Hi all, I've just bought a 1380 which has pockets on the pistons. What manufacturers made these types? as I can't seem to find much info. I presume they are for forced induction.
Pistons With Pockets?
Started by
blacktulip
, Jul 23 2017 10:30 PM
3 replies to this topic
#1
Posted 23 July 2017 - 10:30 PM
#2
Posted 23 July 2017 - 10:55 PM
what do you mean by pockets? cut out for Valves?
quite a few can be machined as such.
makers info is normally easily visible on them.
#3
Posted 23 July 2017 - 11:53 PM
I couldn't see any stamped markings at first glance. Maybe I will post a picture. They have 2 pockets machined on the top of each piston, one being bigger than the other which look like clearance for valves. On tdc the pistons come proud of the deck by a few thou. Being a 1380 it must have had a big cr unless the head used had big chambers.
#4
Posted 24 July 2017 - 12:01 AM
dont forget dish CC.
most pistons can take a fair bit of machining.
maybe the builder was just being save for any over rev situations. as it tends to be the valves that come out worse on the 5 port. been there done that. thanks "quick Shift" still have pistons and rods for another build.
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