10-12-2010, 07:42 PM #1
4 tec Ported Heads, Lightened cams/flywheels/balancers
I did this Machine work before i owned my GPRXP for my friend James (powerslave) I ported and polished the cylinder head. At the time i didnt have a setup to bench flow test my port work, but i am almost done with the setup to do so now. He supplied me with Les Cooke Titanium Retainers, OEM New Valve Springs, Ferrea SS valves. I cut a 5 angle Valve job, machined the deck surface flat, and assembled the head. Let me know what you guys think!
Last edited by Slow 91; 03-29-2012 at 09:26 AM.
10-12-2010, 07:47 PM #2
I cut a 5 angle Valve job
What the point, every one is making 3 angle Valve job
10-12-2010, 07:49 PM #3
Looks really good man! that's coming up on my wish list.
10-12-2010, 07:49 PM #4
i meant a 3 angle valve job. I have never seen gains above that, that made it worth doing. Although some people swear by 5 angle.
10-12-2010, 11:05 PM #5
- Join Date
- Aug 2009
- Discovery Bay, CA
looks good. maybe because its all shiny and pretty but looks like you opened that exhaust up quite a bit!!
10-12-2010, 11:27 PM #6
Now if you can just get that log to flow downstream you will be set. Or is their a header in the near future.
10-13-2010, 05:44 AM #7
10-13-2010, 06:17 AM #8
- Join Date
- Oct 2005
10-13-2010, 07:16 AM #9
Nice Nice, what method did you use to clean the sealing surface of the head so well?
10-13-2010, 08:20 AM #10
the cylinder head was slightly warped ( .002") Being a Multi-Layer Steel headgasket and the motor would be making alot more power than factory i didnt take any chances and Milled the cylinder head on my surfacing machine. I went really slow milling it to give it a very "smooth" finish. Im really itching to port some more heads. I had a run this summer of 18 cylinder heads for Acura Integra GSR's, Mitsubishi Evo's, 08 Mustang GT 4.6l heads, and a ton of other applications. I just upgraded alot of my shop porting equipment right after that big run of heads so im dying to try this new stuff out.
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By roost5o in forum Yamaha Old School SkisReplies: 2Last Post: 06-19-2008, 08:36 PM
By king of kings in forum Sea Doo Open DiscussionReplies: 6Last Post: 12-17-2007, 08:35 AM
By GTXX in forum 4-Tec PerformanceReplies: 7Last Post: 03-06-2006, 11:38 AM
By Green Hulk in forum 4-Tec PerformanceReplies: 18Last Post: 05-21-2005, 07:41 PM
By Green Hulk in forum 4-Tec PerformanceReplies: 17Last Post: 05-13-2005, 08:00 AM