pollished ports (supposedly not all their cracked up to be?)

ed · 10-06-2007, 09:21 PM

smooth, but not shiny

**Mr Revhead** · 11-06-2007, 07:07 AM

thanks guy!
i have learnt something

**Mr Revhead** · 11-06-2007, 07:12 AM

so.... knife edge would be fine for exhaust though wouldnt it?

ed · 11-06-2007, 09:08 AM

yep, a sharp trailing edge is good

**RAd28** · 12-06-2007, 03:10 PM

okay, now that we got the surface finish covered... what should we aim for in terms of port shape?

i'm of the opinion that tapered is best, but can be hard to achieve when you have a valve stem to take into consideration, and a bend (above the valve) that can sometimes choke down. what should we do??

ed · 12-06-2007, 04:12 PM

Originally Posted by RAd28

what should we do??

search, read, search, then read more....

suggest reading the main page here:
http://www.v-eight.com

and some specific articles here:
http://www.v-eight.com/tech_forum/viewtopic.php?t=148
http://www.v-eight.com/tech_forum/viewtopic.php?t=268

and related:
http://www.v-eight.com/tech_forum/viewtopic.php?t=138
http://www.v-eight.com/tech_forum/viewtopic.php?t=22

otherwise just fish through this sub forum:
http://www.v-eight.com/tech_forum/viewforum.php?f=4

**RAd28** · 12-06-2007, 05:42 PM

farkurnell.. you guys don't just modify... you study modifications, then if you have the time you do some modifying

looks like a very worthy read... thanks heaps

**Mr Revhead** · 12-06-2007, 08:25 PM

i dont know weather to + rep u for good info, or - rep you for the headache u just gave me.....

**Mr Revhead** · 12-06-2007, 08:26 PM

oh, is it possible to get this thread FAQed, or at least pointed to in FAQ?
some very good stuff in here that i KNOW i will want to find again!

**RobertoX** · 12-06-2007, 09:38 PM

In your subscribed threads bit you can put a thread in a folder which is useful if you want to find things again. Just click on "subscribed threads" in your usercp thing...

**clubagreenie** · 13-06-2007, 09:30 AM

In terms of early rough surface porting, I remember ( and he still insists it's the best

my old man porting just with the die grinder and finishing with a ball tip. Naking the dimples like a tapered golf ball dimple, tapering towards the chamber. Thing is wether it worked or not they were always clean, never a localised area that looked like fuel was condensing.

Oh and NEVER let Ed near a die grinder or this will result