Porting specifics, porting transition from runner?
#1
Boosted 7
Thread Starter
Porting specifics, porting transition from runner?
Hey guys, just doing some practice porting on some old junk irons and i have a few questions. First of all this is just the rough cut, only using a carbide bit, i still have alot of stone grinding and sanding. I want to know if i should smooth out the coner transition from the runner to the port as indicated in the pic, and also if i should smooth out the roof out the outer edge. for my first port i think its turning out ok, I was amazed at just how fast you can port with an air die grinder and a double cut carbide bit. and its my understanding that I shouldn't change the size of the runner, is this true?
Thanks, Matt
Thanks, Matt
#2
Hunting Skylines
Join Date: Apr 2001
Location: Brisbane, Queensland, Australia.
Posts: 3,431
Likes: 0
Received 2 Likes
on
2 Posts
You should pay just as much attention to the port runners as you do to the port opening itself. Having a whopping big port and small runners really hurts flow. Ideally they should have the same cross sectional area. I paid particular attention to the opening edge of the port and removed some of the radius where it blends into the runner so the airflow has more of a direct shot into the engine.
Thread
Thread Starter
Forum
Replies
Last Post
Jeff20B
1st Generation Specific (1979-1985)
73
09-16-18 07:16 PM
HalifaxFD
Canadian Forum
126
05-09-16 07:06 PM