400 block question?
#5
Junior Member
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Join Date: Dec 2007
Posts: 1
Sonic Testing
Here is a brief article explaining what Sonic Testing is.
http://racingarticles.com/article_racing-73.html
http://racingarticles.com/article_racing-73.html
#6
Senior Member
EXPERT BUILDER
Join Date: Nov 2003
Location: NORTHEAST
Posts: 290
Originally Posted by fla1976
One way to know is to have it sonic tested.
Look it over close
#8
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Join Date: Nov 2008
Posts: 9
i heard that that some shops drill the steam holes, thread them and plug them,to prevent cracking in this area, for drag race use. any experiences with this? i believe that a 509 block is one of the stronger 400 blocks. i have one in my garage now that is a two bolt block that has been studded,line bored, and filled to the bottom of the frost plugs.
#9
Senior Member
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Join Date: Jan 2004
Location: central Illinois
Posts: 459
400
To see what is required to add life to the head deck of a 400, you may want to check out the old Bill Jenkins smallblock chevy engine building book.
It details how to drill, tap, and plug the steam holes. It also shows to add plugs with holes in them to the big water holes in the deck and mods to other water holes.
I followed this once and the 400 block lived 7 full seasons of drag racing. It eventually cracked from a head bolt hole to the bore. Rest in Peace.
It details how to drill, tap, and plug the steam holes. It also shows to add plugs with holes in them to the big water holes in the deck and mods to other water holes.
I followed this once and the 400 block lived 7 full seasons of drag racing. It eventually cracked from a head bolt hole to the bore. Rest in Peace.