This is a scan from Y-Block magazine. Hope it helps. Chuck in NH

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

Nice scan - talk about real eye candy!

Daniel Jessup

Lancaster, California

aka "The Hot Rod Reverend"
check out the 1955 Ford Fairlane build at www.hotrodreverend.com

thats pretty slick.

i dig the Mummert name in script too!



Made in USA to boot!

This ain't no L-Kamino!

Any idea if there is enough material in the combustion chamber to enlarge them with a CNC mill so they will be suitable for supercharging or turbocharging?

If the engine is completely computer controlled it should be able to run boost with the higher compression, right?

Lawrenceville, GA

Computer control when done properly can potentially net you an additional point in compression over a distributor and carburetor initiated tuneup.  But the learning curve can be expensive as far as mapping an optimum or even safe curve when starting with too many unknowns.  Unfortunately in many instances you don’t know where the edge is until you’ve gone over it as evidenced by the amount of 4.6 Ford mod motor stuff I get in the shop as a result of over the edge mapping.  And much of this originates from running the compression ratio on the high or ragged side when turbocharging or supercharging.  I’m still an advocate of lower compression ratios in conjuction with higher boost pressures instead of higher compression ratios and lower boost pressures.

 

As far as machining the combustion chambers larger, I’ll pose this to John as he’s the one that will know this.  With a CNC program, the whole of the combustion chamber could possibly be machined which can potentially net a significant increase in combustion chamber cc’s without going very deep into the material.

Lorena, Texas (South of Waco)

Ted,



Just a point of curiosity:



Are you familiar with the type of tooling/procedures used by FoMoCo factory/foundry in the 50s? I have to wonder why there was so much variation in my ECZ-G chamber volumes (3 CCs +) between cylinders on the same head. Was the final machining done in Cleveland, or were they delivered to Dearborn as raw castings? Unless done freehand, it is hard to imagine that even 50s era automated equipment could be that imprecise?

6 VOLTS/POS. GRD. NW INDIANA

I had a chance to talk with John last week. He says he thinks the chambers can be enlarged and it is actually something he plans on looking into. He wants to get some of these as-cast heads sold first so it may be a year or two before we know. Exciting!


Lawrenceville, GA