Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Vortec 350 Build
View Single Post
  #16 (permalink)  
Old 04-20-2012, 12:57 PM
Silver Surfer's Avatar
Silver Surfer Silver Surfer is offline
More machine than man
 

Last journal entry: bwaahhaahahaaahhaa
Last photo:
Join Date: Jul 2005
Location: Kansas City, MO
Age: 37
Posts: 816
Wiki Edits: 0

Thanks: 100
Thanked 63 Times in 53 Posts
Assuming you will keep the OEM 4.000" bore. Here are the numbers I come up with

bore: 4.000"
stroke: 3.48"
Head vol: 68cc
Piston dish: 10cc
Squish band*: .050"
CR: 9.12:1

* Squish band = deck clearance (which is about .025" using 1.560" compression height pistons) + head gasket compressed thickness.

Here are the pistons: http://www.summitracing.com/parts/SLP-H423ACP/
These are a manageable $15.95 a piece.
Keep in mind these are 1.540" compression height. OEM is 1.560" and these numbers are going to factor into your deck height especially since you are not decking.

Another option would be these
http://www.summitracing.com/parts/SLP-WH423NP/
at $20.99 a piece. And they are a compression height of 1.550"

Looks like Summit offers pistons with a compression height of 1.562", but these get into the $40 range. So if you are going to be a stickler about squish and cost and stuff you might be cheaper to get the block decked and throw reduced compression height pistons, assuming YOU do the tear down and assembly of the block. A machine shop will charge you extra for that labor.
Reply With Quote