Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #1  
Old 07-11-2019, 12:52 PM
Ragtop Man's Avatar
Ragtop Man Ragtop Man is offline
Ultimate Warrior
 
Join Date: Sep 2010
Posts: 1,241
Default 421 question: Cost to machine recess to lower compression?

(looking at you, Bart Orleans!)

I have a line on a set of (8) 4.125 / 4.000 stroke Ross forged pistons that came out of a very low-time '65 421 build. My block could easily take the .032 overbore, and would like to keep the stock 4" stroke.

Issue: The pistons are flat tops, which means only a pair of notches for valve clearance, and a static CR way too high for -092 /-093 heads if zero decked.

If you have done this, what is a typical cost for the setup and cut from a reputable shop? Or does that compromise the piston strength/durability?

Thanks!

 


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:37 AM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017