D16A6 head, port and polish, mill, tune questions.
#1
Honda-Tech Member
Thread Starter
Join Date: Nov 2001
Location: Miami, FL
Posts: 1,992
Likes: 0
Received 0 Likes
on
0 Posts
D16A6 head, port and polish, mill, tune questions.
I am new to D-series motors. I own a 91 Civic Si 140K and bought a completely remanufactured D16A6 head off a machine shop to solve oil burning issues. Being an enthusiast I cant just bolt it on without tinkering with it some. I have thought up of the following list of things to do. I already have a 2.25" side dump exhaust.
1) Streamline bottom turn of intake ports (not match port) just remove minimal material off of the bend on bottom and leave surface gritty for atomization.
2) Streamline and polish the exhaust ports (Same) - remove minimal material.
3) Mill the head .05-.065 to raise compression to 10.5 max (use 93 octane)
4) Maybe Hondata gasket since I have it all apart.
I expect this will feel different even without a tune and new cam. Once the head is on I can later regrind the old cam, install stiffer valve springs and ti retainers, raise redline, OBD1 conversion and tune with Hondata.
Am I on the right track? Is my logic flawed? Any help or suggestions are appreciated.
1) Streamline bottom turn of intake ports (not match port) just remove minimal material off of the bend on bottom and leave surface gritty for atomization.
2) Streamline and polish the exhaust ports (Same) - remove minimal material.
3) Mill the head .05-.065 to raise compression to 10.5 max (use 93 octane)
4) Maybe Hondata gasket since I have it all apart.
I expect this will feel different even without a tune and new cam. Once the head is on I can later regrind the old cam, install stiffer valve springs and ti retainers, raise redline, OBD1 conversion and tune with Hondata.
Am I on the right track? Is my logic flawed? Any help or suggestions are appreciated.
Last edited by AlphaKennyWun; 02-27-2010 at 10:50 AM.
#2
Honda-Tech Member
Join Date: Dec 2005
Location: Thunder Bay, ON, Canada
Posts: 375
Likes: 0
Received 0 Likes
on
0 Posts
Re: D16A6 head, port and polish, mill, tune questions.
Are you sure the oil burning issue was in the head? Old d16a6s are pretty well known for burning oil due to bad piston rings...
Thread
Thread Starter
Forum
Replies
Last Post
new_climber
Honda CRX / EF Civic (1988 - 1991)
11
01-15-2009 07:48 PM