Goofing off with some CJ heads...

[blykins]

Sent heads off to be ported.  I think it will shake out pretty well for an old 390. 

[mbrunson427]

Are port-o-sonics cast with Dominator flanges hard to find?

[blykins]

Mike, I'm using a Super Sucker 4150/4500 adapter.  No Porto's were made with Dommie flanges (to my knowledge anyway).

[mbrunson427]

There's one in the mezzanine of the shop, used to run it on my uncles drag car. Just wondering why I don't see people using them, like you in this situation.

[blykins]

It's really a Port-o-sonic with a cast in Dominator flange?  Or is it a 360?

[mbrunson427]

It's a port-o-sonic, cast in dominator flange. Or else somebody did a ridiculously good job modifying it and making it look right haha

[blykins]

As you can see, I'm a big Molnar rod fan...



Two sets of those are Molnar 6.488" FE rods.  One set is destined for my 390. 



These rods only weigh 758g.   Most Scat rods that I've seen come in somewhere around 830g.  Quite a savings!

[gdaddy01]

pictures are good , the old saying , pictures are worth etc.  thanks , to see what the pros use makes a difference to me .

[blykins]

Heads are finished......added another column to the table:

In a table that's easier to read without scrolling up and down...

Intake Flow

         Factory      3/8" Ferrea     5/16"-7mm    Ported 5/16"-7mm, 2.080/1.650

.1       64                80                  76                62
.2      124              139                138               126
.3      182              195                204               197
.4      211              230                235               260
.5      224              246                248               279
.6      231              253                250               281
.7      236                                   252               289

Exhaust Flow

.1      52               64                  67                  54
.2      87              100                115                 107
.3     118             133                140                 134
.4     144             162                157                 156
.5     164             181                170                 171
.6     174             188                180                 183
.7     179                                  189                 191

[chilly460]

Really nice numbers for iron heads, imagine the 5/16" are fairly light?  No idea on reliability concerns of 5/16", or cost difference, but could help out the hydraulic roller guys if they work out.

[blykins]

Every valve weighs about 85g.  Incredibly light. 

No issues with the smaller stem valves, it's almost common place to see 7mm and 5/16" valves on SBF and SBC heads these days.

[Falcon67]

Hmmm - got to really lift that intake to get the full benefit but it does really start to wake up over .3.  Interesting how it took a real hit coming off the seat.  Exhaust didn't seem to make much difference, pretty decent out of the box. 

[matt souders]

Did you happen to cc the ports before and/or after?

[blykins]

Did you happen to cc the ports before and/or after?

I will cc them before assembly.  I didn't check them before. 

I'm going to set aside some time to work on them this coming weekend.  They need to be milled and I need to see how much they need to be cut.  I'll check a port too.

[FErocious]

Posted by: mbrunson427
« on: July 10, 2018, 10:35:28 AM »
Insert Quote

It's a port-o-sonic, cast in dominator flange. Or else somebody did a ridiculously good job modifying it and making it look right haha



it is most likely an Offenhauser Equa-Flow intake. I guess it is possible that there are some FE Super-Sonic intakes out there, but to my recollection I am only aware of that intake being available in sbc,bbc and big block Olds.