Machining Pistons to run 20v head... And FCR's on a 20v?
09-11-2013, 07:17 PM
Post: #1
Machining Pistons to run 20v head... And FCR's on a 20v?
Anyone up on this?

I might be running a 20v head on my 16v, is pocketing a high comp 16v forged piston to take the 5th valve something that can be done?

Also, anyone ran FCR's on a 20v head? This head has no VVti to worry about, so my current FCR's should theoretically go on with a new inlet manifold and a Dizzy relocation kit.. Right?

Ta!

Driftworks - JSPFab.com - DangerStyle - NightSpirit
Find all posts by this user
09-15-2013, 01:08 AM
Post: #2
Machining Pistons to run 20v head... And FCR's on a 20v?
[Image: AEU86 AE86 - Machining Pistons to run 20... on a 20v?]

Quote:At the time I built this engine no one did decomped 5 valve pistons,
so I bought some Arias forged and then custom flycut the pistons
myself on a mill to suit the ST head, I then blended the valve pockets
so there were no nasty sharp edges, then balanced the whole assembly.
One Aussi did this when building a 20V turbo engine, so I guess it is
possible. Might pay to get an old 16V piston and drill a few holes to see
how much meat there is in the dome where you need to cut... and
measure the valve to piston clearances very carefully.

Cheers... jondee86
Find all posts by this user


Possibly Related Threads...
Thread Author Replies Views Last Post
  82mm Stock compression Pistons apardal 4 2,671 11-24-2021 04:26 PM
Last Post: apardal
  Where to run the factory antenna cable andyling 2 3,508 09-30-2020 12:31 PM
Last Post: andyling
  Small Port 10.3 Pistons Alex170984 1 4,281 10-25-2016 09:18 PM
Last Post: oldeskewltoy
  How to install 20V ITB on 16V head Mr.komp 7 11,521 12-28-2015 05:35 PM
Last Post: pack
  20v block with 16v head and internals possible? ditn 3 6,869 08-12-2014 09:19 PM
Last Post: ditn

Forum Jump:


User(s) browsing this thread: 1 Guest(s)

Contact Us | AEU86 | Return to Top | Return to Content | Lite (Archive) Mode | RSS Syndication