Pretty sure Ferea1232p was intake.

Thanks for the info.....

Hard to beat the performance and value of these heads. For 900 a set bare shipped to your door, vs 2600 a set for a set of afr's bare, hard to beat. And the afrs certainly dont perform 3x as good , or last 3x as long

I am seriously considering them also. I have heard nothing but good on EQ. My only concern was limiting cam choice. Since I decided on building NA for time being I need every edge I can get.

This might sound like a joke but any one have the balls to try a set of the promaxx that use to be patriot but now under new name and ownership I believe and foundry as well. I've read some articles on them where individuals were dissing them however they never owned a set. The positive feedback I've read are from individuals that actually are using the heads and like EQs don't take much to get decent numbers out of them.

But ya MT having two engines to consider the price gets pretty expensive when you go the high end brand name heads especially after there loaded up with all the good guy valves and parts.

I'd rather have a little less of a head and put the extra monies of what goes in it as well as machine work and getting set up 100% correct.

I just saw on Facebook, where someone was offering a CNC program on those promaxx heads. I believe they are offered in 320 and 360 cc as well.

That was my thoughts on the EQ heads. I am not looking to bolt on any brand head out of the box. So, whatever head I would purchase, is going to the machinist.

Lets say, you save 1700 bucks on a pair of heads . Thats 1700 you can use towards GOOD hardware, not some entry level springs, made to fit a variety of cam profiles. You can have the guides properly sized, some cleanup work done, or whatever. In the end, I feel you will simply have a better product for the same or less money.

Of course, there are some downsides. Dart, AFR, Brodix, offer a much greater selection of port sizes. I know alot of guys don't like iron, because they fear it will cause detonation, or sink their boat with all the extra weight.

I don't think power level is really an issue with the EQ heads. In the right hands, there are plenty of guys making 800, 900, 1000hp on motor with them in truck pull classes mandating iron heads. Of course these arent pump gas 5500rpm engines, but you know what I mean. Also, Quite a few guys are now offering CNC programs for them , flowing well over 400 cfm when ported. Chad Spier, Eric Weingartner, High Velocity heads in tennesse, and some others have CNC programs. Hell, Eric's CNC ported versions of them, he gets 2450 a pair bare. Flow 460 CFM he claims. Of course, they are no longer 320cc runners though after his cnc program.

I've heard good things about the new Promaxxx so far. A very reputable machine shop I use and trust just became a dealer. A friend of mine got a set of their full CNC through this shop to put on his 565 with an 8-71 blower. I am considering the 320 cc version myself. Should see some dyno numbers hopefully soon on that one. I have another friend who is probably going to use them on his 600SC refresh/pump up. That should be interesting too. I will post more when I hear more. So far reports I've heard from the one friend and the shop who is a dealer is that quality is very nice and so is the machine work. Thick decks too.

getrdunn - why would the EQ's limit your cam choice ?

i am gathering parts to build a 509.i bought a set of the eq 320,s that i am having a cnc valve job done on them,no port work .i got joe,s old inconel valves from his old heads and a set of manley severe duty ss intake valves.also have a set of 2618 forged pistons that will give me 10.1 to1 c/r.i am going to use a 525 efi cam and see what kind of power it makes,looking to spin it to 6000 rpm.i am looking for 625 but won,t be suprised if it does a little better.i won,t have time to complete this project untill late spring but when it is done i will post the results.

Very interested to see results of this!

Somehow I knew I'd here this from you and I think you know the answer. A point less in compression will limit cam choices due to valve timing etc. Iron 9.5 and aluminum 10.5 max on this heavy boat but at least has effficient bottom.

You ever install a cam in an engine that requires 11:1 static comp in an 9.3:1. Valve timing on cams I've got lined up are all 10.5:1 - 11:1. Back in the day I had friends who wanted the king of the drive in cam in their muscle cars so they and had an awesome ratty azz idle but ran like turds.