PRO1 23° 245cc CNC Heads

[badfast47]

Will they make power on a SBC 406

[over4T]

Probably not where you can use it. That's a pretty big head for a 406.

[badfast47]

What do i need to use it on ? A 434 ?

[over4T]

Something 427 or bigger and well built. If you are locked into the 406 I'd look for heads in the 215 cc range.

[badfast47]

ok Thank's for the info

[perfconn]

I have a set of Brodix that cc'd 241 on a 362ci that made 649hp & 529# torque.They may be too big for a 406ci but they run fine on a 362ci.

[usafracer]

What RPM are you turning?

[badfast47]

Looking to turn 7500 to 8000.

[badfast47]

This is a new build and have never have used these heads b4. So that's why i'm looking for info

[over4T]

I stand by my original answer that they're too big. You've been on here for over two years asking for thoughts on heads that 99% of the people who have answered you keep saying too big. Suggest you listen to the majority since you obviously aren't an experienced builder as most of the ones who answer you are. Good luck.

[perfconn]

Any size head can be made to work if you know what you are doing.Nascar makes heads that are over 300cc work on a 358ci.Just takes all the right parts to go with the heads.

[billetbirdcage]

CC's is a bad way to measure or compare heads unless the valve angle and port length are basically the same. What you are looking for is pinch area, that tells you more about the head volume then CC's will.

Take a typical 23 degree head and 230 is reasonable mid to larger sized head, but take a SB2.2 head and a smaller ones is 280 CC's so it appears the SB2 head is large but it's because the ports are so long they have more CC's but may be a smaller cross section/pinch area.

Most of you new heads are listed with pinch area instead of CC?s, that's why. Not an expert here but if the 23 degree is a raised port the port may be longer then a typical 23 degree head and thus more CC's for the same width/pinch as a non/slight raised 230CC head

[Jking24]

Any size head can be made to work if you know what you are doing.Nascar makes heads that are over 300cc work on a 358ci.Just takes all the right parts to go with the heads.

They also turn 9000+ rpm. Might be going out on a limb here but anyone asking about heads on a forum likely doesn't have the budget to build a 9000+rpm 358

[badfast47]

I stand by my original answer that they're too big. You've been on here for over two years asking for thoughts on heads that 99% of the people who have answered you keep saying too big. Suggest you listen to the majority since you obviously aren't an experienced builder as most of the ones who answer you are. Good luck.

Well 4T Went back 4 years asking about these heads. Guess what.... YOUR WRONG. Ask once about the 383, 388 1 year ago but never ask about the 406. Good Luck to u.

[badfast47]

I Love this Sh%t