Mopar Stage VI max wedge head progress and HP expectations

[Scott Kiger]

So I got these heads in a swap and decided to go all out on them. I sent them to KG Engines to have him use his CNC program on them. They turned out beautiful. Chambers ended up being 80CC after he reworked them. They will be smaller than that when finished as the heads will be milled some. They are going on a 496 that is based off a 440 block that is bored .040 with a 4.15 stroke crank. The block has billet caps, four bolt mains, a girdle, and will be filled. Overkill probably but planning on being at 15:1 compression. Running H beam rods and Icon 2618 alloy pistons at a zero deck height. Running Harland Sharp rockers with billet rocker stands. Cam is .750 lift solid roller with 292 duration. Do y’all think 750HP is a reasonable expectation out of this combo? Engine will be on alcohol.

 

[pnora]

Are these the Mopar or Chapman version. Part number will reference that. I ran them on a 440. They were a good head 20 years ago. You will need spacers or a special intake to run them. Porter racing can tell you more.

 

[Scott Kiger]

These are the Mopar version that KG went fully through for me. I have the correct 4500 flange Maxie intake for them.

 

[pnora]

These are the Mopar version that KG went fully through for me. I have the correct 4500 flange Maxie intake for them.

What intake do you have?

 

[Scott Kiger]

M1 Stage VI dominator flange. It’s the intake made for these heads. It is new never bolted on. The heads were new also before all the work was done.

 

[pnora]

M1 Stage VI dominator flange. It’s the intake made for these heads. It is new never bolted on. The heads were new also before all the work was done.

There are several intakes. My M1 with dominator flange required the spacers on a RB. There is a special intake that fits nothing else but a RB block using the stage6 heads without spacers. Thats why I asked what part number.

 

[Scott Kiger]

P4532758 is the part number. It is the right one to run on an RB block with these heads without the spacers

 

[PRHeads]

Do y’all think 750HP is a reasonable expectation out of this combo?

I’d say so.

 

[INTMD8]

They look super nice! As for the numbers, would be better to see the whole sheet.

Appears the numbers are corrected but would mean more if "corr to" wasn't chopped off.

 

[PRHeads]

To convert flow at 25” to flow at 28”, divide by .945

 

[INTMD8]

I thought the post originally said something to the effect of them being flowed at 25 so they would flow more at 28 (but the sheet appears to be corrected numbers already)