Nabdrill

iTrader: (19)

Got my heads back from the shop... look really nice. Here's the flow data for anyone interested. They'll be going on my n/a 408.

3/29/2010
4.000 flow plate
28.0 Hg

Lift Intake Flow Exhaust Flow
(inches) (CFM) (CFM)
0.100 79.2 57.8
0.200 153.0 114.4
0.300 225.0 147.2
0.400 276.0 170.3
0.500 309.6 183.1
0.550 323.2 186.0
0.600 332.2 189.5
0.650 327.7 191.1
0.700 330.0 192.6
0.800 317.0 195.8

Justus67

iTrader: (3)

Who did the work? Thats exactly the numbers I was looking for a .600

Nabdrill

iTrader: (19)

Wesley Robertson in West Monroe, LA did the work. The ports for the most part are stock, as well as the valves. He milled them them to 69cc, valve job, and did some work in the comb chamber.

Justus67

iTrader: (3)

Nice, are you going to port them?

Nabdrill

iTrader: (19)

No plans to port these.

SOMbitch

iTrader: (8)

NICE!! Most people have no idea what a little valve/chamber/seat work can do.. And you keep the stock runner size so it is a win- win with no sacrifice anywhere.....

Nabdrill

iTrader: (19)

anyone know the typical flow #'s for a set of 317's. I should have had them flowed before we touched them... would've been another $80.

Beaflag VonRathburg

iTrader: (176)

Uh... Tony... you're needed.

Nabdrill

iTrader: (19)

Prob should've just kept to myself with this... usually when you see a post like this, you've got to get your gloves out

I don't have any idea if these are poor, average, or good flow numbers. I just thought it was nice data to have since he had a flow bench.

And for the record, I won't debate the numbers... as I don't have the appropriate knowledge base to do so.

BadgeZ28

iTrader: (28)

I have never seen numbers that high for 317's

SOMbitch

iTrader: (8)

317's flow 260ish stock so honestly I wouldn't expect those gains but I don't know how much porting was done since you said "mild". If porting was done though not much was done on the exhaust side......

Nabdrill

iTrader: (19)

So I've just been reading the "Interesting Flow #'s" thread by Tony. "W" LS6 casting were 324 intake, 241 exhaust... big #'s in comparison to some of the others. And I used the 317's because they were supposedly LS6 with big comb chambers.

Does this fellow have a "happy" flowbench?... maybe, I don't know. Either way, these are the heads I've got, and will use. I don't know the exact model of flowbench he has, but it's blue.

Maybe I should get some #'s on the stock 241's I have for some comparrison

SOMbitch

iTrader: (8)

And they were ported castings....

They should work well. Just enjoy them.