Any guess on how much HP this port job plus CC305 cam
should produce?

Valve Job 3 angle

Stage II porting

Valve 1.940" IN / 1.500" EX Manley Stainless

Springs 1.250" Double Installed

Seals- Umbrella

Lock & Retainers 7 degree Comp Cams

Milling .005"

Flow- 235 cfm IN / 180 CFM EX @ .500" lift

 

no head expert here...but id venture a guess at 20-25+ hp

 

I would hope more than that. I would hope that the cam alone would make 20-25 HP.

 

In general, most peoples "stage 2" stuff peaks in the 25Xcfm range that I've tested on our bench. If you're lucky, 265-270 & rarely the usual 270+ claimed in real life.

Stock is around 210cfm... & you're running stock replacement parts in a head that flows about like an untouched LT4 casting. I'd hope for 350rwhp or so with an M6 car.

 

That's what I'm hoping for with all my mods I just need to get tuned for the cam. Mail order for now, dyno is too much $$$. I'm not sure if dyno would be worth it for my mods.

 

I was commenting on just the heads...like I said I'm no expert....