Yellow Bullet Forums banner

1 - 20 of 23 Posts

·
Registered
Joined
·
49 Posts
Well, do you think closing up the port so much that it never intersects that hole or moving the port down would be a little more "disrupting"? This is common in small block chevy heads and isn't a big deal.
 

·
Registered
Joined
·
2,859 Posts
Discussion Starter · #7 ·
Well, do you think closing up the port so much that it never intersects that hole or moving the port down would be a little more "disrupting"? This is common in small block chevy heads and isn't a big deal.
I can see that it is a problem in a smaller intake runner & low port.
Does the bolt extend though the hole or is it the opposite?
 

·
Registered
Joined
·
49 Posts
I can see that it is a problem in a smaller intake runner & low port.
Does the bolt extend though the hole or is it the opposite?
It is present in smaller runner/lower port heads also, but it just isn't a problem. The bolt doesn't extend out of the hole into the port, but you do use a thread sealant on the rocker arm studs/shaft mount pedestal bolts when assembling the head.
 

·
Registered
Joined
·
527 Posts
I can see that it is a problem in a smaller intake runner & low port.
Does the bolt extend though the hole or is it the opposite?
If you run the bolt all the way down into the runner it will help swirl and atomize the air/fuel. Try it!!!
 

·
Registered
Joined
·
1,147 Posts
I have back-to-back tested that, first with bare hole (not open to outside, with stud installed), then with the hole closed up and smoothed over with clay. Results; no measurable difference, at least on the heads tested.
mw
 

·
Registered
Joined
·
2,341 Posts
Poor attempt at humor I suppose.:)
Sounded like good advice for the competition, He He. There was a local smart ass one time that asked me about the surface rust in his cylinders(tore down for head gaskets at the time). I told him it would help the rings seal back LOL. You should have seen the blow bye and smoke!!!
 

·
Registered
Joined
·
2,859 Posts
Discussion Starter · #18 ·
I would want the holes filled in with some kind of compound or install the bolt & fill in the remaining opening & smooth out with the runner.
If the bolt went through you could grind off the end & smooth to the runner. One of the 2 would seem better IMO.
 

·
Registered
Joined
·
49 Posts
Do what you want, but i'd be more worried about the filler falling out and causing a shitload of problems....another one of those cases of fixing something that isn't broken.
 

·
Butch
Joined
·
8,209 Posts
Greg it doesnt matter if the hangs out a bit, a bunch of heads break through at the head bolt and porters LEAVE IT ALONE

When its sticking through you know you have 100% thread engagement, and I want to see this on aluminum heads

If you notice ARP has head studs for aluminum heads with more threads to use every bit of threads in the casting
 
1 - 20 of 23 Posts
Top