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Offie engine

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  • Member since
    November 2009
  • From: Twin Cities of Minnesota
Offie engine
Posted by Don Stauffer on Friday, November 1, 2019 9:20 AM

I had started this scratch built 1:8 scale 270 ci Offie over a year ago, but it had been on the shelf for awhile.  At our local area contest in September, the local car club offered a special award for best car engine.  This made me think- hey, I should finish that Offie model.  Here is how it looks today after a minor cleanup of a couple of the parts.

This is a non-operating static model- I know some people have built working models but I don't yet have the skills- especially foundry work- for that.

Most of the major parts are wood, with a little bit of plastic and metal here and there.

It is well over half done- mostly need assembly now.  The exhaust stack and coolant manifolds, however, have not been started yet and those will be major efforts.

 

Don Stauffer in Minnesota

  • Member since
    July 2008
  • From: Albany, NY
Posted by jeffpez on Friday, November 1, 2019 9:48 AM

A great and ambitious project. Very Impressive. I loved the old Indy roadsters before the rear engine cars showed up. 

  • Member since
    April 2003
  • From: USA
Posted by keavdog on Friday, November 1, 2019 1:46 PM

That's cool Don.  You know when you finish it you're going to have to put it in a sprint car!

Thanks,

John

Ain't no reason to hang my head, I could wake up in the mornin' dead 

  • Member since
    November 2009
  • From: Twin Cities of Minnesota
Posted by Don Stauffer on Friday, November 1, 2019 4:31 PM

keavdog

That's cool Don.  You know when you finish it you're going to have to put it in a sprint car!

 

Too big!

I have another less ambitious offie for a 1/12 sprint car I am working on, and another for a 1/12 midget, that the 110 ci version.  Hope to get to work again soon on the midget.

 

Don Stauffer in Minnesota

  • Member since
    November 2009
  • From: Twin Cities of Minnesota
Posted by Don Stauffer on Wednesday, November 6, 2019 10:35 AM

Got some more work done.  Polished aluminun Alclad on cam covers, mounted same, and nose engine support.  The magneto is just setting on its mount- have more work to do in it before I mount it.   I have the engine sitting on its wood display mounting, but need to do more work on that, later.

 

 

Don Stauffer in Minnesota

  • Member since
    March 2012
  • From: Corpus Christi, Tx
Posted by mustang1989 on Wednesday, November 6, 2019 12:17 PM

Very interesting project. Looks really good so far Don.

Is there any wiring or detail pieces going on this one? 

                   

 

  • Member since
    November 2009
  • From: Twin Cities of Minnesota
Posted by Don Stauffer on Thursday, November 7, 2019 8:27 AM

mustang1989

Very interesting project. Looks really good so far Don.

Is there any wiring or detail pieces going on this one? 

 

Oh, yes.  Ignition wiring, fuel plumbing, and fittings for water and oil but no hoses for same.

 

Don Stauffer in Minnesota

  • Member since
    March 2015
  • From: Close to Chicago
Posted by JohnnyK on Saturday, November 30, 2019 7:54 PM

WOW!! That's really cool! How did you make the fins?

  • Member since
    November 2009
  • From: Twin Cities of Minnesota
Posted by Don Stauffer on Sunday, December 1, 2019 10:37 AM

JohnnyK

WOW!! That's really cool! How did you make the fins?

 

I started with the basic plates of 30 mil styrene, then laid down strips of 80 mil by 20 mil, alternating one flat, one standing up.  Then laid 20 x 80 around edges to level everything. On left side I cut pieces of 20 mil to fit around crankcase breather pipes, and pieced those on on fins in that area.

Had a big setback recently.  I found I had made the crankcase too long by about 90 mil, and the head hold-down rods would not engage with fitting on head.  Had to saw off bell-housing and in-out box with my band saw, and sand on disk sander the back of crankcase.  Got it all sanded and filled now, and about to glue the two pieces back together.  Pics soon. 

 

Don Stauffer in Minnesota

  • Member since
    March 2012
  • From: Corpus Christi, Tx
Posted by mustang1989 on Sunday, December 1, 2019 12:13 PM

Hate it when that kinda stuff happens. Looking forward to the recovery efforts Don.

                   

 

  • Member since
    March 2015
  • From: Close to Chicago
Posted by JohnnyK on Sunday, December 1, 2019 6:22 PM

Don Stauffer

 

 
JohnnyK

WOW!! That's really cool! How did you make the fins?

 

 

 

I started with the basic plates of 30 mil styrene, then laid down strips of 80 mil by 20 mil, alternating one flat, one standing up.  Then laid 20 x 80 around edges to level everything. On left side I cut pieces of 20 mil to fit around crankcase breather pipes, and pieced those on on fins in that area. 

OMG Bow Down

  • Member since
    January 2003
  • From: Washington State
Posted by leemitcheltree on Sunday, December 8, 2019 1:56 PM

Dang!! That looks GREAT!

Cheers, LeeTree
Remember, Safety Fast!!!

  • Member since
    November 2009
  • From: Twin Cities of Minnesota
Posted by Don Stauffer on Monday, December 9, 2019 3:38 PM

Got the bell housing and in-out box back on engine.  Got the back of the block repainted.  That was a job because the rest of the cylinder block was a mixed color and I had to mix it again the match.  When I took the tape off, a bit of the iron color on the in-out box came off, and still touching that up.

Working on the mag now.  Also started cutting out the exhaust manifold.  That will be done from a sheet of three eighth's basswood with some small pieces glued on.  I think that manifold will be the hardest part of the whole project.  It will have to be perfect, because I intend to Alclad it and then ghost on some red and blue burned areas.

 

Don Stauffer in Minnesota

  • Member since
    November 2009
  • From: Twin Cities of Minnesota
Posted by Don Stauffer on Wednesday, December 11, 2019 10:17 AM

Okay, here is the picture.  The model is now about a tenth of an inch shorter.  Still blemish on the in-out box, still working on it, another coat of paint.

Don Stauffer in Minnesota

  • Member since
    November 2009
  • From: Twin Cities of Minnesota
Posted by Don Stauffer on Thursday, December 26, 2019 9:03 AM

More problems.  The plastic cap I used for the in-out box just will not hold paint :-(  I am scraping it and will do a new one, maybe a bit more accurate too.  Filling of the scar on the back of the crankcase has become more effort than I anticipated too.  I am putting it up on my shelf of doom for awhile while I do a simpler project (new Revell sprint car).

 

Don Stauffer in Minnesota

  • Member since
    March 2012
  • From: Corpus Christi, Tx
Posted by mustang1989 on Saturday, January 4, 2020 6:38 AM

Been there.....done that. My Arado 234 build took 3 friggin' years because of this same kind of stuff. Sorry you're having so many issues with this one Don. Looking forward to more progress when you get back to it.

                   

 

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