Be interesting to see how you compare valve weights (another variable) and springs to each other.

Frank/Rebop

Bristol, In ( by Elkhart) 

Frank.  Thanks for the offer but I’m going to limit this test to the heads already on hand.  I’ve already tested a nicely ported set of 113’s and a variety of differently ported G heads on the dyno mule.  Have just installed a set of ported 471’s on the dyno mule and once those are run, then I’ll be into testing the various smaller valved heads.

 

I’m going to a lot of effort to cc all the heads being used so that the correlation to compression ratio versus power output may also be better defined.  There are already some variables cropping up in this testing that must be sorted through and one of those variables looks to be the valve springs.  That may end up being a test in itself where the same set of heads is ran with both conventional and beehive valve springs to ascertain if that is indeed one of the variables that that is showing up.

Lorena, Texas (South of Waco)

Ted,

          Are you good on the 113's? I've a set from a boat engine that appear to be totally original and uncut.

Frank/Rebop

Bristol, In ( by Elkhart) 

Can we get back to the subject of Y-Block heads?

   God Bless.   Tim                           http://yblockguy.com/

350ci Y-Block FED "Elwood", 301ci Y-Block Unibody LSR "Jake", 312ci Y-Block '58 F-100, 338ci Y-Block powered Model A Tudor

tim@yblockguy.com  Visalia, California    Just west of the Sequoias

Likely, some of the reasons they can operate so cheaply are; The government is a Communist dictatorship, but they allow the minions of industry to operate in a free market as long as they don't oppose the status quo. There are no trade unions. The labour pool is so large that they can effectively pay very low wages, & because of this, unskilled or semi skilled workers have little or no leverage to improve there wages, or working conditions. There are little or no environmental regulations. There is almost no labour safety regulations or workmans compensation. etc, etc.. and N. Americans wonder why we can't compete?.

Paul

And rice is nice !

  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia

apparently child labor is cheap  Carl

Those high shipping costs makes me wonder, how can the chinese buy our scrap steel, ship it to china, melt it down and process it into usable shapes, ship it back to us and sell it cheaper than we can make it here.  I also saw a report of a huge ship, leased to the chinese for such shipping, and it goes one way loaded and back EMPTY!

John - "The Hoosier Hurricane"

Tim.  Great crating job.  Looking forward to receiving the heads and giving them a workout.

---

 

For the time being, the ‘G’ heads being used for the exhaust tests have been removed from the dyno mule and the first set of heads for the cylinder head tests have been installed.  Testing should start sometime next week.  Up to this point, there has already been six sets of heads tested on the dyno mule and that information will also be included in the final cylinder test summary.  All heads are being tested with the same set of headers, intake manifold, and carburetor combination so that specific differences between the heads can be determined without other variables being a factor.  For many of the heads, I’m actually testing with two sets of headers, a set of small tubes and a set of large tubes.  The results from that have thus far been interesting.

 

Much thanks goes to those of you that have helped towards the shipping costs as that seems to be the expensive part of this exercise.  Head and intake gasket sets appear to be inconsequential compared to the shipping costs.

Lorena, Texas (South of Waco)

Heads are on there way!

   God Bless.   Tim                           http://yblockguy.com/

350ci Y-Block FED "Elwood", 301ci Y-Block Unibody LSR "Jake", 312ci Y-Block '58 F-100, 338ci Y-Block powered Model A Tudor

tim@yblockguy.com  Visalia, California    Just west of the Sequoias