks / Like

    Default engine work

    Jippe

    Please excuse my forwardness but by some of your questions it appears that some of your mechanic skills are lacking. Here are some questions and basics

    What exactly are you grinding with the dremel?

    Ring gap is measured with the ring removed from the piston and placed in the cylinder at the top then the bottom of the stroke in the same orientation as the ring would be on the piston and with a feeler gage measure the gap in the ring end.

    If you go with oversize pistons the cylinderes must be bored to fit the pistons with the proper clearance between piston and cylindere wall. This is very critical and boring and honing must be done by a knowledgable machinest to get the proper clearance.

    The sharp edges on the ports are normal per the factory but some rounding is ok if properly done with a dingle berry hone.

    Power reeds can be obtained from Boysen, just google them.

  2. #52
    Team Member
    Join Date
    Aug 2009
    Location
    Finland
    Posts
    45
    Post Thanks / Like

    Default

    Only thing what is lacking is my english writing skills
    I'm mechanist, working with elevators, installing and repairing them.
    I don't have milling machine, turning machine etc. but I have know-how to use those and many more.
    With dremel on exhaust side I polish all channels and remove bumps/uneven spots what cast left. On intake side do also polishing, edges rounding and some material removing.
    I can't explain this any further so pics are coming later

    Boyesen dont have 302 reeds, I buy material local and make them myself.

  3. #53
    Team Member
    Join Date
    Aug 2009
    Location
    Finland
    Posts
    45
    Post Thanks / Like

    Default

    Pictures 1
    Attached Images Attached Images

  4. #54
    Team Member
    Join Date
    Aug 2009
    Location
    Finland
    Posts
    45
    Post Thanks / Like

    Default

    Pictures 2
    Attached Images Attached Images

  5. #55
    Team Member
    Join Date
    Aug 2009
    Location
    Finland
    Posts
    45
    Post Thanks / Like

    Default

    Pictures 3
    Attached Images Attached Images

  6. #56
    Team Member
    Join Date
    Aug 2009
    Location
    Finland
    Posts
    45
    Post Thanks / Like

    Default

    As you can see, theres lot of work for dremel

  7. #57
    Team Member
    Join Date
    Aug 2009
    Location
    Finland
    Posts
    45
    Post Thanks / Like

    Default

    Measured piston rings gaps and they are 0.5-0.6 depending on spot of cylinder.
    I took one ring off and put it to cylinders different spots and measures with feeler gauge, is that procedure ok? I used upper piston ring and that same to all measurement.

  8. #58
    Team Member zul8tr's Avatar
    Join Date
    Oct 2008
    Location
    Orlando, Fla
    Posts
    509
    Post Thanks / Like

    Default ring end gap

    Your procedure is as I described several post ago. Just make sure the ring in the cylindere is at 90 degrees to the cylindere wall. This is easily done with the piston (without rings) placed in the cylindere inserting from the head at the top and tap the ring into position at 90 degrees to the cylindere wall. Oil cylindere wall before doing this.

    The ring end gap of 0.5 to 0.6mm is in spec. Max gap for replacement is 0.8mm per manual.

    While at it check cylinderes for wear at several locations near top. mid and near the bottom of the stroke. Per manual maximum cylindere diameter for 302 is 2.602" and minimum piston diameter is 2.595" measeured at skirt on thrust side and 9/16" above bottom of piston.

  9. #59
    Team Member
    Join Date
    Aug 2009
    Location
    Finland
    Posts
    45
    Post Thanks / Like

    Default

    Quote Originally Posted by zul8tr View Post
    Per manual maximum cylindere diameter for 302 is 2.602" and minimum piston diameter is 2.595" measeured at skirt on thrust side and 9/16" above bottom of piston.
    Pistons diameters are 65.6mm (2,5827") top and 65.8 (2,5906")bottom (both same)
    Cylinders diameters are 65.95 (2,5965")top and bottom (both same)

  10. #60
    Team Member
    Join Date
    Aug 2009
    Location
    Finland
    Posts
    45
    Post Thanks / Like

    Default

    Where you guys buying yamato gaskets and other spare parts?

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Butts Aerowing-The Only Way To Fly
    By Master Oil Racing Team in forum Boat Racing Encyclopedia
    Replies: 217
    Last Post: 04-11-2022, 09:39 AM
  2. Chris Chamberlain's Wetback
    By Ron Hill in forum Boat Racing Encyclopedia
    Replies: 52
    Last Post: 07-18-2013, 03:10 AM
  3. Hal Kelly Wetback
    By JohnsonM50 in forum Boat Racing Encyclopedia
    Replies: 3
    Last Post: 12-28-2005, 03:32 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •