got my cyl head back finally, few updated pics
03-13-2007, 06:47 AM
#12
0.0 BAR
Join Date: Dec 2002
Posts: 0
Re: got my cyl head back finally, few updated pics
Originally Posted by random-strike
no matter what pictures, who did it, or how good it actually is, someone will always say that porting sucks.
there must just be something about cylinder head porting and that issue
there must just be something about cylinder head porting and that issue
well when its jagged and the finish is worse than stock then yes Ill bring it up
03-13-2007, 12:01 PM
#16
3.0 BAR
Join Date: May 2005
Posts: 1,811
Re: got my cyl head back finally, few updated pics
I mean this constructively, coming from someone that has done his share of successfull doing porting before... (me)
Those ports look like blaaaaah. At the very least, you need to hit that ---- with an 80, or 120 grit flap wheel sanding disk to get a crosstexture on them, AND to smooth them back out some. How it is, it's ugh.
Secondly, port sizing is the same as anything else. It's a balance of getting the maximum velocity, with the minimum restriction.
Thirdly, you really, REALLY should take the valves out of the head, and polish every combustion chamber. This will negate TWO of the primary causes of pre-ignition.
For the very little effort involved, you really should make those improvements.
Those ports look like blaaaaah. At the very least, you need to hit that ---- with an 80, or 120 grit flap wheel sanding disk to get a crosstexture on them, AND to smooth them back out some. How it is, it's ugh.
Secondly, port sizing is the same as anything else. It's a balance of getting the maximum velocity, with the minimum restriction.
Thirdly, you really, REALLY should take the valves out of the head, and polish every combustion chamber. This will negate TWO of the primary causes of pre-ignition.
- carbon deposites will be greatly reduced (carbon turns white-hot in the combustion chamber)
- heat will intensify on any edge, even the smallest ones
For the very little effort involved, you really should make those improvements.
03-13-2007, 05:37 PM
#19
3.0 BAR
Join Date: Dec 2002
Posts: 3,830
Re: got my cyl head back finally, few updated pics
I dont know the first thing about what a port should look like, but it looks freakin badass all nice and cleaned up. 
The one thing I do like about the head is the quench of the chamber; and those intake ports are freakin huge. The only thing I ever see in person is D and B heads, so go figure.
I cant wait to see what your build does once it all comes together. Hope all the parts like each other and make a good system.
The one thing I do like about the head is the quench of the chamber; and those intake ports are freakin huge. The only thing I ever see in person is D and B heads, so go figure.
I cant wait to see what your build does once it all comes together. Hope all the parts like each other and make a good system.
03-13-2007, 05:51 PM
#20
0.0 BAR
Join Date: Feb 2007
Posts: 24
Re: got my cyl head back finally, few updated pics
i strongly strongly agree with Toysrme. those def need to be hit with a sand roll. and polishin the combustion chamber never hurts. other than that it looks good but the job just needs to be finished
