Pso heads

there was a set on racingjunk recently,but they were 10 grand...

Just do the predator head , its a way better platform and you might be able to get a set before November if you are lucky.

X3 There in not enough distinction between an MC and PSO just justify the cost. Just go to a Predator head where there is a larger potential. A properly done MC with the CORRECT port design will be just behind and properly done PSO when it is all said and done.

I don't really want to build a hole new motor. I just wanted to up grade and still use most of my parts that I have already.

Well pistons are the part that changes, and you will need to for the PSO as well anyway so I guess I don't see the issues.

If your going to do any class/heads-up racing stay with the wedge/conventional head as the predator head puts you in outlaw classes !!

Didn't know the MC B1's would flow close to 500CFM !!

For me I have to use a true wedge head in my class of racing and the PSO is the best option even if the gain is small...I paid around $2300 for mine bare and figure I will have from 8-10k in them finished...These heads are raw with nothing located on them and so far Slawko from out east is the only one I've found who has a cnc program for them...By the time he hand finishes them,softens the chamber and provides Ti valves you've dropped some serious coin !!

Muscle Motors is doing a set for me. I think they do their own CNC porting.

I would be shocked if Muscle Motor did any CNC porting of anything.
As far as I know they send everything out... To Modern I think.
Correct me if I am wrong, but pretty sure I am not.

Pso heads should be re-named POS...those heads are not work friendly and r really not that much faster than a indy head...for the cost...and the pain in the azz that they are....but what do I know

wish the mc heads would flow that. The best I have seen is 440 on flow and those heads were take to 3 different engine shops to have them flowed.

Well I have two set both between 475-480 on a number of different benches. One motor is just shy of 1100 at 525" with a fairly small cam. The other we will see hopefully next week. Both sets done by cylinder head specialists(rear non Mopar shops) that started with raw castings. IMO not worth the expense to go to a PSO if you over an MC or B1 for what is a potential of 25ish CFM.

BTW I know I hear it all the time no way those heads flow that much or make that power. But the car seems to run a representative number. I am doing a Predator deal now and will have some numbers eventually. Those heads are at 540-550cfm on the same bench as my MC stuff. We will see what kind of power they make here soon enough.

al,please post a pic of the port design of the b1 heads if you have one,i believe you said it was an oval design.seems you are getting more than average flow on yours.curiousity is killing me.....

I have owned 440-1 and 572-13 Indy heads. The Original B-1 will make more power than any Indy Head on a 4.800 bore space..

Give Tom Hemphill a call 724-639-9924 Tell Him Mark sent ya.. He is able to make billet heads. I have watched him make a billet B-1 head and he can alter the port however you want cause hes starting with a solid chunk of Aluminum.. He is in Clarksburg Pa

Billet B1 in Slawko hands =

Needs to have water in it

A PSO head casting is raw and how it is finished is up to the person working with them, so there can be many versions. People that have never seen one, built a engine with them or ran them should not make claims about them. They can be a great upgrade to the M/C casting, port shape, runner size and air flow all need to be considered. We have built many B-1 combos and our PSO head has made more HP to cubic inch than most anything we have tested. The Predator is not the saving grace some think it is, it is a good head and more user friendly than the B-1 stuff.

The Predator is not the saving grace some think it is, it is a good head and more user friendly than the B-1 stuff.

Pete, are you saying the Predator head, or PSO head, is more user friendly?

PSO

PSO #2

PSO #3

Predator

Predator #2

Predator #3

I went the Predator route.

I also tried to make some inquieries about the availability of the PSO heads and pricing, but really got no concrete response. So, bought a used set of Brewers and will try that route. They are a little different to the Indys they replace.

Pete, what would need to be done to get a set of Pso? I really don't want to put this back together with what I have right now.

All I got right now. They were sent of for a "tune up" and will be hopefully getting on the dyno this week. This is the original set

Don't send B1 MC heads to Tom Hemphill.
I sent mine there.
After 3 months they came back looking like this.
Car used to run 7.80 @ 170.
Now it has a hard time going quicker than 8sec.
New shop says they stall at .550" lift.

That looks like the typical port I see on most all B1 heads. Way to large a cross section, usually gone through somewhere. Not the way it should be done but typical. Just my

one thing i dont care for on my set,is the intake floor is dead flat and low.not a lot can be done with the short turn radius.its a shame they didnt cast more material in this area.without welding or epoxy you are limited in this area substantially.it stinks because the most gain would be in this area.i suppose thats why the pso came into existence with its much raised intake port....

I called Chuck today and are on the list for a set of PSO. Now all we need is4 more people to comit and when can get the ball rolling