I finally found a precision machine shop (in New Hampshire) that can do all that I need for my blown stroker motor project and I brought everything to them this past Monday. He did the sonic test first and e-mailed me the results, but I can't really decypher it. He wants me to call him tomorrow morning so we can discuss. So what is the minimum wall thickness I can safely run on this C2AE block?

Thanks,

Rono

  Ron Lane,  Meridian, ID

Ron, Absolute min with blower would be .125. I like at least .188. Ted may want to see more. The ring seal will be more important than the additional displacement.

Frank/Rebop

Bristol, In ( by Elkhart) 

Here is the chart if you csn make it out.

Thanks,

Rono

  Ron Lane,  Meridian, ID

Forgot to mention that the block is already 0.040" over and I think it needs another 0.030" for the stroker pistons.

Rono

  Ron Lane,  Meridian, ID

Afraid I can’t see your posted chart on my end.  With blown applications, my own preference is thicker cylinder walls than I’d run in a normally aspirated situation.  The 0.125" number Frank throws out there would be good if you can keep it there or higher.  Keep in mind that the major and minor thrust sides of the cylinder wall can be used in your favor if there is some variance in cylinder wall thickness occurring.  If your sonic test sheet shows multiple values per quadrant, then pay particular attention to the lowest values.

 

Here the link to a past thread showing a sonic test sheet for a 272 that was bored too much.

http://www.y-blocksforever.com/forums/Topic15189-3-1.aspx 

Lorena, Texas (South of Waco)

Ted, here is the chart he sent. I don't understand the front cover etc. measurements?

Chuck

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

I'm with you chuck...I didn't understand the "timing cover" and "Bellhousing" measurements either. I'll talk more to the shop owner on that, but I'm glad to hear that the thrust side numbers are really good and hardly no core shift. The last sonic test I had done on the motor that is in my 56 now, had the numbers represented on a visual outline of the block with the cylinders so it was much easier to interpret. He is going to magnaflux the block on Monday...stay tuned

Rono

  Ron Lane,  Meridian, ID

RE timing cover and bellhousing, toward front of motor, toward back of motor. Eliminates confusion due to semantics... in theory.


Lawrenceville, GA

Thanks Charlie...that cleared that up easy enough!!

Rono

  Ron Lane,  Meridian, ID

Ron, that block already has some numbers onthe minor faces that concern me for a blown application. .....149 less .020 which is what your .040 overbore would do leaves a .129 wall.

     That's close to what I'd call a minimum. The extreme cylinder pressures created by a blower will actually bow the cylinder walls outward, causing the rings to lose some sealing qualities. I don't think you can offset the bores much in that direction, but Ted or Lonnie may know a trick in that area I'm missing. Ask him, then tell me hoe=w the H--- he does it!    

Frank/Rebop

Bristol, In ( by Elkhart)