GOT MY Y BLOCK MAG TODAY


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By aussiebill - 14 Years Ago
I got my Y BLOCK MAG today and see john has all the specs and cost of the new aluminum heads listed. I realise the final testing and elvaluating is still happening on them but good to see them completed, now its time to back up all his work and buy them!. Congratulations for huge effort.
By unibodyboy - 14 Years Ago
For those of us without, could you guys relay the details? Thanks!
By John Mummert - 14 Years Ago
Here are specifications for the new head

SPECIFICATIONS

VALVE SIZES: 1.94" intake     1.54" exhaust   11/32" stem

VALVE MATERIAL: Stainless steel, hard chrome stems, hardened tip.

VALVE LENGTHS:  5.110"

VALVE SPRINGS: Single spring with damper, 1.250" diameter, intalled height 1.750". 110# Seat @ 1.750"    280# @ .500"   Seat pressure 85# with +.050" keepers.

STEEL SPRING CUPS

Hardened keepers with 1 piece steel retainers.

COMBUSTION CHAMBER:  60cc +-

BARE MACHINED CASTING WEIGHT:   24.5#

DECK THICKNESS:  .625"

VALVE GUIDES: Manganese Bronze alloy

STEM SEALS: Positive type



By unibodyboy - 14 Years Ago
Fantastic work John. Could you post the cost information as well?
By LON - 14 Years Ago
John ,

You surely must have reached " Y -Block Legend " status by now .For the amount of work & time you have invested ( let alone the money side ) in creating these heads you deserve the biggest accolade ever .I'm certain ,'people will talk about you in years to come as a true pioneer in Y-Blocks.A job well done .

Lon

PS .Will you be at Columbus this year ??? Hope to see you there .

By John Mummert - 14 Years Ago
Lon, thank you for all the positive comments. I have no doubt that the staff at the asylum will treat me with kindness and the deepest sympathy.
By aussiebill - 14 Years Ago
John Mummert (5/12/2010)
Lon, thank you for all the positive comments. I have no doubt that the staff at the asylum will treat me with kindness and the deepest sympathy.

Ha,Ha! i hope they treat us the same!w00t

By Y block Billy - 14 Years Ago
Great work John! I remember visiting your shop when I was working in cal for a few days and holding a prototype in my hand a couple years ago. Thanks for the persistance and never giving up. It must have been frustrating at times, at least you will be able to meet the people who have been behind you at the assylum. Keep up the great work.

May I ask how many sets were run on this first run, and how many have already been accounted for?