Closed deck block conversion
 

Just wondering a few things about cdb, ive got a 2.5 wrx engine and thinking down the line about upgrades.
1- Are closed deck block inserts available off the shelf or are they made by the companies that do the machine work?
2- if Available to buy does the block require machining to suit? Im guessing it does?
3- Is any work to the bore required after fitting the inserts?
Thanks for any info folks

A 2.5 will need to be machined to cdb it, you can buy a cdb ej20 though and have that as a 2.0/2.1 or you can get a ej22 cdb and have that as a 2.35

Can the inserts be bought or will i need to make those as well?

The machine shop that carries out the cdb application will have them. It is not something you can buy off the shelf as you probably wouldn't have the means to fit it your self. As far as I know. The block is heated and the inserts are chilled after precise measuring and then fitted so when both components come to the same temperature they are super tight

I have got the means to do it myself, thats why i was asking what the process was. When/if i decide in the future to do it i was just looking for a heads up on a proven process as opposed to starting from scratch with trial and error. Dont intend on buying more blocks to test on.

Ring Alyn @ AS Performance.

tbh its not a dear enough machining process to make it worthwhile to do diy-

Tbh if the time comes where its needed i want to do it myself thats all. I figure it would be quite rewarding to do all the machine work and build of my own engine.