Ported 853s or Stock 317s For My 6.0
04-29-2007, 12:00 PM
#3
Registered User
iTrader: (15)
Join Date: Aug 2005
Location: BTR, La
Posts: 1,363
Likes: 0
Received 0 Likes
on
0 Posts
Those 853s will get your compression up, and you'll still have good valve-to-piston clearance. The last 317s I ported were milled .030" by the guy they belonged to. I measured them with a burette and they came out to a 68cc chamber. A stock LS1 head would make more compression than that (65-66.67cc chamber) AND still maintain stock PTV clearance.
I suggest the ported 853s depending on who did the work on them. With some good work, they can be made to flow really well. I would just run ported LS1 heads and a big cam if I were to build a 6.0L motor.
(Disclaimer; those 317s were supposed to be milled .030", but I think it might have only been around .020"- regardless they were milled for compression and still would make less than a stock LS1 head.)
Ben T.
I suggest the ported 853s depending on who did the work on them. With some good work, they can be made to flow really well. I would just run ported LS1 heads and a big cam if I were to build a 6.0L motor.
(Disclaimer; those 317s were supposed to be milled .030", but I think it might have only been around .020"- regardless they were milled for compression and still would make less than a stock LS1 head.)
Ben T.
Last edited by Studytime; 04-29-2007 at 12:45 PM.
05-02-2007, 02:26 PM
#4
TECH Enthusiast
iTrader: (42)
Join Date: Mar 2006
Location: Gettysburg, PA
Posts: 725
Likes: 0
Received 0 Likes
on
0 Posts
ive got a set of unported 853's I was considering doing a little play porting on a puting on a flowbench just to see how I did, if you want them I might just end up selling them and you could send them out to be ported. (one rocker stud has a heli-coil in it) sure it will hold but I took them off becasue of it, and i wanted 243's.
