Head flow question

I had a /6 head flowed a few days ago, thanks to another member here.
It's been ported and has OS valves, and been shaved.
Question is, has anyone here had just a plain, old, random, stock /6 head flowed?
Can you post the results?
I was told, when done, that mine is a good, street, hi perf head/ when compared to a couple of other /6 heads that the "flow bench guy" has done over the years/// but didn't have any info on a plain old random stock head, before it may have been opened up.

No numbers but on slant6.org they have a lot of stuff and some maybe what your looking for.


For me flow numbers are good but even better when the ports are equal. Or close to even flow. Then bigger and then even. It’s how I’ve ported heads before I got smart and let professional people do them. Lol!

Well we only flowed 1 port due to time we had available to play with that day.
And the reason I asked on here is that when I went to .org, they have a heading about head flow in the engine FAQ but when I click on it I am returned to the exact screen that has the link to the results, tried it many times.
After clicking the same link so many times it's like wearing that shirt that says "how do you keep an idiot busy? See other side", and same thing printed front and back so I thought I'd come over here and ask.

So what were the results you got for your head?

The problem is flow can be altered and will vary by machine, operator, and set up. Its best to compare heads on the same machine, same setup and operator to get a true apples to apples comparison.

dano said:

The problem is flow can be altered and will vary by machine, operator, and set up. Its best to compare heads on the same machine, same setup and operator to get a true apples to apples comparison.

Click to expand...

All true, but I'd still like to know what results the OP got for his head.

Mine was done on a 10" WC bench, with "conversion factor" numbers for if it "had been done" on a 28" WC bench.
Every 50 thou from 50 to .550" high, and temp reading in n out flow. I wouldn't have thought there would be that much different air temp in that short of distance in vs out of the chamber. Especially not being actually under power.
We only did cyl 4 not the whole thing.
Took longer to calibrate the machine vs itself than to flow test that 1 cylinder.
I'd like to see my results vs stock/untouched before I post what I wound up with.
I'd like to have done all 6 cylinders worth/ but that would have taken all day, and since I'm not going against NHRA specs, I'm sure it's plenty good. remember/ mine is a daily driver truck engine that will occasionally actually be used like one, not a race car.
I did see comparo sheets from a head he did for himself, which is also on a truck/ his was better than mine at some lifts, mine eked his out at other lifts.
And a comparo sheet from one he did for someone else, that blew mine away at low lifts but was real close to mine at higher lifts, like around where my cam lift maxes out. But this head that blew mine away at lower lifts, was redone for 30* intake seats.

There are multiple threads/posts with stock flow values, there are differences between "169" & "447" castings particularly if bone stock & untouched with like valves. There's one "169" casting, "James Jagger's" '68 head, 140/109@.400,146/114@.500,147/115@.600. Pretty typical for a stk head with basic, quality valve job. A quick bowl blend/cleanup can pick up 12cfm@.400, & 17cfm@.500, no real change .300& down. My bench wasn't as "friendly" to the stock "169" when I checked Mine, but I prefer a stingey one anyways.

And yeah I have heard about having different results on different flow benches, these were 3 /6 heads, all done in this one flow bench.
I think mine is a 447 casting.
I've heard that most castings "stock" were pretty much the same, as in