Just wondering if anyone has photos of one of these heads chopped up
so you can see the port shapes, water passages, etc. ?

I found some photos of the Victor heads chopped up, very informative.

Probably old news for a lot of people but I am behind the times.

Anyone have February 1993 Mopar Action ?

There is an article in that about Stage VI's.

Also Mopar Muscle August 1997.

I have heard the stock head was not worth the money,after there were ported they were supposed to be pretty good.
Here is some data..........

Chrysler COPYRIGHT © 2000-2018 Stan Weiss — World Wide Enterprises
Manufacturer
Part Number Port/Vol
Int/Exh Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 Average
Chrysler 2.2 445 N/A Stock N/A 53/39 103/75 140/97 156/113 165/123 - - - - -
Chrysler '93-94 782 N/A Stock N/A 42/39 81/76 109/93 130/106 143/112 - - - - -
Chrysler Swirl N/A 1.60/1.39 N/A - 98/78 125/103 145/122 157/128 - - - - -
Chrysler Swirl Ported N/A 1.60/1.39 N/A - - - 157/121 177/132 - - - - -
Chrysler Swirl Ported N/A - N/A - 100/91 137/111 165/129 185/143 - - - - -
Chrysler "G" N/A 1.60/1.39 N/A 49/38 98/79 131/106 152/119 163/124 - - - - -
Chrysler "G" Ported Welded N/A - N/A 55/53 108/97 153/129 177/160 195/175 210/184 - - - -
Chrysler Slant 6 -/71 - N/A -/42 -/74 -/98 -/116 -/121 -/124 - - - -
Chrysler Slant 6 Ported Pacer -/79 1.72/1.50 N/A 58/55 111/95 156/124 184/141 195/147 -/154 - - - -
Chrysler Slant 6 Ported N/A 1.88/1.50 N/A 58/46 121/102 146/124 185/139 195/161 203/163 - - - -
CHI HEMI 6 Alum N/A 2.02/1.60 N/A 63/56 135/112 190/134 231/172 266/194 276/205 - - - -
Chrysler 318 Poly Gary Pavlovich N/A Stock N/A 50/45 116/83 149/106 171/126 183/150 - - - - -
Manufacturer
Part Number Port/Vol
Int/Exh Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 Average
Chrysler 318 Poly Ported Gary Pavlovich N/A - N/A 69/48 145/88 188/113 202/134 211/159 218/164 - - - -
Chrysler Poly Pocket Ported N/A 1.845/1.565 N/A - - - - 228/160 - - - - -
Chrysler 3.5l v6 Frank Racing N/A 36.5mm/ 29mm N/A 91/53 164/125 213/163 227/168 234/174 - - - - -
Chrysler 3.5l v6 Ported Stage 1 Frank Racing N/A 36.5mm/ 29mm N/A 94/75 184/144 252/178 290/180 295/184

I have a set.

I picked up a set of Chapman ported stage 6 aluminum heads.Put them on a siamesed bore MOPAR block with a BDS blower. I am a bad influence on my friends

Bad as in good

The first castings and the Chapman cnc castings are not the same. The issue with the originals is they used a stock length valve. This caused the spring pocket to be very close to the port roof. As I remember the Chapmans used a longer valve and had the spring seat raised.
Doug

There's a bunch of info in the Tech Archives (Big Block).
There were early Winters casting (casting issues), later Winters, Zues, an unknown small batch (I have a set), and then the Chapman era. Many versions were marketed & sold with various stages of completion.

I had a set of the Chapmans also but I sold them new.. they looked pretty decent and flowed pretty good

I would argue that in most cases(at least as it pertains to the many sets I’ve had here in the shop), that would be the least of the “issues”.

Every time I had a set here, there would be some new anomaly I hadn’t seen before.

The norm was widely varying valve depths and chamber volumes, guides with almost .003 clearance ootb, rocker stands machined to different heights, intake surfaces not milled parallel to the dowel pin c/l, chambers that were wider than the fire ring on most head gaskets, head dowel pins too far apart....... and the list goes on and on.

Then, many times after all of the particular heads you’re working on have had all of that stuff remedied....... after they have been in service a while........ the seat rings start moving around in the heads....... often, a lot.
I know of one case where after shut down, and a heat soak....... an exhaust seat actually just dropped out of the head.

If you got everything sorted out........ on certain combos....... they could make pretty good power.

The least problematic were the Zeus castings.
The few sets of those I’ve had here didn’t really require anything except fairly normal prep.


I have some pics of what I believe are unfinished castings that Chapman would get....... sort of.
I don’t think this version of the head, other than those finished by Chapman were ever offered for public consumption.

The pics look like heads that would get cnc ported, but they have the spring pockets cut real deep, like the original version.

I never saw these in person, just the pics.

Things that are easily visible compared to earlier normal stage 6’s.....

- physically smaller chambers
- offset intake rocker required
- ex port opening cnc’d
- bolt on rocker stands required
- guide bosses in the ports are much less intrusive, especially the intake
- relocated oil feed hole to rockers

Couple more

I actually have a set of those heads with the "2021" cast into them.
The story passed on to me, they're from a small batch of 25 or so.

They look like they’d work pretty well....... but these days with what else is on the market, and considering what they can be bought for, vs what you’d have in parts/labor/rockers on those 6’s....... they’re certainly not going to rank very high on the “bang for the buck” list.

But....... you’d have some pretty unique pieces on your motor if you were running them.

Do yours have the deep spring pockets too?

Looking at the chamber pic some more, I see that head still uses the grossly undersized seat rings.

Yeah, an exercise in novelty. I had Bob Kobylski at Modern Cyl Head CNC them & match port the intake to Max Wedge config.
They have the deep vlv pockets, I notched them and had a stash of old MP valvesprings & titanium retainers.
They were cast with a revised short turn in the exh port.