Y-Block Guys! Don't waste your time and money on ECZ-G heads

If you mean ECZ-G heads the stock valves (1.92") are bigger than what I am using in these. (1.85")

 

Not even into Y blocks and this is a great thread!

 

Fantastic work!

 

Have my first Y block- so thanks for starting the education.

 

Mctim64 thanks yes my heads are ECZ-G can you put a larger valve in them. I am not looking to make a rump thump motor just a little more HP. Mostly looking for good reliability plan to drive a lot when done.

 

You can put a bigger valve in them but it will not do what you want it to do. The bigger valve, say 2.02", will be closer to the edge of the combustion camber and will "shroud" the valve and really take you in the oposite direction that you want to go. What I do with ECZ-Gs is clean out the bowls and run 1.94" +.200" chebbie valves. That will do you a lot more good than going bigger. These heads have there limits to valve size as do all heads, bigger isn't always better.

 

I have ECZ-C heads, are they the same? Can you do this type work on a standard milling machine? Mine is a Millrite with a 1 H.P. motor and an 8"x36" table. Where do you get the cutters?

 

ECZ-C heads have 1.78" intakes and a different combution chamber (73cc) but I have cut them for 1.92"/1.94" before. I would say yes to doing them on a standard mill, it's all how you hold the work piece and how well you center your cutter. The cutters on this machine are special by Serdi and Newen, we buy them direct, they will only fit the tooling for these machines though.

 

thanks tim you are the y-block man and thanks for the tips you grave me on my y-block

 

And to think we used to do that will a bunch of stones, and a lot of dust. Nice tech.

 

Thanks for the info !
do you know what the final compression ratio will be?
aslo what cam do you plan to use

 

Brilliant thread - thank you.

 

Tim. Great piece of tech. Keep up the good work.

 

With a .060" over 292 (3.810") and zero deck hieght the cylinder volume is 601cc per. Chamber volume with .030" milled off is approx. 67cc + 10cc for the head gasket. 601/77= 7.81 7.81:1 with comp gasket, with a steel gasket 8.2:1

The cam I will keep to myself at least till I see how it performs.

 

Thanks Ted. That means a lot coming from you.

 

cool thanks

 

say tim, have you ever done any linc. y-block heads. can you put offset guides in to bring the valves closer to gether?

 

I don't play with the Lincoln Y very much but I do have a compleat engine that one day I hope to get into.

 

What about port matching the intake after milling the heads?
Be careful as the top corners on the intake ports are very narrow on
the "big heads" and aftermarket intakes.

 

You can also do this by making your own intake gaskets out of thinner gasket matierial.

 

I will be sending a set of these head off to Ted Eaton to run on his "Dyno Mule" so we can have some idea of how they stack up aginst the "G" heads. Stay tuned!

 

Here's a link to Ted's cylinder head test, these heads are the C1TE-D heads before and after milling. I think this shows that with these mods the "old truck heads" messure up well aginst the stock "G" heads and even the first ported ones. The top rated "Gs" on the graph are the old "Yellow Brick" heads and they do out perform the C1TE heads so I will be swaping them onto the Uni at Bonneville after a couple of runs with the C1TEs. 30 more HP I'll take any day.

http://www.y-blocksforever.com/forums/Topic61587-3-1.aspx

 

Real world results are in. Jake the LSR Unibody ran three back to back runs at Bonneville with these heads and topped 120 mph on a fairly stock +.060" 292 bottom. In all fairness the ECZ-G heads did a bit better with a best pass of 127 but 120 isn't too bad for heads that most guys throw away. The "G" heads were race prepaired too BTW.

 

This has been a great thread-the work is really impressive (and anything that enhances a "Y" always intriques me). But, when you compute C.R. I think you should add the chamber volume to the cylinder volume THEN divide by chamber volume. The compression ratio is the ratio of the TOTAL volume in the cylinder with the piston at the bottom to the remaining volume when the piston is at the top (chamber + gasket volume). I think you have more like 8.81 with the thick gasket. (601+77) / 77 = 8.805.

 

You are absolutely right! I think I was a little sleepy when I wrote that.

 

You know what I love about the old motors is that they were so simple and yet after much less R&D than Ford puts into the modern one they are putting out very similar numbers...this is by far the best tech I have read about the y-block heads...

 

Nice to read about an alternative to the ECZ-G for street use. Gonna put this one away in the "for later" file.

Thanks for the great thread, McTim!